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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@gmail.com>
AuthorDate: Mon, 31 Aug 2009 06:45:19 +0200
Committer: Ingo Molnar <mingo@elte.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@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>


---
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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