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

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

drivers/net/ethernet/intel/igb/igb.h

+1 −0
Original line number Original line Diff line number Diff line
@@ -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;

drivers/net/ethernet/intel/igb/igb_ethtool.c

+1 −0
Original line number Original line Diff line number Diff line
@@ -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),

};

};

drivers/net/ethernet/intel/igb/igb_main.c

+2 −0
Original line number Original line Diff line number Diff line
@@ -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++;

		}

		}

	}

	}