On Thu, Apr 22, 2021 at 1:45 PM Barry Smith <[email protected]> wrote:

It would be straightforward to add an option to -info to output only from a particular MPI_COMM_WORLD global rank.

Maybe an extra :rank at the end of the info options?

Open 128k files is nuts.

Yep, and Fugaku can't deal with 128K MPI ranks then it should love 128K files

Barry

On Apr 22, 2021, at 11:14 AM, Mark Adams <[email protected]> wrote:

OK, so -info out.%p would do what I asked. Alas, what I really need it to reduce the output with 128K processes. Thanks,

On Thu, Apr 22, 2021 at 11:54 AM Pierre Jolivet <[email protected]> wrote:

...

On 22 Apr 2021, at 5:33 PM, Jacob Faibussowitsch <[email protected]> wrote:

Not out of the box no. There is -info ::self which makes info only print from calls made on PETSC_COMM_SELF, but I don’t think that’s what you want. Best advice would be to print to a file and grep the file for any lines starting with the rank number you want.

There is no need for grep, IMHO, just do -info file and then open file.%p

Thanks, Pierre

Best regards,

Jacob Faibussowitsch (Jacob Fai - booss - oh - vitch)

On Apr 22, 2021, at 10:16, Mark Adams <[email protected]> wrote:

Can I make -info only print from one process? Mark