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authorJacob Keller <jacob.e.keller@intel.com>2017-05-03 10:28:59 -0700
committerJeff Kirsher <jeffrey.t.kirsher@intel.com>2017-06-06 01:02:05 -0700
commitc3b8f85ec24674896aac9a6e41235b8d38db3dde (patch)
tree65c17115c071d47dbb24da6f5cba7c99f50d10cc /drivers/net/ethernet/intel/igb
parente1000e: add statistic indicating number of skipped Tx timestamps (diff)
downloadlinux-dev-c3b8f85ec24674896aac9a6e41235b8d38db3dde.tar.xz
linux-dev-c3b8f85ec24674896aac9a6e41235b8d38db3dde.zip
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 <jacob.e.keller@intel.com> Tested-by: Aaron Brown <aaron.f.brown@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Diffstat (limited to 'drivers/net/ethernet/intel/igb')
-rw-r--r--drivers/net/ethernet/intel/igb/igb.h1
-rw-r--r--drivers/net/ethernet/intel/igb/igb_ethtool.c1
-rw-r--r--drivers/net/ethernet/intel/igb/igb_main.c2
3 files changed, 4 insertions, 0 deletions
diff --git a/drivers/net/ethernet/intel/igb/igb.h b/drivers/net/ethernet/intel/igb/igb.h
index bf9bf9056d0c..be35edcf6b08 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 0efb62db6efd..8730f7cbce68 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 fefa46120cbc..06b81a609fa0 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++;
}
}