[mpich-discuss] MPI_Comm_accept() pins cpu core 100%

[Dmitriy Lyubimov]

Hi,

I have a situation when a process my start up and execute
MPI_Comm_accept(), while waiting for others to join, which may take some
time.

I have observed that all processes that wait in MPI_Comm_accept(), pin 1
cpu core exactly 100%.

Which is unfortunate in my situation since if i launch enough processes, i
pin the entire machine node very quickly -- and it does do other things
that run into a crawl.

Is this a known problem? is there a workaround for this?

I tried on ubuntu 14-04 LTS which installs mpich 3.0.4 by default but i
also tested 3.2 Nov/2015 and they both exhibit this very behavior.

Thank you very much in advance.
-Dmitriy
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.mpich.org/pipermail/discuss/attachments/20160506/e64d77ae/attachment.html>
-------------- next part --------------
_______________________________________________
discuss mailing list     discuss at mpich.org
To manage subscription options or unsubscribe:
https://lists.mpich.org/mailman/listinfo/discuss