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[Qemu-devel] [PATCH 0/3] block: introduce submit I/O at batch


From: Ming Lei
Subject: [Qemu-devel] [PATCH 0/3] block: introduce submit I/O at batch
Date: Mon, 30 Jun 2014 17:49:13 +0800

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 at 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.

Thanks,
--
Ming Lei




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