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perf test: Add 'leafloop' test workload

Browse source 
The leafloop workload is to run an infinite loop in the test_leaf
function.  This is needed for the ARM fp callgraph test to verify if it
gets the correct callchains.

  $ perf test -w leafloop

Committer notes:

Add a:

  -U_FORTIFY_SOURCE

to the leafloop 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/20221116233854.1596378-6-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Namhyung Kim 2022-11-16 15:38:47 -08:00 committed by Arnaldo Carvalho de Melo
parent 0b8ff0ba27
commit 41522f7442
4 changed files with 39 additions and 0 deletions
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1
tools/perf/tests/builtin-test.c
View file

@ -121,6 +121,7 @@ static struct test_suite **tests[] = {
static struct test_workload *workloads[] = {
&workload__noploop,
&workload__thloop,
&workload__leafloop,
};
static int num_subtests(const struct test_suite *t)

1
tools/perf/tests/tests.h
View file

@ -202,5 +202,6 @@ struct test_workload workload__##work = { \
/* The list of test workloads */
DECLARE_WORKLOAD(noploop);
DECLARE_WORKLOAD(thloop);
DECLARE_WORKLOAD(leafloop);
#endif /* TESTS_H */

3
tools/perf/tests/workloads/Build
View file

@ -2,3 +2,6 @@
perf-y += noploop.o
perf-y += thloop.o
perf-y += leafloop.o
CFLAGS_leafloop.o = -g -O0 -fno-inline -fno-omit-frame-pointer -U_FORTIFY_SOURCE

34
tools/perf/tests/workloads/leafloop.c Normal file
View file

@ -0,0 +1,34 @@
/* SPDX-License-Identifier: GPL-2.0 */
#include <stdlib.h>
#include <linux/compiler.h>
#include "../tests.h"
/* We want to check these symbols in perf script */
noinline void leaf(volatile int b);
noinline void parent(volatile int b);
static volatile int a;
noinline void leaf(volatile int b)
{
for (;;)
a += b;
}
noinline void parent(volatile int b)
{
leaf(b);
}
static int leafloop(int argc, const char **argv)
{
int c = 1;
if (argc > 0)
c = atoi(argv[0]);
parent(c);
return 0;
}
DEFINE_WORKLOAD(leafloop);