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linux-rdma / perftest

Infiniband Verbs Performance Tests
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perfermance problem about the ib_send_bw test #65

Closed shengyang-3390 closed 2 years ago

shengyang-3390 commented 5 years ago

I test ib_send_bw for two case on ARM services and IB card. Case1:numactl -C 64 ib_send_bw -d mlx5_0 -a --iters=1000 Case2:numactl -C 64 ib_send_bw -d mlx5_0 --size=1024 --iters=1000

Case1 perfermance data:

bytes #iterations BW peak[MB/sec] BW average[MB/sec] MsgRate[Mpps]

1024 1000 0.00 5544.28 5.677340

Case2 perfermance data:

bytes #iterations BW peak[MB/sec] BW average[MB/sec] MsgRate[Mpps]

1024 1000 0.00 920.13 0.942218

The performance of the case1 is 6 times of case2 performance. What may cause the performance gap?

dimasique1 commented 4 years ago

I don't notice such degradation on my setup. What about the other message sizes?

HassanKhadour commented 2 years ago

Closing the Issue, please reopen if repro