From: Arjan van de Ven <arjan@infradead.org>
To: Ingo Molnar <mingo@elte.hu>
Cc: Tobias Doerffel <tobias.doerffel@gmail.com>,
"H. Peter Anvin" <hpa@zytor.com>, Willy Tarreau <w@1wt.eu>,
Thomas Gleixner <tglx@linutronix.de>,
Suresh Siddha <suresh.b.siddha@intel.com>,
"Pallipadi, Venkatesh" <venkatesh.pallipadi@intel.com>,
LKML <linux-kernel@vger.kernel.org>
Subject: Re: Specific support for Intel Atom architecture
Date: Mon, 4 May 2009 06:32:58 -0700 [thread overview]
Message-ID: <20090504063258.00d035b2@infradead.org> (raw)
In-Reply-To: <20090504131457.GA25844@elte.hu>
On Mon, 4 May 2009 15:14:57 +0200
Ingo Molnar <mingo@elte.hu> wrote:
>
> * Tobias Doerffel <tobias.doerffel@gmail.com> wrote:
>
> > Am Sonntag, 3. Mai 2009 08:48:54 schrieb H. Peter Anvin:
> > > Willy Tarreau wrote:
> > > >> $(call cc-option,-march=atom,-march=i686)
> > > >
> > > > if it's an in-order architecture, wouldn't it be better to tune
> > > > for i386 or i486 instead ?
> > >
> > > Possibly. It would be worth measuring.
> >
> > How would one do that (never benchmarked kernel stuff before)?
>
> A standard method is to run lmbench and compare the results -
> lmbench has a built-in 'report comparison between two runs' feature.
well... you're normally REALLY hard pressed to measure compiler
differences this way.....
normally compiler options get benchmarked using speccpu and the like....
--
Arjan van de Ven Intel Open Source Technology Centre
For development, discussion and tips for power savings,
visit http://www.lesswatts.org
next prev parent reply other threads:[~2009-05-04 13:31 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-04-30 12:08 Specific support for Intel Atom architecture Tobias Doerffel
2009-04-30 15:40 ` Ingo Molnar
2009-04-30 17:03 ` H. Peter Anvin
2009-04-30 17:10 ` H. Peter Anvin
2009-05-03 5:38 ` Willy Tarreau
2009-05-03 6:48 ` H. Peter Anvin
2009-05-03 11:08 ` Tobias Doerffel
2009-05-04 13:14 ` Ingo Molnar
2009-05-04 13:32 ` Arjan van de Ven [this message]
2009-05-04 17:55 ` Ingo Molnar
2009-05-03 14:53 ` Arjan van de Ven
2009-05-03 18:30 ` Willy Tarreau
2009-05-03 18:37 ` H. Peter Anvin
2009-05-03 19:38 ` Måns Rullgård
2009-05-04 7:22 ` Andi Kleen
2009-05-11 21:30 ` Tobias Doerffel
2009-05-12 6:53 ` Andi Kleen
2009-05-12 14:20 ` Ulrich Drepper
2009-05-12 15:04 ` Andi Kleen
2009-05-12 17:45 ` Ulrich Drepper
2009-05-12 18:13 ` Andi Kleen
2009-05-14 5:04 ` Harvey Harrison
2009-05-14 13:38 ` Ulrich Drepper
2009-05-14 14:01 ` Andi Kleen
2009-05-14 16:19 ` Ulrich Drepper
2009-05-14 17:29 ` Andi Kleen
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