[OMPI devel] *neighbor_alltoall* are broken

[Gilles Gouaillardet]

Folks,

i noticed that *neighbor_alltoall* are now broken.

the bug is in the way parameters are checked (i revamped this and did the
wrong thing for neighbor communications :-()

this bug is only visible when the number of tasks become large
(this can explain why i did not detect this on my VM ...)

i am sorry for the mess and now working on a fix

Gilles

[OMPI devel] Still problems with del_procs in trunkj

[Rolf vandeVaart]

I am still seeing problems with del_procs with openib.  Do we believe 
everything should be working?  This is with the latest trunk (updated 1 hour 
ago).

[rvandevaart@drossetti-ivy0 examples]$ mpirun --mca btl_openib_if_include 
mlx5_0:1 -np 2 -host drossetti-ivy0,drossetti-ivy1 connectivity_cConnectivity 
test on 2 processes PASSED.
connectivity_c: ../../../../../ompi/mca/btl/openib/btl_openib.c:1151: 
mca_btl_openib_del_procs: Assertion 
`((opal_object_t*)endpoint)->obj_reference_count == 1' failed.
connectivity_c: ../../../../../ompi/mca/btl/openib/btl_openib.c:1151: 
mca_btl_openib_del_procs: Assertion 
`((opal_object_t*)endpoint)->obj_reference_count == 1' failed.
--
mpirun noticed that process rank 1 with PID 28443 on node drossetti-ivy1 exited 
on signal 11 (Segmentation fault).
--
[rvandevaart@drossetti-ivy0 examples]$ 
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[OMPI devel] Threshold for pinning down user-buffers

[Siddhartha Jana]

Hi,
Is my understanding correct?
While servicing MPI_Send  using eager protocol over openib, there is a
data-size threshold below which it is preferred to copy the contents of the
user-buffer to a pre-pinned buffer instead of directly pinning down the
user-buffer. If this is correct, how does one determine this threshold?

As always, thanks for the help
Sid