From: RW <kvm@tauceti.net>
To: kvm@vger.kernel.org
Subject: Re: KVM and cpu limiting
Date: Fri, 02 Jul 2010 10:02:03 +0200 [thread overview]
Message-ID: <4C2D9CFB.8090402@tauceti.net> (raw)
In-Reply-To: <AANLkTilSqBK0_PgqBPzPZEqGDbA2vU1s1YfUNHZm_zOt@mail.gmail.com>
> Is it possible to limit cpu usage be VM when using qemu+kvm?
>
First thing you can do is to only provide one or two
virtual CPUs to a VM. This is normally a not to bad
way to limit CPU usage. But maybe cgroups can help
you more:
http://www.mjmwired.net/kernel/Documentation/cgroups.txt
> I need one server to run a lot of VMs (much more than cpu cores I
> have). Each VM must have it's guaranted cpu time or time slice it must
> use.
>
> Is it possible to make such limits? Is it possible to modify
> /proc/cpuinfo of VMs?
>
>
You can start Qemu/KVM with different "-cpu" parameter:
bern:~ # qemu-kvm -cpu ?
x86 qemu64
x86 phenom
x86 core2duo
x86 kvm64
x86 qemu32
x86 coreduo
x86 486
x86 pentium
x86 pentium2
x86 pentium3
x86 athlon
x86 n270
Or just provied "-cpu host". Then you get the same output
inside the guest as the host.
- Robert
prev parent reply other threads:[~2010-07-02 8:02 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-07-02 6:23 KVM and cpu limiting Boris Dolgov
[not found] ` <AANLkTinbGi6LOu01xySOiqfml-VFG5TYt7ovXVn7hVlR@mail.gmail.com>
2010-07-02 7:57 ` Fwd: " Srivatsa Vaddagiri
2010-07-02 16:38 ` Boris Dolgov
2010-07-06 4:39 ` Srivatsa Vaddagiri
2010-07-02 8:02 ` RW [this message]
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