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| author | Jesse Brandeburg <jesse.brandeburg@intel.com> | 2015-09-28 14:16:54 -0400 |
|---|---|---|
| committer | Jeff Kirsher <jeffrey.t.kirsher@intel.com> | 2015-10-19 15:35:12 -0700 |
| commit | ee2319cf17ee64bbd0096f2f8f3f8390c93b1e39 (patch) | |
| tree | d8fb0d00f1226eb764ca532f0fbbb4a2f5835520 /drivers/net/ethernet/intel/i40e/i40e_txrx.h | |
| parent | c56625d59726ee2dc4dfd91c8b6c22098abe1ac4 (diff) | |
| download | linux-ee2319cf17ee64bbd0096f2f8f3f8390c93b1e39.tar.gz linux-ee2319cf17ee64bbd0096f2f8f3f8390c93b1e39.tar.bz2 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/i40e/i40e_txrx.h')
| -rw-r--r-- | drivers/net/ethernet/intel/i40e/i40e_txrx.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/net/ethernet/intel/i40e/i40e_txrx.h b/drivers/net/ethernet/intel/i40e/i40e_txrx.h index 0fe7eb77cae5..6779fb771d6a 100644 --- a/drivers/net/ethernet/intel/i40e/i40e_txrx.h +++ b/drivers/net/ethernet/intel/i40e/i40e_txrx.h @@ -38,8 +38,8 @@ #define I40E_ITR_8K 0x003E #define I40E_ITR_4K 0x007A #define I40E_MAX_INTRL 0x3B /* reg uses 4 usec resolution */ -#define I40E_ITR_RX_DEF I40E_ITR_8K -#define I40E_ITR_TX_DEF I40E_ITR_4K +#define I40E_ITR_RX_DEF I40E_ITR_20K +#define I40E_ITR_TX_DEF I40E_ITR_20K #define I40E_ITR_DYNAMIC 0x8000 /* use top bit as a flag */ #define I40E_MIN_INT_RATE 250 /* ~= 1000000 / (I40E_MAX_ITR * 2) */ #define I40E_MAX_INT_RATE 500000 /* == 1000000 / (I40E_MIN_ITR * 2) */ |