When run ib_write_bw with 2G msg, mlx5 reports 0x68, why?

Infrastructure & Networking Adapters and Cables InfiniBand/VPI Adapter Cards
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when run ib_write_bw with 2G msg, mlx5 reports 0x68, why??
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Hi @511252461 ,

How do you run the test? Do you use the “-s” flag?
Please share CLI and output.

Thanks,
Chen