From: Borislav Petkov <bp@alien8.de>
To: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@kernel.org>,
Wedson Almeida Filho <wedsonaf@gmail.com>,
Ingo Molnar <mingo@redhat.com>,
Thomas Gleixner <tglx@linutronix.de>,
x86@kernel.org, linux-kernel@vger.kernel.org,
Linus Torvalds <torvalds@linux-foundation.org>,
Andrew Morton <akpm@linux-foundation.org>,
Peter Zijlstra <a.p.zijlstra@chello.nl>
Subject: Re: [PATCH] x86: Use asm-goto to implement mutex fast path on x86-64
Date: Mon, 1 Jul 2013 16:50:50 +0200 [thread overview]
Message-ID: <20130701145050.GI23515@pd.tnic> (raw)
In-Reply-To: <07ca6bb4-2153-48ec-9171-dd7d66720d96@email.android.com>
On Mon, Jul 01, 2013 at 07:45:41AM -0700, H. Peter Anvin wrote:
> Right... brain not awake yet, sorry, and responding from my phone.
>
> I am not to worried about trading off a bit of additional branch mispredicts if everything else wins, but Ingo does have a valid question if we are measuring the right thing.
>
> The effect is definitely big enough that it would be good to understand it one way or the other.
>
> And regardless of the source... nice job!
Yeah, see my other reply. Ingo's way of tracing this doesn't show any
speedup. So I need to find out now why do I see the speedup the way I
run it.
Keep you posted.
--
Regards/Gruss,
Boris.
Sent from a fat crate under my desk. Formatting is fine.
--
prev parent reply other threads:[~2013-07-01 14:50 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-06-28 10:54 [PATCH] x86: Use asm-goto to implement mutex fast path on x86-64 Wedson Almeida Filho
2013-06-28 11:19 ` Ingo Molnar
2013-06-28 14:09 ` Borislav Petkov
2013-06-28 14:12 ` H. Peter Anvin
2013-06-28 15:15 ` Peter Zijlstra
2013-06-28 16:41 ` [PATCH] x86, cpufeature: Use new CC_HAVE_ASM_GOTO Borislav Petkov
2013-07-05 14:24 ` [tip:x86/cpu] " tip-bot for Borislav Petkov
2013-06-29 23:56 ` [PATCH] x86: Use asm-goto to implement mutex fast path on x86-64 Wedson Almeida Filho
2013-06-30 22:00 ` Borislav Petkov
2013-07-01 7:50 ` Ingo Molnar
2013-07-01 10:23 ` Borislav Petkov
2013-07-01 11:11 ` Ingo Molnar
2013-07-01 12:29 ` Borislav Petkov
2013-07-01 12:50 ` Ingo Molnar
2013-07-01 14:48 ` Borislav Petkov
2013-07-01 22:28 ` Borislav Petkov
2013-07-01 22:35 ` Wedson Almeida Filho
2013-07-01 22:44 ` Borislav Petkov
2013-07-02 6:39 ` Ingo Molnar
2013-07-02 10:29 ` Borislav Petkov
2013-07-01 14:30 ` H. Peter Anvin
2013-07-01 14:36 ` Borislav Petkov
2013-07-01 14:45 ` H. Peter Anvin
2013-07-01 14:50 ` Borislav Petkov [this message]
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