Second Run of a job finishing Quickly Than expected!

puneet336 · Post by **puneet336** » Tue Apr 28, 2015 8:13 am

I am trying to benchmark abinit on my machine, Now when i ran abinit first time with command:

nohup time mpirun -np 4 ./abinit <tmbt_1.files

the job took approx 15 hours to complete:

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--- !FinalSummary
start_date: Mon Apr 27 10:59:21 2015
end_date: Tue Apr 28  0:45:43 2015
overall_cpu_time:      989725.6
overall_wall_time:      198327.1
...

tmbt_1.files content is:

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tmbt_1.in
tmbt_1.out
tmbt_1i
tmbt_1o
tmbt_1t
14si.pspnc
8o.pspnc

attached:

After clearing out log files ,

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 rm -rvf *_DS1_* *_DS2_* *_LOG_* *.outA nohup.out

now again i ran the same job with same input files second time with 8 process , the job finished within 2 minutes,
so i reran the job with 4 processes , and again , my job finishes within 2 minutes (attached: nohup_2ndrun.out.log)!!

I am absolutely clueless now !What causes the job to finish within 2 minutes ? do i need to remove some more files ?

The job runs for a hefty 15 hours,
So, if anyone can give me input file(s) (i.e. in,psp) with which the job runs for approx 1 hour serially(with 1 process) then it will be very helpful to me.

Eagerly Awaiting your replies

Regards
Puneet