This improves how perf test handles finding shell scripts to run as part of the testing allowing sub-directories, skipping files that are not intentional shell script tests and then adds a set of tests that improve what we cover for Arm CoreSight testing. The goal of these tests is to expand the scenarios and data traced and examined to track quality of trace data and improvements to that over time.
Eventually it'd be neater to break up the current Arm CoreSight tests into smaller focused tests that share the same infrastructure, but this here would be a first step.
From: "Carsten Haitzler (Rasterman)" raster@rasterman.com
This is a prelude to adding more tests to shell tests and in order to support putting those tests into subdirectories, I need to change the test code that scans/finds and runs them.
To support subdirs I have to recurse so it's time to refactor the code to allow this and centralize the shell script finding into one location and only one single scan that builds a list of all the found tests in memory instead of it being duplicated in 3 places.
This code also optimizes things like knowing the max width of desciption strings (as we can do that while we scan instead of a whole new pass of opening files). It also more cleanly filters scripts to see only *.sh files thus skipping random other files in directories like *~ backup files, other random junk/data files that may appear and the scripts must be executable to make the cut (this ensures the script lib dir is not seen as scripts to run). This avoids perf test running previous older versions of test scripts that are editor backup files as well as skipping perf.data files that may appear and so on.
Signed-off-by: Carsten Haitzler carsten.haitzler@arm.com --- tools/perf/tests/Build | 1 + tools/perf/tests/builtin-test-list.c | 201 +++++++++++++++++++++++++++ tools/perf/tests/builtin-test-list.h | 12 ++ tools/perf/tests/builtin-test.c | 152 +++----------------- 4 files changed, 232 insertions(+), 134 deletions(-) create mode 100644 tools/perf/tests/builtin-test-list.c create mode 100644 tools/perf/tests/builtin-test-list.h
diff --git a/tools/perf/tests/Build b/tools/perf/tests/Build index af2b37ef7c70..2064a640facb 100644 --- a/tools/perf/tests/Build +++ b/tools/perf/tests/Build @@ -1,6 +1,7 @@ # SPDX-License-Identifier: GPL-2.0
perf-y += builtin-test.o +perf-y += builtin-test-list.o perf-y += parse-events.o perf-y += dso-data.o perf-y += attr.o diff --git a/tools/perf/tests/builtin-test-list.c b/tools/perf/tests/builtin-test-list.c new file mode 100644 index 000000000000..1e60088c1005 --- /dev/null +++ b/tools/perf/tests/builtin-test-list.c @@ -0,0 +1,201 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#include <fcntl.h> +#include <errno.h> +#include <unistd.h> +#include <string.h> +#include <stdlib.h> +#include <sys/types.h> +#include <dirent.h> +#include <sys/wait.h> +#include <sys/stat.h> +#include "builtin.h" +#include "hist.h" +#include "intlist.h" +#include "tests.h" +#include "debug.h" +#include "color.h" +#include <subcmd/parse-options.h> +#include "string2.h" +#include "symbol.h" +#include "util/rlimit.h" +#include <linux/kernel.h> +#include <linux/string.h> +#include <subcmd/exec-cmd.h> +#include <linux/zalloc.h> + +#include "builtin-test-list.h" + +#include <linux/ctype.h> + +/* As this is a singleton built once for the run of the process, there is + * no value in trying to free it and just let it stay around until process + * exits when it's cleaned up. */ +static size_t files_num = 0; +static struct script_file *files = NULL; +static int files_max_width = 0; + +static const char *shell_tests__dir(char *path, size_t size) +{ + const char *devel_dirs[] = { "./tools/perf/tests", "./tests", }; + char *exec_path; + unsigned int i; + + for (i = 0; i < ARRAY_SIZE(devel_dirs); ++i) { + struct stat st; + + if (!lstat(devel_dirs[i], &st)) { + scnprintf(path, size, "%s/shell", devel_dirs[i]); + if (!lstat(devel_dirs[i], &st)) + return path; + } + } + + /* Then installed path. */ + exec_path = get_argv_exec_path(); + scnprintf(path, size, "%s/tests/shell", exec_path); + free(exec_path); + return path; +} + +static const char *shell_test__description(char *description, size_t size, + const char *path, const char *name) +{ + FILE *fp; + char filename[PATH_MAX]; + int ch; + + path__join(filename, sizeof(filename), path, name); + fp = fopen(filename, "r"); + if (!fp) + return NULL; + + /* Skip first line - should be #!/bin/sh Shebang */ + do { + ch = fgetc(fp); + } while (ch != EOF && ch != '\n'); + + description = fgets(description, size, fp); + fclose(fp); + + /* Assume first char on line is omment everything after that desc */ + return description ? strim(description + 1) : NULL; +} + +static bool is_shell_script(const char *path) +{ /* is this full file path a shell script */ + const char *ext; + + ext = strrchr(path, '.'); + if (!ext) + return false; + if (!strcmp(ext, ".sh")) { /* Has .sh extension */ + if (access(path, R_OK | X_OK) == 0) /* Is executable */ + return true; + } + return false; +} + +static bool is_test_script(const char *path, const char *name) +{ /* Is this file in this dir a shell script (for test purposes) */ + char filename[PATH_MAX]; + + path__join(filename, sizeof(filename), path, name); + if (!is_shell_script(filename)) return false; + return true; +} + +static char *strdup_check(const char *str) +{ /* Duplicate a string and fall over and die if we run out of memory */ + char *newstr; + + newstr = strdup(str); + if (!newstr) { + pr_err("Out of memory while duplicating test script string\n"); + abort(); + } + return newstr; +} + +static void append_script(const char *dir, const char *file, const char *desc) +{ + struct script_file *files_tmp; + size_t files_num_tmp; + int width; + + files_num_tmp = files_num + 1; + if (files_num_tmp < 1) { + pr_err("Too many script files\n"); + abort(); + } + /* Realloc is good enough, though we could realloc by chunks, not that + * anyone will ever measure performance here */ + files_tmp = realloc(files, + (files_num_tmp + 1) * sizeof(struct script_file)); + if (files_tmp == NULL) { + pr_err("Out of memory while building test list\n"); + abort(); + } + /* Add file to end and NULL terminate the struct array */ + files = files_tmp; + files_num = files_num_tmp; + files[files_num - 1].dir = strdup_check(dir); + files[files_num - 1].file = strdup_check(file); + files[files_num - 1].desc = strdup_check(desc); + files[files_num].dir = NULL; + files[files_num].file = NULL; + files[files_num].desc = NULL; + + width = strlen(desc); /* Track max width of desc */ + if (width > files_max_width) + files_max_width = width; +} + +static void append_scripts_in_dir(const char *path) +{ + struct dirent **entlist; + struct dirent *ent; + int n_dirs, i; + char filename[PATH_MAX]; + + /* List files, sorted by alpha */ + n_dirs = scandir(path, &entlist, NULL, alphasort); + if (n_dirs == -1) + return; + for (i = 0; i < n_dirs && (ent = entlist[i]); i++) { + if (ent->d_name[0] == '.') continue; /* Skip hidden files */ + if (is_test_script(path, ent->d_name)) { /* It's a test */ + char bf[256]; + const char *desc = shell_test__description + (bf, sizeof(bf), path, ent->d_name); + + if (desc) /* It has a desc line - valid script */ + append_script(path, ent->d_name, desc); + } else if (is_directory(path, ent)) { /* Scan the subdir */ + path__join(filename, sizeof(filename), + path, ent->d_name); + append_scripts_in_dir(filename); + } + } + for (i = 0; i < n_dirs; i++) /* Clean up */ + zfree(&entlist[i]); + free(entlist); +} + +const struct script_file *list_script_files(void) +{ + char path_dir[PATH_MAX]; + const char *path; + + if (files) return files; /* Singleton - we already know our list */ + + path = shell_tests__dir(path_dir, sizeof(path_dir)); /* Walk dir */ + append_scripts_in_dir(path); + + return files; +} + +int list_script_max_width(void) +{ + list_script_files(); /* Ensure we have scanned all scriptd */ + return files_max_width; +} diff --git a/tools/perf/tests/builtin-test-list.h b/tools/perf/tests/builtin-test-list.h new file mode 100644 index 000000000000..eb81f3aa6683 --- /dev/null +++ b/tools/perf/tests/builtin-test-list.h @@ -0,0 +1,12 @@ +/* SPDX-License-Identifier: GPL-2.0 */ + +struct script_file { + char *dir; + char *file; + char *desc; +}; + +/* List available script tests to run - singleton - never freed */ +const struct script_file *list_script_files(void); +/* Get maximum width of description string */ +int list_script_max_width(void); diff --git a/tools/perf/tests/builtin-test.c b/tools/perf/tests/builtin-test.c index 81cf241cd109..7122eae1d98d 100644 --- a/tools/perf/tests/builtin-test.c +++ b/tools/perf/tests/builtin-test.c @@ -28,6 +28,8 @@ #include <subcmd/exec-cmd.h> #include <linux/zalloc.h>
+#include "builtin-test-list.h" + static bool dont_fork;
struct test_suite *__weak arch_tests[] = { @@ -274,91 +276,6 @@ static int test_and_print(struct test_suite *t, int subtest) return err; }
-static const char *shell_test__description(char *description, size_t size, - const char *path, const char *name) -{ - FILE *fp; - char filename[PATH_MAX]; - int ch; - - path__join(filename, sizeof(filename), path, name); - fp = fopen(filename, "r"); - if (!fp) - return NULL; - - /* Skip shebang */ - do { - ch = fgetc(fp); - } while (ch != EOF && ch != '\n'); - - description = fgets(description, size, fp); - fclose(fp); - - return description ? strim(description + 1) : NULL; -} - -#define for_each_shell_test(entlist, nr, base, ent) \ - for (int __i = 0; __i < nr && (ent = entlist[__i]); __i++) \ - if (!is_directory(base, ent) && \ - is_executable_file(base, ent) && \ - ent->d_name[0] != '.') - -static const char *shell_tests__dir(char *path, size_t size) -{ - const char *devel_dirs[] = { "./tools/perf/tests", "./tests", }; - char *exec_path; - unsigned int i; - - for (i = 0; i < ARRAY_SIZE(devel_dirs); ++i) { - struct stat st; - if (!lstat(devel_dirs[i], &st)) { - scnprintf(path, size, "%s/shell", devel_dirs[i]); - if (!lstat(devel_dirs[i], &st)) - return path; - } - } - - /* Then installed path. */ - exec_path = get_argv_exec_path(); - scnprintf(path, size, "%s/tests/shell", exec_path); - free(exec_path); - return path; -} - -static int shell_tests__max_desc_width(void) -{ - struct dirent **entlist; - struct dirent *ent; - int n_dirs, e; - char path_dir[PATH_MAX]; - const char *path = shell_tests__dir(path_dir, sizeof(path_dir)); - int width = 0; - - if (path == NULL) - return -1; - - n_dirs = scandir(path, &entlist, NULL, alphasort); - if (n_dirs == -1) - return -1; - - for_each_shell_test(entlist, n_dirs, path, ent) { - char bf[256]; - const char *desc = shell_test__description(bf, sizeof(bf), path, ent->d_name); - - if (desc) { - int len = strlen(desc); - - if (width < len) - width = len; - } - } - - for (e = 0; e < n_dirs; e++) - zfree(&entlist[e]); - free(entlist); - return width; -} - struct shell_test { const char *dir; const char *file; @@ -385,33 +302,17 @@ static int shell_test__run(struct test_suite *test, int subdir __maybe_unused) static int run_shell_tests(int argc, const char *argv[], int i, int width, struct intlist *skiplist) { - struct dirent **entlist; - struct dirent *ent; - int n_dirs, e; - char path_dir[PATH_MAX]; - struct shell_test st = { - .dir = shell_tests__dir(path_dir, sizeof(path_dir)), - }; - - if (st.dir == NULL) - return -1; + struct shell_test st; + const struct script_file *files, *file;
- n_dirs = scandir(st.dir, &entlist, NULL, alphasort); - if (n_dirs == -1) { - pr_err("failed to open shell test directory: %s\n", - st.dir); - return -1; - } - - for_each_shell_test(entlist, n_dirs, st.dir, ent) { + files = list_script_files(); + if (!files) + return 0; + for (file = files; file->dir; file++) { int curr = i++; - char desc[256]; struct test_case test_cases[] = { { - .desc = shell_test__description(desc, - sizeof(desc), - st.dir, - ent->d_name), + .desc = file->desc, .run_case = shell_test__run, }, { .name = NULL, } @@ -421,12 +322,13 @@ static int run_shell_tests(int argc, const char *argv[], int i, int width, .test_cases = test_cases, .priv = &st, }; + st.dir = file->dir;
if (test_suite.desc == NULL || !perf_test__matches(test_suite.desc, curr, argc, argv)) continue;
- st.file = ent->d_name; + st.file = file->file; pr_info("%3d: %-*s:", i, width, test_suite.desc);
if (intlist__find(skiplist, i)) { @@ -436,10 +338,6 @@ static int run_shell_tests(int argc, const char *argv[], int i, int width,
test_and_print(&test_suite, 0); } - - for (e = 0; e < n_dirs; e++) - zfree(&entlist[e]); - free(entlist); return 0; }
@@ -448,7 +346,7 @@ static int __cmd_test(int argc, const char *argv[], struct intlist *skiplist) struct test_suite *t; unsigned int j, k; int i = 0; - int width = shell_tests__max_desc_width(); + int width = list_script_max_width();
for_each_test(j, k, t) { int len = strlen(test_description(t, -1)); @@ -529,36 +427,22 @@ static int __cmd_test(int argc, const char *argv[], struct intlist *skiplist)
static int perf_test__list_shell(int argc, const char **argv, int i) { - struct dirent **entlist; - struct dirent *ent; - int n_dirs, e; - char path_dir[PATH_MAX]; - const char *path = shell_tests__dir(path_dir, sizeof(path_dir)); - - if (path == NULL) - return -1; + const struct script_file *files, *file;
- n_dirs = scandir(path, &entlist, NULL, alphasort); - if (n_dirs == -1) - return -1; - - for_each_shell_test(entlist, n_dirs, path, ent) { + files = list_script_files(); + if (!files) + return 0; + for (file = files; file->dir; file++) { int curr = i++; - char bf[256]; struct test_suite t = { - .desc = shell_test__description(bf, sizeof(bf), path, ent->d_name), + .desc = file->desc };
if (!perf_test__matches(t.desc, curr, argc, argv)) continue;
pr_info("%3d: %s\n", i, t.desc); - } - - for (e = 0; e < n_dirs; e++) - zfree(&entlist[e]); - free(entlist); return 0; }
From: "Carsten Haitzler (Rasterman)" raster@rasterman.com
This adds a library of shell "code" to be shared and used by future tests that target quality testing for Arm CoreSight support in perf and the Linux kernel.
