From: Arjan van de Ven <arjan@infradead.org>
To: "Ma, Ling" <ling.ma@intel.com>
Cc: Ingo Molnar <mingo@elte.hu>, Dave Jones <davej@redhat.com>,
"hpa@zytor.com" <hpa@zytor.com>,
"tglx@linutronix.de" <tglx@linutronix.de>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH RFC] [X86] Compile Option Os versus O2 on latest x86 platform
Date: Tue, 1 Dec 2009 02:14:59 -0800 [thread overview]
Message-ID: <20091201021459.43d2142a@infradead.org> (raw)
In-Reply-To: <8FED46E8A9CA574792FC7AACAC38FE7714FED213BE@PDSMSX501.ccr.corp.intel.com>
On Tue, 1 Dec 2009 16:54:04 +0800
"Ma, Ling" <ling.ma@intel.com> wrote:
> Hi Ingo
>
> Thanks for your correction, so we use perf stat --repeat 3 to test
> volano, tbench, and kbuild, Because netperf has multiple items we may
> send out later.
a key question is.. how much more memory do you have free due to -Os?
(because memory is cache is performance on a system level as well)
and how much less icache pressure is there?
--
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:[~2009-12-01 10:13 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-11-26 8:05 ling.ma
2009-11-26 9:49 ` Ingo Molnar
2009-12-01 8:54 ` Ma, Ling
2009-12-01 10:14 ` Arjan van de Ven [this message]
2009-12-01 16:11 ` H. Peter Anvin
2009-12-03 15:03 ` Ma, Ling
2009-12-03 15:05 ` H. Peter Anvin
2009-12-03 15:31 ` Ingo Molnar
2009-12-03 15:46 ` H. Peter Anvin
2009-12-02 9:47 ` Ingo Molnar
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