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IB delay is unstable #172

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w7658610 opened this issue Oct 26, 2022 · 1 comment
Open

IB delay is unstable #172

w7658610 opened this issue Oct 26, 2022 · 1 comment

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@w7658610
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Hi，
We recently found that there was delay jitter in the IB underlying drivers while testing latency.
And the maximum delay is many times the average delay
Whether it's read_lat, write_lat, or others.

01:00.0 Infiniband controller: Mellanox Technologies MT28908 Family [ConnectX-6]
Subsystem: Mellanox Technologies Device 010e
21:00.0 Infiniband controller: Mellanox Technologies MT28908 Family [ConnectX-6]
Subsystem: Mellanox Technologies Device 010e
44:00.0 Infiniband controller: Mellanox Technologies MT28908 Family [ConnectX-6]
Subsystem: Mellanox Technologies Device 010e
64:00.0 Infiniband controller: Mellanox Technologies MT28908 Family [ConnectX-6]
Subsystem: Mellanox Technologies Device 010e

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@HassanKhadour
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Hi,
thanks for your contribution, can you please assist on how to repro it ?

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@w7658610 @HassanKhadour