diff options
Diffstat (limited to 'drivers/net/ethernet/intel/i40evf/i40e_txrx.c')
| -rw-r--r-- | drivers/net/ethernet/intel/i40evf/i40e_txrx.c | 27 |
1 files changed, 21 insertions, 6 deletions
diff --git a/drivers/net/ethernet/intel/i40evf/i40e_txrx.c b/drivers/net/ethernet/intel/i40evf/i40e_txrx.c index 7d98042338e0..d76fe4a948df 100644 --- a/drivers/net/ethernet/intel/i40evf/i40e_txrx.c +++ b/drivers/net/ethernet/intel/i40evf/i40e_txrx.c @@ -331,6 +331,7 @@ static void i40evf_force_wb(struct i40e_vsi *vsi, struct i40e_q_vector *q_vector static bool i40e_set_new_dynamic_itr(struct i40e_ring_container *rc) { enum i40e_latency_range new_latency_range = rc->latency_range; + struct i40e_q_vector *qv = rc->ring->q_vector; u32 new_itr = rc->itr; int bytes_per_int; int usecs; @@ -339,9 +340,10 @@ static bool i40e_set_new_dynamic_itr(struct i40e_ring_container *rc) return false; /* simple throttlerate management - * 0-10MB/s lowest (100000 ints/s) + * 0-10MB/s lowest (50000 ints/s) * 10-20MB/s low (20000 ints/s) - * 20-1249MB/s bulk (8000 ints/s) + * 20-1249MB/s bulk (18000 ints/s) + * > 40000 Rx packets per second (8000 ints/s) * * The math works out because the divisor is in 10^(-6) which * turns the bytes/us input value into MB/s values, but @@ -362,24 +364,37 @@ static bool i40e_set_new_dynamic_itr(struct i40e_ring_container *rc) new_latency_range = I40E_LOWEST_LATENCY; break; case I40E_BULK_LATENCY: - if (bytes_per_int <= 20) - new_latency_range = I40E_LOW_LATENCY; - break; + case I40E_ULTRA_LATENCY: default: if (bytes_per_int <= 20) new_latency_range = I40E_LOW_LATENCY; break; } + + /* this is to adjust RX more aggressively when streaming small + * packets. The value of 40000 was picked as it is just beyond + * what the hardware can receive per second if in low latency + * mode. + */ +#define RX_ULTRA_PACKET_RATE 40000 + + if ((((rc->total_packets * 1000000) / usecs) > RX_ULTRA_PACKET_RATE) && + (&qv->rx == rc)) + new_latency_range = I40E_ULTRA_LATENCY; + rc->latency_range = new_latency_range; switch (new_latency_range) { case I40E_LOWEST_LATENCY: - new_itr = I40E_ITR_100K; + new_itr = I40E_ITR_50K; break; case I40E_LOW_LATENCY: new_itr = I40E_ITR_20K; break; case I40E_BULK_LATENCY: + new_itr = I40E_ITR_18K; + break; + case I40E_ULTRA_LATENCY: new_itr = I40E_ITR_8K; break; default: |