staging/rdma/hfi1: Allow tuning of SDMA interrupt rate

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The SDMA engines were configured to generate progress interrupts every time they
processed N/2 descriptors (where N is the size of the descriptor queue). This
interval was too infrequent, leading to degraded performance.

This commit adds a module parameter, as well as a recommended default, which
allows for the tuning of the interrupt frequency.

Reviewed-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Mitko Haralanov <mitko.haralanov@intel.com>
Signed-off-by: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Mitko Haralanov 2015-10-26 10:28:41 -04:00 • committed by Greg Kroah-Hartman

parent 3c6c065a51

commit ee947859bf

1 changed files with 9 additions and 1 deletions

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drivers/staging/rdma/hfi1/sdma.c

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