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From: Jens Axboe <jens.axboe@oracle.com>
To: Linux Kernel <linux-kernel@vger.kernel.org>, heiko.carstens@de.ibm.com
Cc: David Miller <davem@davemloft.net>
Subject: inlined spinlocks on sparc64
Date: Thu, 13 Aug 2009 10:20:58 +0200	[thread overview]
Message-ID: <20090813082058.GX12579@kernel.dk> (raw)

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


             reply	other threads:[~2009-08-13  8:20 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-08-13  8:20 Jens Axboe [this message]
2009-08-13  9:08 ` inlined spinlocks on sparc64 David Miller
2009-08-13 11:56   ` Jens Axboe
2009-08-13 17:08 ` Heiko Carstens

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