Signed-off-by: Carsten Haitzler carsten.haitzler@arm.com --- tools/perf/tests/shell/lib/coresight.sh | 122 ++++++++++++++++++++++++ 1 file changed, 122 insertions(+) create mode 100644 tools/perf/tests/shell/lib/coresight.sh
diff --git a/tools/perf/tests/shell/lib/coresight.sh b/tools/perf/tests/shell/lib/coresight.sh new file mode 100644 index 000000000000..1d6c90c3b8c1 --- /dev/null +++ b/tools/perf/tests/shell/lib/coresight.sh @@ -0,0 +1,122 @@ +# SPDX-License-Identifier: GPL-2.0 +# Carsten Haitzler carsten.haitzler@arm.com, 2021 + +# This is sourced from a driver script so no need for #!/bin... etc. at the +# top - the assumption below is that it runs as part of sourcing after the +# test sets up some basic env vars to say what it is. + +# perf record options for the perf tests to use +PERFRECMEM="-m ,16M" +PERFRECOPT="$PERFRECMEM -e cs_etm//u" + +TOOLS=$(dirname $0) +DIR="$TOOLS/$TEST" +BIN="$DIR/$TEST" +# If the test tool/binary does not exist and is executable then skip the test +if ! test -x "$BIN"; then exit 2; fi +DATD="." +# If the data dir env is set then make the data dir use that instead of ./ +if test -n "$PERF_TEST_CORESIGHT_DATADIR"; then + DATD="$PERF_TEST_CORESIGHT_DATADIR"; +fi +# If the stat dir env is set then make the data dir use that instead of ./ +STATD="." +if test -n "$PERF_TEST_CORESIGHT_STATDIR"; then + STATD="$PERF_TEST_CORESIGHT_STATDIR"; +fi + +# Called if the test fails - error code 2 +err() { + echo "$1" + exit 1 +} + +# Check that some statistics from our perf +check_val_min() { + STATF="$4" + if test "$2" -lt "$3"; then + echo ", FAILED" >> "$STATF" + err "Sanity check number of $1 is too low ($2 < $3)" + fi +} + +perf_dump_aux_verify() { + # Some basic checking that the AUX chunk contains some sensible data + # to see that we are recording something and at least a minimum + # amount of it. We should almost always see F3 atoms in just about + # anything but certainly we will see some trace info and async atom + # chunks. + DUMP="$DATD/perf-tmp-aux-dump.txt" + perf report --stdio --dump -i "$1" | \ + grep -o -e I_ATOM_F3 -e I_ASYNC -e I_TRACE_INFO > "$DUMP" + # Simply count how many of these atoms we find to see that we are + # producing a reasonable amount of data - exact checks are not sane + # as this is a lossy process where we may lose some blocks and the + # compiler may produce different code depending on the compiler and + # optimization options, so this is rough just to see if we're + # either missing almost all the data or all of it + ATOM_F3_NUM=`grep I_ATOM_F3 "$DUMP" | wc -l` + ATOM_ASYNC_NUM=`grep I_ASYNC "$DUMP" | wc -l` + ATOM_TRACE_INFO_NUM=`grep I_TRACE_INFO "$DUMP" | wc -l` + rm -f "$DUMP" + + # Arguments provide minimums for a pass + CHECK_F3_MIN="$2" + CHECK_ASYNC_MIN="$3" + CHECK_TRACE_INFO_MIN="$4" + + # Write out statistics, so over time you can track results to see if + # there is a pattern - for example we have less "noisy" results that + # produce more consistent amounts of data each run, to see if over + # time any techinques to minimize data loss are having an effect or + # not + STATF="$STATD/stats-$TEST-$DATV.csv" + if ! test -f "$STATF"; then + echo "ATOM F3 Count, Minimum, ATOM ASYNC Count, Minimum, TRACE INFO Count, Minimum" > "$STATF" + fi + echo -n "$ATOM_F3_NUM, $CHECK_F3_MIN, $ATOM_ASYNC_NUM, $CHECK_ASYNC_MIN, $ATOM_TRACE_INFO_NUM, $CHECK_TRACE_INFO_MIN" >> "$STATF" + + # Actually check to see if we passed or failed. + check_val_min "ATOM_F3" "$ATOM_F3_NUM" "$CHECK_F3_MIN" "$STATF" + check_val_min "ASYNC" "$ATOM_ASYNC_NUM" "$CHECK_ASYNC_MIN" "$STATF" + check_val_min "TRACE_INFO" "$ATOM_TRACE_INFO_NUM" "$CHECK_TRACE_INFO_MIN" "$STATF" + echo ", Ok" >> "$STATF" +} + +perf_dump_aux_tid_verify() { + # Specifically crafted test will produce a list of Tread ID's to + # stdout that need to be checked to see that they have had trace + # info collected in AUX blocks in the perf data. This will go + # through all the TID's that are listed as CID=0xabcdef and see + # that all the Thread IDs the test tool reports are in the perf + # data AUX chunks + + # The TID test tools will print a TID per stdout line that are being + # tested + TIDS=`cat "$2"` + # Scan the perf report to find the TIDs that are actually CID in hex + # and build a list of the ones found + FOUND_TIDS=`perf report --stdio --dump -i "$1" | \ + grep -o "CID=0x[0-9a-z]+" | sed 's/CID=//g' | \ + uniq | sort | uniq` + + # Iterate over the list of TIDs that the test says it has and find + # them in the TIDs found in the perf report + MISSING="" + for TID2 in $TIDS; do + FOUND="" + for TIDHEX in $FOUND_TIDS; do + TID=`printf "%i" $TIDHEX` + if test "$TID" -eq "$TID2"; then + FOUND="y" + break + fi + done + if test -z "$FOUND"; then + MISSING="$MISSING $TID" + fi + done + if test -n "$MISSING"; then + err "Thread IDs $MISSING not found in perf AUX data" + fi +}
From: "Carsten Haitzler (Rasterman)" raster@rasterman.com
This adds the initial build infrastructure (makefiles maintainers information) for adding follow-on tests for CoreSight.
