From: Frederic Weisbecker <fweisbec@gmail.com>
Date: Mon, 31 Aug 2009 04:45:19 +0000 (+0200)
Subject: perf tools: Resolve idle thread cmdline for perf trace
X-Git-Tag: firefly_0821_release~13000^2~22
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=3a2684ca58e06941ff00e3f096ca44f898a6d13e;p=firefly-linux-kernel-4.4.55.git

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@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
LKML-Reference: <1251693921-6579-2-git-send-email-fweisbec@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---

diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
index dd3c2e7c9a18..8247fd04745a 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) {