linux-kernel - Re: [tip:perfcounters/urgent] perf stat: Improve output

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Message-ID: <20090629195203.GD31577@elte.hu>
Date:	Mon, 29 Jun 2009 21:52:03 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	mingo@...hat.com, hpa@...or.com, linux-kernel@...r.kernel.org,
	jaswinder@...nel.org, jaswinderrajput@...il.com,
	tglx@...utronix.de, linux-tip-commits@...r.kernel.org,
	Paul Mackerras <paulus@...ba.org>
Subject: Re: [tip:perfcounters/urgent] perf stat: Improve output


* Peter Zijlstra <peterz@...radead.org> wrote:

> On Sat, 2009-06-27 at 17:31 +0000, tip-bot for Jaswinder Singh Rajput
> wrote:
> > Before:
> >          150708  L1-d$-stores          (scaled from 23.57%)
> >          428804  L1-d$-prefetches      (scaled from 23.47%)
> >          314446  L1-d$-prefetch-misses  (scaled from 23.42%)
> >       252626137  L1-i$-loads           (scaled from 23.24%)
> >         5297550  dTLB-load-misses      (scaled from 23.96%)
> >       106992392  branch-loads          (scaled from 23.67%)
> >         5239561  branch-load-misses    (scaled from 23.43%)
> > 
> > After:
> >         1731713  L1-d$-loads               (  14.25x scaled)
> >           44241  L1-d$-prefetches          (   3.88x scaled)
> >           21076  L1-d$-prefetch-misses     (   3.40x scaled)
> >         5789421  L1-i$-loads               (   3.78x scaled)
> >           29645  dTLB-load-misses          (   2.95x scaled)
> >          461474  branch-loads              (   6.52x scaled)
> >            7493  branch-load-misses        (  26.57x scaled)
> 
> I really rather like the before better. Its far easier to get a 
> feel for the overload factor from a fraction that from this 
> multiplier.

ok - i reverted this portion. I liked the multiplicator a bit more - 
but you seem to have a strong preference for the percentage unit.

	Ingo
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