diff options
| author |   Jacob Keller <jacob.e.keller@intel.com> | 2017-05-03 10:29:00 -0700 |
|---|---|---|
| committer |   Jeff Kirsher <jeffrey.t.kirsher@intel.com> | 2017-06-13 16:11:48 -0700 |
| commit | 4cc74c01ef8bb59fae98aeda359e8bcf6148943a (patch) | |
| tree | 325707ae6cb6411b472e7323c26b72c7e3c87997 /drivers/net/ethernet/intel/ixgbe/ixgbe_main.c | |
| parent | ixgbe: avoid permanent lock of *_PTP_TX_IN_PROGRESS (diff) | |
| download | linux-dev-4cc74c01ef8bb59fae98aeda359e8bcf6148943a.tar.xz linux-dev-4cc74c01ef8bb59fae98aeda359e8bcf6148943a.zip | |
ixgbe: add statistic indicating number of skipped Tx timestamps
The ixgbe driver can only handle one Tx timestamp request at a time.
This means it is possible for an application timestamp request to be
ignored.
There is no easy way for an administrator to determine if this occurred.
Add a new statistic which tracks this, tx_hwtstamp_skipped.
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Diffstat (limited to '')
| -rw-r--r-- | drivers/net/ethernet/intel/ixgbe/ixgbe_main.c | 23 |
1 files changed, 13 insertions, 10 deletions
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c index 5773df248360..4ea1137ea23f 100644 --- a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c +++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c @@ -8337,16 +8337,19 @@ netdev_tx_t ixgbe_xmit_frame_ring(struct sk_buff *skb, protocol = vlan_get_protocol(skb); if (unlikely(skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) && - adapter->ptp_clock && - !test_and_set_bit_lock(__IXGBE_PTP_TX_IN_PROGRESS, - &adapter->state)) { - skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS; - tx_flags |= IXGBE_TX_FLAGS_TSTAMP; - - /* schedule check for Tx timestamp */ - adapter->ptp_tx_skb = skb_get(skb); - adapter->ptp_tx_start = jiffies; - schedule_work(&adapter->ptp_tx_work); + adapter->ptp_clock) { + if (!test_and_set_bit_lock(__IXGBE_PTP_TX_IN_PROGRESS, + &adapter->state)) { + skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS; + tx_flags |= IXGBE_TX_FLAGS_TSTAMP; + + /* schedule check for Tx timestamp */ + adapter->ptp_tx_skb = skb_get(skb); + adapter->ptp_tx_start = jiffies; + schedule_work(&adapter->ptp_tx_work); + } else { + adapter->tx_hwtstamp_skipped++; + } } skb_tx_timestamp(skb); |