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Message-ID: <061C8A8601E8EE4CA8D8FD6990CEA891274EE767@ORSMSX102.amr.corp.intel.com>
Date: Tue, 10 Jul 2012 19:17:46 +0000
From: "Dave, Tushar N" <tushar.n.dave@...el.com>
To: Joe Jin <joe.jin@...cle.com>
CC: "e1000-devel@...ts.sf.net" <e1000-devel@...ts.sf.net>,
"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
"Dave, Tushar N" <tushar.n.dave@...el.com>
Subject: RE: 82571EB: Detected Hardware Unit Hang
>-----Original Message-----
>From: Dave, Tushar N
>Sent: Tuesday, July 10, 2012 12:02 PM
>To: Joe Jin
>Cc: e1000-devel@...ts.sf.net; netdev@...r.kernel.org; linux-
>kernel@...r.kernel.org; Dave, Tushar N
>Subject: RE: 82571EB: Detected Hardware Unit Hang
>
>>-----Original Message-----
>>From: netdev-owner@...r.kernel.org
>>[mailto:netdev-owner@...r.kernel.org]
>>On Behalf Of Joe Jin
>>Sent: Tuesday, July 10, 2012 12:40 AM
>>To: Joe Jin
>>Cc: e1000-devel@...ts.sf.net; netdev@...r.kernel.org; linux-
>>kernel@...r.kernel.org
>>Subject: Re: 82571EB: Detected Hardware Unit Hang
>>
>>When I debug the driver I found before Detected HW hang, driver unable
>>to clean and reclaim the resources:
>>
>>1457 while ((eop_desc->upper.data &
>>cpu_to_le32(E1000_TXD_STAT_DD)) && <== at here upper.data always is
>0x300
>>1458 (count < tx_ring->count)) {
>> <--- snip --->
>>1487 }
>>
>>
>>I checked all driver codes I did not found anywhere will set the
>>upper.data with E1000_TXD_STAT_DD, I guess upper.data be set by hardware?
>
>Yes upper.data (part of it is STATUS byte) is set by HW. Basically driver
>checks E1000_TXD_STAT_DD (Descriptor Done) bit. If this bit is set that
>means HW has processed that descriptor and driver can now clean that
>descriptor.
>With value 0x300 , DD bit is not set. That means HW has not processed that
>descriptor.
>
>How fast does tx hang reproduce? I suggest you to enable debug code in
>driver so when tx hang occurs it will dump the HW desc ring info into
>kernel log.
>You can run "ethtool -s ethx msglvl 0x2c00" to enable debug.
>Once tx hang occurs please send me the full dmesg log.
>
>Does tx hang occur with in-kernel e1000e driver too?
>
>Thanks.
>
>-Tushar
One change , please use " ethtool -s ethx msglvl 0x2c01" so to keep default 'drv' msglvl enabled.
Confirm the message level set correctly by running command 'ethtool ethx'.
Last few will be
Current message level: 0x00002c01 (11265)
drv tx_done rx_status hw
>
>
>>If OS is 32bit system, what which happen?
>
>
>>
>>Thanks in advance,
>>Joe
>>
>>On 07/09/12 16:51, Joe Jin wrote:
>>> Hi list,
>>>
>>> I'm seeing a Unit Hang even with the latest e1000e driver 2.0.0 when
>>> doing scp test. this issue is easy do reproduced on SUN FIRE X2270
>>> M2, just copy a big file (>500M) from another server will hit it at
>once.
>>>
>>> Would you please help on this?
