[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-Id: <20091110.015023.244106360.mitake@dcl.info.waseda.ac.jp>
Date: Tue, 10 Nov 2009 01:50:23 +0900 (JST)
From: Hitoshi Mitake <mitake@....info.waseda.ac.jp>
To: mingo@...e.hu
Cc: linux-kernel@...r.kernel.org, rusty@...tcorp.com.au,
tglx@...utronix.de, a.p.zijlstra@...llo.nl, efault@....de,
acme@...hat.com, fweisbec@...il.com
Subject: Re: [PATCH v2 3/7] Adding general performance benchmarking
subcommand to perf.
From: Ingo Molnar <mingo@...e.hu>
Subject: Re: [PATCH v2 3/7] Adding general performance benchmarking subcommand to perf.
Date: Mon, 9 Nov 2009 08:55:12 +0100
>
> * Hitoshi Mitake <mitake@....info.waseda.ac.jp> wrote:
>
> > From: Ingo Molnar <mingo@...e.hu>
> > Subject: Re: [PATCH v2 3/7] Adding general performance benchmarking subcommand to perf.
> > Date: Sun, 8 Nov 2009 12:30:13 +0100
> >
> > > > >
> > > > > 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
> > > > >
> > > > > ?
> > > >
> > > > I have to admit that single float value output is too simple.
> > > > So I'll fix the default output.
> > > >
> > > > But, I believe that simple form makes sense for
> > > > processing by scripts or graph tools like gnuplot.
> > > > I'll add the option (may be --simple) to switch
> > > > friendliness of outputs.
> > >
> > > Btw., could you make it Git-ish, i.e.:
> > >
> > > --format=short
> > >
> > > or:
> > >
> > > --format=simple
> > >
> > > Eventually more format options might be added.
> >
> > It's good idea.
> > I have to admit that reserving -s for simple output is not good idea.
> > I'll do this.
>
> I think --format=simple will be used by scripts mostly, so it doesnt
> matter that it's longer to type. We try to save the shorter options for
> humans and be conservative with them.
>
> Another angle is coherency between different subcommands - and '-s' is
> already used as -s/--sort in other perf subcommands, which does not
> match up with the '-s/--simple' usage.
>
> We try to match what the Git project does here - a good deal of
> infrastructure code in perf came from Git and i find Git very easy to
> use and it's managed well.
>
> It's not a hard rule: not all option name incoherencies are fixable or
> avoidable, and there's no big problem if something slips in - i just
> wanted to mention so that you can keep an eye on it when developing new
> features for perf bench.
>
> Ingo
>
I added --format as option of bench subcommand,
not of each suites.
Because I thought that flavors of formatting are common thing
across the suites.
Example of use:
% ./perf bench sched pipe # with no style specify
(executing 1000000 pipe operations between two tasks)
Total time:5.855 sec
5.855061 usecs/op
170792 ops/sec
% ./perf bench --format=simple sched pipe # specified simple
^^^^^^^^^^^^^^^ # <- --format is here
5.988
How do you think?
I'll send patch series later.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists