Hello! Can you please help me with problem? I'm working on custom myriexpress library and I'm using MX netmod in MPICH v.3.1.2. For testing purposes I built OSU Micro Benchmarks v3.8. To run it on 7 nodes I execute test osu_alltoall as follows:

MPICH_NEMESIS_NETMOD=mx mpiexec -f /tmp/m -n 7 /osu_alltoall

It passed successfully (I also tried it on 2, 3, 4, 5 and 6 nodes - everything is alright). But now I want to run it on 8 nodes:

MPICH_NEMESIS_NETMOD=mx mpiexec -f /tmp/m -n 8 /osu_alltoall [stdout] # OSU MPI All-to-All Personalized Exchange Latency Test v3.8 # Size Avg Latency(us) Assertion failed in file ../src/mpid/ch3/channels/nemesis/netmod/mx/mx_poll.c at line 784: n_iov > 0 Assertion failed in file ../src/mpid/ch3/channels/nemesis/netmod/mx/mx_poll.c at line 784: n_iov > 0 Assertion failed in file ../src/mpid/ch3/channels/nemesis/netmod/mx/mx_poll.c at line 784: n_iov > 0 Assertion failed in file ../src/mpid/ch3/channels/nemesis/netmod/mx/mx_poll.c at line 784: n_iov > 0 Assertion failed in file ../src/mpid/ch3/channels/nemesis/netmod/mx/mx_poll.c at line 784: n_iov > 0 Assertion failed in file ../src/mpid/ch3/channels/nemesis/netmod/mx/mx_poll.c at line 784: n_iov > 0 Assertion failed in file ../src/mpid/ch3/channels/nemesis/netmod/mx/mx_poll.c at line 784: n_iov > 0 Assertion failed in file ../src/mpid/ch3/channels/nemesis/netmod/mx/mx_poll.c at line 784: n_iov > 0 internal ABORT - process 4 internal ABORT - process 7 internal ABORT - process 2 internal ABORT - process 6 internal ABORT - process 3 internal ABORT - process 0 internal ABORT - process 5 internal ABORT - process 1 [/stdout]

So, what does these assertions mean? Is it something wrong with MX netmod? Or in myriexpress library? Or in test osu_alltoall itself? BTW, osu_alltoall on 8 nodes passed successfully for TCP netmod. _______________________________________________ discuss mailing list [email protected] To manage subscription options or unsubscribe: https://lists.mpich.org/mailman/listinfo/discuss