fm10k: Update adaptive ITR algorithm

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The existing adaptive ITR algorithm is overly restrictive. It throttles
incorrectly for various traffic rates, and does not produce good
performance. The algorithm now allows for more interrupts per second,
and does some calculation to help improve for smaller packet loads. In
addition, take into account the new itr_scale from the hardware which
indicates how much to scale due to PCIe link speed.

Reported-by: Matthew Vick <matthew.vick@intel.com>
Reported-by: Alex Duyck <alexander.duyck@gmail.com>
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Tested-by: Krishneil Singh <krishneil.k.singh@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

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This commit is contained in:

Jacob Keller 2015-10-16 10:57:07 -07:00 • committed by Jeff Kirsher

parent 584373f5b9

commit 242722dd3d

3 changed files with 45 additions and 14 deletions

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1

drivers/net/ethernet/intel/fm10k/fm10k.h

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52

drivers/net/ethernet/intel/fm10k/fm10k_main.c

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6

drivers/net/ethernet/intel/fm10k/fm10k_pci.c

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