6.1-stable review patch. If anyone has any objections, please let me know.
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From: Namhyung Kim namhyung@kernel.org
[ Upstream commit f215054d749b17c56e014fdca2fcc592dac4529c ]
The -w/--workload option is to run a simple workload used by testing. This adds a basic framework to run the workloads and 'noploop' workload as an example.
$ perf test -w noploop
The noploop does a loop doing nothing (NOP) for a second by default. It can have an optional argument to specify the time in seconds.
Signed-off-by: Namhyung Kim namhyung@kernel.org Cc: Adrian Hunter adrian.hunter@intel.com Cc: Athira Jajeev atrajeev@linux.vnet.ibm.com Cc: German Gomez german.gomez@arm.com Cc: Ian Rogers irogers@google.com Cc: Ingo Molnar mingo@kernel.org Cc: James Clark james.clark@arm.com Cc: Jiri Olsa jolsa@kernel.org Cc: Leo Yan leo.yan@linaro.org Cc: Peter Zijlstra peterz@infradead.org Cc: Zhengjun Xing zhengjun.xing@linux.intel.com Link: https://lore.kernel.org/r/20221116233854.1596378-2-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo acme@redhat.com Stable-dep-of: 256ef072b384 ("perf tests: Make "test data symbol" more robust on Neoverse N1") Signed-off-by: Sasha Levin sashal@kernel.org --- tools/perf/tests/Build | 2 ++ tools/perf/tests/builtin-test.c | 24 +++++++++++++++++++++ tools/perf/tests/tests.h | 22 +++++++++++++++++++ tools/perf/tests/workloads/Build | 3 +++ tools/perf/tests/workloads/noploop.c | 32 ++++++++++++++++++++++++++++ 5 files changed, 83 insertions(+) create mode 100644 tools/perf/tests/workloads/Build create mode 100644 tools/perf/tests/workloads/noploop.c
diff --git a/tools/perf/tests/Build b/tools/perf/tests/Build index 2064a640facbe..11b69023011b0 100644 --- a/tools/perf/tests/Build +++ b/tools/perf/tests/Build @@ -103,3 +103,5 @@ endif CFLAGS_attr.o += -DBINDIR="BUILD_STR($(bindir_SQ))" -DPYTHON="BUILD_STR($(PYTHON_WORD))" CFLAGS_python-use.o += -DPYTHONPATH="BUILD_STR($(OUTPUT)python)" -DPYTHON="BUILD_STR($(PYTHON_WORD))" CFLAGS_dwarf-unwind.o += -fno-optimize-sibling-calls + +perf-y += workloads/ diff --git a/tools/perf/tests/builtin-test.c b/tools/perf/tests/builtin-test.c index 7122eae1d98d9..ce641ccfcf814 100644 --- a/tools/perf/tests/builtin-test.c +++ b/tools/perf/tests/builtin-test.c @@ -118,6 +118,10 @@ static struct test_suite **tests[] = { arch_tests, };
+static struct test_workload *workloads[] = { + &workload__noploop, +}; + static int num_subtests(const struct test_suite *t) { int num; @@ -475,6 +479,21 @@ static int perf_test__list(int argc, const char **argv) return 0; }
+static int run_workload(const char *work, int argc, const char **argv) +{ + unsigned int i = 0; + struct test_workload *twl; + + for (i = 0; i < ARRAY_SIZE(workloads); i++) { + twl = workloads[i]; + if (!strcmp(twl->name, work)) + return twl->func(argc, argv); + } + + pr_info("No workload found: %s\n", work); + return -1; +} + int cmd_test(int argc, const char **argv) { const char *test_usage[] = { @@ -482,12 +501,14 @@ int cmd_test(int argc, const char **argv) NULL, }; const char *skip = NULL; + const char *workload = NULL; const struct option test_options[] = { OPT_STRING('s', "skip", &skip, "tests", "tests to skip"), OPT_INCR('v', "verbose", &verbose, "be more verbose (show symbol address, etc)"), OPT_BOOLEAN('F', "dont-fork", &dont_fork, "Do not fork for testcase"), + OPT_STRING('w', "workload", &workload, "work", "workload to run for testing"), OPT_END() }; const char * const test_subcommands[] = { "list", NULL }; @@ -504,6 +525,9 @@ int cmd_test(int argc, const char **argv) if (argc >= 1 && !strcmp(argv[0], "list")) return perf_test__list(argc - 1, argv + 1);
+ if (workload) + return run_workload(workload, argc, argv); + symbol_conf.priv_size = sizeof(int); symbol_conf.sort_by_name = true; symbol_conf.try_vmlinux_path = true; diff --git a/tools/perf/tests/tests.h b/tools/perf/tests/tests.h index 5bbb8f6a48fcb..d315d0d6fc977 100644 --- a/tools/perf/tests/tests.h +++ b/tools/perf/tests/tests.h @@ -180,4 +180,26 @@ int test__arch_unwind_sample(struct perf_sample *sample, DECLARE_SUITE(vectors_page); #endif
+/* + * Define test workloads to be used in test suites. + */ +typedef int (*workload_fnptr)(int argc, const char **argv); + +struct test_workload { + const char *name; + workload_fnptr func; +}; + +#define DECLARE_WORKLOAD(work) \ + extern struct test_workload workload__##work + +#define DEFINE_WORKLOAD(work) \ +struct test_workload workload__##work = { \ + .name = #work, \ + .func = work, \ +} + +/* The list of test workloads */ +DECLARE_WORKLOAD(noploop); + #endif /* TESTS_H */ diff --git a/tools/perf/tests/workloads/Build b/tools/perf/tests/workloads/Build new file mode 100644 index 0000000000000..f98e968d4633a --- /dev/null +++ b/tools/perf/tests/workloads/Build @@ -0,0 +1,3 @@ +# SPDX-License-Identifier: GPL-2.0 + +perf-y += noploop.o diff --git a/tools/perf/tests/workloads/noploop.c b/tools/perf/tests/workloads/noploop.c new file mode 100644 index 0000000000000..940ea5910a84c --- /dev/null +++ b/tools/perf/tests/workloads/noploop.c @@ -0,0 +1,32 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#include <stdlib.h> +#include <signal.h> +#include <unistd.h> +#include <linux/compiler.h> +#include "../tests.h" + +static volatile sig_atomic_t done; + +static void sighandler(int sig __maybe_unused) +{ + done = 1; +} + +static int noploop(int argc, const char **argv) +{ + int sec = 1; + + if (argc > 0) + sec = atoi(argv[0]); + + signal(SIGINT, sighandler); + signal(SIGALRM, sighandler); + alarm(sec); + + while (!done) + continue; + + return 0; +} + +DEFINE_WORKLOAD(noploop);