topic Re: profiling with time limit in Intel® MPI Library

profiling with time limit

psing51 — Thu, 03 Mar 2022 10:01:31 GMT

Hi,
I have a simulation setup which has been compiled with intel 2020u4.

problem statement -
The setup has 2 parts - input read, output writing.
scenario a) When i run a single copy of my setup, everything works fine, i.e. input read completes in ~20 minutes and output writing phase in ~60 minutes (overall ~80 minutes)

scenario b) But when i run multiple copies of the same run, then the input phase takes ~50 minutes followed by ~60 minutes of output .

I plan to use intel profiler to find the "slowest part" with the runs. I plan to run the profiler in scenario a) but i plan to profile only initial 50 minutes of simulation, and i dont care about the "output phase" profiling data.
How can i achieve this using aps?

i understand that the mpirun command will be -
mpirun -np X -ppn Y aps --collection-mode=mpi ./application.exe

But are there any additional options to make profiler stop gathering data?
or if i kill the application.exe after 50 minutes, the profiler will be able to show correct data?

Re: profiling with time limit

SantoshY_Intel — Fri, 04 Mar 2022 09:48:34 GMT

Hi,

Thanks for reaching out to us.

>>"How can i achieve this using aps? are there any additional options to make profiler stop gathering data?"

Application Performance Snapshot supports the region control with the MPI_Pcontrol() operation.
This allows you to enable and disable statistics collection for specific application regions in the source code. Region control only affects MPI and OpenMP* metrics, while the other ones will still be collected for the entire application.

For more information refer to the below link:

https://www.intel.com/content/www/us/en/develop/documentation/application-snapshot-user-guide/top/detailed-analyses/mpi-analyses/region-control-with-mpi-pcontrol.html

>>" if i kill the application.exe after 50 minutes, the profiler will be able to show correct data?"

No, It is not recommended to kill an application as it may result in either incorrect data or no data.

Thanks & Regards,

Santosh

Re:profiling with time limit

SantoshY_Intel — Fri, 11 Mar 2022 05:48:15 GMT

Hi,

We haven't heard back from you. Could you please provide an update on your issue?

Thanks & Regards,

Santosh

Re:profiling with time limit

SantoshY_Intel — Fri, 18 Mar 2022 05:20:53 GMT

Hi,

I assume that your issue is resolved. If you need any additional information, please post a new question as this thread will no longer be monitored by Intel.

Thanks & Regards,

Santosh