[GE users] CPU time = Wallclock time?

reuti reuti at staff.uni-marburg.de
Fri Nov 7 11:59:31 GMT 2008


Am 06.11.2008 um 15:16 schrieb Wolfgang Friebel:

>> Am 05.11.2008 um 15:57 schrieb Wolfgang Friebel:
>
>>> If I want to do the cpu accounting properly, I have to sum up utime
>>> +stime.
>
> When I wrote that, I had looked to the accounting records of a  
> bunch of
> jobs only. My observations were obviously wrong, as I can see now  
> that the
> majority of jobs is reported properly.
>
> I was puzzled by accounting records such as (user, project and job  
> name
> modified):
>
> blade-long.q:hostxxx.yyy.de:project1:user1:xxxx.0.0.sge:350252:sge: 
> 0:12259745
> 88:1225974596:1225977250:0:0:2654:5:3:0.000000:0:0:0:0:47389:2:0:0.000 
> 000:0:0:0:
> 0:37771:3929:proj:defaultdepartment:NONE: 
> 1:0:2663.090000:250.730937:0.000000:-
> l
> arch=amd64,h_cpu=108000,h_stack=10M,h_vmem=2300M,os=sl5,tmp_free=1500M 
> :0.00000
> 0:NONE:362864640.000000
>
> where utime=5 + stime=3 and cpu=2663.09 while wallclock time=2654
>
> There is nothing special with that job, neither > 1 slot nor  
> exit_status
> or failed !=0

Despite the settings of slots, it could still use some threads.

-- Reuti


> Still my conclusion that you cannot rely on cpu seems to be valid (at
> least in 6.0u9)
>
> -- 
> Wolfgang Friebel                   Deutsches Elektronen-Synchrotron  
> DESY
> Phone/Fax:  +49 33762 77372/216    Platanenallee 6
> Mail: Wolfgang.Friebel AT desy.de  D-15738 Zeuthen  Germany
>
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