Profiling about rsmpi

[bsteinb]

That is an interesting question. I have not yet tried it myself. By default rsmpi is dynamically linked to the system MPI library, so I suspect that the usual mechanism of LD_PRELOADing a profiling library that intercepts the MPI performance tool interface would work.

Other forms of instrumentation that require certain compiler features or do source transformations are not likely to work.

As for what the actual results of the profiling would look like, I honestly could not say.

I will investigate further.

[bsteinb]

I just did some experiments and was able to successfully link mpiP into some of my examples. It seemed to pick up the MPI function calls performed by Rust code.

To build the examples with mpiP, I did

cargo rustc --verbose --example vector -- -L native=/directory/containing/libmpiP.so/ -l dylib=mpiP

I guess other profilers might achieve similar amounts of success. Does this answer your question?

[clamydo]

Yes, thank you. I've tried Callgrind and VampirTrace with dynamic instrumentation, which seems to work. It would be interesting, if tools would work, that do the instrumentation on a binary level.

I probably will investigate this further. For now, I'll close this issue.

[bsteinb]

Good to know, thanks for reporting this. I would be interested to hear about the results of your further investigations also.