From: Michael Tokarev <mjt@tls.msk.ru>
To: Todd And Margo Chester <toddandmargo@gmail.com>
Cc: kvm@vger.kernel.org
Subject: Re: What are the rules for hyperthreaded CPUs?
Date: Mon, 05 Dec 2011 11:42:01 +0400 [thread overview]
Message-ID: <4EDC75C9.9000500@msgid.tls.msk.ru> (raw)
In-Reply-To: <4EDC1DC7.7030605@gmail.com>
On 05.12.2011 05:26, Todd And Margo Chester wrote:
>> Hi All,
>>
>> My host has an i7-960 processor (4 cores, 8 hypterthreaded cores.)
>> /proc/cpuinfo on my host shows 8 processors.
>>
>> On my Fedora Core 16 guest, /proc/cpuinfo shows 4 processors.
>>
>> Question: what is the maximum number of processors I can assign to my
>> guest? 4 or 8? What are the rules for Hyperthreading?
>>
>> Many thanks,
>> -T
>
> Figured it out. The max cores is the number of hyperthreaded cores
> (eight in my case).
The maximum number of guest vCPUs is unlimited - you can assign, say,
100 cores - each vCPU core is just a thread on host, it does not
correspond to any physical characteristics of your host.
/mjt
next prev parent reply other threads:[~2011-12-05 7:42 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-12-05 1:26 What are the rules for hyperthreaded CPUs? Todd And Margo Chester
2011-12-05 7:42 ` Michael Tokarev [this message]
-- strict thread matches above, loose matches on Subject: below --
2011-12-05 0:41 Todd And Margo Chester
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