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Re: [Qemu-devel] [PATCH] block-raw: Make cache=off default again
From: |
Kevin Wolf |
Subject: |
Re: [Qemu-devel] [PATCH] block-raw: Make cache=off default again |
Date: |
Mon, 22 Jun 2009 14:32:00 +0200 |
User-agent: |
Thunderbird 2.0.0.21 (X11/20090320) |
Avi Kivity schrieb:
> 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.
They were merged some weeks ago, at least if a980c98c is what you mean.
I don't have any patches for inclusion that aren't merged yet (except
for this one, obviously).
Kevin
- [Qemu-devel] [PATCH] block-raw: Make cache=off default again, Kevin Wolf, 2009/06/22
- Re: [Qemu-devel] [PATCH] block-raw: Make cache=off default again, Christoph Hellwig, 2009/06/22
- Re: [Qemu-devel] [PATCH] block-raw: Make cache=off default again, Kevin Wolf, 2009/06/22
- Re: [Qemu-devel] [PATCH] block-raw: Make cache=off default again, Avi Kivity, 2009/06/22
- Re: [Qemu-devel] [PATCH] block-raw: Make cache=off default again,
Kevin Wolf <=
- Re: [Qemu-devel] [PATCH] block-raw: Make cache=off default again, Avi Kivity, 2009/06/22
- Re: [Qemu-devel] [PATCH] block-raw: Make cache=off default again, Kevin Wolf, 2009/06/22
- Re: [Qemu-devel] [PATCH] block-raw: Make cache=off default again, Jamie Lokier, 2009/06/23
- Re: [Qemu-devel] [PATCH] block-raw: Make cache=off default again, Kevin Wolf, 2009/06/23
- Re: [Qemu-devel] [PATCH] block-raw: Make cache=off default again, Jamie Lokier, 2009/06/24
- Re: [Qemu-devel] [PATCH] block-raw: Make cache=off default again, Kevin Wolf, 2009/06/25
- Re: [Qemu-devel] [PATCH] block-raw: Make cache=off default again, Christoph Hellwig, 2009/06/22
- Re: [Qemu-devel] [PATCH] block-raw: Make cache=off default again, Kevin Wolf, 2009/06/22
- Re: [Qemu-devel] [PATCH] block-raw: Make cache=off default again, Avi Kivity, 2009/06/22
Re: [Qemu-devel] [PATCH] block-raw: Make cache=off default again, Anthony Liguori, 2009/06/22