linux-kernel - [tip:perfcounters/core] perf tools: Resolve idle thread cmdline for perf trace

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Date:	Mon, 31 Aug 2009 08:37:31 GMT
From:	tip-bot for Frederic Weisbecker <fweisbec@...il.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, acme@...hat.com, hpa@...or.com,
	mingo@...hat.com, fweisbec@...il.com, peterz@...radead.org,
	tglx@...utronix.de, mingo@...e.hu
Subject: [tip:perfcounters/core] perf tools: Resolve idle thread cmdline for perf trace

Commit-ID:  3a2684ca58e06941ff00e3f096ca44f898a6d13e
Gitweb:     http://git.kernel.org/tip/3a2684ca58e06941ff00e3f096ca44f898a6d13e
Author:     Frederic Weisbecker <fweisbec@...il.com>
AuthorDate: Mon, 31 Aug 2009 06:45:19 +0200
Committer:  Ingo Molnar <mingo@...e.hu>
CommitDate: Mon, 31 Aug 2009 10:04:48 +0200

perf tools: Resolve idle thread cmdline for perf trace

The cmd-trace tool used the cmdline file and resolved the idle
thread using a hardcoded check for the 0 task pid.

Now we have a centralized way to do that from perf using
register_idle_thread() API.

Before:
	:0-0     [000]     0.000000: irq_handler_entry: irq=0 handler=name
	:0-0     [000]     0.000000: irq_handler_entry: irq=0 handler=name

After:
	[idle]-0     [000]     0.000000: irq_handler_entry: irq=0 handler=name
	[idle]-0     [000]     0.000000: irq_handler_entry: irq=0 handler=name

Signed-off-by: Frederic Weisbecker <fweisbec@...il.com>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Arnaldo Carvalho de Melo <acme@...hat.com>
LKML-Reference: <1251693921-6579-2-git-send-email-fweisbec@...il.com>
Signed-off-by: Ingo Molnar <mingo@...e.hu>


---
 tools/perf/builtin-trace.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
index dd3c2e7..8247fd0 100644
--- a/tools/perf/builtin-trace.c
+++ b/tools/perf/builtin-trace.c
@@ -164,6 +164,7 @@ static int __cmd_trace(void)
 	char *buf;
 
 	trace_report();
+	register_idle_thread(&threads, &last_match);
 
 	input = open(input_name, O_RDONLY);
 	if (input < 0) {
--
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