[ovirt-users] CPU Threads Help!!!

Alexandr Krivulya shuriku at shurik.kiev.ua
Thu Aug 13 14:42:56 UTC 2015


13.08.2015 08:54, Roy Golan пишет:
> On 08/12/2015 01:55 PM, Artyom Lukianov wrote:
>> Can you please provide output of lscpu for your host please.
>> Thanks
>
>
>> ----- Original Message -----
>> From: "zhangjian2011" <zhangjian2011 at cn.fujitsu.com>
>> To: users at ovirt.org
>> Sent: Wednesday, August 12, 2015 1:06:11 PM
>> Subject: [ovirt-users] CPU Threads Help!!!
>>
>>
>>
>> Hi, Guys Recently I am investigating the Optimization Policy in
>> Cluster and try to use “ CPU Threads ”.
>>
>> As the manual of description:
>>
>> ========
>>
>> For example, a 24-core
>>
>> system with 2 threads per core (48
>>
>> threads total) can run virtual machines with
>>
>> up to 48 cores each
>>
>> ========
>>
>>
>>
>> My host CPU is
>>
>> i3-2120 CPU (2 cores 4 threads)
>>
>>
>>
>> So I think the expect result case is :
>>
>> 1. If the “ Count Threads As Cores ” disable , we can’t run virtual
>> vm with above 2 vCPU
>>
>> 2. If the “ Count Threads As Cores ” enable , we can’t run virtual vm
>> with above 4 vCPU
>>
>>
>>
>> Now the problem is about result case 1:
>>
>> 1. When I set “ Count Threads As Cores ” disable , I still can run
>> virtual vm with 4 vCPU
>>
>> Can anyone help me to explain it ???
>
> Like Artyom mentioned, it best to see your lscpu output but my guess
> is that the 4 threads is actually 2 per core.
>  And there are 2 core and 2 sockets. this means 4 cpus without hyper
> threading and 8 with.
>
> BTW the Host "General" subtab on the webadmin should output all this
> info as well. Check it out.

According to ARK Intel Core i3-2120 cannot be used in dual-socket
configurations.



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