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Message-ID: <50E69F67.6050407@kernel.dk> Date: Fri, 04 Jan 2013 10:22:47 +0100 From: Jens Axboe <axboe@...nel.dk> To: Kent Overstreet <koverstreet@...gle.com> CC: linux-kernel@...r.kernel.org, linux-aio@...ck.org, linux-fsdevel@...r.kernel.org, zab@...hat.com, bcrl@...ck.org, jmoyer@...hat.com, viro@...iv.linux.org.uk, tytso@....edu Subject: Re: [PATCH 00/32] AIO performance improvements/cleanups, v3 On 2012-12-27 02:59, Kent Overstreet wrote: > Last posting: http://article.gmane.org/gmane.linux.kernel.aio.general/3242 > > As before, changes should mostly be noted in the patch descriptions. > > Some random bits: > * flush_dcache_page() patch is new > * Rewrote the aio_read_evt() stuff again > * Fixed a few comments > * Included some more patches, notably the batch completion stuff > > My git repo has Jens' aio/dio patches on top of this stuff. As of the > latest version, I'm seeing a couple percent better throughput with the > ring buffer, and I think Jens was seeing a couple percent better with > his linked list approach - at this point I think the difference is > noise, we're both testing with fairly crappy drivers. I still see 10-15% better performance with my non-ring method, so it's a bit faster than that. That's on the single device, driving that to the maximum. -- Jens Axboe -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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