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Date: Thu, 3 Jul 2014 11:25:06 +0200
From: Kevin Wolf <kwolf@redhat.com>
Message-ID: <20140703092506.GB4322@noname.redhat.com>
References: <1404303528-7115-1-git-send-email-ming.lei@canonical.com>
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Subject: Re: [Qemu-devel] [PATCH v4 0/3] linux-aio: introduce submit I/O as
	a batch
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To: Ming Lei <ming.lei@canonical.com>
Cc: Peter Maydell <peter.maydell@linaro.org>, Fam Zheng <famz@redhat.com>, "Michael S. Tsirkin" <mst@redhat.com>, qemu-devel@nongnu.org, Stefan Hajnoczi <stefanha@redhat.com>, Paolo Bonzini <pbonzini@redhat.com>

Am 02.07.2014 um 14:18 hat Ming Lei geschrieben:
> Hi,
> 
> The commit 580b6b2aa2(dataplane: use the QEMU block layer for I/O)
> introduces ~40% throughput regression on virtio-blk dataplane, and
> one of causes is that submitting I/O as a batch is removed.
> 
> This patchset trys to introduce this mechanism on block, at least,
> linux-aio can benefit from that.
> 
> With these patches, it is observed that thoughout on virtio-blk
> dataplane can be improved a lot, see data in commit log of patch
> 3/3.
> 
> It should be possible to apply the batch mechanism to other devices
> (such as virtio-scsi) too.

This series doesn't seem to apply cleanly on current master. Can you
rebase, please? Meanwhile, I'll try reviewing the patches as good as
it's possibly when they don't apply.

Kevin