Messages in this thread Patch in this message | | | From | Namhyung Kim <> | Subject | [PATCH 05/12] perf test: Add 'leafloop' test workload | Date | Wed, 16 Nov 2022 15:38:47 -0800 |
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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
Signed-off-by: Namhyung Kim <namhyung@kernel.org> --- tools/perf/tests/builtin-test.c | 1 + tools/perf/tests/tests.h | 1 + tools/perf/tests/workloads/Build | 3 +++ tools/perf/tests/workloads/leafloop.c | 34 +++++++++++++++++++++++++++ 4 files changed, 39 insertions(+) create mode 100644 tools/perf/tests/workloads/leafloop.c
diff --git a/tools/perf/tests/builtin-test.c b/tools/perf/tests/builtin-test.c index 161f38476e77..0ed5ac452f6e 100644 --- a/tools/perf/tests/builtin-test.c +++ b/tools/perf/tests/builtin-test.c @@ -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) diff --git a/tools/perf/tests/tests.h b/tools/perf/tests/tests.h index e6edfeeadaeb..86804dd6452b 100644 --- a/tools/perf/tests/tests.h +++ b/tools/perf/tests/tests.h @@ -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 */ diff --git a/tools/perf/tests/workloads/Build b/tools/perf/tests/workloads/Build index b8964b1099c0..631596bdb2b3 100644 --- a/tools/perf/tests/workloads/Build +++ b/tools/perf/tests/workloads/Build @@ -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 diff --git a/tools/perf/tests/workloads/leafloop.c b/tools/perf/tests/workloads/leafloop.c new file mode 100644 index 000000000000..1bf5cc97649b --- /dev/null +++ b/tools/perf/tests/workloads/leafloop.c @@ -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); -- 2.38.1.584.g0f3c55d4c2-goog
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