From c3b8f85ec24674896aac9a6e41235b8d38db3dde Mon Sep 17 00:00:00 2001 From: Jacob Keller Date: Wed, 3 May 2017 10:28:59 -0700 Subject: [PATCH] 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: Jacob Keller Tested-by: Aaron Brown Signed-off-by: Jeff Kirsher --- drivers/net/ethernet/intel/igb/igb.h | 1 + drivers/net/ethernet/intel/igb/igb_ethtool.c | 1 + drivers/net/ethernet/intel/igb/igb_main.c | 2 ++ 3 files changed, 4 insertions(+) diff --git a/drivers/net/ethernet/intel/igb/igb.h b/drivers/net/ethernet/intel/igb/igb.h index bf9bf90..be35edc 100644 --- a/drivers/net/ethernet/intel/igb/igb.h +++ b/drivers/net/ethernet/intel/igb/igb.h @@ -563,6 +563,7 @@ struct igb_adapter { struct cyclecounter cc; struct timecounter tc; u32 tx_hwtstamp_timeouts; + u32 tx_hwtstamp_skipped; u32 rx_hwtstamp_cleared; bool pps_sys_wrap_on; diff --git a/drivers/net/ethernet/intel/igb/igb_ethtool.c b/drivers/net/ethernet/intel/igb/igb_ethtool.c index 0efb62d..8730f7c 100644 --- a/drivers/net/ethernet/intel/igb/igb_ethtool.c +++ b/drivers/net/ethernet/intel/igb/igb_ethtool.c @@ -90,6 +90,7 @@ static const struct igb_stats igb_gstrings_stats[] = { IGB_STAT("os2bmc_tx_by_host", stats.o2bspc), IGB_STAT("os2bmc_rx_by_host", stats.b2ogprc), IGB_STAT("tx_hwtstamp_timeouts", tx_hwtstamp_timeouts), + IGB_STAT("tx_hwtstamp_skipped", tx_hwtstamp_skipped), IGB_STAT("rx_hwtstamp_cleared", rx_hwtstamp_cleared), }; diff --git a/drivers/net/ethernet/intel/igb/igb_main.c b/drivers/net/ethernet/intel/igb/igb_main.c index fefa461..06b81a60 100644 --- a/drivers/net/ethernet/intel/igb/igb_main.c +++ b/drivers/net/ethernet/intel/igb/igb_main.c @@ -5388,6 +5388,8 @@ netdev_tx_t igb_xmit_frame_ring(struct sk_buff *skb, adapter->ptp_tx_start = jiffies; if (adapter->hw.mac.type == e1000_82576) schedule_work(&adapter->ptp_tx_work); + } else { + adapter->tx_hwtstamp_skipped++; } } -- 2.7.4