Signed-off-by: Carsten Haitzler carsten.haitzler@arm.com --- MAINTAINERS | 1 + tools/perf/Makefile.perf | 18 ++++++++++--- tools/perf/tests/shell/coresight/Makefile | 26 +++++++++++++++++++ .../tests/shell/coresight/Makefile.miniconfig | 24 +++++++++++++++++ 4 files changed, 66 insertions(+), 3 deletions(-) create mode 100644 tools/perf/tests/shell/coresight/Makefile create mode 100644 tools/perf/tests/shell/coresight/Makefile.miniconfig
diff --git a/MAINTAINERS b/MAINTAINERS index 171563d8dc14..87e4ac463429 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -1989,6 +1989,7 @@ F: drivers/hwtracing/coresight/* F: include/dt-bindings/arm/coresight-cti-dt.h F: include/linux/coresight* F: samples/coresight/* +F: tools/perf/tests/shell/coresight/* F: tools/perf/arch/arm/util/auxtrace.c F: tools/perf/arch/arm/util/cs-etm.c F: tools/perf/arch/arm/util/cs-etm.h diff --git a/tools/perf/Makefile.perf b/tools/perf/Makefile.perf index 8f738e11356d..edb621ace2e2 100644 --- a/tools/perf/Makefile.perf +++ b/tools/perf/Makefile.perf @@ -629,7 +629,15 @@ sync_file_range_tbls := $(srctree)/tools/perf/trace/beauty/sync_file_range.sh $(sync_file_range_arrays): $(linux_uapi_dir)/fs.h $(sync_file_range_tbls) $(Q)$(SHELL) '$(sync_file_range_tbls)' $(linux_uapi_dir) > $@
-all: shell_compatibility_test $(ALL_PROGRAMS) $(LANG_BINDINGS) $(OTHER_PROGRAMS) +TESTS_CORESIGHT_DIR := $(srctree)/tools/perf/tests/shell/coresight + +tests-coresight-targets: FORCE + $(Q)$(MAKE) -C $(TESTS_CORESIGHT_DIR) + +tests-coresight-targets-clean: + $(Q)$(MAKE) -C $(TESTS_CORESIGHT_DIR) clean + +all: shell_compatibility_test $(ALL_PROGRAMS) $(LANG_BINDINGS) $(OTHER_PROGRAMS) tests-coresight-targets
# Create python binding output directory if not already present _dummy := $(shell [ -d '$(OUTPUT)python' ] || mkdir -p '$(OUTPUT)python') @@ -1015,7 +1023,10 @@ install-tests: all install-gtk $(INSTALL) -d -m 755 '$(DESTDIR_SQ)$(perfexec_instdir_SQ)/tests/shell'; \ $(INSTALL) tests/shell/*.sh '$(DESTDIR_SQ)$(perfexec_instdir_SQ)/tests/shell'; \ $(INSTALL) -d -m 755 '$(DESTDIR_SQ)$(perfexec_instdir_SQ)/tests/shell/lib'; \ - $(INSTALL) tests/shell/lib/*.sh '$(DESTDIR_SQ)$(perfexec_instdir_SQ)/tests/shell/lib' + $(INSTALL) tests/shell/lib/*.sh '$(DESTDIR_SQ)$(perfexec_instdir_SQ)/tests/shell/lib'; \ + $(INSTALL) -d -m 755 '$(DESTDIR_SQ)$(perfexec_instdir_SQ)/tests/shell/coresight'; \ + $(INSTALL) tests/shell/coresight/*.sh '$(DESTDIR_SQ)$(perfexec_instdir_SQ)/tests/shell/coresight' + $(Q)$(MAKE) -C tests/shell/coresight install-tests
install-bin: install-tools install-tests install-traceevent-plugins
@@ -1085,7 +1096,7 @@ endif # BUILD_BPF_SKEL bpf-skel-clean: $(call QUIET_CLEAN, bpf-skel) $(RM) -r $(SKEL_TMP_OUT) $(SKELETONS)
-clean:: $(LIBTRACEEVENT)-clean $(LIBAPI)-clean $(LIBBPF)-clean $(LIBSUBCMD)-clean $(LIBPERF)-clean fixdep-clean python-clean bpf-skel-clean +clean:: $(LIBTRACEEVENT)-clean $(LIBAPI)-clean $(LIBBPF)-clean $(LIBSUBCMD)-clean $(LIBPERF)-clean fixdep-clean python-clean bpf-skel-clean tests-coresight-targets-clean $(call QUIET_CLEAN, core-objs) $(RM) $(LIBPERF_A) $(OUTPUT)perf-archive $(OUTPUT)perf-iostat $(LANG_BINDINGS) $(Q)find $(or $(OUTPUT),.) -name '*.o' -delete -o -name '.*.cmd' -delete -o -name '.*.d' -delete $(Q)$(RM) $(OUTPUT).config-detected @@ -1143,5 +1154,6 @@ FORCE: .PHONY: shell_compatibility_test please_set_SHELL_PATH_to_a_more_modern_shell .PHONY: .FORCE-PERF-VERSION-FILE TAGS tags cscope FORCE prepare .PHONY: libtraceevent_plugins archheaders +.PHONY: $(TESTS_CORESIGHT_TARGETS)
endif # force_fixdep diff --git a/tools/perf/tests/shell/coresight/Makefile b/tools/perf/tests/shell/coresight/Makefile new file mode 100644 index 000000000000..3b816bb4ced3 --- /dev/null +++ b/tools/perf/tests/shell/coresight/Makefile @@ -0,0 +1,26 @@ +# SPDX-License-Identifier: GPL-2.0-only +# Carsten Haitzler carsten.haitzler@arm.com, 2021 +include ../../../../../tools/scripts/Makefile.include +include ../../../../../tools/scripts/Makefile.arch +include ../../../../../tools/scripts/utilities.mak + +SUBDIRS = + +all: $(SUBDIRS) +$(SUBDIRS): + $(Q)$(MAKE) -C $@ + +INSTALLDIRS = $(SUBDIRS:%=install-%) + +install-tests: $(INSTALLDIRS) +$(INSTALLDIRS): + $(Q)$(MAKE) -C $(@:install-%=%) install-tests + +CLEANDIRS = $(SUBDIRS:%=clean-%) + +clean: $(CLEANDIRS) +$(CLEANDIRS): + $(Q)$(MAKE) -C $(@:clean-%=%) clean >/dev/null + +.PHONY: all clean $(SUBDIRS) $(CLEANDIRS) $(INSTALLDIRS) + diff --git a/tools/perf/tests/shell/coresight/Makefile.miniconfig b/tools/perf/tests/shell/coresight/Makefile.miniconfig new file mode 100644 index 000000000000..a65482d769ab --- /dev/null +++ b/tools/perf/tests/shell/coresight/Makefile.miniconfig @@ -0,0 +1,24 @@ +# SPDX-License-Identifier: GPL-2.0-only +# Carsten Haitzler carsten.haitzler@arm.com, 2021 + +ifndef DESTDIR +prefix ?= $(HOME) +endif + +DESTDIR_SQ = $(subst ',''',$(DESTDIR)) +perfexecdir = libexec/perf-core +perfexec_instdir = $(perfexecdir) + +ifneq ($(filter /%,$(firstword $(perfexecdir))),) +perfexec_instdir = $(perfexecdir) +else +perfexec_instdir = $(prefix)/$(perfexecdir) +endif + +perfexec_instdir_SQ = $(subst ',''',$(perfexec_instdir)) +INSTALL = install +INSTDIR_SUB = tests/shell/coresight + +include ../../../../../scripts/Makefile.include +include ../../../../../scripts/Makefile.arch +include ../../../../../scripts/utilities.mak
From: "Carsten Haitzler (Rasterman)" raster@rasterman.com
Add test tool to be driven by further test scripts. This tool is pure arm64 ASM with no libc usage to ensure it is the same exact binary/code every time so it can also be re-used for many uses. It just loops for a given fixed number of loops.
Signed-off-by: Carsten Haitzler carsten.haitzler@arm.com --- tools/perf/tests/shell/coresight/Makefile | 3 +- .../shell/coresight/asm_pure_loop/.gitignore | 1 + .../shell/coresight/asm_pure_loop/Makefile | 34 +++++++++++++++++++ .../coresight/asm_pure_loop/asm_pure_loop.S | 28 +++++++++++++++ 4 files changed, 65 insertions(+), 1 deletion(-) create mode 100644 tools/perf/tests/shell/coresight/asm_pure_loop/.gitignore create mode 100644 tools/perf/tests/shell/coresight/asm_pure_loop/Makefile create mode 100644 tools/perf/tests/shell/coresight/asm_pure_loop/asm_pure_loop.S
diff --git a/tools/perf/tests/shell/coresight/Makefile b/tools/perf/tests/shell/coresight/Makefile index 3b816bb4ced3..d4f868d55773 100644 --- a/tools/perf/tests/shell/coresight/Makefile +++ b/tools/perf/tests/shell/coresight/Makefile @@ -4,7 +4,8 @@ include ../../../../../tools/scripts/Makefile.include include ../../../../../tools/scripts/Makefile.arch include ../../../../../tools/scripts/utilities.mak
-SUBDIRS = +SUBDIRS = \ + asm_pure_loop
all: $(SUBDIRS) $(SUBDIRS): diff --git a/tools/perf/tests/shell/coresight/asm_pure_loop/.gitignore b/tools/perf/tests/shell/coresight/asm_pure_loop/.gitignore new file mode 100644 index 000000000000..468673ac32e8 --- /dev/null +++ b/tools/perf/tests/shell/coresight/asm_pure_loop/.gitignore @@ -0,0 +1 @@ +asm_pure_loop diff --git a/tools/perf/tests/shell/coresight/asm_pure_loop/Makefile b/tools/perf/tests/shell/coresight/asm_pure_loop/Makefile new file mode 100644 index 000000000000..206849e92bc9 --- /dev/null +++ b/tools/perf/tests/shell/coresight/asm_pure_loop/Makefile @@ -0,0 +1,34 @@ +# SPDX-License-Identifier: GPL-2.0 +# Carsten Haitzler carsten.haitzler@arm.com, 2021 + +include ../Makefile.miniconfig + +# Binary to produce +BIN=asm_pure_loop +# Any linking/libraries needed for the binary - empty if none needed +LIB= + +all: $(BIN) + +$(BIN): $(BIN).S +ifdef CORESIGHT +ifeq ($(ARCH),arm64) +# Build line - this is raw asm with no libc to have an always exact binary + $(Q)$(CC) $(BIN).S -nostdlib -static -o $(BIN) $(LIB) +endif +endif + +install-tests: all +ifdef CORESIGHT +ifeq ($(ARCH),arm64) +# Install the test tool in the right place + $(call QUIET_INSTALL, tests) \ + $(INSTALL) -d -m 755 '$(DESTDIR_SQ)$(perfexec_instdir_SQ)/$(INSTDIR_SUB)/$(BIN)'; \ + $(INSTALL) $(BIN) '$(DESTDIR_SQ)$(perfexec_instdir_SQ)/$(INSTDIR_SUB)/$(BIN)/$(BIN)' +endif +endif + +clean: + $(Q)$(RM) -f $(BIN) + +.PHONY: all clean install-tests diff --git a/tools/perf/tests/shell/coresight/asm_pure_loop/asm_pure_loop.S b/tools/perf/tests/shell/coresight/asm_pure_loop/asm_pure_loop.S new file mode 100644 index 000000000000..75cf084a927d --- /dev/null +++ b/tools/perf/tests/shell/coresight/asm_pure_loop/asm_pure_loop.S @@ -0,0 +1,28 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* Tamas Zsoldos tamas.zsoldos@arm.com, 2021 */ + +.globl _start +_start: + mov x0, 0x0000ffff + mov x1, xzr +loop: + nop + nop + cbnz x1, noskip + nop + nop + adrp x2, skip + add x2, x2, :lo12:skip + br x2 + nop + nop +noskip: + nop + nop +skip: + sub x0, x0, 1 + cbnz x0, loop + + mov x0, #0 + mov x8, #93 // __NR_exit syscall + svc #0
From: "Carsten Haitzler (Rasterman)" raster@rasterman.com
Add a script to drive the asm pureloop test for arm64/CoreSight that gathers data so it passes a minimum bar for amount and quality of content that we extract from the kernel's perf support.
Signed-off-by: Carsten Haitzler carsten.haitzler@arm.com --- .../tests/shell/coresight/asm_pure_loop.sh | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) create mode 100755 tools/perf/tests/shell/coresight/asm_pure_loop.sh
diff --git a/tools/perf/tests/shell/coresight/asm_pure_loop.sh b/tools/perf/tests/shell/coresight/asm_pure_loop.sh new file mode 100755 index 000000000000..569e9d46162b --- /dev/null +++ b/tools/perf/tests/shell/coresight/asm_pure_loop.sh @@ -0,0 +1,18 @@ +#!/bin/sh -e +# CoreSight / ASM Pure Loop + +# SPDX-License-Identifier: GPL-2.0 +# Carsten Haitzler carsten.haitzler@arm.com, 2021 + +TEST="asm_pure_loop" +. $(dirname $0)/../lib/coresight.sh +ARGS="" +DATV="out" +DATA="$DATD/perf-$TEST-$DATV.data" + +perf record $PERFRECOPT -o "$DATA" "$BIN" $ARGS + +perf_dump_aux_verify "$DATA" 10 10 10 + +err=$? +exit $err
From: "Carsten Haitzler (Rasterman)" raster@rasterman.com
Ignore perf output data files generated by perf tests for cleaner git status.
Signed-off-by: Carsten Haitzler carsten.haitzler@arm.com --- tools/perf/.gitignore | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/tools/perf/.gitignore b/tools/perf/.gitignore index 4b9c71faa01a..faa23b5d32f5 100644 --- a/tools/perf/.gitignore +++ b/tools/perf/.gitignore @@ -15,8 +15,8 @@ perf*.1 perf*.xml perf*.html common-cmds.h -perf.data -perf.data.old +perf*.data +perf*.data.old output.svg perf-archive perf-iostat
From: "Carsten Haitzler (Rasterman)" raster@rasterman.com
Add test tool to be driven by further test scripts. This is a simple C based memcpy with threads test to drive from scripts.
