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Date: Wed, 9 Nov 2022 09:46:24 -0800
From: Namhyung Kim <namhyung@...nel.org>
To: Arnaldo Carvalho de Melo <acme@...nel.org>,
Jiri Olsa <jolsa@...nel.org>
Cc: Ingo Molnar <mingo@...nel.org>,
Peter Zijlstra <peterz@...radead.org>,
LKML <linux-kernel@...r.kernel.org>,
Ian Rogers <irogers@...gle.com>,
Adrian Hunter <adrian.hunter@...el.com>,
linux-perf-users@...r.kernel.org, Leo Yan <leo.yan@...aro.org>,
German Gomez <german.gomez@....com>,
Zhengjun Xing <zhengjun.xing@...ux.intel.com>,
James Clark <james.clark@....com>
Subject: [PATCH 01/12] perf test: Add -w/--workload option
The -w/--workload option is to run a simple workload used by testing.
This adds a basic framework to run the workloads and 'noploop' workload
as an example.
$ perf test -w noploop
The noploop does a loop doing nothing (NOP) for a second by default.
It can have an optional argument to specify the time in seconds.
Signed-off-by: Namhyung Kim <namhyung@...nel.org>
---
tools/perf/tests/Build | 2 ++
tools/perf/tests/builtin-test.c | 24 +++++++++++++++++++++
tools/perf/tests/tests.h | 22 +++++++++++++++++++
tools/perf/tests/workloads/Build | 3 +++
tools/perf/tests/workloads/noploop.c | 32 ++++++++++++++++++++++++++++
5 files changed, 83 insertions(+)
create mode 100644 tools/perf/tests/workloads/Build
create mode 100644 tools/perf/tests/workloads/noploop.c
diff --git a/tools/perf/tests/Build b/tools/perf/tests/Build
index 2064a640facb..11b69023011b 100644
--- a/tools/perf/tests/Build
+++ b/tools/perf/tests/Build
@@ -103,3 +103,5 @@ endif
CFLAGS_attr.o += -DBINDIR="BUILD_STR($(bindir_SQ))" -DPYTHON="BUILD_STR($(PYTHON_WORD))"
CFLAGS_python-use.o += -DPYTHONPATH="BUILD_STR($(OUTPUT)python)" -DPYTHON="BUILD_STR($(PYTHON_WORD))"
CFLAGS_dwarf-unwind.o += -fno-optimize-sibling-calls
+
+perf-y += workloads/
diff --git a/tools/perf/tests/builtin-test.c b/tools/perf/tests/builtin-test.c
index 7122eae1d98d..ce641ccfcf81 100644
--- a/tools/perf/tests/builtin-test.c
+++ b/tools/perf/tests/builtin-test.c
@@ -118,6 +118,10 @@ static struct test_suite **tests[] = {
arch_tests,
};
+static struct test_workload *workloads[] = {
+ &workload__noploop,
+};
+
static int num_subtests(const struct test_suite *t)
{
int num;
@@ -475,6 +479,21 @@ static int perf_test__list(int argc, const char **argv)
return 0;
}
+static int run_workload(const char *work, int argc, const char **argv)
+{
+ unsigned int i = 0;
+ struct test_workload *twl;
+
+ for (i = 0; i < ARRAY_SIZE(workloads); i++) {
+ twl = workloads[i];
+ if (!strcmp(twl->name, work))
+ return twl->func(argc, argv);
+ }
+
+ pr_info("No workload found: %s\n", work);
+ return -1;
+}
+
int cmd_test(int argc, const char **argv)
{
const char *test_usage[] = {
@@ -482,12 +501,14 @@ int cmd_test(int argc, const char **argv)
NULL,
};
const char *skip = NULL;
+ const char *workload = NULL;
const struct option test_options[] = {
OPT_STRING('s', "skip", &skip, "tests", "tests to skip"),
OPT_INCR('v', "verbose", &verbose,
"be more verbose (show symbol address, etc)"),
OPT_BOOLEAN('F', "dont-fork", &dont_fork,
"Do not fork for testcase"),
+ OPT_STRING('w', "workload", &workload, "work", "workload to run for testing"),
OPT_END()
};
const char * const test_subcommands[] = { "list", NULL };
@@ -504,6 +525,9 @@ int cmd_test(int argc, const char **argv)
if (argc >= 1 && !strcmp(argv[0], "list"))
return perf_test__list(argc - 1, argv + 1);
+ if (workload)
+ return run_workload(workload, argc, argv);
+
symbol_conf.priv_size = sizeof(int);
symbol_conf.sort_by_name = true;
symbol_conf.try_vmlinux_path = true;
diff --git a/tools/perf/tests/tests.h b/tools/perf/tests/tests.h
index 5bbb8f6a48fc..d315d0d6fc97 100644
--- a/tools/perf/tests/tests.h
+++ b/tools/perf/tests/tests.h
@@ -180,4 +180,26 @@ int test__arch_unwind_sample(struct perf_sample *sample,
DECLARE_SUITE(vectors_page);
#endif
+/*
+ * Define test workloads to be used in test suites.
+ */
+typedef int (*workload_fnptr)(int argc, const char **argv);
+
+struct test_workload {
+ const char *name;
+ workload_fnptr func;
+};
+
+#define DECLARE_WORKLOAD(work) \
+ extern struct test_workload workload__##work
+
+#define DEFINE_WORKLOAD(work) \
+struct test_workload workload__##work = { \
+ .name = #work, \
+ .func = work, \
+}
+
+/* The list of test workloads */
+DECLARE_WORKLOAD(noploop);
+
#endif /* TESTS_H */
diff --git a/tools/perf/tests/workloads/Build b/tools/perf/tests/workloads/Build
new file mode 100644
index 000000000000..f98e968d4633
--- /dev/null
+++ b/tools/perf/tests/workloads/Build
@@ -0,0 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0
+
+perf-y += noploop.o
diff --git a/tools/perf/tests/workloads/noploop.c b/tools/perf/tests/workloads/noploop.c
new file mode 100644
index 000000000000..9e4d8d024259
--- /dev/null
+++ b/tools/perf/tests/workloads/noploop.c
@@ -0,0 +1,32 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#include <stdlib.h>
+#include <signal.h>
+#include <unistd.h>
+#include <linux/compiler.h>
+#include "../tests.h"
+
+static volatile int done;
+
+static void sighandler(int sig __maybe_unused)
+{
+ done = 1;
+}
+
+static int noploop(int argc, const char **argv)
+{
+ int sec = 1;
+
+ if (argc > 0)
+ sec = atoi(argv[0]);
+
+ signal(SIGINT, sighandler);
+ signal(SIGALRM, sighandler);
+ alarm(sec);
+
+ while (!done)
+ continue;
+
+ return 0;
+}
+
+DEFINE_WORKLOAD(noploop);
--
2.38.1.431.g37b22c650d-goog
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