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Date: Tue, 06 May 2008 10:04:29 -0700 From: Ben Greear <greearb@...delatech.com> To: NetDev <netdev@...r.kernel.org> Subject: Detected Tx Unit Hang in ixgbe, kernel 2.6.25 I'm using a 10Gbps copper(CX4) dual-port NIC from silicomusa.com. It uses the Intel chipset and ixgbe driver. I'm using kernel 2.6.25 plus some hacks (no patches to ixgbe). This particular test case was to create 500 mac-vlans on each of the two ports and generate UDP traffic between them (I have a version of the send-to-self patch applied to my kernel and enabled.) During the setup for this test, the interfaces would have been bounced (effectively ifdown, ifup), so that is the reason for the link going up and down. I noticed 90%+ drop rate when I first started the test, and then after maybe 1-2 minutes, things calmed down and started working. I checked /var/log/messages and saw the messages below. I previously ran 5Gbps of traffic through the two ports with them acting like a bridge for more than 24-hours without any obvious problems, so I think the hardware is probably OK. May 6 09:51:41 simech-ice kernel: ixgbe: eth3: ixgbe_check_tx_hang: Detected Tx Unit Hang May 6 09:51:41 simech-ice kernel: TDH <1e> May 6 09:51:41 simech-ice kernel: TDT <3ff> May 6 09:51:41 simech-ice kernel: next_to_use <3ff> May 6 09:51:41 simech-ice kernel: next_to_clean <1a> May 6 09:51:41 simech-ice kernel: tx_buffer_info[next_to_clean] May 6 09:51:41 simech-ice kernel: time_stamp <11e035210> May 6 09:51:41 simech-ice kernel: next_to_watch <1b> May 6 09:51:41 simech-ice kernel: jiffies <11e035862> May 6 09:51:41 simech-ice kernel: next_to_watch.status <17a8209> May 6 09:51:41 simech-ice kernel: ixgbe: eth2: ixgbe_check_tx_hang: Detected Tx Unit Hang May 6 09:51:41 simech-ice kernel: TDH <3d6> May 6 09:51:41 simech-ice kernel: TDT <3b0> May 6 09:51:41 simech-ice kernel: next_to_use <3b0> May 6 09:51:41 simech-ice kernel: next_to_clean <3d2> May 6 09:51:41 simech-ice kernel: tx_buffer_info[next_to_clean] May 6 09:51:41 simech-ice kernel: time_stamp <11e035211> May 6 09:51:41 simech-ice kernel: next_to_watch <3d3> May 6 09:51:41 simech-ice kernel: jiffies <11e035887> May 6 09:51:41 simech-ice kernel: next_to_watch.status <17a8209> May 6 09:51:46 simech-ice kernel: ixgbe: eth3: ixgbe_check_tx_hang: Detected Tx Unit Hang May 6 09:51:46 simech-ice kernel: TDH <28d> May 6 09:51:46 simech-ice kernel: TDT <26c> May 6 09:51:46 simech-ice kernel: next_to_use <26c> May 6 09:51:46 simech-ice kernel: next_to_clean <289> May 6 09:51:46 simech-ice kernel: tx_buffer_info[next_to_clean] May 6 09:51:46 simech-ice kernel: time_stamp <11e0363e0> May 6 09:51:46 simech-ice kernel: next_to_watch <28a> May 6 09:51:46 simech-ice kernel: jiffies <11e036e8e> May 6 09:51:46 simech-ice kernel: next_to_watch.status <17a8209> May 6 09:51:46 simech-ice kernel: ixgbe: eth2: ixgbe_check_tx_hang: Detected Tx Unit Hang May 6 09:51:46 simech-ice kernel: TDH <1bd> May 6 09:51:46 simech-ice kernel: TDT <19c> May 6 09:51:46 simech-ice kernel: next_to_use <19c> May 6 09:51:46 simech-ice kernel: next_to_clean <1b9> May 6 09:51:46 simech-ice kernel: tx_buffer_info[next_to_clean] May 6 09:51:46 simech-ice kernel: time_stamp <11e036346> May 6 09:51:46 simech-ice kernel: next_to_watch <1ba> May 6 09:51:46 simech-ice kernel: jiffies <11e036e9a> May 6 09:51:46 simech-ice kernel: next_to_watch.status <17a8209> May 6 09:51:47 simech-ice kernel: ixgbe: eth2: ixgbe_check_tx_hang: Detected Tx Unit Hang May 6 09:51:47 simech-ice kernel: TDH <29e> May 6 09:51:47 simech-ice kernel: TDT <27c> May 6 09:51:47 simech-ice kernel: next_to_use <27c> May 6 09:51:47 simech-ice kernel: next_to_clean <29a> May 6 09:51:47 simech-ice kernel: tx_buffer_info[next_to_clean] May 6 09:51:47 simech-ice kernel: time_stamp <11e0363e0> May 6 09:51:47 simech-ice kernel: next_to_watch <29b> May 6 09:51:47 simech-ice kernel: jiffies <11e036fee> May 6 09:51:47 simech-ice kernel: next_to_watch.status <17a8209> May 6 09:51:47 simech-ice kernel: ixgbe: eth3: ixgbe_check_tx_hang: Detected Tx Unit Hang May 6 09:51:47 simech-ice kernel: TDH <33f> May 6 09:51:47 simech-ice kernel: TDT <321> May 6 09:51:47 simech-ice kernel: next_to_use <321> May 6 09:51:47 simech-ice kernel: next_to_clean <33b> May 6 09:51:47 simech-ice kernel: tx_buffer_info[next_to_clean] May 6 09:51:47 simech-ice kernel: time_stamp <11e0363e2> May 6 09:51:47 simech-ice kernel: next_to_watch <33c> May 6 09:51:47 simech-ice kernel: jiffies <11e036ff5> May 6 09:51:47 simech-ice kernel: next_to_watch.status <17a8209> May 6 09:51:51 simech-ice kernel: ixgbe: eth2: ixgbe_check_tx_hang: Detected Tx Unit Hang May 6 09:51:51 simech-ice kernel: TDH <398> May 6 09:51:51 simech-ice kernel: TDT <374> May 6 09:51:51 simech-ice kernel: next_to_use <374> May 6 09:51:51 simech-ice kernel: next_to_clean <394> May 6 09:51:51 simech-ice kernel: tx_buffer_info[next_to_clean] May 6 09:51:51 simech-ice kernel: time_stamp <11e037748> May 6 09:51:51 simech-ice kernel: next_to_watch <395> May 6 09:51:51 simech-ice kernel: jiffies <11e038251> May 6 09:51:51 simech-ice kernel: next_to_watch.status <17a8209> May 6 09:51:51 simech-ice kernel: ixgbe: eth3: ixgbe_check_tx_hang: Detected Tx Unit Hang May 6 09:51:51 simech-ice kernel: TDH <101> May 6 09:51:51 simech-ice kernel: TDT <dd> May 6 09:51:51 simech-ice kernel: next_to_use <dd> May 6 09:51:51 simech-ice kernel: next_to_clean <fd> May 6 09:51:51 simech-ice kernel: tx_buffer_info[next_to_clean] May 6 09:51:51 simech-ice kernel: time_stamp <11e037743> May 6 09:51:51 simech-ice kernel: next_to_watch <fe> May 6 09:51:51 simech-ice kernel: jiffies <11e03825c> May 6 09:51:51 simech-ice kernel: next_to_watch.status <17a8209> May 6 09:52:00 simech-ice kernel: ixgbe: eth3: ixgbe_check_tx_hang: Detected Tx Unit Hang May 6 09:52:00 simech-ice kernel: TDH <2b5> May 6 09:52:00 simech-ice kernel: TDT <292> May 6 09:52:00 simech-ice kernel: next_to_use <292> May 6 09:52:00 simech-ice kernel: next_to_clean <2b1> May 6 09:52:00 simech-ice kernel: tx_buffer_info[next_to_clean] May 6 09:52:00 simech-ice kernel: time_stamp <11e038937> May 6 09:52:00 simech-ice kernel: next_to_watch <2b2> May 6 09:52:00 simech-ice kernel: jiffies <11e03a29c> May 6 09:52:00 simech-ice kernel: next_to_watch.status <17a8209> May 6 09:52:00 simech-ice kernel: ixgbe: eth2: ixgbe_check_tx_hang: Detected Tx Unit Hang May 6 09:52:00 simech-ice kernel: TDH <8> May 6 09:52:00 simech-ice kernel: TDT <3e6> May 6 09:52:00 simech-ice kernel: next_to_use <3e6> May 6 09:52:00 simech-ice kernel: next_to_clean <4> May 6 09:52:00 simech-ice kernel: tx_buffer_info[next_to_clean] May 6 09:52:00 simech-ice kernel: