Hello,
Burke, S (Stephen) wrote:
> LHC Computer Grid - Rollout
>
>> [mailto:[log in to unmask]] On Behalf Of Tomas Kouba said:
>>
>>> Cores=2, Benchmark=9.905-HEP-SPEC06
>>>
>> Is the space after the comma mandatory? The lcg variables description
>> at
>> https://twiki.cern.ch/twiki/bin/view/LCG/Site-info_configurati
>> on_variables
>> differs from the document at
>> http://twiki.cern.ch/twiki/pub/LCG/WLCGCommonComputingReadines
>> sChallenges/WLCG_GlueSchemaUsage-1.8.pdf
>>
>
> Flavia's document (the second link) is the definitive source. In this
> case I would expect the space not to be significant but it's probably
> safer to include it since it's in the document - I cc'ed Flavia to see
> if she has any comment.
>
The space was "added" by some "Microsoft word" formatting feature (since
I used a different font to type this rule). It is definitely not
significant.
I checked the 2 documents with respect to the variable CE_OTHERDESCR and
I could not notice any difference in the description. The only
difference is in the sentence "Note that this variable is waiting for a
fix in lcg CE and cream CE configurations and it's not used right now in
the information system."
>> A similar question applies for Benchmark. The document uses
>> the term "CPU power",
>> so is the Benchmark meant for whole CPU or just per core?
>>
>
> The unit is per core - the documentation on the hepspec benchmark should
> explain that.
Also the document does explain it in several places. For instance,
please check note 1.1d on page 6:
Note 1.1d: The rule established by WLCG to publish the correct value for
BenchmarkSI00 is described in the following GOC wiki page (please check
in particular the example given):
http://goc.grid.sinica.edu.tw/gocwiki/CPU_Benchmarking_HowTo. Please,
note that in this wiki page one is instructed to find the power per job
slot (dividing the total score from the HEPIX procedure by the number of
job slots). The proposal we make is to find the power per core (dividing
the total score by the number of cores in the box). Another source of
information is the following WLCG document:
http://lcg.web.cern.ch/LCG/documents/Processor%20performance%20metrics_26may07.pdf.
Hope this helps.
Flavia
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