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perfermance problem about the ib_send_bw test #65

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shengyang-3390 opened this issue Oct 17, 2019 · 2 comments
Closed

perfermance problem about the ib_send_bw test #65

shengyang-3390 opened this issue Oct 17, 2019 · 2 comments

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@shengyang-3390
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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
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I don't notice such degradation on my setup. What about the other message sizes?

@HassanKhadour
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Closing the Issue, please reopen if repro

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