time_stamp <11e038957> May 6 09:52:00 simech-ice kernel: next_to_watch <5> May 6 09:52:00 simech-ice kernel: jiffies <11e03a2d5> May 6 09:52:00 simech-ice kernel: next_to_watch.status <17a8209> May 6 09:52:11 simech-ice kernel: NETDEV WATCHDOG: eth3: transmit timed out May 6 09:52:11 simech-ice kernel: NETDEV WATCHDOG: eth2: transmit timed out May 6 09:52:11 simech-ice kernel: ixgbe: eth3: ixgbe_watchdog: NIC Link is Down May 6 09:52:11 simech-ice kernel: ixgbe: eth3: ixgbe_check_tx_hang: Detected Tx Unit Hang May 6 09:52:11 simech-ice kernel: TDH <18c> May 6 09:52:11 simech-ice kernel: TDT <12a> May 6 09:52:11 simech-ice kernel: next_to_use <12a> May 6 09:52:11 simech-ice kernel: next_to_clean <188> May 6 09:52:11 simech-ice kernel: tx_buffer_info[next_to_clean] May 6 09:52:11 simech-ice kernel: time_stamp <11e03aa83> May 6 09:52:11 simech-ice kernel: next_to_watch <189> May 6 09:52:11 simech-ice kernel: jiffies <11e03cde1> May 6 09:52:11 simech-ice kernel: next_to_watch.status <17a8209> May 6 09:52:11 simech-ice kernel: ixgbe: eth2: ixgbe_watchdog: NIC Link is Up 10 Gbps, Flow Control: RX/TX May 6 09:52:11 simech-ice kernel: ixgbe: eth2: ixgbe_watchdog: NIC Link is Down May 6 09:52:11 simech-ice kernel: ADDRCONF(NETDEV_UP): eth3#435: link is not ready May 6 09:52:11 simech-ice kernel: ixgbe: eth3: ixgbe_watchdog: NIC Link is Up 10 Gbps, Flow Control: RX/TX May 6 09:52:11 simech-ice kernel: ixgbe: eth2: ixgbe_watchdog: NIC Link is Up 10 Gbps, Flow Control: RX/TX May 6 09:52:11 simech-ice kernel: ADDRCONF(NETDEV_CHANGE): eth3#435: link becomes ready May 6 09:52:22 simech-ice kernel: NETDEV WATCHDOG: eth3: transmit timed out May 6 09:52:22 simech-ice kernel: NETDEV WATCHDOG: eth2: transmit timed out May 6 09:52:23 simech-ice kernel: ixgbe: eth2: ixgbe_watchdog: NIC Link is Down May 6 09:52:23 simech-ice kernel: ixgbe: eth2: ixgbe_check_tx_hang: Detected Tx Unit Hang May 6 09:52:23 simech-ice kernel: TDH <19b> May 6 09:52:23 simech-ice kernel: TDT <173> May 6 09:52:23 simech-ice kernel: next_to_use <173> May 6 09:52:23 simech-ice kernel: next_to_clean <197> May 6 09:52:23 simech-ice kernel: tx_buffer_info[next_to_clean] May 6 09:52:23 simech-ice kernel: time_stamp <11e03d200> May 6 09:52:23 simech-ice kernel: next_to_watch <198> May 6 09:52:23 simech-ice kernel: jiffies <11e03fcd1> May 6 09:52:23 simech-ice kernel: next_to_watch.status <17a8209> May 6 09:52:23 simech-ice kernel: ixgbe: eth2: ixgbe_watchdog: NIC Link is Up 10 Gbps, Flow Control: RX/TX May 6 09:52:23 simech-ice kernel: ixgbe: eth2: ixgbe_watchdog: NIC Link is Down May 6 09:52:23 simech-ice kernel: ixgbe: eth3: ixgbe_watchdog: NIC Link is Up 10 Gbps, Flow Control: RX/TX May 6 09:52:23 simech-ice kernel: ixgbe: eth3: ixgbe_watchdog: NIC Link is Down May 6 09:52:23 simech-ice kernel: ixgbe: eth3: ixgbe_watchdog: NIC Link is Up 10 Gbps, Flow Control: RX/TX May 6 09:52:23 simech-ice kernel: ixgbe: eth3: ixgbe_watchdog: NIC Link is Down May 6 09:52:23 simech-ice kernel: ixgbe: eth3: ixgbe_watchdog: NIC Link is Up 10 Gbps, Flow Control: RX/TX May 6 09:52:23 simech-ice kernel: ixgbe: eth2: ixgbe_watchdog: NIC Link is Up 10 Gbps, Flow Control: RX/TX May 6 09:52:27 simech-ice kernel: ixgbe: eth3: ixgbe_check_tx_hang: Detected Tx Unit Hang May 6 09:52:27 simech-ice kernel: TDH <6> May 6 09:52:27 simech-ice kernel: TDT <3e4> May 