Soft-RoCE performance

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Hello!

I am seeing that Soft-RoCE has much lower throughput than TCP. Is that
expected? If not, are there typical config parameters I can fiddle
with?

When running iperf I am getting around 300MB/s whereas it's only
around 100MB/s using ib_write_bw from perftests.

This is between two machines running Ubuntu20.04 with the 5.11 kernel.

Cheers,
Christian



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