Re: [PATCH v2 3/7] Adding general performance benchmarkingsubcommand to perf.
From: Ingo Molnar
Date: Tue Nov 03 2009 - 12:29:48 EST
* Hitoshi Mitake <mitake@xxxxxxxxxxxxxxxxxxxxx> wrote:
> Adding general performance benchmarking subcommand to perf.
> This patch adds bench/sched-pipe.c.
> bench/sched-pipe.c is a benchmark program
> to measure performance of pipe() system call.
> This benchmark is based on pipe-test-1m.c by Ingo Molnar.
> Example of use:
> % perf bench sched pipe # Use default options
> 4.575 # Result is time
> % perf bench sched pipe -l 2000 # This option means "loop 2000 counts"
ok, -l makes sense.
Shouldnt we output the unit of measurement, i.e. '4.575 usecs'? Also, we
should perhaps print something like:
% perf bench sched pipe
(executing 1000000 pipe operations between two tasks)
4.575 usecs per op
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