-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi,
Am 09.04.2017 um 16:35 schrieb r...@open-mpi.org: > There has been no change in the policy - however, if you are oversubscribed, > we did fix a bug to ensure that we don’t auto-bind in that situation > > Can you pass along your cmd line? So far as I can tell, it still seems to be > working. I'm not sure whether it was the case with 1.8, but according to the man page it binds now to sockets for number of processes > 2 . And this can lead the effect that one sometimes may notice a drop in performance when just this socket has other jobs running (by accident). So, this is solved - I wasn't aware of the binding by socket. But I can't see a binding by core for number of processes <= 2. Does it mean 2 per node or 2 overall for the `mpiexec`? - -- Reuti > >> On Apr 9, 2017, at 3:40 AM, Reuti <re...@staff.uni-marburg.de> wrote: >> >> Hi, >> >> While I noticed an automatic core binding in Open MPI 1.8 (which in a shared >> cluster may lead to oversubscribing of cores), I can't spot this any longer >> in the 2.x series. So the question arises: >> >> - Was this a general decision to no longer enable automatic core binding? >> >> First I thought it might be because of: >> >> - We define plm_rsh_agent=foo in $OMPI_ROOT/etc/openmpi-mca-params.conf >> - We compiled with --with-sge >> >> But also started on the command line by `ssh` to the nodes, there seems no >> automatic core binding to take place any longer. >> >> -- Reuti >> _______________________________________________ >> users mailing list >> users@lists.open-mpi.org >> https://rfd.newmexicoconsortium.org/mailman/listinfo/users > > _______________________________________________ > users mailing list > users@lists.open-mpi.org > https://rfd.newmexicoconsortium.org/mailman/listinfo/users > -----BEGIN PGP SIGNATURE----- Comment: GPGTools - https://gpgtools.org iEYEARECAAYFAljqnnYACgkQo/GbGkBRnRrwtACgpUAlpvQElzbjoVdvsQubZmTo Pj4An05kJd3pW0YWW4HXaf/7Zl7xTc+y =kzwG -----END PGP SIGNATURE----- _______________________________________________ users mailing list users@lists.open-mpi.org https://rfd.newmexicoconsortium.org/mailman/listinfo/users
