On Mar 20, 2009, at 11:33 AM, Ricardo Fernández-Perea wrote:
This are the results initially
Running 1000 iterations.
Length Latency(us) Bandwidth(MB/s)
0 2.738 0.000
1 2.718 0.368
2 2.707 0.739
<snip>
1048576 4392.217 238.735
2097152 8705.028 240.913
4194304 17359.166 241.619
with export MX_RCACHE=1
Running 1000 iterations.
Length Latency(us) Bandwidth(MB/s)
0 2.731 0.000
1 2.705 0.370
2 2.719 0.736
<snip>
1048576 4265.846 245.807
2097152 8491.122 246.982
4194304 16953.997 247.393
Ricardo,
I am assuming that these are PCI-X NICs. Given the latency and
bandwidth, are these "D" model NICs (see the top of the mx_info
output)? If so, that looks about as good as you can expect.
Have you run Intel MPI Benchmark (IMB) or another MPI pingpong type
benchmark?
Scott
