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From: Leo Yan <>
To: "Steven Rostedt (VMware)" <>,
	Arnaldo Carvalho de Melo <>,
Cc: Leo Yan <>
Subject: [PATCH] tools lib traceevent: Change tag string for error
Date: Wed, 24 Apr 2019 09:38:02 +0800	[thread overview]
Message-ID: <> (raw)

The traceevnt lib is used by perf tool, when execute 'perf test -v 6' it
outputs error log on ARM64 platform:

  running test 33 '*:*'trace-cmd: No such file or directory


  trace-cmd: Invalid argument

The trace event parsing code originally came from trace-cmd so it keeps
the tag string "trace-cmd" for errors, this easily introduces the
impression that perf tool launches trace-cmd command for trace event
parsing, but in fact the related parsing is accomplished by traceevent

This patch changes the tag string to "libtraceevent" so can avoid
confusion and let users to be more easily to connect the error with
traceevent lib.

Signed-off-by: Leo Yan <>
 tools/lib/traceevent/parse-utils.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/lib/traceevent/parse-utils.c b/tools/lib/traceevent/parse-utils.c
index 77e4ec6402dd..e99867111387 100644
--- a/tools/lib/traceevent/parse-utils.c
+++ b/tools/lib/traceevent/parse-utils.c
@@ -14,7 +14,7 @@
 void __vwarning(const char *fmt, va_list ap)
 	if (errno)
-		perror("trace-cmd");
+		perror("libtraceevent");
 	errno = 0;
 	fprintf(stderr, "  ");

             reply	other threads:[~2019-04-24  1:38 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-04-24  1:38 Leo Yan [this message]
2019-04-24 12:08 ` Steven Rostedt
2019-04-24 12:44   ` Arnaldo Carvalho de Melo
2019-04-24 12:45     ` Leo Yan
2019-05-03  5:54 ` [tip:perf/urgent] " tip-bot for Leo Yan

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