From: Avi Kivity <avi@redhat.com>
To: Alec Istomin <alec@openvz.org>
Cc: kvm@vger.kernel.org
Subject: Re: vCPU scalability for linux VMs
Date: Wed, 05 May 2010 11:43:32 +0300 [thread overview]
Message-ID: <4BE12FB4.1090303@redhat.com> (raw)
In-Reply-To: <1815416666.20100504184534@istomin.de>
On 05/05/2010 04:45 AM, Alec Istomin wrote:
> Gentlemen,
> Reaching out with a non-development question, sorry if it's not
> appropriate here.
>
> I'm looking for a way to improve Linux SMP VMs performance under KVM.
>
> My preliminary results show that single vCPU Linux VMs perform up to 10
> times better than 4vCPU Linux VMs (consolidated performance of 8 VMs on
> 8 core pre-Nehalem server). I suspect that I'm missing something major
> and look for any means that can help improve SMP VMs performance.
>
>
>
So you have a total of 32 vcpus on 8 cores? This is known to be
problematic. You may see some improvement by enabling hyperthreading.
There is ongoing work to improve this.
--
error compiling committee.c: too many arguments to function
next prev parent reply other threads:[~2010-05-05 8:43 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-05-05 1:45 vCPU scalability for linux VMs Alec Istomin
2010-05-05 8:43 ` Avi Kivity [this message]
2010-05-05 16:56 ` Alec Istomin
[not found] ` <AANLkTinDKDV3vwLiZzmMC6C4cjOnXT1H-joJ4rcR3vgA@mail.gmail.com>
2010-05-05 17:27 ` Fwd: " Srivatsa Vaddagiri
2010-05-05 19:31 ` Alec Istomin
2010-05-06 5:53 ` Srivatsa Vaddagiri
2010-05-06 7:58 ` Alec Istomin
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