linux-kernel - Re: [PATCH] x86 rwsem optimization extreme

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Message-ID: <87iq9v55em.fsf@basil.nowhere.org>
Date:	Thu, 18 Feb 2010 09:12:17 +0100
From:	Andi Kleen <andi@...stfloor.org>
To:	Zachary Amsden <zamsden@...hat.com>
Cc:	"H. Peter Anvin" <hpa@...or.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>, x86@...nel.org,
	Avi Kivity <avi@...hat.com>
Subject: Re: [PATCH] x86 rwsem optimization extreme

Zachary Amsden <zamsden@...hat.com> writes:
>
> Incidentally, the cost of putting all the rwsem code inline, using the
> straightforward approach, for git-tip, using defconfig on x86_64 is
> 3565 bytes / 20971778 bytes total, or 0.0168%, using gcc 4.4.3.

The nice advantage of putting lock code inline is that it gets 
accounted to the caller in all profilers.

-Andi

-- 
ak@...ux.intel.com -- Speaking for myself only.
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