diff options
| 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_main.c | |
| 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_main.c')
| -rw-r--r-- | drivers/net/ethernet/intel/i40evf/i40evf_main.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/net/ethernet/intel/i40evf/i40evf_main.c b/drivers/net/ethernet/intel/i40evf/i40evf_main.c index ce997902f5a3..a44a42bb83c0 100644 --- a/drivers/net/ethernet/intel/i40evf/i40evf_main.c +++ b/drivers/net/ethernet/intel/i40evf/i40evf_main.c @@ -357,6 +357,7 @@ i40evf_map_vector_to_rxq(struct i40evf_adapter *adapter, int v_idx, int r_idx) q_vector->rx.ring = rx_ring; q_vector->rx.count++; q_vector->rx.latency_range = I40E_LOW_LATENCY; + q_vector->itr_countdown = ITR_COUNTDOWN_START; } /** @@ -377,6 +378,7 @@ i40evf_map_vector_to_txq(struct i40evf_adapter *adapter, int v_idx, int t_idx) q_vector->tx.ring = tx_ring; q_vector->tx.count++; q_vector->tx.latency_range = I40E_LOW_LATENCY; + q_vector->itr_countdown = ITR_COUNTDOWN_START; q_vector->num_ringpairs++; q_vector->ring_mask |= BIT(t_idx); } |