[openib-general] perftest on i386

[Bernhard Fischer]

Hi,

On i386 UP, i see odd results during runs. The machine is basically
idle.

The worst latency is always somewhere around exchange 12-80.
Is this expected and if not, does somebody have an idea what may cause
this?

Thank you,

$ ./rdma_lat -i 2 -U -s 1  tst09 -t 1 | egrep -v ", 3.(1|2|3)"
  local address:  LID 0x02, QPN 0x1a0406, PSN 0x5379e1 RKey 0x1040436
VAddr 0x00000008051001
  remote address: LID 0x01, QPN 0x1d0406, PSN 0xd7aed6, RKey 0x188043c
VAddr 0x00000008051001
#, usec
1, 12.8368
2, 4.94677
12, 7.0644
13, 87.8933
26, 64.8241
109, 7.10019
166, 5.88006
193, 3.47097
250, 11.6861
305, 11.9567
388, 6.57047
445, 5.39661
529, 6.8158
536, 3.46172
586, 5.7806
671, 4.3199
728, 5.78413
813, 4.36494
870, 38.4934
902, 3.40266
944, 6.93949
Size: 1, TX-depth: 1, Exchanges: 1000
Latency typical: 3.26619 usec
Latency best   : 3.17244 usec
Latency worst  : 87.8933 usec