Messages in this thread | | | Date | Tue, 3 Nov 2009 18:29:26 +0100 | From | Ingo Molnar <> | Subject | Re: [PATCH v2 3/7] Adding general performance benchmarking subcommand to perf. |
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* Hitoshi Mitake <mitake@dcl.info.waseda.ac.jp> 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. > http://people.redhat.com/mingo/cfs-scheduler/tools/pipe-test-1m.c > > 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" > 0.024
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 218579 ops/sec
?
Ingo
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