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| author | Jesse Brandeburg <jesse.brandeburg@intel.com> | 2015-09-28 20:16:54 +0200 |
|---|---|---|
| committer | Jeff Kirsher <jeffrey.t.kirsher@intel.com> | 2015-10-20 00:35:12 +0200 |
| commit | ee2319cf17ee64bbd0096f2f8f3f8390c93b1e39 (patch) | |
| tree | d8fb0d00f1226eb764ca532f0fbbb4a2f5835520 /drivers/net/ethernet/intel/i40evf/i40evf.h | |
| parent | i40e/i40evf: change dynamic interrupt thresholds (diff) | |
| download | linux-ee2319cf17ee64bbd0096f2f8f3f8390c93b1e39.tar.xz linux-ee2319cf17ee64bbd0096f2f8f3f8390c93b1e39.zip | |
i40e/i40evf: adjust interrupt throttle less frequently
The adaptive ITR (interrupt throttle rate) algorithm was adjusting
the hardware's interrupt rate too frequently. This caused a lot
of variation in the interrupt rate for fairly constant workloads.
Change the code to have a counter and adjust only once every N
number of interrupts.
Change-ID: I0460f1f86571037484eca5aca36ac4d889cb8389
Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Diffstat (limited to 'drivers/net/ethernet/intel/i40evf/i40evf.h')
| -rw-r--r-- | drivers/net/ethernet/intel/i40evf/i40evf.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/net/ethernet/intel/i40evf/i40evf.h b/drivers/net/ethernet/intel/i40evf/i40evf.h index 22841c619f37..22fc3d49c4b9 100644 --- a/drivers/net/ethernet/intel/i40evf/i40evf.h +++ b/drivers/net/ethernet/intel/i40evf/i40evf.h @@ -112,6 +112,8 @@ struct i40e_q_vector { struct i40e_ring_container tx; u32 ring_mask; u8 num_ringpairs; /* total number of ring pairs in vector */ +#define ITR_COUNTDOWN_START 100 + u8 itr_countdown; /* when 0 or 1 update ITR */ int v_idx; /* vector index in list */ char name[IFNAMSIZ + 9]; bool arm_wb_state; |