From: Richard Guenther <richard.guenther@gmail.com>
To: Andi Kleen <andi@firstfloor.org>
Cc: Igor Zamyatin <izamyatin@gmail.com>, gcc-patches@gcc.gnu.org
Subject: Re: [PATCH] Atom: Scheduler improvements for better imul placement
Date: Wed, 11 Apr 2012 14:10:00 -0000 [thread overview]
Message-ID: <CAFiYyc1w-+brSp_qCm40V+iawbdjz5PT5=zC=D8LBVm38q8mxQ@mail.gmail.com> (raw)
In-Reply-To: <m24nsq1j8e.fsf@firstfloor.org>
On Wed, Apr 11, 2012 at 3:38 PM, Andi Kleen <andi@firstfloor.org> wrote:
> Igor Zamyatin <izamyatin@gmail.com> writes:
>
>> Hi All!
>>
>> It is known that imul placement is rather critical for Atom processors
>> and changes try to improve imul scheduling for Atom.
>>
>> This gives +5% performance on several tests from new OA 2.0 testsuite
>> from EEMBC.
>>
>> Tested for i386 and x86-64, ok for trunk?
>
> Did you measure how much this slows down the compiler when compiling
> for Atom? The new pass looks rather slow.
Also please explain why adjusting the automaton for Atom is not a way to
attack this issue.
Richard.
> -Andi
>
> --
> ak@linux.intel.com -- Speaking for myself only
next prev parent reply other threads:[~2012-04-11 14:10 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-04-11 8:40 Igor Zamyatin
2012-04-11 13:38 ` Andi Kleen
2012-04-11 14:10 ` Richard Guenther [this message]
2012-04-12 10:20 ` Igor Zamyatin
2012-04-12 10:45 ` Richard Guenther
2012-04-12 12:00 ` Alexander Monakov
2012-04-12 12:24 ` Richard Guenther
2012-04-12 12:36 ` Igor Zamyatin
2012-04-12 12:38 ` Richard Guenther
2012-04-12 13:02 ` Andrey Belevantsev
2012-04-12 13:55 ` Richard Guenther
2012-04-12 14:03 ` Andrey Belevantsev
2012-04-12 14:22 ` Richard Guenther
2012-04-13 7:16 ` Andrey Belevantsev
2012-04-13 10:18 ` Igor Zamyatin
2012-04-13 11:00 ` Igor Zamyatin
2012-04-13 12:21 ` Andrey Belevantsev
2012-04-16 20:27 ` Igor Zamyatin
2012-04-20 12:05 ` Igor Zamyatin
2012-05-06 7:27 ` Igor Zamyatin
2012-05-28 20:20 ` Igor Zamyatin
2012-04-12 10:18 ` Igor Zamyatin
2012-05-28 21:41 Uros Bizjak
[not found] ` <0EFAB2BDD0F67E4FB6CCC8B9F87D756915E05C45@IRSMSX101.ger.corp.intel.com>
2012-05-29 19:01 ` Igor Zamyatin
2012-06-01 13:46 ` H.J. Lu
2012-06-01 17:48 ` Eric Botcazou
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