[ofa-general] Performance of MT25204 versus MT25208

[Bart Van Assche]

Hello,

Via ib_rdma_bw and ib_rdma_lat I obtained the following performance data:
* peak bandwith 674 MB/s / latency 3.07 microseconds between two
uniprocessor systems with MT25204 HCA's.
* peak bandwith 935 MB/s / latency 3.36 microseconds between two dual
processor systems with MT25208 HCA's.

I'm wondering now whether the performance differences are due to the
HCA's or due to the motherboard ?

Software: 2.6.22.9 Linux kernel (64-bit x86_64) + OFED 1.2.5.4
userspace components.

Bart.