linux-kernel - [PATCH] perf test: Print test description first

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Date: Fri, 28 Jun 2024 14:57:50 -0700
From: Namhyung Kim <namhyung@...nel.org>
To: Arnaldo Carvalho de Melo <acme@...nel.org>,
	Ian Rogers <irogers@...gle.com>,
	Kan Liang <kan.liang@...ux.intel.com>
Cc: Jiri Olsa <jolsa@...nel.org>,
	Adrian Hunter <adrian.hunter@...el.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...nel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	linux-perf-users@...r.kernel.org
Subject: [PATCH] perf test: Print test description first

Currently perf test prints the description of the test when it finishes
to run the test.  But sometimes it runs long and users want to see which
test it is running.  Change it to print the info in start_test() so that
we can see it right after the test.

No functional changes intended.

Signed-off-by: Namhyung Kim <namhyung@...nel.org>
---
 tools/perf/tests/builtin-test.c | 54 ++++++++++++++++++---------------
 1 file changed, 30 insertions(+), 24 deletions(-)

diff --git a/tools/perf/tests/builtin-test.c b/tools/perf/tests/builtin-test.c
index c3d84b67ca8e..33defd3b7185 100644
--- a/tools/perf/tests/builtin-test.c
+++ b/tools/perf/tests/builtin-test.c
@@ -243,12 +243,17 @@ static int run_test_child(struct child_process *process)
 
 static int print_test_result(struct test_suite *t, int i, int subtest, int result, int width)
 {
-	if (has_subtests(t)) {
-		int subw = width > 2 ? width - 2 : width;
+	/* If it printed other messages, print the header again. */
+	if (verbose > 1 || (verbose == 1 && result == TEST_FAIL)) {
+		if (has_subtests(t)) {
+			int subw = width > 2 ? width - 2 : width;
 
-		pr_info("%3d.%1d: %-*s:", i + 1, subtest + 1, subw, test_description(t, subtest));
-	} else
-		pr_info("%3d: %-*s:", i + 1, width, test_description(t, subtest));
+			pr_info("%3d.%1d: %-*s:", i + 1, subtest + 1, subw,
+				test_description(t, subtest));
+		} else {
+			pr_info("%3d: %-*s:", i + 1, width, test_description(t, -1));
+		}
+	}
 
 	switch (result) {
 	case TEST_OK:
@@ -282,25 +287,12 @@ static int finish_test(struct child_test *child_test, int width)
 	struct strbuf err_output = STRBUF_INIT;
 	int ret;
 
-	/*
-	 * For test suites with subtests, display the suite name ahead of the
-	 * sub test names.
-	 */
-	if (has_subtests(t) && subi == 0)
-		pr_info("%3d: %-*s:\n", i + 1, width, test_description(t, -1));
-
 	/*
 	 * Busy loop reading from the child's stdout/stderr that are set to be
 	 * non-blocking until EOF.
 	 */
 	if (!err_done)
 		fcntl(err, F_SETFL, O_NONBLOCK);
-	if (verbose > 1) {
-		if (has_subtests(t))
-			pr_info("%3d.%1d: %s:\n", i + 1, subi + 1, test_description(t, subi));
-		else
-			pr_info("%3d: %s:\n", i + 1, test_description(t, -1));
-	}
 	while (!err_done) {
 		struct pollfd pfds[1] = {
 			{ .fd = err,
@@ -330,12 +322,8 @@ static int finish_test(struct child_test *child_test, int width)
 	/* Clean up child process. */
 	ret = finish_command(&child_test->process);
 	if (verbose == 1 && ret == TEST_FAIL) {
-		/* Add header for test that was skipped above. */
-		if (has_subtests(t))
-			pr_info("%3d.%1d: %s:\n", i + 1, subi + 1, test_description(t, subi));
-		else
-			pr_info("%3d: %s:\n", i + 1, test_description(t, -1));
-		fprintf(stderr, "%s", err_output.buf);
+		/* It printed the header first, print messages in a new line */
+		fprintf(stderr, "\n%s", err_output.buf);
 	}
 	strbuf_release(&err_output);
 	print_test_result(t, i, subi, ret, width);
@@ -376,6 +364,24 @@ static int start_test(struct test_suite *test, int i, int subi, struct child_tes
 		(*child)->process.err = -1;
 	}
 	(*child)->process.no_exec_cmd = run_test_child;
+
+	if (has_subtests(test)) {
+		int subw = width > 2 ? width - 2 : width;
+
+		/*
+		 * For test suites with subtests, display the suite name ahead of the
+		 * sub test names.
+		 */
+		if (has_subtests(test) && subi == 0)
+			pr_info("%3d: %-*s:\n", i + 1, width, test_description(test, -1));
+
+		pr_info("%3d.%1d: %-*s:", i + 1, subi + 1, subw, test_description(test, subi));
+	} else
+		pr_info("%3d: %-*s:", i + 1, width, test_description(test, -1));
+
+	if (verbose > 1)
+		pr_info("\n");
+
 	err = start_command(&(*child)->process);
 	if (err || !sequential)
 		return  err;
-- 
2.45.2.803.g4e1b14247a-goog