linux-kernel - inlined spinlocks on sparc64

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Message-ID: <20090813082058.GX12579@kernel.dk>
Date:	Thu, 13 Aug 2009 10:20:58 +0200
From:	Jens Axboe <jens.axboe@...cle.com>
To:	Linux Kernel <linux-kernel@...r.kernel.org>,
	heiko.carstens@...ibm.com
Cc:	David Miller <davem@...emloft.net>
Subject: inlined spinlocks on sparc64

Hi,

I deleted the original thread, so I can't reply there. Just a heads up
on the spinlock inlining on sparc64. I decided to give your patches a
shot, since one of my IO benchmarks here basically degenerates into a
spinlock microbenchmark with > 50% time spent there (unlock part,
according to perf). Some of that is surely caching effects, but still.

For this particular workload, I get a net improvement of about 3.5% with
the inlined functions. Not bad.

-- 
Jens Axboe

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