Signed-off-by: Carsten Haitzler carsten.haitzler@arm.com --- tools/perf/tests/shell/coresight/Makefile | 3 +- .../shell/coresight/memcpy_thread/.gitignore | 1 + .../shell/coresight/memcpy_thread/Makefile | 33 ++++++++ .../coresight/memcpy_thread/memcpy_thread.c | 79 +++++++++++++++++++ 4 files changed, 115 insertions(+), 1 deletion(-) create mode 100644 tools/perf/tests/shell/coresight/memcpy_thread/.gitignore create mode 100644 tools/perf/tests/shell/coresight/memcpy_thread/Makefile create mode 100644 tools/perf/tests/shell/coresight/memcpy_thread/memcpy_thread.c
diff --git a/tools/perf/tests/shell/coresight/Makefile b/tools/perf/tests/shell/coresight/Makefile index d4f868d55773..561c807022ec 100644 --- a/tools/perf/tests/shell/coresight/Makefile +++ b/tools/perf/tests/shell/coresight/Makefile @@ -5,7 +5,8 @@ include ../../../../../tools/scripts/Makefile.arch include ../../../../../tools/scripts/utilities.mak
SUBDIRS = \ - asm_pure_loop + asm_pure_loop \ + memcpy_thread
all: $(SUBDIRS) $(SUBDIRS): diff --git a/tools/perf/tests/shell/coresight/memcpy_thread/.gitignore b/tools/perf/tests/shell/coresight/memcpy_thread/.gitignore new file mode 100644 index 000000000000..f8217e56091e --- /dev/null +++ b/tools/perf/tests/shell/coresight/memcpy_thread/.gitignore @@ -0,0 +1 @@ +memcpy_thread diff --git a/tools/perf/tests/shell/coresight/memcpy_thread/Makefile b/tools/perf/tests/shell/coresight/memcpy_thread/Makefile new file mode 100644 index 000000000000..2db637eb2c26 --- /dev/null +++ b/tools/perf/tests/shell/coresight/memcpy_thread/Makefile @@ -0,0 +1,33 @@ +# SPDX-License-Identifier: GPL-2.0 +# Carsten Haitzler carsten.haitzler@arm.com, 2021 +include ../Makefile.miniconfig + +# Binary to produce +BIN=memcpy_thread +# Any linking/libraries needed for the binary - empty if none needed +LIB=-pthread + +all: $(BIN) + +$(BIN): $(BIN).c +ifdef CORESIGHT +ifeq ($(ARCH),arm64) +# Build line + $(Q)$(CC) $(BIN).c -o $(BIN) $(LIB) +endif +endif + +install-tests: all +ifdef CORESIGHT +ifeq ($(ARCH),arm64) +# Install the test tool in the right place + $(call QUIET_INSTALL, tests) \ + $(INSTALL) -d -m 755 '$(DESTDIR_SQ)$(perfexec_instdir_SQ)/$(INSTDIR_SUB)/$(BIN)'; \ + $(INSTALL) $(BIN) '$(DESTDIR_SQ)$(perfexec_instdir_SQ)/$(INSTDIR_SUB)/$(BIN)/$(BIN)' +endif +endif + +clean: + $(Q)$(RM) -f $(BIN) + +.PHONY: all clean install-tests diff --git a/tools/perf/tests/shell/coresight/memcpy_thread/memcpy_thread.c b/tools/perf/tests/shell/coresight/memcpy_thread/memcpy_thread.c new file mode 100644 index 000000000000..a7e169d1bf64 --- /dev/null +++ b/tools/perf/tests/shell/coresight/memcpy_thread/memcpy_thread.c @@ -0,0 +1,79 @@ +// SPDX-License-Identifier: GPL-2.0 +// Carsten Haitzler carsten.haitzler@arm.com, 2021 +#include <stdio.h> +#include <stdlib.h> +#include <unistd.h> +#include <string.h> +#include <pthread.h> + +struct args { + unsigned long loops; + unsigned long size; + pthread_t th; + void *ret; +}; + +static void *thrfn(void *arg) +{ + struct args *a = arg; + unsigned long i, len = a->loops; + unsigned char *src, *dst; + + src = malloc(a->size * 1024); + dst = malloc(a->size * 1024); + if ((!src) || (!dst)) { + printf("ERR: Can't allocate memory\n"); + exit(1); + } + for (i = 0; i < len; i++) + memcpy(dst, src, a->size * 1024); +} + +static pthread_t new_thr(void *(*fn) (void *arg), void *arg) +{ + pthread_t t; + pthread_attr_t attr; + + pthread_attr_init(&attr); + pthread_create(&t, &attr, fn, arg); + return t; +} + +int main(int argc, char **argv) +{ + unsigned long i, len, size, thr; + pthread_t threads[256]; + struct args args[256]; + long long v; + + if (argc < 4) { + printf("ERR: %s [copysize Kb] [numthreads] [numloops (hundreds)]\n", argv[0]); + exit(1); + } + + v = atoll(argv[1]); + if ((v < 1) || (v > (1024 * 1024))) { + printf("ERR: max memory 1GB (1048576 KB)\n"); + exit(1); + } + size = v; + thr = atol(argv[2]); + if ((thr < 1) || (thr > 256)) { + printf("ERR: threads 1-256\n"); + exit(1); + } + v = atoll(argv[3]); + if ((v < 1) || (v > 40000000000ll)) { + printf("ERR: loops 1-40000000000 (hundreds)\n"); + exit(1); + } + len = v * 100; + for (i = 0; i < thr; i++) { + args[i].loops = len; + args[i].size = size; + args[i].th = new_thr(thrfn, &(args[i])); + } + for (i = 0; i < thr; i++) + pthread_join(args[i].th, &(args[i].ret)); + return 0; +}
From: "Carsten Haitzler (Rasterman)" raster@rasterman.com
Add a script to drive the threaded memcpy test that gathers data so it passes a minimum bar for amount and quality of content that we extract from the kernel's perf support.
Signed-off-by: Carsten Haitzler carsten.haitzler@arm.com --- .../shell/coresight/memcpy_thread_16k_10.sh | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) create mode 100755 tools/perf/tests/shell/coresight/memcpy_thread_16k_10.sh
diff --git a/tools/perf/tests/shell/coresight/memcpy_thread_16k_10.sh b/tools/perf/tests/shell/coresight/memcpy_thread_16k_10.sh new file mode 100755 index 000000000000..d21ba8545938 --- /dev/null +++ b/tools/perf/tests/shell/coresight/memcpy_thread_16k_10.sh @@ -0,0 +1,18 @@ +#!/bin/sh -e +# CoreSight / Memcpy 16k 10 Threads + +# SPDX-License-Identifier: GPL-2.0 +# Carsten Haitzler carsten.haitzler@arm.com, 2021 + +TEST="memcpy_thread" +. $(dirname $0)/../lib/coresight.sh +ARGS="16 10 1" +DATV="16k_10" +DATA="$DATD/perf-$TEST-$DATV.data" + +perf record $PERFRECOPT -o "$DATA" "$BIN" $ARGS + +perf_dump_aux_verify "$DATA" 10 10 10 + +err=$? +exit $err
On 01/07/2022 13:07, carsten.haitzler@foss.arm.com wrote:
From: "Carsten Haitzler (Rasterman)" raster@rasterman.com
Add a script to drive the threaded memcpy test that gathers data so it passes a minimum bar for amount and quality of content that we extract from the kernel's perf support.
On this one I get a failure about 1/50 times on N1SDP (I ran it about 150 times and saw 3 failures so it's quite consistent). Usually it records about a 1.4MB file with one aux record. But when it fails the file is only 20K and has one small aux record:
0 0 0x1a10 [0x30]: PERF_RECORD_AUXTRACE size: 0x1820 offset: 0 ref: 0x1c23126d7ff3d2ab idx: 3 tid: 682799 cpu: 3
Nothing was dropped, and the load on the system wasn't any different to when it passes. So I'm not sure if this is a real coresight bug or that the test is flaky. There was a bug in SPE before where threads weren't followed after forking, but only very rarely. It feels a bit like that.
It could also be some contention issue because 10 threads are launched but the machine only has 4 cores.
The failure message from the test looks like this:
77: CoreSight / Memcpy 16k 10 Threads : --- start --- Couldn't synthesize bpf events. [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 0.012 MB ./perf-memcpy_thread-16k_10.data ] Sanity check number of ASYNC is too low (3 < 10) ---- end ---- CoreSight / Memcpy 16k 10 Threads: FAILED!
I didn't see this issue on any of the other tests. Sometimes very small files were made if I loaded the system, but the tests still passed.
Thanks James
Signed-off-by: Carsten Haitzler carsten.haitzler@arm.com
.../shell/coresight/memcpy_thread_16k_10.sh | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) create mode 100755 tools/perf/tests/shell/coresight/memcpy_thread_16k_10.sh
diff --git a/tools/perf/tests/shell/coresight/memcpy_thread_16k_10.sh b/tools/perf/tests/shell/coresight/memcpy_thread_16k_10.sh new file mode 100755 index 000000000000..d21ba8545938 --- /dev/null +++ b/tools/perf/tests/shell/coresight/memcpy_thread_16k_10.sh @@ -0,0 +1,18 @@ +#!/bin/sh -e +# CoreSight / Memcpy 16k 10 Threads
+# SPDX-License-Identifier: GPL-2.0 +# Carsten Haitzler carsten.haitzler@arm.com, 2021
+TEST="memcpy_thread" +. $(dirname $0)/../lib/coresight.sh +ARGS="16 10 1" +DATV="16k_10" +DATA="$DATD/perf-$TEST-$DATV.data"
+perf record $PERFRECOPT -o "$DATA" "$BIN" $ARGS
+perf_dump_aux_verify "$DATA" 10 10 10
+err=$? +exit $err
On 05/07/2022 15:25, James Clark wrote:
On 01/07/2022 13:07, carsten.haitzler@foss.arm.com wrote:
From: "Carsten Haitzler (Rasterman)" raster@rasterman.com
Add a script to drive the threaded memcpy test that gathers data so it passes a minimum bar for amount and quality of content that we extract from the kernel's perf support.
On this one I get a failure about 1/50 times on N1SDP (I ran it about 150 times and saw 3 failures so it's quite consistent). Usually it records about a 1.4MB file with one aux record. But when it fails the file is only 20K and has one small aux record:
0 0 0x1a10 [0x30]: PERF_RECORD_AUXTRACE size: 0x1820 offset: 0 ref: 0x1c23126d7ff3d2ab idx: 3 tid: 682799 cpu: 3
Nothing was dropped, and the load on the system wasn't any different to when it passes. So I'm not sure if this is a real coresight bug or that the test is flaky. There was a bug in SPE before where threads weren't followed after forking, but only very rarely. It feels a bit like that.
It could also be some contention issue because 10 threads are launched but the machine only has 4 cores.
The failure message from the test looks like this:
77: CoreSight / Memcpy 16k 10 Threads : --- start --- Couldn't synthesize bpf events. [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 0.012 MB ./perf-memcpy_thread-16k_10.data ] Sanity check number of ASYNC is too low (3 < 10) ---- end ---- CoreSight / Memcpy 16k 10 Threads: FAILED!
I didn't see this issue on any of the other tests. Sometimes very small files were made if I loaded the system, but the tests still passed.
Spoke too soon, same thing on another test with an unloaded system. It's just a bit more rare:
80: CoreSight / Unroll Loop Thread 10 : --- start --- Couldn't synthesize bpf events. [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 0.041 MB ./perf-unroll_loop_thread-10.data ] Sanity check number of ASYNC is too low (6 < 10) ---- end ---- CoreSight / Unroll Loop Thread 10: FAILED!
Thanks James
Signed-off-by: Carsten Haitzler carsten.haitzler@arm.com
.../shell/coresight/memcpy_thread_16k_10.sh | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) create mode 100755 tools/perf/tests/shell/coresight/memcpy_thread_16k_10.sh
diff --git a/tools/perf/tests/shell/coresight/memcpy_thread_16k_10.sh b/tools/perf/tests/shell/coresight/memcpy_thread_16k_10.sh new file mode 100755 index 000000000000..d21ba8545938 --- /dev/null +++ b/tools/perf/tests/shell/coresight/memcpy_thread_16k_10.sh @@ -0,0 +1,18 @@ +#!/bin/sh -e +# CoreSight / Memcpy 16k 10 Threads
+# SPDX-License-Identifier: GPL-2.0 +# Carsten Haitzler carsten.haitzler@arm.com, 2021
+TEST="memcpy_thread" +. $(dirname $0)/../lib/coresight.sh +ARGS="16 10 1" +DATV="16k_10" +DATA="$DATD/perf-$TEST-$DATV.data"
+perf record $PERFRECOPT -o "$DATA" "$BIN" $ARGS
+perf_dump_aux_verify "$DATA" 10 10 10
+err=$? +exit $err
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On 7/5/22 15:25, James Clark wrote:
On 01/07/2022 13:07, carsten.haitzler@foss.arm.com wrote:
From: "Carsten Haitzler (Rasterman)" raster@rasterman.com
Add a script to drive the threaded memcpy test that gathers data so it passes a minimum bar for amount and quality of content that we extract from the kernel's perf support.
