[GE users] wildly innacurate cpu usage, SGE 6.0u4

Reuti reuti at staff.uni-marburg.de
Thu Jan 24 13:29:03 GMT 2008


Hi,

Am 24.01.2008 um 13:07 schrieb aaron at cs.york.ac.uk:

> I was doing some detailed analysis of the job mix on our system  
> from the
> past year to find out if the resources offered match those we  
> provide so
> as to
> inform future purchasing decisions. At first it looked that our  
> resources did
> not match from analyses run on the accounting file.
>
> On closer analysis, however, it seems that in a very few instances  
> the cpu
> time used exceeded by order(s) of magnitude the ru_wallclock*slots  
> time. Has
> anyone else seen this, and in what circumstances? The jobs affected  
> seem
> to have failed.

are these jobs forking any other process or thread - i.e. they are  
running in some way parallel on one and the same node?

If so, you could observe a load greater than the number of cores  
inside these systems.

-- Reuti

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