Re: [PATCH 00/32] AIO performance improvements/cleanups, v3

From: Jens Axboe
Date: Fri Jan 04 2013 - 04:23:57 EST

On 2012-12-27 02:59, Kent Overstreet wrote:
> Last posting:
> 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

Jens Axboe

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