[openib-general] IBV_WC_LOC_LEN_ERR in ibv_pingpong for message < 4KB

[Sayantan Sur]

Hi,

If I run `ibv_pingpong' with msg size argument < 4096, I am encountering
a IBV_WC_LOC_LEN_ERR. I have pasted the output from my run. Is this
usage correct? Is anybody else getting the same error too?

If I may ask, what do the messages like:

  [ 0] 00860404

mean? They are not coming from `ibv_pingpong' but from somewhere else.
Are they supposed to be debug messages? If yes, how can I interpret
them?

Thanks,
Sayantan.

==============
[surs at x5:latency] ibv_pingpong --size=4095
  local address:  LID 0x0001, QPN 0x860404, PSN 0x51bebd
  remote address: LID 0x0002, QPN 0x860404, PSN 0x4be4ee
  [ 0] 00860404
  [ 4] 00000000
  [ 8] 0020669c
  [ c] 00000000
  [10] 01d70000
  [14] 00207388
  [18] 00000004
  [1c] fe100000
  [ 0] 00860404
  [ 4] 0001000a
  [ 8] 1f20669c
  [ c] 00000300
  [10] 05f90000
  [14] 000001f3
  [18] 00000044
  [1c] fe100000
Failed status 1 for wr_id 1
==============
[surs at x5:latency] ibv_pingpong --size=4096
  local address:  LID 0x0001, QPN 0x850404, PSN 0x79dca6
  remote address: LID 0x0002, QPN 0x850404, PSN 0xff01c2
8192000 bytes in 0.02 seconds = 3411.38 Mbit/sec
1000 iters in 0.02 seconds = 19.21 usec/iter
==============

Platform description -

Hardware:
---------

Two Dual Intel Xeon EM64T 3.4 GHz nodes
PCI-Express I/O bus
MT25208 Mellanox HCAs (rev a0)

Software:
---------
RedHat AS 4
2.6.11.6/2.6.11.7 kernel with Gen2 InfiniBand drivers
Firmware version 5.0.1
OpenIB Gen2 drivers (user verbs from main branch)
OpenSM (OpenIB version/IBGD 1.7.0 both of them result in the same)


-- 
---------------------------------------------------------
Sayantan Sur            Graduate Research Assistant

395 Dreese Labs,        Computer Science and Engineering
Ohio State University,  Office : 774, Dreese Labs
Columbus,               email  : surs at cse.ohio-state.edu
Ohio - 43210.           phone(res) : 614.688.9792
USA.                    phone(off) : 614.292.8501
---------------------------------------------------------