linux-kernel - [PATCH] perf test: Fix the cmd string comparison in perf test 6

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Date:	Tue, 15 Dec 2015 08:09:12 +0000
From:	Kaixu Xia <xiakaixu@...wei.com>
To:	<acme@...nel.org>, <mingo@...nel.org>, <jolsa@...hat.com>,
	<namhyung@...nel.org>, <masami.hiramatsu.pt@...achi.com>
CC:	<xiakaixu@...wei.com>, <linux-kernel@...r.kernel.org>,
	<wangnan0@...wei.com>
Subject: [PATCH] perf test: Fix the cmd string comparison in perf test 6

The Sleep command is "sleep.coreutils" in Yocto project, so
the command mmap filename is "sleep.coreutils" in perf test
6. Strncmp() can get the right result.

Before:
  # perf test -v 6
     6: Validate PERF_RECORD_* events & perf_sample fields       :
    --- start ---
    test child forked, pid 31717
    mmap size 1052672B
    588401125676220 0 PERF_RECORD_SAMPLE
    ...
    588402126709180 0 PERF_RECORD_EXIT(31718:31718):(31718:31718)
    PERF_RECORD_MMAP for sleep missing!
    test child finished with -1
    ---- end ----
    Validate PERF_RECORD_* events & perf_sample fields: FAILED!

After:
  # perf test -v 6
     6: Validate PERF_RECORD_* events & perf_sample fields       :
    --- start ---
    test child forked, pid 31725
    mmap size 1052672B
    588588715789540 0 PERF_RECORD_SAMPLE
    ...
    588589716825180 0 PERF_RECORD_EXIT(31726:31726):(31726:31726)
    test child finished with 0
    ---- end ----
    Validate PERF_RECORD_* events & perf_sample fields: Ok

Signed-off-by: Kaixu Xia <xiakaixu@...wei.com>
---
 tools/perf/tests/perf-record.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/perf/tests/perf-record.c b/tools/perf/tests/perf-record.c
index 7a228a2..080f41b 100644
--- a/tools/perf/tests/perf-record.c
+++ b/tools/perf/tests/perf-record.c
@@ -240,7 +240,7 @@ int test__PERF_RECORD(void)
 					bname = strrchr(mmap_filename, '/');
 					if (bname != NULL) {
 						if (!found_cmd_mmap)
-							found_cmd_mmap = !strcmp(bname + 1, cmd);
+							found_cmd_mmap = !strncmp(bname + 1, cmd, 5);
 						if (!found_libc_mmap)
 							found_libc_mmap = !strncmp(bname + 1, "libc", 4);
 						if (!found_ld_mmap)
-- 
1.8.3.4

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