On this one I get a failure about 1/50 times on N1SDP (I ran it about 150
I also see inconsistent results. The whole point of these tests is to point this out and provide data to track it and then lead eventually to improvements/fixes. A failing test is probably good - it found a problem. Perf test for me has lots of failures so I'm taking the position that failures are OK normally in perf test as long as you know what those failures are and why.
times and saw 3 failures so it's quite consistent). Usually it records about a 1.4MB file with one aux record. But when it fails the file is only 20K and has one small aux record:
0 0 0x1a10 [0x30]: PERF_RECORD_AUXTRACE size: 0x1820 offset: 0 ref: 0x1c23126d7ff3d2ab idx: 3 tid: 682799 cpu: 3
Nothing was dropped, and the load on the system wasn't any different to when it passes. So I'm not sure if this is a real coresight bug or that the test is flaky. There was a bug in SPE before where
The binary is the same with the same content running the same perf command every time. Workload doesn't change. The perf data captured does change. It sometimes captures so little it fails even the low pass bar given in the test.
threads weren't followed after forking, but only very rarely. It feels a bit like that.
That ... would be a "CoreSight" bug though I think, not the test.
It could also be some contention issue because 10 threads are launched but the machine only has 4 cores.
We still should be capturing data reliably (in theory). If you have 10 threads on a 4 core machine it'll take longer to run for the same workload as the threads will have to share the same cores, but this should still result in decent data collection as the cores switch between threads. That's the point.
The failure message from the test looks like this:
77: CoreSight / Memcpy 16k 10 Threads : --- start --- Couldn't synthesize bpf events. [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 0.012 MB ./perf-memcpy_thread-16k_10.data ] Sanity check number of ASYNC is too low (3 < 10) ---- end ---- CoreSight / Memcpy 16k 10 Threads: FAILED!
I didn't see this issue on any of the other tests. Sometimes very small files were made if I loaded the system, but the tests still passed.
For me the "Check TID" tests fails very often... but as I said - the point here is to find issues and ensure they are reported in results. The test even track the results over time/many runs in the csv files so you get a good idea of consistency and even how it may statistically change over time matching that up to changes in the kernel.
Unless of course you think it's acceptable that sometimes perf record + CoreSight will output essentially no data (your 20k example). :)
Thanks James
Signed-off-by: Carsten Haitzler carsten.haitzler@arm.com
.../shell/coresight/memcpy_thread_16k_10.sh | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) create mode 100755 tools/perf/tests/shell/coresight/memcpy_thread_16k_10.sh
diff --git a/tools/perf/tests/shell/coresight/memcpy_thread_16k_10.sh b/tools/perf/tests/shell/coresight/memcpy_thread_16k_10.sh new file mode 100755 index 000000000000..d21ba8545938 --- /dev/null +++ b/tools/perf/tests/shell/coresight/memcpy_thread_16k_10.sh @@ -0,0 +1,18 @@ +#!/bin/sh -e +# CoreSight / Memcpy 16k 10 Threads
+# SPDX-License-Identifier: GPL-2.0 +# Carsten Haitzler carsten.haitzler@arm.com, 2021
+TEST="memcpy_thread" +. $(dirname $0)/../lib/coresight.sh +ARGS="16 10 1" +DATV="16k_10" +DATA="$DATD/perf-$TEST-$DATV.data"
+perf record $PERFRECOPT -o "$DATA" "$BIN" $ARGS
+perf_dump_aux_verify "$DATA" 10 10 10
+err=$? +exit $err
From: "Carsten Haitzler (Rasterman)" raster@rasterman.com
Add test tool to be driven by further test scripts. This is a simple C based loop with threads test to drive from scripts that can output TIDs for tracking/checking.
Signed-off-by: Carsten Haitzler carsten.haitzler@arm.com --- tools/perf/tests/shell/coresight/Makefile | 3 +- .../shell/coresight/thread_loop/.gitignore | 1 + .../shell/coresight/thread_loop/Makefile | 33 +++++++ .../shell/coresight/thread_loop/thread_loop.c | 86 +++++++++++++++++++ 4 files changed, 122 insertions(+), 1 deletion(-) create mode 100644 tools/perf/tests/shell/coresight/thread_loop/.gitignore create mode 100644 tools/perf/tests/shell/coresight/thread_loop/Makefile create mode 100644 tools/perf/tests/shell/coresight/thread_loop/thread_loop.c
diff --git a/tools/perf/tests/shell/coresight/Makefile b/tools/perf/tests/shell/coresight/Makefile index 561c807022ec..004974a71fb8 100644 --- a/tools/perf/tests/shell/coresight/Makefile +++ b/tools/perf/tests/shell/coresight/Makefile @@ -6,7 +6,8 @@ include ../../../../../tools/scripts/utilities.mak
SUBDIRS = \ asm_pure_loop \ - memcpy_thread + memcpy_thread \ + thread_loop
all: $(SUBDIRS) $(SUBDIRS): diff --git a/tools/perf/tests/shell/coresight/thread_loop/.gitignore b/tools/perf/tests/shell/coresight/thread_loop/.gitignore new file mode 100644 index 000000000000..6d4c33eaa9e8 --- /dev/null +++ b/tools/perf/tests/shell/coresight/thread_loop/.gitignore @@ -0,0 +1 @@ +thread_loop diff --git a/tools/perf/tests/shell/coresight/thread_loop/Makefile b/tools/perf/tests/shell/coresight/thread_loop/Makefile new file mode 100644 index 000000000000..ea846c038e7a --- /dev/null +++ b/tools/perf/tests/shell/coresight/thread_loop/Makefile @@ -0,0 +1,33 @@ +# SPDX-License-Identifier: GPL-2.0 +# Carsten Haitzler carsten.haitzler@arm.com, 2021 +include ../Makefile.miniconfig + +# Binary to produce +BIN=thread_loop +# Any linking/libraries needed for the binary - empty if none needed +LIB=-pthread + +all: $(BIN) + +$(BIN): $(BIN).c +ifdef CORESIGHT +ifeq ($(ARCH),arm64) +# Build line + $(Q)$(CC) $(BIN).c -o $(BIN) $(LIB) +endif +endif + +install-tests: all +ifdef CORESIGHT +ifeq ($(ARCH),arm64) +# Install the test tool in the right place + $(call QUIET_INSTALL, tests) \ + $(INSTALL) -d -m 755 '$(DESTDIR_SQ)$(perfexec_instdir_SQ)/$(INSTDIR_SUB)/$(BIN)'; \ + $(INSTALL) $(BIN) '$(DESTDIR_SQ)$(perfexec_instdir_SQ)/$(INSTDIR_SUB)/$(BIN)/$(BIN)' +endif +endif + +clean: + $(Q)$(RM) -f $(BIN) + +.PHONY: all clean install-tests diff --git a/tools/perf/tests/shell/coresight/thread_loop/thread_loop.c b/tools/perf/tests/shell/coresight/thread_loop/thread_loop.c new file mode 100644 index 000000000000..c0158fac7d0b --- /dev/null +++ b/tools/perf/tests/shell/coresight/thread_loop/thread_loop.c @@ -0,0 +1,86 @@ +// SPDX-License-Identifier: GPL-2.0 +// Carsten Haitzler carsten.haitzler@arm.com, 2021 + +// define this for gettid() +#define _GNU_SOURCE + +#include <stdio.h> +#include <stdlib.h> +#include <unistd.h> +#include <string.h> +#include <pthread.h> +#include <sys/syscall.h> +#ifndef SYS_gettid +// gettid is 178 on arm64 +# define SYS_gettid 178 +#endif +#define gettid() syscall(SYS_gettid) + +struct args { + unsigned int loops; + pthread_t th; + void *ret; +}; + +static void *thrfn(void *arg) +{ + struct args *a = arg; + int i = 0, len = a->loops; + + if (getenv("SHOW_TID")) { + unsigned long long tid = gettid(); + + printf("%llu\n", tid); + } + asm volatile( + "loop:\n" + "add %[i], %[i], #1\n" + "cmp %[i], %[len]\n" + "blt loop\n" + : /* out */ + : /* in */ [i] "r" (i), [len] "r" (len) + : /* clobber */ + ); + return (void *)(long)i; +} + +static pthread_t new_thr(void *(*fn) (void *arg), void *arg) +{ + pthread_t t; + pthread_attr_t attr; + + pthread_attr_init(&attr); + pthread_create(&t, &attr, fn, arg); + return t; +} + +int main(int argc, char **argv) +{ + unsigned int i, len, thr; + pthread_t threads[256]; + struct args args[256]; + + if (argc < 3) { + printf("ERR: %s [numthreads] [numloops (millions)]\n", argv[0]); + exit(1); + } + + thr = atoi(argv[1]); + if ((thr < 1) || (thr > 256)) { + printf("ERR: threads 1-256\n"); + exit(1); + } + len = atoi(argv[2]); + if ((len < 1) || (len > 4000)) { + printf("ERR: max loops 4000 (millions)\n"); + exit(1); + } + len *= 1000000; + for (i = 0; i < thr; i++) { + args[i].loops = len; + args[i].th = new_thr(thrfn, &(args[i])); + } + for (i = 0; i < thr; i++) + pthread_join(args[i].th, &(args[i].ret)); + return 0; +}
From: "Carsten Haitzler (Rasterman)" raster@rasterman.com
Add a script to drive the thread loop test that gathers data so it passes a minimum bar (in this case do we get any perf context data for every thread).
Signed-off-by: Carsten Haitzler carsten.haitzler@arm.com --- .../coresight/thread_loop_check_tid_10.sh | 19 +++++++++++++++++++ .../coresight/thread_loop_check_tid_2.sh | 19 +++++++++++++++++++ 2 files changed, 38 insertions(+) create mode 100755 tools/perf/tests/shell/coresight/thread_loop_check_tid_10.sh create mode 100755 tools/perf/tests/shell/coresight/thread_loop_check_tid_2.sh
diff --git a/tools/perf/tests/shell/coresight/thread_loop_check_tid_10.sh b/tools/perf/tests/shell/coresight/thread_loop_check_tid_10.sh new file mode 100755 index 000000000000..7c13636fc778 --- /dev/null +++ b/tools/perf/tests/shell/coresight/thread_loop_check_tid_10.sh @@ -0,0 +1,19 @@ +#!/bin/sh -e +# CoreSight / Thread Loop 10 Threads - Check TID + +# SPDX-License-Identifier: GPL-2.0 +# Carsten Haitzler carsten.haitzler@arm.com, 2021 + +TEST="thread_loop" +. $(dirname $0)/../lib/coresight.sh +ARGS="10 1" +DATV="check-tid-10th" +DATA="$DATD/perf-$TEST-$DATV.data" +STDO="$DATD/perf-$TEST-$DATV.stdout" + +SHOW_TID=1 perf record -s $PERFRECOPT -o "$DATA" "$BIN" $ARGS > $STDO + +perf_dump_aux_tid_verify "$DATA" "$STDO" + +err=$? +exit $err diff --git a/tools/perf/tests/shell/coresight/thread_loop_check_tid_2.sh b/tools/perf/tests/shell/coresight/thread_loop_check_tid_2.sh new file mode 100755 index 000000000000..a067145af43c --- /dev/null +++ b/tools/perf/tests/shell/coresight/thread_loop_check_tid_2.sh @@ -0,0 +1,19 @@ +#!/bin/sh -e +# CoreSight / Thread Loop 2 Threads - Check TID + +# SPDX-License-Identifier: GPL-2.0 +# Carsten Haitzler carsten.haitzler@arm.com, 2021 + +TEST="thread_loop" +. $(dirname $0)/../lib/coresight.sh +ARGS="2 20" +DATV="check-tid-2th" +DATA="$DATD/perf-$TEST-$DATV.data" +STDO="$DATD/perf-$TEST-$DATV.stdout" + +SHOW_TID=1 perf record -s $PERFRECOPT -o "$DATA" "$BIN" $ARGS > $STDO + +perf_dump_aux_tid_verify "$DATA" "$STDO" + +err=$? +exit $err
On 01/07/2022 13:07, carsten.haitzler@foss.arm.com wrote:
From: "Carsten Haitzler (Rasterman)" raster@rasterman.com
Add a script to drive the thread loop test that gathers data so it passes a minimum bar (in this case do we get any perf context data for every thread).
