From: Marcelo Tosatti <mtosatti@redhat.com>
To: Alejandro Comisario <alejandro.comisario@mercadolibre.com>
Cc: kvm@vger.kernel.org
Subject: Re: kvm cpu usage allocation
Date: Thu, 20 Feb 2014 20:00:10 -0300 [thread overview]
Message-ID: <20140220230010.GA16298@amt.cnet> (raw)
In-Reply-To: <CAMrG31zA6G-LyoxePODPZYHKmtWh1_U_eVyUR5_7xF+jO-c-sg@mail.gmail.com>
On Wed, Feb 19, 2014 at 06:42:56PM -0300, Alejandro Comisario wrote:
> Hi everyone.
> We are having a private cloud with more than 1000 phy servers.
> Each server has 128GB of RAM and 24 cores (2 heaxacores with HT
> enabled), but the amount of vms running on those servers versus the
> flavor (amount of CPU) made us use about 80 VCPUS.
>
> The questions are as follow.
>
> * is there a fine documentation of HOW kvm handles cpu allocation/pin
> per vm in an scenario like this one ?
> * is there also, a documentation that explains under a circumstance
> where a VM needs more processing power, how priority is managed ?
> * is there a way to define some kind of politics or rules to have
> specific cpu pinning for specific vms ?
Hi Alejandro,
Check "Chapter 7. Overcommitting with KVM" of
https://access.redhat.com/site/documentation/en-US/Red_Hat_Enterprise_Linux/6/html/Virtualization_Administration_Guide/chap-Virtualization-Tips_and_tricks-Overcommitting_with_KVM.html
prev parent reply other threads:[~2014-02-21 2:28 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-02-19 21:42 kvm cpu usage allocation Alejandro Comisario
2014-02-20 14:31 ` Alejandro Comisario
2014-02-20 23:00 ` Marcelo Tosatti [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=20140220230010.GA16298@amt.cnet \
--to=mtosatti@redhat.com \
--cc=alejandro.comisario@mercadolibre.com \
--cc=kvm@vger.kernel.org \
/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