2013/9/3 Hal Rosenstock <[email protected]>:
> With mthca, due to quirk, optimal performance is achieved at 1K MTU.
> OpenSM can reduce the MTU in returned PathRecords to 1K when one end of
> the path is mthca and actual path MTU is > 1K. This is controlled by
> enable_quirks config parameter which defaults to FALSE (don't do this).
I'll try.
Actually these are my results, from node1 to node2
$ sudo qperf -ub 172.17.0.2 rc_bi_bw rc_lat rc_bw rc_rdma_read_lat
rc_rdma_read_bw rc_rdma_write_lat rc_rdma_write_bw tcp_lat tcp_bw
rc_bi_bw:
bw = 20.5 Gb/sec
rc_lat:
latency = 15.4 us
rc_bw:
bw = 13.7 Gb/sec
rc_rdma_read_lat:
latency = 12.9 us
rc_rdma_read_bw:
bw = 11.5 Gb/sec
rc_rdma_write_lat:
latency = 15.2 us
rc_rdma_write_bw:
bw = 13.7 Gb/sec
tcp_lat:
latency = 48.8 us
tcp_bw:
bw = 12.5 Gb/sec
I don't know if they are good for a DDR fabric.
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