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; +}