linux-kernel - Re: [PATCH] tracing/function-return-tracer: set a more human readable output

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Message-ID: <20081126003936.GA26937@elte.hu>
Date:	Wed, 26 Nov 2008 01:39:36 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Frederic Weisbecker <fweisbec@...il.com>
Cc:	Steven Rostedt <rostedt@...dmis.org>,
	Linux Kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] tracing/function-return-tracer: set a more human
	readable output


* Frederic Weisbecker <fweisbec@...il.com> wrote:

> Here is an example of trace:
> 
> sys_read() {
>   fget_light() {
>   } 526
>   vfs_read() {
>     rw_verify_area() {
>       security_file_permission() {
>         cap_file_permission() {
>         } 519
>       } 1564
>     } 2640
>     do_sync_read() {
>       pipe_read() {
>         __might_sleep() {
>         } 511
>         pipe_wait() {
>           prepare_to_wait() {
>           } 760
>           deactivate_task() {
>             dequeue_task() {
>               dequeue_task_fair() {
>                 dequeue_entity() {
>                   update_curr() {
>                     update_min_vruntime() {
>                     } 504
>                   } 1587
>                   clear_buddies() {
>                   } 512
>                   add_cfs_task_weight() {
>                   } 519
>                   update_min_vruntime() {
>                   } 511
>                 } 5602
>                 dequeue_entity() {
>                   update_curr() {
>                     update_min_vruntime() {
>                     } 496
>                   } 1631
>                   clear_buddies() {
>                   } 496
>                   update_min_vruntime() {
>                   } 527
>                 } 4580
>                 hrtick_update() {
>                   hrtick_start_fair() {
>                   } 488
>                 } 1489
>               } 13700
>             } 14949
>           } 16016
>           msecs_to_jiffies() {
>           } 496
>           put_prev_task_fair() {
>           } 504
>           pick_next_task_fair() {
>           } 489
>           pick_next_task_rt() {
>           } 496
>           pick_next_task_fair() {
>           } 489
>           pick_next_task_idle() {
>           } 489
> 
> ------------8<---------- thread 4 ------------8<----------

Wow, very nice output! :-)

I've applied them, will comment and test on them as well.

	Ingo
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