From: xuehai zhang <hai@cs.uchicago.edu>
To: Adam Heath <doogie@brainfood.com>
Cc: "xen-devel@lists.xensource.com" <xen-devel@lists.xensource.com>,
Tim Freeman <tfreeman@mcs.anl.gov>,
"keahey@mcs.anl.gov" <keahey@mcs.anl.gov>,
"Santos, Jose Renato G" <joserenato.santos@hp.com>
Subject: Re: question about disk performance in domU
Date: Mon, 21 Nov 2005 17:58:00 -0600 [thread overview]
Message-ID: <43825F08.4020803@cs.uchicago.edu> (raw)
In-Reply-To: <Pine.LNX.4.58.0511211650400.28927@gradall.private.brainfood.com>
Adam,
I don't know much about how hdparm really works. Are you suggesting dom0's file buffer cache should
be flushed by default every time because hdparm calls an ioctl to flush? If it is not the case, how
does the data used by hdparm in domU get into the dom0's file buffer cache in the 1st run?
Thanks.
Xuehai
Adam Heath wrote:
> On Mon, 21 Nov 2005, xuehai zhang wrote:
>
>
>>Renato and Tim,
>>Thank you for your replies.
>>Is there anyway to flush the dom0 file buffer before running hdparm on domU each time?
>
>
> hdparm calls an ioctl to flush it. Maybe that should be passed thru.
>
next prev parent reply other threads:[~2005-11-21 23:58 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-11-21 22:26 question about disk performance in domU Santos, Jose Renato G
2005-11-21 22:41 ` xuehai zhang
2005-11-21 22:51 ` Adam Heath
2005-11-21 23:58 ` xuehai zhang [this message]
-- strict thread matches above, loose matches on Subject: below --
2005-11-21 15:41 xuehai zhang
2005-11-21 20:45 ` Tim Freeman
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=43825F08.4020803@cs.uchicago.edu \
--to=hai@cs.uchicago.edu \
--cc=doogie@brainfood.com \
--cc=joserenato.santos@hp.com \
--cc=keahey@mcs.anl.gov \
--cc=tfreeman@mcs.anl.gov \
--cc=xen-devel@lists.xensource.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.