staging/rdma/hfi1: add ACK coalescing logic

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Implement ACK coalesing logic using a 8 bit counter.

The algorithm is send pio ack when:
- fecn present
- this is the first packet in an interrupt session
- counter is >= HFI1_PSN_CREDIT

Otherwise the ack is defered.

Reviewed-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Mike Marciniszyn 2015-11-10 09:14:01 -05:00 • committed by Greg Kroah-Hartman

parent 2fd36865b5

commit 7c091e5c06

3 changed files with 32 additions and 5 deletions

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1

drivers/staging/rdma/hfi1/qp.c

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29

drivers/staging/rdma/hfi1/rc.c

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7

drivers/staging/rdma/hfi1/verbs.h

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