Re: [Condor-users] hyper-threading on Win compute nodes

[Ziliang Guo <ziliang@xxxxxxxxxxx>]

With the caveat that I need to see whether this is also reporting
logical processors instead of physical.

On Thu, Apr 12, 2012 at 12:06 PM, Ziliang Guo <ziliang@xxxxxxxxxxx> wrote:
> WMI is not an option due to the extra dependencies calling it through
> C++ drags in.  The registry on the other hand is proving more
> promising.  I think I've found the place where # of CPU cores is
> stored, just need to doublecheck.
>
> On Wed, Apr 11, 2012 at 6:42 PM, Guy K. Kloss <guy.kloss@xxxxxxxxx> wrote:
>> Hi Ziliang,
>>
>> On 12/04/12 10:52, Ziliang Guo wrote:
>>> I'm the guy that's been assigned the ticket today (imagine my
>>> surprise when I checked my email).
>>
>> Well, that sounds awesome. Looking forward to that.
>>
>>> We have a plan for detecting
>>> hyperthreaded cores, but the bad news is Microsoft only added support
>>> for this in Vista and higher, so if you are on an XP machine, I'm
>>> afraid the problem will remain.
>>
>> As I've hinted, I'm currently going to solve the problem by creating a
>> (Python) script to generate a line with the NUM_CPUS directive in the
>> configuration for our deployment.
>>
>> Researching that, I've stumbled upon something that *might* be helpful,
>> but I don't know whether it's possible to run this on Win XP boxes, too.
>> After lots of prodding, Google has revealed a page that suggests to use
>> WMI to extract a property "NumberOfCores" from the CPU. Gladly, there's
>> a command line client available for using WMI. So the following resulted
>> in something that worked for me in detecting the number of physical
>> cores on a box:
>>
>> H:\> wmic cpu get NumberOfCores
>> NumberOfCores
>> 4
>>
>> If this is also a possibility on Win XP, I'm glad to have told you. If
>> not ... well ... still thought it might be worth sending this one on.
>>
>> There might be other ways by digging through the registry, but regedit
>> is blocked here by our admins, and I'm more of a Linux than Windows guy
>> to know these things for sure.
>>
>> Guy
>>
>> --
>> Guy K. Kloss
>> School of Computing + Mathematical Sciences
>> Auckland University of Technology
>> Private Bag 92006, Auckland 1142
>> phone: +64 9 921 9999 ext. 5032
>> eMail: Guy.Kloss@xxxxxxxxx
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>
>
>
> --
> Condor Project Windows Developer



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Condor Project Windows Developer