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authorNamhyung Kim <namhyung@kernel.org>2022-11-17 00:38:51 +0100
committerArnaldo Carvalho de Melo <acme@redhat.com>2022-11-23 14:28:01 +0100
commita104f0ea99d846df19aad8a5476eb9bc39fa42ca (patch)
treeaff036ebf570702187b3479fa6729f6c0e689986
parentperf test: Replace arm spe fork test workload with sqrtloop (diff)
downloadlinux-a104f0ea99d846df19aad8a5476eb9bc39fa42ca.tar.xz
linux-a104f0ea99d846df19aad8a5476eb9bc39fa42ca.zip
perf test: Add 'brstack' test workload
The brstack is to run different kinds of branches repeatedly. This is necessary for brstack test case to verify if it has correct branch info. $ perf test -w brstack I renamed the internal functions to have brstack_ prefix as it's too generic name. Add a -U_FORTIFY_SOURCE to the brstack 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/20221116233854.1596378-10-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
-rw-r--r--tools/perf/tests/builtin-test.c1
-rw-r--r--tools/perf/tests/tests.h1
-rw-r--r--tools/perf/tests/workloads/Build2
-rw-r--r--tools/perf/tests/workloads/brstack.c40
4 files changed, 44 insertions, 0 deletions
diff --git a/tools/perf/tests/builtin-test.c b/tools/perf/tests/builtin-test.c
index 9acb7a93eeb9..69fa56939309 100644
--- a/tools/perf/tests/builtin-test.c
+++ b/tools/perf/tests/builtin-test.c
@@ -123,6 +123,7 @@ static struct test_workload *workloads[] = {
&workload__thloop,
&workload__leafloop,
&workload__sqrtloop,
+ &workload__brstack,
};
static int num_subtests(const struct test_suite *t)
diff --git a/tools/perf/tests/tests.h b/tools/perf/tests/tests.h
index 18c40319e67c..dc96f59cac2e 100644
--- a/tools/perf/tests/tests.h
+++ b/tools/perf/tests/tests.h
@@ -204,5 +204,6 @@ DECLARE_WORKLOAD(noploop);
DECLARE_WORKLOAD(thloop);
DECLARE_WORKLOAD(leafloop);
DECLARE_WORKLOAD(sqrtloop);
+DECLARE_WORKLOAD(brstack);
#endif /* TESTS_H */
diff --git a/tools/perf/tests/workloads/Build b/tools/perf/tests/workloads/Build
index 2312a338f01c..ae06a5538b17 100644
--- a/tools/perf/tests/workloads/Build
+++ b/tools/perf/tests/workloads/Build
@@ -4,6 +4,8 @@ perf-y += noploop.o
perf-y += thloop.o
perf-y += leafloop.o
perf-y += sqrtloop.o
+perf-y += brstack.o
CFLAGS_sqrtloop.o = -g -O0 -fno-inline -U_FORTIFY_SOURCE
CFLAGS_leafloop.o = -g -O0 -fno-inline -fno-omit-frame-pointer -U_FORTIFY_SOURCE
+CFLAGS_brstack.o = -g -O0 -fno-inline -U_FORTIFY_SOURCE
diff --git a/tools/perf/tests/workloads/brstack.c b/tools/perf/tests/workloads/brstack.c
new file mode 100644
index 000000000000..0b60bd37b9d1
--- /dev/null
+++ b/tools/perf/tests/workloads/brstack.c
@@ -0,0 +1,40 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#include <stdlib.h>
+#include "../tests.h"
+
+#define BENCH_RUNS 999999
+
+static volatile int cnt;
+
+static void brstack_bar(void) {
+} /* return */
+
+static void brstack_foo(void) {
+ brstack_bar(); /* call */
+} /* return */
+
+static void brstack_bench(void) {
+ void (*brstack_foo_ind)(void) = brstack_foo;
+
+ if ((cnt++) % 3) /* branch (cond) */
+ brstack_foo(); /* call */
+ brstack_bar(); /* call */
+ brstack_foo_ind(); /* call (ind) */
+}
+
+static int brstack(int argc, const char **argv)
+{
+ int num_loops = BENCH_RUNS;
+
+ if (argc > 0)
+ num_loops = atoi(argv[0]);
+
+ while (1) {
+ if ((cnt++) > num_loops)
+ break;
+ brstack_bench();/* call */
+ } /* branch (uncond) */
+ return 0;
+}
+
+DEFINE_WORKLOAD(brstack);