6 09:52:27 simech-ice kernel: next_to_use <3e4> May 6 09:52:27 simech-ice kernel: next_to_clean <2> May 6 09:52:27 simech-ice kernel: tx_buffer_info[next_to_clean] May 6 09:52:27 simech-ice kernel: time_stamp <11e0400bb> May 6 09:52:27 simech-ice kernel: next_to_watch <3> May 6 09:52:27 simech-ice kernel: jiffies <11e040d75> May 6 09:52:27 simech-ice kernel: next_to_watch.status <17a8209> May 6 09:52:34 simech-ice kernel: NETDEV WATCHDOG: eth3: transmit timed out May 6 09:52:34 simech-ice kernel: ixgbe: eth2: ixgbe_watchdog: NIC Link is Down May 6 09:52:34 simech-ice kernel: ixgbe: eth2: ixgbe_watchdog: NIC Link is Up 10 Gbps, Flow Control: RX/TX May 6 09:52:34 simech-ice kernel: ixgbe: eth2: ixgbe_watchdog: NIC Link is Down May 6 09:52:34 simech-ice kernel: ixgbe: eth2: ixgbe_watchdog: NIC Link is Up 10 Gbps, Flow Control: RX/TX May 6 09:52:34 simech-ice kernel: ixgbe: eth3: ixgbe_watchdog: NIC Link is Up 10 Gbps, Flow Control: RX/TX May 6 09:52:42 simech-ice kernel: ixgbe: eth3: ixgbe_check_tx_hang: Detected Tx Unit Hang May 6 09:52:42 simech-ice kernel: TDH <189> May 6 09:52:42 simech-ice kernel: TDT <159> May 6 09:52:42 simech-ice kernel: next_to_use <159> May 6 09:52:42 simech-ice kernel: next_to_clean <184> May 6 09:52:42 simech-ice kernel: tx_buffer_info[next_to_clean] May 6 09:52:42 simech-ice kernel: time_stamp <11e042edb> May 6 09:52:42 simech-ice kernel: next_to_watch <185> May 6 09:52:42 simech-ice kernel: jiffies <11e0449ec> May 6 09:52:42 simech-ice kernel: next_to_watch.status <17a8209> May 6 09:52:45 simech-ice kernel: NETDEV WATCHDOG: eth2: transmit timed out May 6 09:52:48 simech-ice kernel: ixgbe: eth2: ixgbe_check_tx_hang: Detected Tx Unit Hang May 6 09:52:48 simech-ice kernel: TDH <d> May 6 09:52:48 simech-ice kernel: TDT <3e6> May 6 09:52:48 simech-ice kernel: next_to_use <3e6> May 6 09:52:48 simech-ice kernel: next_to_clean <9> May 6 09:52:48 simech-ice kernel: tx_buffer_info[next_to_clean] May 6 09:52:48 simech-ice kernel: time_stamp <11e042de5> May 6 09:52:48 simech-ice kernel: next_to_watch <a> May 6 09:52:48 simech-ice kernel: jiffies <11e045e0b> May 6 09:52:48 simech-ice kernel: next_to_watch.status <17a8209> May 6 09:52:48 simech-ice kernel: ixgbe: eth2: ixgbe_check_tx_hang: Detected Tx Unit Hang May 6 09:52:48 simech-ice kernel: TDH <78> May 6 09:52:48 simech-ice kernel: TDT <52> May 6 09:52:48 simech-ice kernel: next_to_use <52> May 6 09:52:48 simech-ice kernel: next_to_clean <73> May 6 09:52:48 simech-ice kernel: tx_buffer_info[next_to_clean] May 6 09:52:48 simech-ice kernel: time_stamp <11e042e11> May 6 09:52:48 simech-ice kernel: next_to_watch <74> May 6 09:52:48 simech-ice kernel: jiffies <11e045e7c> May 6 09:52:48 simech-ice kernel: next_to_watch.status <17a8209> May 6 09:52:48 simech-ice kernel: ixgbe: eth3: ixgbe_watchdog: NIC Link is Down May 6 09:52:48 simech-ice kernel: ixgbe: eth3: ixgbe_watchdog: NIC Link is Up 10 Gbps, Flow Control: RX/TX May 6 09:52:48 simech-ice kernel: ixgbe: eth3: ixgbe_watchdog: NIC Link is Down May 6 09:52:48 simech-ice kernel: ixgbe: eth2: ixgbe_watchdog: NIC Link is Up 10 Gbps, Flow Control: RX/TX May 6 09:52:48 simech-ice kernel: ixgbe: eth3: ixgbe_watchdog: NIC Link is Up 10 Gbps, Flow Control: RX/TX May 6 09:52:59 simech-ice kernel: NETDEV WATCHDOG: eth3: transmit timed out May 6 09:52:59 simech-ice kernel: