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| author | Jacob Keller <jacob.e.keller@intel.com> | 2015-10-16 10:57:07 -0700 |
|---|---|---|
| committer | Jeff Kirsher <jeffrey.t.kirsher@intel.com> | 2015-12-05 23:55:21 -0800 |
| commit | 242722dd3d0af32703d4ebb4af63c92a2c85b835 (patch) | |
| tree | 06f5ed4c9c00a650a7006cbf84d055a10e01182c /drivers/net/ethernet/intel/fm10k/fm10k.h | |
| parent | 584373f5b98aed81ff5a432d91b6e16d7554a5c9 (diff) | |
| download | lwn-242722dd3d0af32703d4ebb4af63c92a2c85b835.tar.gz lwn-242722dd3d0af32703d4ebb4af63c92a2c85b835.zip | |
fm10k: Update adaptive ITR algorithm
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>
Diffstat (limited to 'drivers/net/ethernet/intel/fm10k/fm10k.h')
| -rw-r--r-- | drivers/net/ethernet/intel/fm10k/fm10k.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/net/ethernet/intel/fm10k/fm10k.h b/drivers/net/ethernet/intel/fm10k/fm10k.h index cea0d94d8f5f..bb799b368996 100644 --- a/drivers/net/ethernet/intel/fm10k/fm10k.h +++ b/drivers/net/ethernet/intel/fm10k/fm10k.h @@ -164,6 +164,7 @@ struct fm10k_ring_container { unsigned int total_packets; /* total packets processed this int */ u16 work_limit; /* total work allowed per interrupt */ u16 itr; /* interrupt throttle rate value */ + u8 itr_scale; /* ITR adjustment scaler based on PCI speed */ u8 count; /* total number of rings in vector */ }; |