From: Ming Lei <ming.lei@canonical.com>
To: Peter Maydell <peter.maydell@linaro.org>,
qemu-devel@nongnu.org, Paolo Bonzini <pbonzini@redhat.com>,
Stefan Hajnoczi <stefanha@redhat.com>
Cc: Kevin Wolf <kwolf@redhat.com>, Fam Zheng <famz@redhat.com>,
"Michael S. Tsirkin" <mst@redhat.com>
Subject: [Qemu-devel] [PATCH v2 0/3] linux-aio: introduce submit I/O at batch
Date: Tue, 1 Jul 2014 15:51:56 +0800 [thread overview]
Message-ID: <1404201119-6646-1-git-send-email-ming.lei@canonical.com> (raw)
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.
V2:
- define return value of bdrv_io_unplug as void, suggested by Paolo
- avoid busy-wait for handling io_submit
V1:
- move queuing io stuff into linux-aio.c as suggested by Paolo
Thanks,
--
Ming Lei
next reply other threads:[~2014-07-01 7:52 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-07-01 7:51 Ming Lei [this message]
2014-07-01 7:51 ` [Qemu-devel] [PATCH v2 1/3] block: block: introduce bdrv_io_plug() and bdrv_io_unplug() Ming Lei
2014-07-01 11:18 ` Kevin Wolf
2014-07-01 13:31 ` Ming Lei
2014-07-01 14:39 ` Ming Lei
2014-07-01 15:21 ` Kevin Wolf
2014-07-01 16:56 ` Paolo Bonzini
2014-07-02 0:46 ` Ming Lei
2014-07-02 2:35 ` Ming Lei
2014-07-02 8:18 ` Paolo Bonzini
2014-07-02 8:38 ` Kevin Wolf
2014-07-02 8:49 ` Paolo Bonzini
2014-07-02 8:39 ` Ming Lei
2014-07-02 8:56 ` Paolo Bonzini
2014-07-02 9:12 ` Kevin Wolf
2014-07-02 9:29 ` Ming Lei
2014-07-02 9:49 ` Kevin Wolf
2014-07-02 10:02 ` Ming Lei
2014-07-02 10:24 ` Paolo Bonzini
2014-07-02 10:28 ` Ming Lei
2014-07-02 9:26 ` Ming Lei
2014-07-01 7:51 ` [Qemu-devel] [PATCH v2 2/3] linux-aio: implement io plug and unplug Ming Lei
2014-07-01 7:51 ` [Qemu-devel] [PATCH v2 3/3] dataplane: submit I/O at batch Ming Lei
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