[slurm-users] Job runtime

Mahmood Naderan mahmood.nt at gmail.com
Sat Mar 17 23:30:34 MDT 2018

Thanks for the exaplnation Chris. I will read cgroup.


On Sun, Mar 18, 2018 at 7:43 AM, Chris Samuel <chris at csamuel.org> wrote:
> On Sunday, 18 March 2018 5:46:50 AM AEDT Mahmood Naderan wrote:
>> Excuse me but I think that is wrong.
> I think we're talking at cross-purposes, I thought you were puzzled about why
> CPU time was less than the total time in a general context (not purely within
> Slurm).
>> "Elapsed" is the wall clock time.
> Correct.
>> "UserCPU" should be "NCPUS*Elapsed".
> No, that's CPUTime (as mentioned in the sacct manual page).
> UserCPU is a measure of the time that the CPU spent running the program in
> user space as reported by the kernel.  Note the caveat about it on the sacct
> manual page:
> https://slurm.schedmd.com/sacct.html
> Also note that how you tell Slurm to gather statistics affects its accuracy.
> I've pretty much always used the cgroup method as that seems to give better
> accuracy to me (especially for memory usage).
> All the best,
> Chris
> --
>  Chris Samuel  :  http://www.csamuel.org/  :  Melbourne, VIC

More information about the slurm-users mailing list