Signed-off-by: Carsten Haitzler carsten.haitzler@arm.com
Hi Carsten,
I checked this on N1SDP and I get failures in both threads tests. This is because it's looking for "CID=..." when in my output threads are shown as "VMID=...":
Idx:628048; ID:10; I_ADDR_CTXT_L_64IS0 : Address & Context, Long, 64 bit, IS0.; Addr=0x0000AAAAE3BF0B18; Ctxt: AArch64,EL0, NS; VMID=0xa588c;
I think with a change to the grep it should work.
Thanks James
.../coresight/thread_loop_check_tid_10.sh | 19 +++++++++++++++++++ .../coresight/thread_loop_check_tid_2.sh | 19 +++++++++++++++++++ 2 files changed, 38 insertions(+) create mode 100755 tools/perf/tests/shell/coresight/thread_loop_check_tid_10.sh create mode 100755 tools/perf/tests/shell/coresight/thread_loop_check_tid_2.sh
diff --git a/tools/perf/tests/shell/coresight/thread_loop_check_tid_10.sh b/tools/perf/tests/shell/coresight/thread_loop_check_tid_10.sh new file mode 100755 index 000000000000..7c13636fc778 --- /dev/null +++ b/tools/perf/tests/shell/coresight/thread_loop_check_tid_10.sh @@ -0,0 +1,19 @@ +#!/bin/sh -e +# CoreSight / Thread Loop 10 Threads - Check TID
+# SPDX-License-Identifier: GPL-2.0 +# Carsten Haitzler carsten.haitzler@arm.com, 2021
+TEST="thread_loop" +. $(dirname $0)/../lib/coresight.sh +ARGS="10 1" +DATV="check-tid-10th" +DATA="$DATD/perf-$TEST-$DATV.data" +STDO="$DATD/perf-$TEST-$DATV.stdout"
+SHOW_TID=1 perf record -s $PERFRECOPT -o "$DATA" "$BIN" $ARGS > $STDO
+perf_dump_aux_tid_verify "$DATA" "$STDO"
+err=$? +exit $err diff --git a/tools/perf/tests/shell/coresight/thread_loop_check_tid_2.sh b/tools/perf/tests/shell/coresight/thread_loop_check_tid_2.sh new file mode 100755 index 000000000000..a067145af43c --- /dev/null +++ b/tools/perf/tests/shell/coresight/thread_loop_check_tid_2.sh @@ -0,0 +1,19 @@ +#!/bin/sh -e +# CoreSight / Thread Loop 2 Threads - Check TID
+# SPDX-License-Identifier: GPL-2.0 +# Carsten Haitzler carsten.haitzler@arm.com, 2021
+TEST="thread_loop" +. $(dirname $0)/../lib/coresight.sh +ARGS="2 20" +DATV="check-tid-2th" +DATA="$DATD/perf-$TEST-$DATV.data" +STDO="$DATD/perf-$TEST-$DATV.stdout"
+SHOW_TID=1 perf record -s $PERFRECOPT -o "$DATA" "$BIN" $ARGS > $STDO
+perf_dump_aux_tid_verify "$DATA" "$STDO"
+err=$? +exit $err
On 7/5/22 14:53, James Clark wrote:
On 01/07/2022 13:07, carsten.haitzler@foss.arm.com wrote:
From: "Carsten Haitzler (Rasterman)" raster@rasterman.com
Add a script to drive the thread loop test that gathers data so it passes a minimum bar (in this case do we get any perf context data for every thread).
Signed-off-by: Carsten Haitzler carsten.haitzler@arm.com
Hi Carsten,
I checked this on N1SDP and I get failures in both threads tests. This is because it's looking for "CID=..." when in my output threads are shown as "VMID=...":
Idx:628048; ID:10; I_ADDR_CTXT_L_64IS0 : Address & Context, Long, 64 bit, IS0.; Addr=0x0000AAAAE3BF0B18; Ctxt: AArch64,EL0, NS; VMID=0xa588c;
I think with a change to the grep it should work.
Errrr... I get no VMID= ... it's all
Idx:563008; ID:12; I_ADDR_CTXT_L_64IS0 : Address & Context, Long, 64 bit, IS0.; Addr=0x0000AAAAE4B00A60; Ctxt: AArch64,EL0, NS; CID=0x00004aff;
are you using containers or something? because:
if(context.updated_c) { oss << "CID=0x" << std::hex << std::setfill('0') << std::setw(8) << context.ctxtID << "; "; } if(context.updated_v) { oss << "VMID=0x" << std::hex << std::setfill('0') << std::setw(4) << context.VMID << "; "; }
I'm running without any containers etc. - bare metal. Haven't bothered with any VM stuff.
In OpenOCD the CID should be the the pid/thread id. It seems to not be the same thing as VMID. I haven't traced this beyond here as to exactly what this represents though my first reaction is "This is extra VM info and not the PID/TID being looked for". OpenOCD is full of tests with log dumps that produce CID and VMID:
Idx:1676; ID:10; I_ADDR_CTXT_L_64IS0 : Address & Context, Long, 64 bit, IS0.; Addr=0xFFFFFFC000096A00; Ctxt: AArch64,EL1, NS; CID=0x00000000; VMID=0x0000;
A quick git grep CID= in OpenCD will show them all. My understanding is CID is the thread/process ID and thus the test/check "Do we get reported data from all threads? - anything?".
I don't think using VMID is right. The fact you are missing a CID is an issue though...
Thanks James
.../coresight/thread_loop_check_tid_10.sh | 19 +++++++++++++++++++ .../coresight/thread_loop_check_tid_2.sh | 19 +++++++++++++++++++ 2 files changed, 38 insertions(+) create mode 100755 tools/perf/tests/shell/coresight/thread_loop_check_tid_10.sh create mode 100755 tools/perf/tests/shell/coresight/thread_loop_check_tid_2.sh
diff --git a/tools/perf/tests/shell/coresight/thread_loop_check_tid_10.sh b/tools/perf/tests/shell/coresight/thread_loop_check_tid_10.sh new file mode 100755 index 000000000000..7c13636fc778 --- /dev/null +++ b/tools/perf/tests/shell/coresight/thread_loop_check_tid_10.sh @@ -0,0 +1,19 @@ +#!/bin/sh -e +# CoreSight / Thread Loop 10 Threads - Check TID
+# SPDX-License-Identifier: GPL-2.0 +# Carsten Haitzler carsten.haitzler@arm.com, 2021
+TEST="thread_loop" +. $(dirname $0)/../lib/coresight.sh +ARGS="10 1" +DATV="check-tid-10th" +DATA="$DATD/perf-$TEST-$DATV.data" +STDO="$DATD/perf-$TEST-$DATV.stdout"
+SHOW_TID=1 perf record -s $PERFRECOPT -o "$DATA" "$BIN" $ARGS > $STDO
+perf_dump_aux_tid_verify "$DATA" "$STDO"
+err=$? +exit $err diff --git a/tools/perf/tests/shell/coresight/thread_loop_check_tid_2.sh b/tools/perf/tests/shell/coresight/thread_loop_check_tid_2.sh new file mode 100755 index 000000000000..a067145af43c --- /dev/null +++ b/tools/perf/tests/shell/coresight/thread_loop_check_tid_2.sh @@ -0,0 +1,19 @@ +#!/bin/sh -e +# CoreSight / Thread Loop 2 Threads - Check TID
+# SPDX-License-Identifier: GPL-2.0 +# Carsten Haitzler carsten.haitzler@arm.com, 2021
+TEST="thread_loop" +. $(dirname $0)/../lib/coresight.sh +ARGS="2 20" +DATV="check-tid-2th" +DATA="$DATD/perf-$TEST-$DATV.data" +STDO="$DATD/perf-$TEST-$DATV.stdout"
+SHOW_TID=1 perf record -s $PERFRECOPT -o "$DATA" "$BIN" $ARGS > $STDO
+perf_dump_aux_tid_verify "$DATA" "$STDO"
+err=$? +exit $err
Hi,
On Fri, 8 Jul 2022 at 10:22, Carsten Haitzler carsten.haitzler@foss.arm.com wrote:
On 7/5/22 14:53, James Clark wrote:
On 01/07/2022 13:07, carsten.haitzler@foss.arm.com wrote:
From: "Carsten Haitzler (Rasterman)" raster@rasterman.com
Add a script to drive the thread loop test that gathers data so it passes a minimum bar (in this case do we get any perf context data for every thread).
Signed-off-by: Carsten Haitzler carsten.haitzler@arm.com
Hi Carsten,
I checked this on N1SDP and I get failures in both threads tests. This is because it's looking for "CID=..." when in my output threads are shown as "VMID=...":
Idx:628048; ID:10; I_ADDR_CTXT_L_64IS0 : Address & Context, Long, 64 bit, IS0.; Addr=0x0000AAAAE3BF0B18; Ctxt: AArch64,EL0, NS; VMID=0xa588c;
I think with a change to the grep it should work.
Errrr... I get no VMID= ... it's all
Idx:563008; ID:12; I_ADDR_CTXT_L_64IS0 : Address & Context, Long, 64 bit, IS0.; Addr=0x0000AAAAE4B00A60; Ctxt: AArch64,EL0, NS; CID=0x00004aff;
are you using containers or something? because:
if(context.updated_c) { oss << "CID=0x" << std::hex << std::setfill('0') <<
std::setw(8) << context.ctxtID << "; "; } if(context.updated_v) { oss << "VMID=0x" << std::hex << std::setfill('0') << std::setw(4) << context.VMID << "; "; }
I'm running without any containers etc. - bare metal. Haven't bothered with any VM stuff.
In OpenOCD the CID should be the the pid/thread id. It seems to not be the same thing as VMID. I haven't traced this beyond here as to exactly what this represents though my first reaction is "This is extra VM info and not the PID/TID being looked for". OpenOCD is full of tests with log dumps that produce CID and VMID:
Idx:1676; ID:10; I_ADDR_CTXT_L_64IS0 : Address & Context, Long, 64 bit, IS0.; Addr=0xFFFFFFC000096A00; Ctxt: AArch64,EL1, NS; CID=0x00000000; VMID=0x0000;
A quick git grep CID= in OpenCD will show them all. My understanding is CID is the thread/process ID and thus the test/check "Do we get reported data from all threads? - anything?".
I don't think using VMID is right. The fact you are missing a CID is an issue though...
The register used for linux TID trace is dependent on the EL of the kernel. EL1 => CONTEXT_IDR_EL1 EL2 => CONTEXT_IDR_EL2.
By design, the trace hardware traces CONTEXT_IDR_EL2 as the VMID packet.
