From: Paolo Bonzini <pbonzini@redhat.com>
To: Ming Lei <tom.leiming@gmail.com>, Stefan Hajnoczi <stefanha@redhat.com>
Cc: Kevin Wolf <kwolf@redhat.com>, Fam Zheng <famz@redhat.com>,
qemu-devel@nongnu.org, "Michael S. Tsirkin" <mst@redhat.com>
Subject: Re: [Qemu-devel] [regression] dataplane: throughout -40% by commit 580b6b2aa2
Date: Fri, 27 Jun 2014 23:51:37 +0200 [thread overview]
Message-ID: <53ADE769.3060903@redhat.com> (raw)
In-Reply-To: <CACVXFVPYd6Hs9k6x4pVGJpEzLgY2DAJbm02pgc-cOwQH6rhMzg@mail.gmail.com>
Il 27/06/2014 20:01, Ming Lei ha scritto:
> I just implemented plug&unplug based batching, and it is working now.
> But throughout still has no obvious improvement.
>
> Looks loading in IOthread is a bit low, so I am wondering if there is
> block point caused by Qemu QEMU block layer.
What does perf say? Also, you can try using the QEMU trace subsystem
and see where the latency goes.
Paolo
next prev parent reply other threads:[~2014-06-27 21:52 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-06-26 15:14 [Qemu-devel] [regression] dataplane: throughout -40% by commit 580b6b2aa2 Ming Lei
2014-06-26 15:29 ` Paolo Bonzini
2014-06-26 15:37 ` Ming Lei
2014-06-26 15:43 ` Paolo Bonzini
2014-06-26 15:47 ` Ming Lei
2014-06-26 15:57 ` Paolo Bonzini
2014-06-27 1:15 ` Ming Lei
2014-06-27 4:59 ` Paolo Bonzini
2014-06-27 6:23 ` Kevin Wolf
2014-06-27 7:35 ` Paolo Bonzini
2014-06-27 12:35 ` Ming Lei
2014-06-27 7:57 ` Ming Lei
2014-06-27 12:01 ` Stefan Hajnoczi
2014-06-27 12:21 ` Kevin Wolf
2014-06-27 14:50 ` Stefan Hajnoczi
2014-06-27 18:01 ` Ming Lei
2014-06-27 21:51 ` Paolo Bonzini [this message]
2014-06-28 9:58 ` Ming Lei
2014-06-30 8:08 ` Stefan Hajnoczi
2014-06-30 8:27 ` Ming Lei
2014-07-01 13:53 ` Ming Lei
2014-07-01 14:31 ` Stefan Hajnoczi
2014-07-01 14:49 ` Ming Lei
2014-07-01 16:49 ` Paolo Bonzini
2014-07-02 0:48 ` Ming Lei
2014-07-02 8:54 ` Stefan Hajnoczi
2014-07-02 9:13 ` Paolo Bonzini
2014-07-02 9:39 ` Kevin Wolf
2014-07-02 9:48 ` Paolo Bonzini
2014-07-02 10:01 ` Kevin Wolf
2014-07-02 10:23 ` Paolo Bonzini
2014-07-02 15:45 ` Ming Lei
2014-07-02 16:13 ` Ming Lei
2014-07-02 16:23 ` Paolo Bonzini
2014-07-02 16:27 ` Ming Lei
2014-07-02 16:38 ` Paolo Bonzini
2014-07-02 16:41 ` Ming Lei
2014-07-02 16:21 ` Paolo Bonzini
2014-07-03 4:54 ` Ming Lei
2014-07-03 10:29 ` Paolo Bonzini
2014-07-03 11:50 ` Ming Lei
2014-07-03 11:56 ` Paolo Bonzini
2014-07-03 12:09 ` Ming Lei
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