[ewg] IB errors with openMPI

[Pradeep Satyanarayana]

We are trying run openMPI with OFED-1.5 on the 2.6.31-rt11-preempt-rt kernel and see the following errors:

[[45393,1],8][../../../../../ompi/mca/btl/openib/btl_openib_component.c:2951:handle_wc]
from elm3b107 to: elm3b17 error polling HP CQ with status WORK REQUEST FLUSHED
ERROR status number 5 for wr_id 1289846528 opcode -1782678528  vendor error 244
qp_idx 0

At this point I looked at the mlx4 diag counters and saw some non-zero values. Since we were attempting 
a series of runs, we don't know when the counters increased from 0. Do these counters have any correlation 
to the above MPI error?

[root at elm3b17 diag_counters]# pwd
/sys/class/infiniband/mlx4_0/diag_counters
[root at elm3b17 diag_counters]#

[root at elm3b17 diag_counters]# cat rq_num_rnr
19
[root at elm3b17 diag_counters]# cat rq_num_wrfe 
2009
[root at elm3b17 diag_counters]# cat sq_num_tree 
12
[root at elm3b17 diag_counters]# cat sq_num_wrfe
12
[root at elm3b17 diag_counters]#

Similarly on 3b107 let us look at the counters.

[root at elm3b107 diag_counters]# cat rq_num_wrfe
5156
[root at elm3b107 diag_counters]# cat sq_num_rnr
18
[root at elm3b107 diag_counters]# cat sq_num_tree
20
[root at elm3b107 diag_counters]# cat sq_num_wrfe
20
[root at elm3b107 diag_counters]#


We are using ConnectX dual port DDR HCAs (FW version 2.6). What does the vendor error 244 mean? Any suggestions to 
debug this further?

Thanks
Pradeep