linux-kernel - [PATCH v2 3/3] perf test: Add a runs-per-test flag

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20250107220152.1213959-4-irogers@google.com>
Date: Tue,  7 Jan 2025 14:01:52 -0800
From: Ian Rogers <irogers@...gle.com>
To: Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...hat.com>, 
	Arnaldo Carvalho de Melo <acme@...nel.org>, Namhyung Kim <namhyung@...nel.org>, 
	Mark Rutland <mark.rutland@....com>, 
	Alexander Shishkin <alexander.shishkin@...ux.intel.com>, Jiri Olsa <jolsa@...nel.org>, 
	Ian Rogers <irogers@...gle.com>, Adrian Hunter <adrian.hunter@...el.com>, 
	Kan Liang <kan.liang@...ux.intel.com>, James Clark <james.clark@...aro.org>, 
	linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH v2 3/3] perf test: Add a runs-per-test flag

To detect flakes it is useful to run tests more than once. Add a
runs-per-test flag that will run each test multiple times.

Signed-off-by: Ian Rogers <irogers@...gle.com>
---
 tools/perf/tests/builtin-test.c | 28 +++++++++++++++++-----------
 1 file changed, 17 insertions(+), 11 deletions(-)

diff --git a/tools/perf/tests/builtin-test.c b/tools/perf/tests/builtin-test.c
index 887f735da900..729740c1e5e5 100644
--- a/tools/perf/tests/builtin-test.c
+++ b/tools/perf/tests/builtin-test.c
@@ -42,6 +42,8 @@
 static bool dont_fork;
 /* Fork the tests in parallel and wait for their completion. */
 static bool sequential;
+/* Number of times each test is run. */
+static unsigned int runs_per_test = 1;
 const char *dso_to_test;
 const char *test_objdump_path = "objdump";
 
@@ -485,7 +487,7 @@ static int __cmd_test(struct test_suite **suites, int argc, const char *argv[],
 			len = strlen(test_description(*t, i));
 			if (width < len)
 				width = len;
-			num_tests++;
+			num_tests += runs_per_test;
 		}
 	}
 	child_tests = calloc(num_tests, sizeof(*child_tests));
@@ -549,16 +551,18 @@ static int __cmd_test(struct test_suite **suites, int argc, const char *argv[],
 				continue;
 			}
 
-			test_suite__for_each_test_case(*t, curr_test_case) {
-				if (!perf_test__matches(test_description(*t, curr_test_case),
-							curr_suite, argc, argv))
-					continue;
-
-				err = start_test(*t, curr_suite, curr_test_case,
-						 &child_tests[child_test_num++],
-						 width, pass);
-				if (err)
-					goto err_out;
+			for (unsigned int run = 0; run < runs_per_test; run++) {
+				test_suite__for_each_test_case(*t, curr_test_case) {
+					if (!perf_test__matches(test_description(*t, curr_test_case),
+								curr_suite, argc, argv))
+						continue;
+
+					err = start_test(*t, curr_suite, curr_test_case,
+							 &child_tests[child_test_num++],
+							 width, pass);
+					if (err)
+						goto err_out;
+				}
 			}
 		}
 		if (!sequential) {
@@ -698,6 +702,8 @@ int cmd_test(int argc, const char **argv)
 		    "Do not fork for testcase"),
 	OPT_BOOLEAN('S', "sequential", &sequential,
 		    "Run the tests one after another rather than in parallel"),
+	OPT_UINTEGER('r', "runs-per-test", &runs_per_test,
+		     "Run each test the given number of times, default 1"),
 	OPT_STRING('w', "workload", &workload, "work", "workload to run for testing, use '--list-workloads' to list the available ones."),
 	OPT_BOOLEAN(0, "list-workloads", &list_workloads, "List the available builtin workloads to use with -w/--workload"),
 	OPT_STRING(0, "dso", &dso_to_test, "dso", "dso to test"),
-- 
2.47.1.613.gc27f4b7a9f-goog