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
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20130124144612.GC13471@pd.tnic \
--to=bp@suse.de \
--cc=hpa@zytor.com \
--cc=ling.ma.program@gmail.com \
--cc=ling.ml@alipay.com \
--cc=linux-kernel@vger.kernel.org \
--cc=mingo@kernel.org \
--cc=mingo@redhat.com \
--cc=tglx@linutronix.de \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.