So, depending on your kernel build, TID can validly be traced as CID or VMID
Regards
Mike
Thanks James
.../coresight/thread_loop_check_tid_10.sh | 19 +++++++++++++++++++ .../coresight/thread_loop_check_tid_2.sh | 19 +++++++++++++++++++ 2 files changed, 38 insertions(+) create mode 100755 tools/perf/tests/shell/coresight/thread_loop_check_tid_10.sh create mode 100755 tools/perf/tests/shell/coresight/thread_loop_check_tid_2.sh
diff --git a/tools/perf/tests/shell/coresight/thread_loop_check_tid_10.sh b/tools/perf/tests/shell/coresight/thread_loop_check_tid_10.sh new file mode 100755 index 000000000000..7c13636fc778 --- /dev/null +++ b/tools/perf/tests/shell/coresight/thread_loop_check_tid_10.sh @@ -0,0 +1,19 @@ +#!/bin/sh -e +# CoreSight / Thread Loop 10 Threads - Check TID
+# SPDX-License-Identifier: GPL-2.0 +# Carsten Haitzler carsten.haitzler@arm.com, 2021
+TEST="thread_loop" +. $(dirname $0)/../lib/coresight.sh +ARGS="10 1" +DATV="check-tid-10th" +DATA="$DATD/perf-$TEST-$DATV.data" +STDO="$DATD/perf-$TEST-$DATV.stdout"
+SHOW_TID=1 perf record -s $PERFRECOPT -o "$DATA" "$BIN" $ARGS > $STDO
+perf_dump_aux_tid_verify "$DATA" "$STDO"
+err=$? +exit $err diff --git a/tools/perf/tests/shell/coresight/thread_loop_check_tid_2.sh b/tools/perf/tests/shell/coresight/thread_loop_check_tid_2.sh new file mode 100755 index 000000000000..a067145af43c --- /dev/null +++ b/tools/perf/tests/shell/coresight/thread_loop_check_tid_2.sh @@ -0,0 +1,19 @@ +#!/bin/sh -e +# CoreSight / Thread Loop 2 Threads - Check TID
+# SPDX-License-Identifier: GPL-2.0 +# Carsten Haitzler carsten.haitzler@arm.com, 2021
+TEST="thread_loop" +. $(dirname $0)/../lib/coresight.sh +ARGS="2 20" +DATV="check-tid-2th" +DATA="$DATD/perf-$TEST-$DATV.data" +STDO="$DATD/perf-$TEST-$DATV.stdout"
+SHOW_TID=1 perf record -s $PERFRECOPT -o "$DATA" "$BIN" $ARGS > $STDO
+perf_dump_aux_tid_verify "$DATA" "$STDO"
+err=$? +exit $err
On 7/8/22 11:27, Mike Leach wrote:
Hi,
On Fri, 8 Jul 2022 at 10:22, Carsten Haitzler carsten.haitzler@foss.arm.com wrote:
On 7/5/22 14:53, James Clark wrote:
On 01/07/2022 13:07, carsten.haitzler@foss.arm.com wrote:
From: "Carsten Haitzler (Rasterman)" raster@rasterman.com
Add a script to drive the thread loop test that gathers data so it passes a minimum bar (in this case do we get any perf context data for every thread).
Signed-off-by: Carsten Haitzler carsten.haitzler@arm.com
Hi Carsten,
I checked this on N1SDP and I get failures in both threads tests. This is because it's looking for "CID=..." when in my output threads are shown as "VMID=...":
Idx:628048; ID:10; I_ADDR_CTXT_L_64IS0 : Address & Context, Long, 64 bit, IS0.; Addr=0x0000AAAAE3BF0B18; Ctxt: AArch64,EL0, NS; VMID=0xa588c;
I think with a change to the grep it should work.
Errrr... I get no VMID= ... it's all
Idx:563008; ID:12; I_ADDR_CTXT_L_64IS0 : Address & Context, Long, 64 bit, IS0.; Addr=0x0000AAAAE4B00A60; Ctxt: AArch64,EL0, NS; CID=0x00004aff;
are you using containers or something? because:
if(context.updated_c) { oss << "CID=0x" << std::hex << std::setfill('0') <<
std::setw(8) << context.ctxtID << "; "; } if(context.updated_v) { oss << "VMID=0x" << std::hex << std::setfill('0') << std::setw(4) << context.VMID << "; "; }
I'm running without any containers etc. - bare metal. Haven't bothered with any VM stuff.
In OpenOCD the CID should be the the pid/thread id. It seems to not be the same thing as VMID. I haven't traced this beyond here as to exactly what this represents though my first reaction is "This is extra VM info and not the PID/TID being looked for". OpenOCD is full of tests with log dumps that produce CID and VMID:
Idx:1676; ID:10; I_ADDR_CTXT_L_64IS0 : Address & Context, Long, 64 bit, IS0.; Addr=0xFFFFFFC000096A00; Ctxt: AArch64,EL1, NS; CID=0x00000000; VMID=0x0000;
A quick git grep CID= in OpenCD will show them all. My understanding is CID is the thread/process ID and thus the test/check "Do we get reported data from all threads? - anything?".
I don't think using VMID is right. The fact you are missing a CID is an issue though...
The register used for linux TID trace is dependent on the EL of the kernel. EL1 => CONTEXT_IDR_EL1 EL2 => CONTEXT_IDR_EL2.
By design, the trace hardware traces CONTEXT_IDR_EL2 as the VMID packet.
So, depending on your kernel build, TID can validly be traced as CID or VMID
Ahhh I haven't encountered that. So basically look for CID=xxx OR VMID=xxx if no CID=xxx is there.
Regards
Mike
Thanks James
.../coresight/thread_loop_check_tid_10.sh | 19 +++++++++++++++++++ .../coresight/thread_loop_check_tid_2.sh | 19 +++++++++++++++++++ 2 files changed, 38 insertions(+) create mode 100755 tools/perf/tests/shell/coresight/thread_loop_check_tid_10.sh create mode 100755 tools/perf/tests/shell/coresight/thread_loop_check_tid_2.sh
diff --git a/tools/perf/tests/shell/coresight/thread_loop_check_tid_10.sh b/tools/perf/tests/shell/coresight/thread_loop_check_tid_10.sh new file mode 100755 index 000000000000..7c13636fc778 --- /dev/null +++ b/tools/perf/tests/shell/coresight/thread_loop_check_tid_10.sh @@ -0,0 +1,19 @@ +#!/bin/sh -e +# CoreSight / Thread Loop 10 Threads - Check TID
+# SPDX-License-Identifier: GPL-2.0 +# Carsten Haitzler carsten.haitzler@arm.com, 2021
+TEST="thread_loop" +. $(dirname $0)/../lib/coresight.sh +ARGS="10 1" +DATV="check-tid-10th" +DATA="$DATD/perf-$TEST-$DATV.data" +STDO="$DATD/perf-$TEST-$DATV.stdout"
+SHOW_TID=1 perf record -s $PERFRECOPT -o "$DATA" "$BIN" $ARGS > $STDO
+perf_dump_aux_tid_verify "$DATA" "$STDO"
+err=$? +exit $err diff --git a/tools/perf/tests/shell/coresight/thread_loop_check_tid_2.sh b/tools/perf/tests/shell/coresight/thread_loop_check_tid_2.sh new file mode 100755 index 000000000000..a067145af43c --- /dev/null +++ b/tools/perf/tests/shell/coresight/thread_loop_check_tid_2.sh @@ -0,0 +1,19 @@ +#!/bin/sh -e +# CoreSight / Thread Loop 2 Threads - Check TID
+# SPDX-License-Identifier: GPL-2.0 +# Carsten Haitzler carsten.haitzler@arm.com, 2021
+TEST="thread_loop" +. $(dirname $0)/../lib/coresight.sh +ARGS="2 20" +DATV="check-tid-2th" +DATA="$DATD/perf-$TEST-$DATV.data" +STDO="$DATD/perf-$TEST-$DATV.stdout"
+SHOW_TID=1 perf record -s $PERFRECOPT -o "$DATA" "$BIN" $ARGS > $STDO
+perf_dump_aux_tid_verify "$DATA" "$STDO"
+err=$? +exit $err
From: "Carsten Haitzler (Rasterman)" raster@rasterman.com
Add test tool to be driven by further test scripts. This is a simple C based test that is for arm64 with some inline ASM to manually unroll a lot of code to have a very long sequence of commands.
Signed-off-by: Carsten Haitzler carsten.haitzler@arm.com --- tools/perf/tests/shell/coresight/Makefile | 3 +- .../coresight/unroll_loop_thread/.gitignore | 1 + .../coresight/unroll_loop_thread/Makefile | 33 +++++++++ .../unroll_loop_thread/unroll_loop_thread.c | 74 +++++++++++++++++++ 4 files changed, 110 insertions(+), 1 deletion(-) create mode 100644 tools/perf/tests/shell/coresight/unroll_loop_thread/.gitignore create mode 100644 tools/perf/tests/shell/coresight/unroll_loop_thread/Makefile create mode 100644 tools/perf/tests/shell/coresight/unroll_loop_thread/unroll_loop_thread.c
diff --git a/tools/perf/tests/shell/coresight/Makefile b/tools/perf/tests/shell/coresight/Makefile index 004974a71fb8..3b2b876cd9e2 100644 --- a/tools/perf/tests/shell/coresight/Makefile +++ b/tools/perf/tests/shell/coresight/Makefile @@ -7,7 +7,8 @@ include ../../../../../tools/scripts/utilities.mak SUBDIRS = \ asm_pure_loop \ memcpy_thread \ - thread_loop + thread_loop \ + unroll_loop_thread
all: $(SUBDIRS) $(SUBDIRS): diff --git a/tools/perf/tests/shell/coresight/unroll_loop_thread/.gitignore b/tools/perf/tests/shell/coresight/unroll_loop_thread/.gitignore new file mode 100644 index 000000000000..2cb4e996dbf3 --- /dev/null +++ b/tools/perf/tests/shell/coresight/unroll_loop_thread/.gitignore @@ -0,0 +1 @@ +unroll_loop_thread diff --git a/tools/perf/tests/shell/coresight/unroll_loop_thread/Makefile b/tools/perf/tests/shell/coresight/unroll_loop_thread/Makefile new file mode 100644 index 000000000000..6264c4e3abd1 --- /dev/null +++ b/tools/perf/tests/shell/coresight/unroll_loop_thread/Makefile @@ -0,0 +1,33 @@ +# SPDX-License-Identifier: GPL-2.0 +# Carsten Haitzler carsten.haitzler@arm.com, 2021 +include ../Makefile.miniconfig + +# Binary to produce +BIN=unroll_loop_thread +# Any linking/libraries needed for the binary - empty if none needed +LIB=-pthread + +all: $(BIN) + +$(BIN): $(BIN).c +ifdef CORESIGHT +ifeq ($(ARCH),arm64) +# Build line + $(Q)$(CC) $(BIN).c -o $(BIN) $(LIB) +endif +endif + +install-tests: all +ifdef CORESIGHT +ifeq ($(ARCH),arm64) +# Install the test tool in the right place + $(call QUIET_INSTALL, tests) \ + $(INSTALL) -d -m 755 '$(DESTDIR_SQ)$(perfexec_instdir_SQ)/$(INSTDIR_SUB)/$(BIN)'; \ + $(INSTALL) $(BIN) '$(DESTDIR_SQ)$(perfexec_instdir_SQ)/$(INSTDIR_SUB)/$(BIN)/$(BIN)' +endif +endif + +clean: + $(Q)$(RM) -f $(BIN) + +.PHONY: all clean install-tests diff --git a/tools/perf/tests/shell/coresight/unroll_loop_thread/unroll_loop_thread.c b/tools/perf/tests/shell/coresight/unroll_loop_thread/unroll_loop_thread.c new file mode 100644 index 000000000000..cb9d22c7dfb9 --- /dev/null +++ b/tools/perf/tests/shell/coresight/unroll_loop_thread/unroll_loop_thread.c @@ -0,0 +1,74 @@ +// SPDX-License-Identifier: GPL-2.0 +// Carsten Haitzler carsten.haitzler@arm.com, 2021 +#include <stdio.h> +#include <stdlib.h> +#include <unistd.h> +#include <string.h> +#include <pthread.h> + +struct args { + pthread_t th; + unsigned int in, out; + void *ret; +}; + +static void *thrfn(void *arg) +{ + struct args *a = arg; + unsigned int i, in = a->in; + + for (i = 0; i < 10000; i++) { + asm volatile ( +// force an unroll of thia add instruction so we can test long runs of code +#define SNIP1 "add %[in], %[in], #1\n" +// 10 +#define SNIP2 SNIP1 SNIP1 SNIP1 SNIP1 SNIP1 SNIP1 SNIP1 SNIP1 SNIP1 SNIP1 +// 100 +#define SNIP3 SNIP2 SNIP2 SNIP2 SNIP2 SNIP2 SNIP2 SNIP2 SNIP2 SNIP2 SNIP2 +// 1000 +#define SNIP4 SNIP3 SNIP3 SNIP3 SNIP3 SNIP3 SNIP3 SNIP3 SNIP3 SNIP3 SNIP3 +// 10000 +#define SNIP5 SNIP4 SNIP4 SNIP4 SNIP4 SNIP4 SNIP4 SNIP4 SNIP4 SNIP4 SNIP4 +// 100000 + SNIP5 SNIP5 SNIP5 SNIP5 SNIP5 SNIP5 SNIP5 SNIP5 SNIP5 SNIP5 + : /* out */ + : /* in */ [in] "r" (in) + : /* clobber */ + ); + } +} + +static pthread_t new_thr(void *(*fn) (void *arg), void *arg) +{ + pthread_t t; + pthread_attr_t attr; + + pthread_attr_init(&attr); + pthread_create(&t, &attr, fn, arg); + return t; +} + +int main(int argc, char **argv) +{ + unsigned int i, thr; + pthread_t threads[256]; + struct args args[256]; + + if (argc < 2) { + printf("ERR: %s [numthreads]\n", argv[0]); + exit(1); + } + + thr = atoi(argv[1]); + if ((thr > 256) || (thr < 1)) { + printf("ERR: threads 1-256\n"); + exit(1); + } + for (i = 0; i < thr; i++) { + args[i].in = rand(); + args[i].th = new_thr(thrfn, &(args[i])); + } + for (i = 0; i < thr; i++) + pthread_join(args[i].th, &(args[i].ret)); + return 0; +}
From: "Carsten Haitzler (Rasterman)" raster@rasterman.com
This adds scripts to drive the unroll thread tests to compare perf output against a minimum bar of content/quality.
