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