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/i40e/i40e_main.c | |
| parent | i40e: Workaround fix for mss < 256 issue (diff) | |
| download | linux-dev-164c9f54631beca4d174f306acdcaec2bdeef52e.tar.xz linux-dev-164c9f54631beca4d174f306acdcaec2bdeef52e.zip | |
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/i40e/i40e_main.c')
| -rw-r--r-- | drivers/net/ethernet/intel/i40e/i40e_main.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c index 781a6f4880f2..0e6abc2ec16d 100644 --- a/drivers/net/ethernet/intel/i40e/i40e_main.c +++ b/drivers/net/ethernet/intel/i40e/i40e_main.c @@ -881,6 +881,7 @@ static void i40e_update_vsi_stats(struct i40e_vsi *vsi) u64 bytes, packets; unsigned int start; u64 tx_linearize; + u64 tx_force_wb; u64 rx_p, rx_b; u64 tx_p, tx_b; u16 q; @@ -899,7 +900,7 @@ static void i40e_update_vsi_stats(struct i40e_vsi *vsi) */ rx_b = rx_p = 0; tx_b = tx_p = 0; - tx_restart = tx_busy = tx_linearize = 0; + tx_restart = tx_busy = tx_linearize = tx_force_wb = 0; rx_page = 0; rx_buf = 0; rcu_read_lock(); @@ -917,6 +918,7 @@ static void i40e_update_vsi_stats(struct i40e_vsi *vsi) tx_restart += p->tx_stats.restart_queue; tx_busy += p->tx_stats.tx_busy; tx_linearize += p->tx_stats.tx_linearize; + tx_force_wb += p->tx_stats.tx_force_wb; /* Rx queue is part of the same block as Tx queue */ p = &p[1]; @@ -934,6 +936,7 @@ static void i40e_update_vsi_stats(struct i40e_vsi *vsi) vsi->tx_restart = tx_restart; vsi->tx_busy = tx_busy; vsi->tx_linearize = tx_linearize; + vsi->tx_force_wb = tx_force_wb; vsi->rx_page_failed = rx_page; vsi->rx_buf_failed = rx_buf; |