From: Borislav Petkov <bp@suse.de>
To: Ingo Molnar <mingo@kernel.org>
Cc: ling.ma.program@gmail.com, mingo@redhat.com, tglx@linutronix.de,
hpa@zytor.com, linux-kernel@vger.kernel.org,
Ma Ling <ling.ml@alipay.com>
Subject: Re: [Suggestion] [x86]: Compiler Option Os is better on latest x86
Date: Thu, 24 Jan 2013 15:46:12 +0100 [thread overview]
Message-ID: <20130124144612.GC13471@pd.tnic> (raw)
In-Reply-To: <20130124141733.GA14876@gmail.com>
On Thu, Jan 24, 2013 at 03:17:33PM +0100, Ingo Molnar wrote:
> > So our initial conclusion is Os is better than O2 for current
> > & coming x86 CPUs. If I was wrong, please correct me.
>
> Did you patch the kernel, or used CONFIG_CC_OPTIMIZE_FOR_SIZE?
>
> (there was no patch in your mail.)
Hmm, I'm not sure about -Os: 3a55fb0d9fe8e2f4594329edd58c5fd6f35a99dd
And 0.01/0.03 IPC improvement doesn't really look too persuasive IMO.
--
Regards/Gruss,
Boris.
Sent from a fat crate under my desk. Formatting is fine.
--
next prev parent reply other threads:[~2013-01-24 14:43 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-12-26 6:32 [Suggestion] [x86]: Compiler Option Os is better on latest x86 ling.ma.program
2013-01-24 14:17 ` Ingo Molnar
2013-01-24 14:46 ` Borislav Petkov [this message]
2013-01-24 14:56 ` H. Peter Anvin
2013-01-24 15:25 ` Borislav Petkov
2013-01-24 15:35 ` H. Peter Anvin
[not found] <1356939140-4113-1-git-send-email-ling.ma@alipay.com>
2012-12-31 7:52 ` Ling Ma
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