[mvapich-discuss] AlltoAll fails for messages beyond a certain size

[Kalyana Krishna]

Hello,

I am testing the performance of AlltoAll of various different
implementations on a 128-way SMP Linux on POWER system.

Using MVAPICH 1.2RC1, OSU alltoall benchmark and my own simple alltoall code
crash beyond a certain message size. The message size at which they crash
changes from run to run.

The message is as follows:

Crashed at ~18 KB
MPI_Collective_Test_mvapich: mpid_smpi.c:481: smpi_recv_get: Assertion
`recv_buf->busy == 1' failed.
MPI process terminated unexpectedly
Exit code -5 signaled from
Killing remote processes...DONE
Signal 15 received.


Crashed at size 16384
osu_alltoall: mpid_smpi.c:481: smpi_recv_get: Assertion `recv_buf->busy ==
1' failed.
MPI process terminated unexpectedly
Exit code -5 signaled from
Killing remote processes...DONE

MVAPICH was compiled with IBM XL compilers with default optimizations.

Regards,
Kalyan
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://mail.cse.ohio-state.edu/pipermail/mvapich-discuss/attachments/20100707/4effb089/attachment-0001.html