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perf test: Add 'datasym' test workload
The datasym workload is to check if perf mem command gets the data addresses precisely. This is needed for data symbol test. $ perf test -w datasym I had to keep the buf1 in the data section, otherwise it could end up in the BSS and was mmaped as a separate //anon region, then it was not symbolized at all. It needs to be fixed separately. Committer notes: Add a -U _FORTIFY_SOURCE to the datasym CFLAGS, as the main perf flags set it and it requires building with optimization, and this new test has a -O0. 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/20221116233854.1596378-12-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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4 changed files with 28 additions and 0 deletions
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@ -124,6 +124,7 @@ static struct test_workload *workloads[] = {
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&workload__leafloop,
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&workload__sqrtloop,
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&workload__brstack,
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&workload__datasym,
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};
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static int num_subtests(const struct test_suite *t)
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@ -205,5 +205,6 @@ DECLARE_WORKLOAD(thloop);
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DECLARE_WORKLOAD(leafloop);
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DECLARE_WORKLOAD(sqrtloop);
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DECLARE_WORKLOAD(brstack);
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DECLARE_WORKLOAD(datasym);
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#endif /* TESTS_H */
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@ -5,7 +5,9 @@ perf-y += thloop.o
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perf-y += leafloop.o
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perf-y += sqrtloop.o
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perf-y += brstack.o
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perf-y += datasym.o
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CFLAGS_sqrtloop.o = -g -O0 -fno-inline -U_FORTIFY_SOURCE
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CFLAGS_leafloop.o = -g -O0 -fno-inline -fno-omit-frame-pointer -U_FORTIFY_SOURCE
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CFLAGS_brstack.o = -g -O0 -fno-inline -U_FORTIFY_SOURCE
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CFLAGS_datasym.o = -g -O0 -fno-inline -U_FORTIFY_SOURCE
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24
tools/perf/tests/workloads/datasym.c
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24
tools/perf/tests/workloads/datasym.c
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@ -0,0 +1,24 @@
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#include <linux/compiler.h>
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#include "../tests.h"
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typedef struct _buf {
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char data1;
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char reserved[55];
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char data2;
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} buf __attribute__((aligned(64)));
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static buf buf1 = {
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/* to have this in the data section */
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.reserved[0] = 1,
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};
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static int datasym(int argc __maybe_unused, const char **argv __maybe_unused)
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{
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for (;;) {
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buf1.data1++;
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buf1.data2 += buf1.data1;
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}
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return 0;
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}
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DEFINE_WORKLOAD(datasym);
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