All of lore.kernel.org
 help / color / mirror / Atom feed
From: ANNIE LI <annie.li@oracle.com>
To: James Harper <james.harper@bendigoit.com.au>
Cc: xen-devel@lists.xensource.com
Subject: Re: iperf problem with Windows SMP VM
Date: Wed, 21 Jan 2009 11:02:21 +0800	[thread overview]
Message-ID: <4976903D.2050100@oracle.com> (raw)
In-Reply-To: <AEC6C66638C05B468B556EA548C1A77D0155044A@trantor>


[-- Attachment #1.1: Type: text/plain, Size: 862 bytes --]

James,

Thanks a lot. I will have a test on xen3.3.1.

Thanks
Annie

James Harper wrote:
>> Hi
>>
>> I am developing Window pv network driver and hit a problem now.
>>
>> My server use Xen 3.1.4 and have 2 physical CPUs. When I create two VM
>> with 1 VCPU on a same server, iperf performance is OK between those
>>     
> two
>   
>> VM, but there is performance degradation between those 2 VM when i
>> increase VCPU from 1 to 2.
>> This problem occurs in QEMU mode too.
>>
>> Does Xen 3.1.4 has such problem or anything wrong in my configure
>>     
> file?
>   
>
> Annie,
>
> I think it would be worthwhile testing Xen-3.3.1 as I get comparable
> performance on SMP vs UP under 2003 (around 80% I think).
>
> Under XP, SMP and UP performance are much closer, due to the way
> interrupts are handled (according to the guys on the ntdev list).
>
> James
>   

[-- Attachment #1.2: Type: text/html, Size: 1361 bytes --]

[-- Attachment #2: Type: text/plain, Size: 138 bytes --]

_______________________________________________
Xen-devel mailing list
Xen-devel@lists.xensource.com
http://lists.xensource.com/xen-devel

      reply	other threads:[~2009-01-21  3:02 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-01-20  9:53 iperf problem with Windows SMP VM ANNIE LI
2009-01-20 11:01 ` James Harper
2009-01-21  3:02   ` ANNIE LI [this message]

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=4976903D.2050100@oracle.com \
    --to=annie.li@oracle.com \
    --cc=james.harper@bendigoit.com.au \
    --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.