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From: Jamie Lokier <jamie@shareable.org>
To: qemu-devel@nongnu.org
Cc: aliguori@us.ibm.com, kvm@vger.kernel.org
Subject: Re: [Qemu-devel] [PATCH 0/3] Refactor AIO to allow multiple AIO implementations
Date: Tue, 23 Sep 2008 11:27:36 +0100	[thread overview]
Message-ID: <20080923102736.GA4619@shareable.org> (raw)
In-Reply-To: <1222125454-21744-1-git-send-email-ryanh@us.ibm.com>

Ryan Harper wrote:
> Addtional work has been done on top of QEMU for KVM and virtio-blk
> devices.  While virtio-blk is not yet upstream in QEMU, the AIO
> changes here provide a tremendous performance improvement (from 7.6%
> of native, to 100% of randwrite, and 3.9% of native, to 101.4% of
> native for seq write) for virtio devices with cache=off.

Is the improvement due to using linux-aio instead of (Glibc's) posix-aio?

Thanks,
-- Jamie

  parent reply	other threads:[~2008-09-23 10:27 UTC|newest]

Thread overview: 25+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-09-22 23:17 [PATCH 0/3] Refactor AIO to allow multiple AIO implementations Ryan Harper
2008-09-22 23:17 ` [PATCH 1/3] Only call aio flush handler if set Ryan Harper
2008-09-23  2:38   ` Anthony Liguori
2008-09-23 14:26     ` [Qemu-devel] " Ryan Harper
2008-09-23 14:34       ` Anthony Liguori
2008-09-23 14:41         ` Ryan Harper
2008-09-23 14:50           ` Anthony Liguori
2008-09-22 23:17 ` [PATCH 2/3] Move aio implementation out of raw block driver Ryan Harper
2008-09-23  1:16   ` Ryan Harper
2008-09-23  2:45   ` Anthony Liguori
2008-09-23 14:39     ` [Qemu-devel] " Ryan Harper
2008-09-23 14:40       ` Anthony Liguori
2008-09-23 14:53       ` Gerd Hoffmann
2008-09-23 16:06         ` Anthony Liguori
2008-09-23 18:04           ` Gerd Hoffmann
2008-09-23 18:28             ` Anthony Liguori
2008-09-24 22:31     ` Marcelo Tosatti
     [not found] ` <1222125454-21744-4-git-send-email-ryanh@us.ibm.com>
2008-09-23  1:22   ` [PATCH 3/3] Add linux aio implementation for raw block devices Ryan Harper
2008-09-23  3:32 ` [PATCH 0/3] Refactor AIO to allow multiple AIO implementations Anthony Liguori
2008-09-23 14:43   ` [Qemu-devel] " Ryan Harper
2008-09-23 14:47     ` Anthony Liguori
2008-09-23 16:09     ` Anthony Liguori
2008-09-23 10:27 ` Jamie Lokier [this message]
2008-10-02 22:41 ` john cooper
2008-10-03 13:33   ` Ryan Harper

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