NETDEV WATCHDOG: eth2: transmit timed out May 6 09:52:59 simech-ice kernel: ixgbe: eth2: ixgbe_watchdog: NIC Link is Up 10 Gbps, Flow Control: RX/TX May 6 09:52:59 simech-ice kernel: ixgbe: eth3: ixgbe_watchdog: NIC Link is Up 10 Gbps, Flow Control: RX/TX May 6 09:53:07 simech-ice kernel: ixgbe: eth2: ixgbe_check_tx_hang: Detected Tx Unit Hang May 6 09:53:07 simech-ice kernel: TDH <28> May 6 09:53:07 simech-ice kernel: TDT <3> May 6 09:53:07 simech-ice kernel: next_to_use <3> May 6 09:53:07 simech-ice kernel: next_to_clean <23> May 6 09:53:07 simech-ice kernel: tx_buffer_info[next_to_clean] May 6 09:53:07 simech-ice kernel: time_stamp <11e049a4d> May 6 09:53:07 simech-ice kernel: next_to_watch <24> May 6 09:53:07 simech-ice kernel: jiffies <11e04a866> May 6 09:53:07 simech-ice kernel: next_to_watch.status <17a8209> May 6 09:53:07 simech-ice kernel: ixgbe: eth3: ixgbe_check_tx_hang: Detected Tx Unit Hang May 6 09:53:07 simech-ice kernel: TDH <2ad> May 6 09:53:07 simech-ice kernel: TDT <28c> May 6 09:53:07 simech-ice kernel: next_to_use <28c> May 6 09:53:07 simech-ice kernel: next_to_clean <2a7> May 6 09:53:07 simech-ice kernel: tx_buffer_info[next_to_clean] May 6 09:53:07 simech-ice kernel: time_stamp <11e04979e> May 6 09:53:07 simech-ice kernel: next_to_watch <2a8> May 6 09:53:07 simech-ice kernel: jiffies <11e04a880> May 6 09:53:07 simech-ice kernel: next_to_watch.status <17a8209> May 6 09:53:10 simech-ice kernel: ixgbe: eth3: ixgbe_check_tx_hang: Detected Tx Unit Hang May 6 09:53:10 simech-ice kernel: TDH <129> May 6 09:53:10 simech-ice kernel: TDT <103> May 6 09:53:10 simech-ice kernel: next_to_use <103> May 6 09:53:10 simech-ice kernel: next_to_clean <125> May 6 09:53:10 simech-ice kernel: tx_buffer_info[next_to_clean] May 6 09:53:10 simech-ice kernel: time_stamp <11e04b236> May 6 09:53:10 simech-ice kernel: next_to_watch <126> May 6 09:53:10 simech-ice kernel: jiffies <11e04b61f> May 6 09:53:10 simech-ice kernel: next_to_watch.status <17a8209> May 6 09:53:14 simech-ice kernel: ixgbe: eth3: ixgbe_check_tx_hang: Detected Tx Unit Hang May 6 09:53:14 simech-ice kernel: TDH <18e> May 6 09:53:14 simech-ice kernel: TDT <165> May 6 09:53:14 simech-ice kernel: next_to_use <165> May 6 09:53:14 simech-ice kernel: next_to_clean <189> May 6 09:53:14 simech-ice kernel: tx_buffer_info[next_to_clean] May 6 09:53:14 simech-ice kernel: time_stamp <11e04b24c> May 6 09:53:14 simech-ice kernel: next_to_watch <18a> May 6 09:53:14 simech-ice kernel: jiffies <11e04c4e4> May 6 09:53:14 simech-ice kernel: next_to_watch.status <17a8209> May 6 09:53:14 simech-ice kernel: ixgbe: eth2: ixgbe_check_tx_hang: Detected Tx Unit Hang May 6 09:53:14 simech-ice kernel: TDH <3b> May 6 09:53:14 simech-ice kernel: TDT <16> May 6 09:53:14 simech-ice kernel: next_to_use <16> May 6 09:53:14 simech-ice kernel: next_to_clean <37> May 6 09:53:14 simech-ice kernel: tx_buffer_info[next_to_clean] May 6 09:53:14 simech-ice kernel: time_stamp <11e04b1d7> May 6 09:53:14 simech-ice kernel: next_to_watch <38> May 6 09:53:14 simech-ice kernel: jiffies <11e04c6e3> May 6 09:53:14 simech-ice kernel: next_to_watch.status <17a8209> Thanks, Ben -- Ben Greear <greearb@...delatech.com> Candela Technologies Inc http://www.candelatech.com -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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