From mboxrd@z Thu Jan  1 00:00:00 1970
From: Dave Hansen <haveblue-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>
Subject: Re: kvm-27 vs 28 I/O speed
Date: Mon, 16 Jul 2007 12:40:41 -0700
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Cc: kvm-devel <kvm-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org>
To: Avi Kivity <avi-atKUWr5tajBWk0Htik3J/w@public.gmane.org>
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On Sat, 2007-07-14 at 09:27 +0300, Avi Kivity wrote:
> Dave, can you compare the output of hdparm -v /dev/hda?  Maybe more
> clues there.

slow:
qemu:~# hdparm -v /dev/hda

/dev/hda:
 multcount    = 16 (on)
 IO_support   =  0 (default 16-bit)
 unmaskirq    =  0 (off)
 using_dma    =  1 (on)
 keepsettings =  0 (off)
 readonly     =  0 (off)
 readahead    = 256 (on)
 geometry     = 10402/255/63, sectors = 10485760, start = 0


fast:
qemu:~# hdparm -v /dev/hda

/dev/hda:
 multcount    = 16 (on)
 IO_support   =  0 (default 16-bit)
 unmaskirq    =  0 (off)
 using_dma    =  0 (off)
 keepsettings =  0 (off)
 readonly     =  0 (off)
 readahead    = 256 (on)
 geometry     = 10402/255/63, sectors = 10485760, start = 0


-- Dave


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