Signed-off-by: Carsten Haitzler carsten.haitzler@arm.com --- .../shell/coresight/unroll_loop_thread_10.sh | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) create mode 100755 tools/perf/tests/shell/coresight/unroll_loop_thread_10.sh
diff --git a/tools/perf/tests/shell/coresight/unroll_loop_thread_10.sh b/tools/perf/tests/shell/coresight/unroll_loop_thread_10.sh new file mode 100755 index 000000000000..f48c85230b15 --- /dev/null +++ b/tools/perf/tests/shell/coresight/unroll_loop_thread_10.sh @@ -0,0 +1,18 @@ +#!/bin/sh -e +# CoreSight / Unroll Loop Thread 10 + +# SPDX-License-Identifier: GPL-2.0 +# Carsten Haitzler carsten.haitzler@arm.com, 2021 + +TEST="unroll_loop_thread" +. $(dirname $0)/../lib/coresight.sh +ARGS="10" +DATV="10" +DATA="$DATD/perf-$TEST-$DATV.data" + +perf record $PERFRECOPT -o "$DATA" "$BIN" $ARGS + +perf_dump_aux_verify "$DATA" 10 10 10 + +err=$? +exit $err
From: "Carsten Haitzler (Rasterman)" raster@rasterman.com
Ignore other output files of the new CoreSight tests so they don't fill git status with noise we don't need or want.
Signed-off-by: Carsten Haitzler carsten.haitzler@arm.com --- tools/perf/.gitignore | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/tools/perf/.gitignore b/tools/perf/.gitignore index faa23b5d32f5..a653311d9693 100644 --- a/tools/perf/.gitignore +++ b/tools/perf/.gitignore @@ -22,6 +22,7 @@ perf-archive perf-iostat tags TAGS +stats-*.csv cscope* config.mak config.mak.autogen @@ -29,6 +30,7 @@ config.mak.autogen *-flex.* *.pyc *.pyo +*.stdout .config-detected util/intel-pt-decoder/inat-tables.c arch/*/include/generated/
From: "Carsten Haitzler (Rasterman)" raster@rasterman.com
This adds/improves documentation helping people get started with CoreSight and perf as well as describing the testing and how it works.
Signed-off-by: Carsten Haitzler carsten.haitzler@arm.com --- .../trace/coresight/coresight-perf.rst | 160 ++++++++++++++++++ tools/perf/Documentation/arm-coresight.txt | 5 + 2 files changed, 165 insertions(+) create mode 100644 Documentation/trace/coresight/coresight-perf.rst create mode 100644 tools/perf/Documentation/arm-coresight.txt
diff --git a/Documentation/trace/coresight/coresight-perf.rst b/Documentation/trace/coresight/coresight-perf.rst new file mode 100644 index 000000000000..de25082447dd --- /dev/null +++ b/Documentation/trace/coresight/coresight-perf.rst @@ -0,0 +1,160 @@ +.. SPDX-License-Identifier: GPL-2.0 + +================ +CoreSight - Perf +================ + + :Author: Carsten Haitzler carsten.haitzler@arm.com + :Date: June 29th, 2022 + +Perf is able to locally access CoreSight trace data and store it to the +output perf data files. This data can then be later decoded to give the +instructions that were traced for debugging or profiling purposes. You +can log such data with a perf record command like: + + perf record -e cs_etm//u testbinary + +This would run some test binary (testbinary) until it exits and record +a perf.data trace file. That file would have AUX sections if CoreSight +is working correctly. You can dump the content of this file as +readable text with a command like: + + perf report --stdio --dump -i perf.data + +You should find some sections of this file have AUX data blocks like: + + 0x1e78 [0x30]: PERF_RECORD_AUXTRACE size: 0x11dd0 offset: 0 ref: 0x1b614fc1061b0ad1 idx: 0 tid: 531230 cpu: -1 + + . ... CoreSight ETM Trace data: size 73168 bytes + Idx:0; ID:10; I_ASYNC : Alignment Synchronisation. + Idx:12; ID:10; I_TRACE_INFO : Trace Info.; INFO=0x0 { CC.0 } + Idx:17; ID:10; I_ADDR_L_64IS0 : Address, Long, 64 bit, IS0.; Addr=0x0000000000000000; + Idx:26; ID:10; I_TRACE_ON : Trace On. + Idx:27; ID:10; I_ADDR_CTXT_L_64IS0 : Address & Context, Long, 64 bit, IS0.; Addr=0x0000FFFFB6069140; Ctxt: AArch64,EL0, NS; + Idx:38; ID:10; I_ATOM_F6 : Atom format 6.; EEEEEEEEEEEEEEEEEEEEEEEE + Idx:39; ID:10; I_ATOM_F6 : Atom format 6.; EEEEEEEEEEEEEEEEEEEEEEEE + Idx:40; ID:10; I_ATOM_F6 : Atom format 6.; EEEEEEEEEEEEEEEEEEEEEEEE + Idx:41; ID:10; I_ATOM_F6 : Atom format 6.; EEEEEEEEEEEN + ... + +If you see these above, then your system is tracing CoreSight data +correctly. + +To compile perf with CoreSight support in the tools/perf directory do + + make CORESIGHT=1 + +This requires OpenCSD to build. You may install distribution packages +for the support such as libopencsd and libopencsd-dev or download it +and build yourself. Upstream OpenCSD is located at: + + https://github.com/Linaro/OpenCSD + +For complete information on building perf with CoreSight support and +more extensive usage look at: + + https://github.com/Linaro/OpenCSD/blob/master/HOWTO.md + + +Kernel CoreSight Support +------------------------ + +You will also want CoreSight support enabled in your kernel config. +Ensure it is enabled with: + + CONFIG_CORESIGHT=y + +There are various other CoreSight options you probably also want +enabled like: + + CONFIG_CORESIGHT_LINKS_AND_SINKS=y + CONFIG_CORESIGHT_LINK_AND_SINK_TMC=y + CONFIG_CORESIGHT_CATU=y + CONFIG_CORESIGHT_SINK_TPIU=y + CONFIG_CORESIGHT_SINK_ETBV10=y + CONFIG_CORESIGHT_SOURCE_ETM4X=y + CONFIG_CORESIGHT_STM=y + CONFIG_CORESIGHT_CPU_DEBUG=y + CONFIG_CORESIGHT_CTI=y + CONFIG_CORESIGHT_CTI_INTEGRATION_REGS=y + +Please refer to the kernel configuration help for more information. + +Perf test - Verify kernel and userspace perf CoreSight work +----------------------------------------------------------- + +When you run perf test, it will do a lot of self tests. Some of those +tests will cover CoreSight (only if enabled and on ARM64). You +generally would run perf test from the tools/perf directory in the +kernel tree. Some tests will check some internal perf support like: + + Check Arm CoreSight trace data recording and synthesized samples + Check Arm SPE trace data recording and synthesized samples + +Some others will actually use perf record and some test binaries that +are in tests/shell/coresight and will collect traces to ensure a +minimum level of functionality is met. The scripts that launch these +tests are in the same directory. These will all look like: + + CoreSight / ASM Pure Loop + CoreSight / Memcpy 16k 10 Threads + CoreSight / Thread Loop 10 Threads - Check TID + ... + +These perf record tests will not run if the tool binaries do not exist +in tests/shell/coresight/*/ and will be skipped. If you do not have +CoreSight support in hardware then either do not build perf with +CoreSight support or remove these binaries in order to not have these +tests fail and have them skip instead. + +These tests will log historical results in the current working +directory (e.g. tools/perf) and will be named stats-*.csv like: + + stats-asm_pure_loop-out.csv + stats-memcpy_thread-16k_10.csv + ... + +These statistic files log some aspects of the AUX data sections in +the perf data output counting some numbers of certain encodings (a +good way to know that it's working in a very simple way). One problem +with CoreSight is that given a large enough amount of data needing to +be logged, some of it can be lost due to the processor not waking up +in time to read out all the data from buffers etc.. You will notice +that the amount of data collected can vary a lot per run of perf test. +If you wish to see how this changes over time, simply run perf test +multiple times and all these csv files will have more and more data +appended to it that you can later examine, graph and otherwise use to +figure out if things have become worse or better. + +This means sometimes these tests fail as they don't capture all the +data needed. This is about tracking quality and amount of data +produced over time and to see when changes to the Linux kernel improve +quality of traces. + +Be aware that some of these tests take quite a while to run, specifically +in processing the perf data file and dumping contents to then examine what +is inside. + +You can change where these csv logs are stored by setting the +PERF_TEST_CORESIGHT_STATDIR environment variable before running perf +test like: + + export PERF_TEST_CORESIGHT_STATDIR=/var/tmp + perf test + +They will also store resulting perf output data in the current +directory for later inspection like: + + perf-asm_pure_loop-out.data + perf-memcpy_thread-16k_10.data + ... + +You can alter where the perf data files are stored by setting the +PERF_TEST_CORESIGHT_DATADIR environment variable such as: + + PERF_TEST_CORESIGHT_DATADIR=/var/tmp + perf test + +You may wish to set these above environment variables if you whish to +keep the output of tests outside of the current working directory for +longer term storage and examination. diff --git a/tools/perf/Documentation/arm-coresight.txt b/tools/perf/Documentation/arm-coresight.txt new file mode 100644 index 000000000000..f94743a4d161 --- /dev/null +++ b/tools/perf/Documentation/arm-coresight.txt @@ -0,0 +1,5 @@ +Arm CoreSight Support +===================== + +Please see docuentation in the central CoreSight location in the +kernel tree under Documentation/trace/coresight