linux-kernel - [tip:perf/core] perf evlist: Remove obsolete dummy execve

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Message-ID: <tip-5c6974f49832a55edc9ca744323778947c104ca0@git.kernel.org>
Date:	Mon, 12 Aug 2013 03:19:47 -0700
From:	tip-bot for Andi Kleen <tipbot@...or.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	acme@...hat.com, linux-kernel@...r.kernel.org, eranian@...gle.com,
	hpa@...or.com, mingo@...nel.org, jolsa@...hat.com,
	ak@...ux.intel.com, tglx@...utronix.de
Subject: [tip:perf/core] perf evlist: Remove obsolete dummy execve

Commit-ID:  5c6974f49832a55edc9ca744323778947c104ca0
Gitweb:     http://git.kernel.org/tip/5c6974f49832a55edc9ca744323778947c104ca0
Author:     Andi Kleen <ak@...ux.intel.com>
AuthorDate: Fri, 2 Aug 2013 17:41:09 -0700
Committer:  Arnaldo Carvalho de Melo <acme@...hat.com>
CommitDate: Wed, 7 Aug 2013 17:35:28 -0300

perf evlist: Remove obsolete dummy execve

Minor cleanup.

The dummy execve to pre-resolve the PLT is obsolete since
"enable_on_execve" was added. The counters are only
running after the execve anyways. So just remove it.

Signed-off-by: Andi Kleen <ak@...ux.intel.com>
Reviewed-by: Jiri Olsa <jolsa@...hat.com>
Cc: Jiri Olsa <jolsa@...hat.com>
Cc: Stephane Eranian <eranian@...gle.com>
Link: http://lkml.kernel.org/r/1375490473-1503-2-git-send-email-andi@firstfloor.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
 tools/perf/util/evlist.c | 7 -------
 1 file changed, 7 deletions(-)

diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
index da2dd92..c7d111f 100644
--- a/tools/perf/util/evlist.c
+++ b/tools/perf/util/evlist.c
@@ -837,13 +837,6 @@ int perf_evlist__prepare_workload(struct perf_evlist *evlist,
 		fcntl(go_pipe[0], F_SETFD, FD_CLOEXEC);
 
 		/*
-		 * Do a dummy execvp to get the PLT entry resolved,
-		 * so we avoid the resolver overhead on the real
-		 * execvp call.
-		 */
-		execvp("", (char **)argv);
-
-		/*
 		 * Tell the parent we're ready to go
 		 */
 		close(child_ready_pipe[1]);
--
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