linux-kernel - Re: [PATCH 0/3] tracing/perf: perf_trace_buf/perf

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Date:	Thu, 20 Jun 2013 12:35:28 -0600
From:	David Ahern <dsahern@...il.com>
To:	Steven Rostedt <rostedt@...dmis.org>
CC:	Oleg Nesterov <oleg@...hat.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Ingo Molnar <mingo@...hat.com>,
	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>,
	Srikar Dronamraju <srikar@...ux.vnet.ibm.com>,
	"zhangwei(Jovi)" <jovi.zhangwei@...wei.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 0/3] tracing/perf: perf_trace_buf/perf_xxx hacks.

On 6/20/13 12:23 PM, Steven Rostedt wrote:
>
> I ran this:
>
>   perf stat --repeat 100 -- perf bench sched pipe > /tmp/perf-bench-sched.{before, after}

You want to compare:
   perf stat --repeat 100 -p 1 -- perf bench sched pipe

so that event is tagged to pid 1 and not the perf-bench workload.

David
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