tópico MPI stat na Intel® MPI Library

MPI stat

Biren_Doshi — Fri, 16 Mar 2018 05:01:23 GMT

I want to generate timing log on mpi functions. I am using "export I_MPI_STATS=20" to enable log. This is capturing timing info only on one node. How to get similar information from all nodes that are used in execution.

Thanks

Biren

When I use this feature, I

McCalpinJohn — Fri, 16 Mar 2018 18:09:47 GMT

When I use this feature, I get a single file (presumably created on the node running the master MPI task) with information for all MPI ranks in the job. You will need external information (such as hostfiles) to know which node each MPI rank actually ran on.

Hi John,

Biren_Doshi — Sun, 18 Mar 2018 12:57:06 GMT

Hi John,

It seems whenever stat is enabled, MPI_Finalize call is failing and because of that log info is not generated for all nodes. Any guess for why MPI_Finalize is failing only when stat is enabled?

Thanks

Biren

MPI is mostly a mystery to me

McCalpinJohn — Mon, 19 Mar 2018 16:13:42 GMT

MPI is mostly a mystery to me.... Maybe an Intel person can comment....

What sort of information are you getting in the stats.txt file? The output I see has one section per MPI rank, but each section includes information about the communication of that rank with all the other ranks, so I don't see how the output can even get started unless all the ranks have communicated their stats....