linux-kernel - Re: [PATCH] tools, perf: Allow the user to disable time stamps

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Message-ID: <20140325210650.GI15074@tassilo.jf.intel.com>
Date:	Tue, 25 Mar 2014 14:06:50 -0700
From:	Andi Kleen <ak@...ux.intel.com>
To:	Stephane Eranian <eranian@...gle.com>
Cc:	Andi Kleen <andi@...stfloor.org>,
	Arnaldo Carvalho de Melo <acme@...radead.org>,
	Ingo Molnar <mingo@...nel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Namhyung Kim <namhyung@...nel.org>,
	Jiri Olsa <jolsa@...hat.com>
Subject: Re: [PATCH] tools, perf: Allow the user to disable time stamps


Also here's updated data with ls -lh. 24% saving here.
The perf output is actually not that inaccurate
for this case.

% perf record  --no-time -c 100003 -p 10247 sleep 1
% ls -lh perf.data
-rw------- 1 ak users 681K Mar 25 14:04 perf.data
% perf record  -c 100003 -p 10247 sleep 1
[ perf record: Woken up 4 times to write data ]
[ perf record: Captured and wrote 0.869 MB perf.data (~37982 samples) ]
% ls -lh perf.data
-rw------- 1 ak users 893K Mar 25 14:04 perf.data

-Andi
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