Messages in this thread Patch in this message | | | From | Namhyung Kim <> | Subject | [PATCH 3/8] perf test: Use a test program in perf record tests | Date | Thu, 20 Oct 2022 10:26:38 -0700 |
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If the system has cc it could build a test program with two threads and then use it for more detailed testing. Also it accepts an option to run a thread forever to ensure multi-thread runs.
If cc is not found, it falls back to use the default value 'true'.
Signed-off-by: Namhyung Kim <namhyung@kernel.org> --- tools/perf/tests/shell/record.sh | 64 ++++++++++++++++++++++++++++++-- 1 file changed, 60 insertions(+), 4 deletions(-)
diff --git a/tools/perf/tests/shell/record.sh b/tools/perf/tests/shell/record.sh index 464071462809..952981481239 100755 --- a/tools/perf/tests/shell/record.sh +++ b/tools/perf/tests/shell/record.sh @@ -6,10 +6,17 @@ set -e err=0 perfdata=$(mktemp /tmp/__perf_test.perf.data.XXXXX) +testprog=$(mktemp /tmp/__perf_test.prog.XXXXXX) +testsym="test_loop" cleanup() { rm -f "${perfdata}" rm -f "${perfdata}".old + + if [ "${testprog}" != "true" ]; then + rm -f "${testprog}" + fi + trap - EXIT TERM INT } @@ -19,9 +26,56 @@ trap_cleanup() { } trap trap_cleanup EXIT TERM INT +build_test_program() { + if ! [ -x "$(command -v cc)" ]; then + # No CC found. Fall back to 'true' + testprog=true + testsym=true + return + fi + + echo "Build a test program" + cat <<EOF | cc -o ${testprog} -xc - -pthread +#include <stdio.h> +#include <stdlib.h> +#include <pthread.h> + +void test_loop(void) { + volatile int count = 1000000; + + while (count--) + continue; +} + +void *thfunc(void *arg) { + int forever = *(int *)arg; + + do { + test_loop(); + } while (forever); + + return NULL; +} + +int main(int argc, char *argv[]) { + pthread_t th; + int forever = 0; + + if (argc > 1) + forever = atoi(argv[1]); + + pthread_create(&th, NULL, thfunc, &forever); + test_loop(); + pthread_join(th, NULL); + + return 0; +} +EOF +} + test_per_thread() { echo "Basic --per-thread mode test" - if ! perf record -o /dev/null --quiet true 2> /dev/null + if ! perf record -o /dev/null --quiet ${testprog} 2> /dev/null then echo "Per-thread record [Skipped event not supported]" if [ $err -ne 1 ] @@ -30,13 +84,13 @@ test_per_thread() { fi return fi - if ! perf record --per-thread -o "${perfdata}" true 2> /dev/null + if ! perf record --per-thread -o "${perfdata}" ${testprog} 2> /dev/null then echo "Per-thread record [Failed record]" err=1 return fi - if ! perf report -i "${perfdata}" -q | grep -q true + if ! perf report -i "${perfdata}" -q | grep -q "${testsym}" then echo "Per-thread record [Failed missing output]" err=1 @@ -62,7 +116,7 @@ test_register_capture() { return fi if ! perf record -o - --intr-regs=di,r8,dx,cx -e br_inst_retired.near_call:p \ - -c 1000 --per-thread true 2> /dev/null \ + -c 1000 --per-thread ${testprog} 2> /dev/null \ | perf script -F ip,sym,iregs -i - 2> /dev/null \ | grep -q "DI:" then @@ -73,6 +127,8 @@ test_register_capture() { echo "Register capture test [Success]" } +build_test_program + test_per_thread test_register_capture -- 2.38.0.135.g90850a2211-goog
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