This web mail archive is frozen.
This page is part of a frozen web archive of this mailing list.
You can still navigate around this archive, but know that no new mails
have been added to it since July of 2016.
Click here to be taken to the new web archives of this list; it includes all the mails that are in this frozen archive plus all new mails that have been sent to the list since it was migrated to the new archives.
Dear open-mpi users,
I saw some posts ago almost the same question as I have, but it didn't
give me satisfactional answer.
I have setup like this:
GUI program on some machine (f.e. laptop)
Head listening on tcpip socket for commands from GUI.
Workers waiting for commands from Head / processing the data.
And now it's problematic. For passing the commands from Head I'm using:
do whatever head said (process small portion of the data, return
result to head, wait for another commands)
So in the idle time workers are stuck in MPI_Recv and have 100% CPU
usage, even if they are just waiting for the commands from Head.
Normally, I would not prefer to have this situation as I sometimes have
to share the cluster with others. I would prefer not to stop whole mpi
program, but just go into 'idle' mode, and thus make it run again soon.
Also I would like to have this aggresive MPI_Recv approach switched on
when I'm alone on the cluster. So is it possible somehow to switch this
mode on/off during runtime? Thank you in advance!