kvm.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Avi Kivity <avi@redhat.com>
To: Michael Tokarev <mjt@tls.msk.ru>
Cc: Erik Jacobson <erikj@sgi.com>, kvm@vger.kernel.org
Subject: Re: slow guest performance with build load, looking for ideas
Date: Tue, 16 Jun 2009 11:07:54 +0300	[thread overview]
Message-ID: <4A3752DA.8060203@redhat.com> (raw)
In-Reply-To: <4A3743C1.6090108@msgid.tls.msk.ru>

On 06/16/2009 10:03 AM, Michael Tokarev wrote:
>>>>> So if I understand what you're saying: best not to use kvm guests 
>>>>> for build
>>>>> servers with pre-Nehalem processors.
>>>>
>>>> pre-Nehalem / pre-Barcelona, > 4 vcpus, yes.
>>>
>>> How about 2 vcpus, and how about AMD processors ?
>>
>> 2 vcpus (or 4) should be fine.  AMD processors (Barcelona+) would be 
>> good for any number of vcpus.
> []
>
> Hmm.. that's sorta good (not so good for owners of most
> Intel CPUs -- Nehalem just started its life).  But still
> confusing.  Namely, 2..4 vcpus per GUEST or HOST -- for
> the ore-Nehalem ones? :)

4 vcpus per guest would be fine (even more should work, depending on 
workload).  Host will scale with any number of cpus.

-- 
error compiling committee.c: too many arguments to function


  reply	other threads:[~2009-06-16  8:07 UTC|newest]

Thread overview: 25+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-06-12 21:04 slow guest performance with build load, looking for ideas Erik Jacobson
2009-06-14  9:33 ` Avi Kivity
2009-06-15 14:15   ` Erik Jacobson
2009-06-15 14:24     ` Avi Kivity
2009-06-15 15:25       ` Michael Tokarev
2009-06-15 15:27         ` Avi Kivity
2009-06-16  7:03           ` Michael Tokarev
2009-06-16  8:07             ` Avi Kivity [this message]
2009-06-18 23:07   ` Erik Jacobson
2009-06-28 14:17     ` Avi Kivity
2009-06-28 19:05       ` Erik Jacobson
2009-06-28 21:28         ` Avi Kivity
2009-07-01 21:41           ` Erik Jacobson
2009-07-02  5:48             ` Avi Kivity
2009-07-02  9:41               ` Avi Kivity
2009-07-03 15:43                 ` Mark McLoughlin
2009-07-03 16:28                   ` Erik Jacobson
2009-07-09  2:36                   ` Erik Jacobson
2009-07-09  7:48                     ` Avi Kivity
2009-07-09 18:01                       ` Erik Jacobson
2009-07-12  8:38                         ` Avi Kivity
2009-07-16 12:20                           ` Jes Sorensen
2009-07-25 14:33                             ` Avi Kivity
2009-07-03 10:41   ` Matty
2009-07-05  8:07     ` Avi Kivity

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=4A3752DA.8060203@redhat.com \
    --to=avi@redhat.com \
    --cc=erikj@sgi.com \
    --cc=kvm@vger.kernel.org \
    --cc=mjt@tls.msk.ru \
    /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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).