From: Alec Istomin <alec@openvz.org>
To: Srivatsa Vaddagiri <vatsa@in.ibm.com>
Cc: "kvm@vger.kernel.org" <kvm@vger.kernel.org>
Subject: Re: vCPU scalability for linux VMs
Date: Thu, 6 May 2010 00:58:13 -0700 [thread overview]
Message-ID: <6210495633.20100506005813@istomin.de> (raw)
In-Reply-To: <20100506055355.GB6251@linux.vnet.ibm.com>
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On Wednesday, May 5, 2010 at 01:53:55 -0400, Srivatsa Vaddagiri wrote:
> On Wed, May 05, 2010 at 12:31:11PM -0700, Alec Istomin wrote:
>>
>> On Wednesday, May 5, 2010 at 13:27:39 -0400, Srivatsa Vaddagiri wrote:
>> >> 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.
>>
>> > Could you provide more details of what workload was used to compare this
>> > performance?
>>
>> It's Dell's DVD-Store LAMP stack test suite with Medium database (about
>> 1 GB MySQL data) . 8x 2Gb VMs (on 16GB RAM host) with different vCPU
>> configuration simultaneously loaded by external web clients.
> Ok ..Do you have any more data on how the vCPU scalability looks like (how
> the throughput scales with increasing vCPUs)?
See attached for 1 vs 2 vs 4 vCPUs consolidated throughput from multiple
VMs with the same client payload. Selected DVD-Store (LAMP) scalability
is mixed into here too and I wonder what type of test would you
recommend to receive cleaner results?
Regards,
Alec
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prev parent reply other threads:[~2010-05-06 7:58 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
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 [this message]
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