Re: [Condor-users] Core detection - AMD 6180 SE

[Tim St Clair <tstclair@xxxxxxxxxx>]

You always have the option of setting NUM_CPUS=(x) on your exec nodes to override.

But this does appear to be an issue and I've opened a ticket: https://condor-wiki.cs.wisc.edu/index.cgi/tktview?tn=3180

Cheers,
Tim

----- Original Message -----
> From: "Brian Candler" <B.Candler@xxxxxxxxx>
> To: condor-users@xxxxxxxxxxx
> Sent: Tuesday, August 7, 2012 6:28:35 AM
> Subject: [Condor-users] Core detection - AMD 6180 SE
> 
> [Ubuntu 12.04, condor 7.8.1]
> 
> I am using some boxes with four AMD 6180 SE processors. Everything I
> can
> find on the web describes these as "12 core" processors, which
> suggests I
> have 48 real cores available.
> 
> I have configured condor with:
> 
> COUNT_HYPERTHREAD_CPUS = False
> SLOT_TYPE_1 = cpus=100%, ram=95%, swap=100%, disk=100%
> SLOT_TYPE_1_PARTITIONABLE = True
> NUM_SLOTS_TYPE_1 = 1
> 
> and it tells me that there are only 24 cores ("DetectedCPUs" is 48,
> but
> "TotalCPUs" is 24). That is, Condor says there is hyperthreading.
> 
> I think I'm not the first to come across this:
> https://www-auth.cs.wisc.edu/lists/condor-users/2011-August/msg00005.shtml
> 
> /proc/cpuinfo shows core id 0..5 and 0..5 for the 12 cores on one
> physical
> processor, and
> _CONDOR_ALL_DEBUG=D_ALL condor_config_val -debug NUM_CPUS
> shows these are considered by condor to be the same core.
> 
> If there hasn't been any progress on this, could it be added to
> "known bugs"
> at
> http://research.cs.wisc.edu/condor/manual/v7.8/9_3Stable_Release.html
> ?
> 
> Thanks,
> 
> Brian.
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