diff options
| author | Anjali Singhai Jain <anjali.singhai@intel.com> | 2015-10-21 19:47:08 -0400 |
|---|---|---|
| committer | Jeff Kirsher <jeffrey.t.kirsher@intel.com> | 2015-11-25 10:05:56 -0800 |
| commit | 164c9f54631beca4d174f306acdcaec2bdeef52e (patch) | |
| tree | 630dd432f6b8f8781fe25e2f0b5822e9bd2d124f /drivers/net/ethernet/intel/i40evf | |
| parent | 4f2f017c6101ab2ba202d6059c238c15577ad38b (diff) | |
i40e/i40evf: Add a stat to track how many times we have to do a force WB
When in NAPI with interrupts disabled, the HW needs to be forced to do a
write back on TX if the number of descriptors pending are less than a
cache line.
This stat helps keep track of how many times we get into this situation.
Change-ID: I76c1bcc7ebccd6bffcc5aa33bfe05f2fa1c9a984
Signed-off-by: Anjali Singhai Jain <anjali.singhai@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')
| -rw-r--r-- | drivers/net/ethernet/intel/i40evf/i40e_txrx.c | 4 | ||||
| -rw-r--r-- | drivers/net/ethernet/intel/i40evf/i40e_txrx.h | 1 |
2 files changed, 4 insertions, 1 deletions
diff --git a/drivers/net/ethernet/intel/i40evf/i40e_txrx.c b/drivers/net/ethernet/intel/i40evf/i40e_txrx.c index a4eea0898186..8629a9f77e42 100644 --- a/drivers/net/ethernet/intel/i40evf/i40e_txrx.c +++ b/drivers/net/ethernet/intel/i40evf/i40e_txrx.c @@ -1363,8 +1363,10 @@ int i40evf_napi_poll(struct napi_struct *napi, int budget) /* If work not completed, return budget and polling will return */ if (!clean_complete) { tx_only: - if (arm_wb) + if (arm_wb) { + q_vector->tx.ring[0].tx_stats.tx_force_wb++; i40evf_force_wb(vsi, q_vector); + } return budget; } diff --git a/drivers/net/ethernet/intel/i40evf/i40e_txrx.h b/drivers/net/ethernet/intel/i40evf/i40e_txrx.h index ebc1bf77f036..997b374e86af 100644 --- a/drivers/net/ethernet/intel/i40evf/i40e_txrx.h +++ b/drivers/net/ethernet/intel/i40evf/i40e_txrx.h @@ -201,6 +201,7 @@ struct i40e_tx_queue_stats { u64 tx_busy; u64 tx_done_old; u64 tx_linearize; + u64 tx_force_wb; }; struct i40e_rx_queue_stats { |