linux-kernel - Re: [PATCH] new irq tracer

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Date:	Thu, 26 Feb 2009 16:40:13 +0100
From:	Peter Zijlstra <peterz@...radead.org>
To:	Jason Baron <jbaron@...hat.com>
Cc:	Mathieu Desnoyers <compudj@...stal.dyndns.org>, mingo@...e.hu,
	Masami Hiramatsu <mhiramat@...hat.com>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	"Frank Ch. Eigler" <fche@...hat.com>, rostedt@...dmis.org,
	linux-kernel@...r.kernel.org, acme@...stprotocols.net,
	fweisbec@...il.com
Subject: Re: [PATCH] new irq tracer

On Thu, 2009-02-26 at 10:11 -0500, Jason Baron wrote:
> 
> Using Steve's new 'DEFINE_TRACE_FMT', I can get function graph trace
> as follows using the original two tracepoints (patch below):
> 
>  3)               |                      handle_IRQ_event() {
>  3)               |                        /* (irq_handler_entry) irq=28 handler=eth0 */
>  3)               |                        e1000_intr_msi() {
>  3)   2.460 us    |                          __napi_schedule();
>  3)   9.416 us    |                        }
>  3)               |                        /* (irq_handler_exit) irq=28 handler=eth0 return=handled */
>  3) + 22.935 us   |                      }
> 
> thanks,
> 
> -Jason
> 
> 
> Signed-off-by: Jason Baron <jbaron@...hat.com>

Looks good, thanks Jason!

Acked-by: Peter Zijlstra <a.p.zijlstra@...llo.nl>


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