From: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
To: "Duan, Ronghui" <ronghui.duan@intel.com>
Cc: "Stefano.Stabellini@eu.citrix.com"
<Stefano.Stabellini@eu.citrix.com>,
"Ian.Jackson@eu.citrix.com" <Ian.Jackson@eu.citrix.com>,
"xen-devel@lists.xen.org" <xen-devel@lists.xen.org>
Subject: Re: [RFC v1 0/5] VBD: enlarge max segment per request in blkfront
Date: Thu, 13 Sep 2012 09:21:55 -0400 [thread overview]
Message-ID: <20120913132153.GC16635@localhost.localdomain> (raw)
In-Reply-To: <A21691DE07B84740B5F0B81466D5148A23BF6833@SHSMSX102.ccr.corp.intel.com>
On Thu, Sep 13, 2012 at 02:28:12AM +0000, Duan, Ronghui wrote:
> > form xentop.
> > > Read 1K random IOPS Dom0 CPU DomU CPU%
> > > W 52005.9 86.6 71
> > > W/O 52123.1 85.8 66.9
> >
> > So I am getting some different numbers. I tried a simple 4K read:
> >
> > [/dev/xvda1]
> > bssplit=4K
> > rw=read
> > direct=1
> > size=4g
> > ioengine=libaio
> > iodepth=64
> >
> > And with your patch got:
> > read : io=4096.0MB, bw=92606KB/s, iops=23151 , runt= 45292msec
> >
> > without:
> > read : io=4096.0MB, bw=145187KB/s, iops=36296 , runt= 28889msec
> >
> What type of backend file you are using? In order to remove the influence of cache in Dom0, I use a physical partition as backend.
> In code level, although there is some overhead in my patch compared to original, but it should not to be so big. :)
Right :-)
phy:/dev/sda,xvda,w
The sda is a Corsair SSD.
prev parent reply other threads:[~2012-09-13 13:21 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-08-16 10:22 [RFC v1 0/5] VBD: enlarge max segment per request in blkfront Duan, Ronghui
2012-08-16 11:14 ` Jan Beulich
2012-08-17 1:12 ` Duan, Ronghui
2012-08-16 13:34 ` Konrad Rzeszutek Wilk
2012-08-16 13:55 ` Konrad Rzeszutek Wilk
2012-08-17 1:26 ` Duan, Ronghui
2012-08-16 14:18 ` Jan Beulich
2012-09-07 17:49 ` Konrad Rzeszutek Wilk
2012-09-13 2:28 ` Duan, Ronghui
2012-09-13 7:32 ` Jan Beulich
2012-09-13 11:05 ` Stefano Stabellini
2012-09-13 13:23 ` Konrad Rzeszutek Wilk
2012-09-13 14:05 ` Duan, Ronghui
2012-09-17 6:33 ` Duan, Ronghui
2012-09-17 14:37 ` Konrad Rzeszutek Wilk
2012-09-19 21:11 ` Konrad Rzeszutek Wilk
2012-09-13 13:21 ` Konrad Rzeszutek Wilk [this message]
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