From: Avi Kivity <avi@redhat.com>
To: Kevin Wolf <kwolf@redhat.com>
Cc: Christoph Hellwig <hch@lst.de>, qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] [PATCH] block-raw: Make cache=off default again
Date: Mon, 22 Jun 2009 14:55:37 +0300 [thread overview]
Message-ID: <4A3F7139.20401@redhat.com> (raw)
In-Reply-To: <4A3F6EA3.2010303@redhat.com>
On 06/22/2009 02:44 PM, Kevin Wolf wrote:
> I haven't done real benchmarks for some time, but my simple test cases
> like "run mke2fs on an empty image" have shown great improvement (at
> least on IDE, for virtio I haven't understood yet what influences the
> size of its requests - you should have received a private mail from Dor
> about this). Possibly we could even enable cache=off for qcow2 now.
>
> IIUC, you have a nice setup to measure block performance now. Maybe
> you'd like to let it run with qcow2 and cache=wb/none?
>
Were your refcount-combining patches merged? I don't see them, and
performance will suck without them.
--
error compiling committee.c: too many arguments to function
next prev parent reply other threads:[~2009-06-22 11:54 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-06-22 11:18 [Qemu-devel] [PATCH] block-raw: Make cache=off default again Kevin Wolf
2009-06-22 11:35 ` Christoph Hellwig
2009-06-22 11:44 ` Kevin Wolf
2009-06-22 11:55 ` Avi Kivity [this message]
2009-06-22 12:32 ` Kevin Wolf
2009-06-22 12:39 ` Avi Kivity
2009-06-22 12:50 ` Kevin Wolf
2009-06-23 10:30 ` Jamie Lokier
2009-06-23 11:46 ` Kevin Wolf
2009-06-24 21:23 ` Jamie Lokier
2009-06-25 7:31 ` Kevin Wolf
2009-06-22 13:04 ` Christoph Hellwig
2009-06-22 13:05 ` Kevin Wolf
2009-06-22 13:14 ` Avi Kivity
2009-06-22 13:08 ` Anthony Liguori
2009-06-22 13:20 ` Kevin Wolf
2009-06-22 14:00 ` Anthony Liguori
2009-06-22 13:23 ` Dor Laor
2009-06-22 13:29 ` Kevin Wolf
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