From: Avi Kivity <avi@redhat.com>
To: Badari Pulavarty <pbadari@us.ibm.com>
Cc: Anthony Liguori <anthony@codemonkey.ws>, kvm@vger.kernel.org
Subject: Re: [RFC] vhost-blk implementation
Date: Tue, 23 Mar 2010 12:05:10 +0200 [thread overview]
Message-ID: <4BA89256.4030100@redhat.com> (raw)
In-Reply-To: <4BA82C5B.8010808@us.ibm.com>
On 03/23/2010 04:50 AM, Badari Pulavarty wrote:
> Anthony Liguori wrote:
>> On 03/22/2010 08:45 PM, Badari Pulavarty wrote:
>>> Anthony Liguori wrote:
>>>> On 03/22/2010 08:00 PM, Badari Pulavarty wrote:
>>>>> Forgot to CC: KVM list earlier
>>>>
>>>>
>>>> These virtio results are still with a 2.6.18 kernel with no aio,
>>>> right?
>>> Results are on 2.6.33-rc8-net-next kernel. But not using AIO.
>>
>> Can you try with aio and cache=none?
>
> aio-native,cache=none
>
> # time dd if=/dev/vda of=/dev/null bs=128k iflag=direct
> 640000+0 records in
> 640000+0 records out
> 83886080000 bytes (84 GB) copied, 470.588 seconds, 170 MB/s
>
You're effectively killing readahead with this. Please use fio with a
sequential pattern, queue depth > 1.
--
error compiling committee.c: too many arguments to function
next prev parent reply other threads:[~2010-03-23 10:05 UTC|newest]
Thread overview: 47+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-03-23 1:00 [RFC] vhost-blk implementation Badari Pulavarty
2010-03-23 1:16 ` Anthony Liguori
2010-03-23 1:45 ` Badari Pulavarty
2010-03-23 2:00 ` Anthony Liguori
2010-03-23 2:50 ` Badari Pulavarty
2010-03-23 10:05 ` Avi Kivity [this message]
2010-03-23 14:48 ` Badari Pulavarty
2010-03-23 10:03 ` Avi Kivity
2010-03-23 14:55 ` Badari Pulavarty
2010-03-23 16:53 ` Avi Kivity
2010-03-24 20:05 ` Christoph Hellwig
2010-03-25 6:29 ` Avi Kivity
2010-03-25 15:48 ` Christoph Hellwig
2010-03-25 15:51 ` Avi Kivity
2010-03-25 15:00 ` Asdo
2010-04-05 19:59 ` Christoph Hellwig
2010-04-07 0:36 ` [RFC] vhost-blk implementation (v2) Badari Pulavarty
2010-04-07 0:36 ` Badari Pulavarty
2010-03-23 10:09 ` [RFC] vhost-blk implementation Eran Rom
2010-03-24 20:04 ` Christoph Hellwig
2010-03-24 20:22 ` Badari Pulavarty
2010-03-25 7:57 ` Avi Kivity
2010-03-25 14:36 ` Badari Pulavarty
2010-03-25 15:57 ` Christoph Hellwig
2010-03-26 18:53 ` Eran Rom
2010-04-08 16:17 ` Stefan Hajnoczi
2010-04-05 19:23 ` Christoph Hellwig
2010-04-05 23:17 ` Badari Pulavarty
2010-03-24 20:27 ` Badari Pulavarty
2010-03-29 15:41 ` Badari Pulavarty
2010-03-29 18:20 ` Chris Wright
2010-03-29 20:37 ` Avi Kivity
2010-03-29 22:51 ` Badari Pulavarty
2010-03-29 23:56 ` Chris Wright
2010-03-30 12:43 ` Avi Kivity
2010-04-05 14:22 ` Stefan Hajnoczi
2010-04-06 2:27 ` Badari Pulavarty
-- strict thread matches above, loose matches on Subject: below --
2010-03-23 0:34 Badari Pulavarty
2010-03-23 12:39 ` Michael S. Tsirkin
2010-03-23 14:47 ` Badari Pulavarty
2010-03-23 17:57 ` Badari Pulavarty
2010-03-23 18:06 ` Michael S. Tsirkin
2010-03-23 19:55 ` Badari Pulavarty
2010-03-24 9:52 ` Michael S. Tsirkin
2010-03-24 11:23 ` Michael S. Tsirkin
2010-03-24 17:58 ` Badari Pulavarty
2010-03-24 18:28 ` Michael S. Tsirkin
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