[gridengine users] About cpu time.

Reuti reuti at staff.uni-marburg.de
Thu May 7 06:14:27 UTC 2020


Hi,

It might be, that the application is ignoring the set OMP_NUM_THREADS (or assumes a max value if unset) and using all cores in a machine. How many  cores are installed?

-- Reuti


Am 07.05.2020 um 01:04 schrieb Jerome IBt:

> Dear all
> 
> I'm facing a strange problem with some parralel programs.
> Ive run a job ina queue with 24 hours limit time. The job
> 
> Qacct report this (4 cores):
> qname        all.q
> hostname     compute-0-3.local
> group        estudiante
> owner        xairarg
> project      NONE
> department   defaultdepartment
> jobname      RespBact
> jobnumber    1335842
> taskid       24
> account      sge
> priority     0
> qsub_time    Sat May  2 20:29:57 2020
> start_time   Sat May  2 22:19:00 2020
> end_time     Sun May  3 19:40:54 2020
> granted_pe   thread
> slots        4
> failed       0
> exit_status  0
> ru_wallclock 76914s
> ru_utime     1128016.632s
> ru_stime     2191.568s
> ru_maxrss    20.811MB
> ru_ixrss     0.000B
> ru_ismrss    0.000B
> ru_idrss     0.000B
> ru_isrss     0.000B
> ru_minflt    351497264
> ru_majflt    0
> ru_nswap     0
> ru_inblock   71047120
> ru_oublock   1087912
> ru_msgsnd    0
> ru_msgrcv    0
> ru_nsignals  0
> ru_nvcsw     43908490
> ru_nivcsw    80940156
> cpu          1130208.200s
> mem          13575.491TBs
> io           2.022GB
> iow          0.000s
> maxvmem      20.813GB
> arid         undefined
> ar_sub_time  undefined
> category     -pe thread 4
> 
> 
> Ths job was running 21h22 approximaly. The roblem is that qacct report a
> cpu time of  1130208 seconds, in place of 4*76914 = 307656 . That is, 3
> time more! As it was using 12 cores.
> 
> I remember someone speak about this problem in the list.
> 
> What's wrong with this accounting?
> 
> Regards.
> 
> 
> -- 
> -- Jérôme
> -Ah évidemment j'en suis pas encore aux toiles de maître, mais enfin
> c'est un début
> -Oh c'est un début qui promet. Mais tu vois si j'étais chez moi comme tu
> le disais si gentiment,bah j'mettrai ça ailleurs.
> -Qu'est-ce que je disais, y s'rait mieux près de la fenêtre. Tu le
> verrais où toi ?
> -À la cave.
> 	(Michel Audiard)
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