Commit c3b8f85e authored by Jacob Keller's avatar Jacob Keller Committed by Jeff Kirsher

igb: add statistic indicating number of skipped Tx timestamps

The igb 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: default avatarJacob Keller <jacob.e.keller@intel.com>
Tested-by: default avatarAaron Brown <aaron.f.brown@intel.com>
Signed-off-by: default avatarJeff Kirsher <jeffrey.t.kirsher@intel.com>
parent cff57141
...@@ -563,6 +563,7 @@ struct igb_adapter { ...@@ -563,6 +563,7 @@ struct igb_adapter {
struct cyclecounter cc; struct cyclecounter cc;
struct timecounter tc; struct timecounter tc;
u32 tx_hwtstamp_timeouts; u32 tx_hwtstamp_timeouts;
u32 tx_hwtstamp_skipped;
u32 rx_hwtstamp_cleared; u32 rx_hwtstamp_cleared;
bool pps_sys_wrap_on; bool pps_sys_wrap_on;
......
...@@ -90,6 +90,7 @@ static const struct igb_stats igb_gstrings_stats[] = { ...@@ -90,6 +90,7 @@ static const struct igb_stats igb_gstrings_stats[] = {
IGB_STAT("os2bmc_tx_by_host", stats.o2bspc), IGB_STAT("os2bmc_tx_by_host", stats.o2bspc),
IGB_STAT("os2bmc_rx_by_host", stats.b2ogprc), IGB_STAT("os2bmc_rx_by_host", stats.b2ogprc),
IGB_STAT("tx_hwtstamp_timeouts", tx_hwtstamp_timeouts), IGB_STAT("tx_hwtstamp_timeouts", tx_hwtstamp_timeouts),
IGB_STAT("tx_hwtstamp_skipped", tx_hwtstamp_skipped),
IGB_STAT("rx_hwtstamp_cleared", rx_hwtstamp_cleared), IGB_STAT("rx_hwtstamp_cleared", rx_hwtstamp_cleared),
}; };
......
...@@ -5388,6 +5388,8 @@ netdev_tx_t igb_xmit_frame_ring(struct sk_buff *skb, ...@@ -5388,6 +5388,8 @@ netdev_tx_t igb_xmit_frame_ring(struct sk_buff *skb,
adapter->ptp_tx_start = jiffies; adapter->ptp_tx_start = jiffies;
if (adapter->hw.mac.type == e1000_82576) if (adapter->hw.mac.type == e1000_82576)
schedule_work(&adapter->ptp_tx_work); schedule_work(&adapter->ptp_tx_work);
} else {
adapter->tx_hwtstamp_skipped++;
} }
} }
......
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