xprtrdma: More Send completion batching

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Instead of using a fixed number, allow the amount of Send completion
batching to vary based on the client's maximum credit limit.

- A larger default gives a small boost to IOPS throughput

- Reducing it based on max_requests gives a safe result when the
  max credit limit is cranked down (eg. when the device has a small
  max_qp_wr).

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>

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Chuck Lever 2019-04-24 09:39:59 -04:00 • committed by Anna Schumaker

parent dbcc53a52d

commit c209e49cea

2 changed files with 1 additions and 13 deletions

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4

net/sunrpc/xprtrdma/verbs.c

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10

net/sunrpc/xprtrdma/xprt_rdma.h

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