Gonçalo Borges ha scritto:
> Hi All...
Hi Goncalo,
>
> I'm implementing the HEP06 benchmark values in the information system,
> and I profit the opportunity for reviewing some of the information I'm
> publishing. For you reference, I'm looking to:
>
> https://twiki.cern.ch/twiki/pub/LCG/WLCGCommonComputingReadinessChallenges/WLCG_GlueSchemaUsage-1.8.pdf
>
>
> I have 113 hosts (2 quadcore cpus each) offering (113x8=) 904 cores.
> Here are my doubts:
>
> 1./ What's the correct value for GlueSubClusterPhysicalCPUs?
you should put the exact number of physical cpu, so 226 is the right number
>
> I have set it to 226 (113 x 2 quadcore cpus) but I'm wondering if it
> shouldn't be 113. I'm doubting because one of the following variables
> is SMPSize, defined as the number of cores per WN, which in my case is
> 8. Using those variables for some simple math operation like
> (GlueSubClusterPhysicalCPUs=226) x (SMPSize=8), you get a wrong value
> for the total number of logical CPUs (Cores).
>
> 2./ What's the correct value for GlueSubClusterLogicalCPUs?
>
> I've set it up to 904 (the total number of cores) but since we have
> sufficient memory per core, we allow some overbooking, and I wonder if
> I should publish the total number of slots (allowed jobs) instead...
if each of your WN has 8 core, 226*8=1808 is the right number; but, if
I've well understood your case, if on some WN the overbooking makes to
see to the O.S. more "computing units", you should take them into
account in the "LogicalCPU number"
>
> 3./ I've set up "GlueHostProcessorOtherDescription:
> Cores=8,Benchmark=54.90-HEP-SPEC06". I assume that the benchmark value
> should be published by server (and not by core), and that the number
> of cores is the total number of cores per server, and not per CPU as
> stated in the docs (which in my case would be 4 since each host has 2
> quadcore cpus). Is my assumption right?
actually you should publish "Cores=4,Benchmark=54.90-HEP-SPEC06",
because 4 is the number of cores per cpu on the typical WN
best regards,
Alessandro
>
> Thanks in Advance
> Cheers
> Goncalo
--
Dr. Alessandro Paolini
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