>>>
>>> device info:
>>> # lspci -s 05:00.0
>>> 05:00.0 Ethernet controller: Intel Corporation 82571EB Gigabit
>>> Ethernet Controller (Copper) (rev 06)
>>>
>>> # lspci -s 05:00.0 -n
>>> 05:00.0 0200: 8086:10bc (rev 06)
>>>
>>> # ethtool -i eth0
>>> driver: e1000e
>>> version: 2.0.0-NAPI
>>> firmware-version: 5.10-2
>>> bus-info: 0000:05:00.0
>>>
>>> # ethtool -k eth0
>>> Offload parameters for eth0:
>>> rx-checksumming: on
>>> tx-checksumming: on
>>> scatter-gather: on
>>> tcp segmentation offload: on
>>> udp fragmentation offload: off
>>> generic segmentation offload: on
>>> generic-receive-offload: on
>>>
>>> kernel log:
>>> -----------
>>> e1000e 0000:05:00.0: eth0: Detected Hardware Unit Hang:
>>> TDH <6c>
>>> TDT <81>
>>> next_to_use <81>
>>> next_to_clean <6b>
>>> buffer_info[next_to_clean]:
>>> time_stamp <fffc7a23>
>>> next_to_watch <71>
>>> jiffies <fffc8c0c>
>>> next_to_watch.status <0>
>>> MAC Status <80387>
>>> PHY Status <792d>
>>> PHY 1000BASE-T Status <3c00>
>>> PHY Extended Status <3000>
>>> PCI Status <10>
>>> e1000e 0000:05:00.0: eth0: Detected Hardware Unit Hang:
>>> TDH <6c>
>>> TDT <81>
>>> next_to_use <81>
>>> next_to_clean <6b>
>>> buffer_info[next_to_clean]:
>>> time_stamp <fffc7a23>
>>> next_to_watch <71>
>>> jiffies <fffc9bac>
>>> next_to_watch.status <0>
>>> MAC Status <80387>
>>> PHY Status <792d>
>>> PHY 1000BASE-T Status <3c00>
>>> PHY Extended Status <3000>
>>> PCI Status <10>
>>> ------------[ cut here ]------------
>>> WARNING: at net/sched/sch_generic.c:255 dev_watchdog+0x225/0x230()
>>> Hardware name: SUN FIRE X2270 M2 NETDEV WATCHDOG: eth0 (e1000e):
>>> transmit queue 0 timed out Modules linked in: autofs4 hidp rfcomm
>>> bluetooth rfkill lockd sunrpc cpufreq_ondemand acpi_cpufreq mperf
>>> be2iscsi iscsi_boot_sysfs ib_iser rdma_cm ib_cm iw_cm ib_sa ib_mad
>>> ib_core ib_addr iscsi_tcp bnx2i cnic uio ipv6 cxgb3i libcxgbi cxgb3
>>> mdio libiscsi_tcp libiscsi scsi_transport_iscsi video sbs sbshc
>>> acpi_pad acpi_ipmi ipmi_msghandler parport_pc lp parport e1000e(U)
>>> snd_seq_dummy snd_seq_oss snd_seq_midi_event snd_seq snd_seq_device
>>> igb snd_pcm_oss serio_raw snd_mixer_oss snd_pcm tpm_infineon
>>> snd_timer snd soundcore snd_page_alloc i2c_i801 iTCO_wdt i2c_core
>>> pcspkr i7core_edac iTCO_vendor_support ioatdma ghes dca edac_core hed
>>> dm_snapshot dm_zero dm_mirror dm_region_hash dm_log dm_mod
>>> usb_storage sd_mod crc_t10dif sg ahci libahci ext3 jbd mbcache [last
>unloaded:
>>> microcode]
>>> Pid: 0, comm: swapper Not tainted 2.6.39-200.24.1.el5uek #1 Call
>>> Trace:
>>> [<c07d9ac5>] ? dev_watchdog+0x225/0x230 [<c045ba61>]
>>> warn_slowpath_common+0x81/0xa0 [<c07d9ac5>] ?
>>> dev_watchdog+0x225/0x230 [<c045bb23>] warn_slowpath_fmt+0x33/0x40
>>> [<c07d9ac5>] dev_watchdog+0x225/0x230 [<c07d98a0>] ?
>>> dev_activate+0xb0/0xb0 [<c0468e82>] call_timer_fn+0x32/0xf0
>>> [<c04bceb0>] ? rcu_check_callbacks+0x80/0x80 [<c046a76d>]
>>> run_timer_softirq+0xed/0x1b0 [<c07d98a0>] ? dev_activate+0xb0/0xb0
>>> [<c0461a81>] __do_softirq+0x91/0x1a0 [<c04619f0>] ?
>>> local_bh_enable+0x80/0x80 <IRQ> [<c0462295>] ? irq_exit+0x95/0xa0
>>> [<c087f8b8>] ? smp_apic_timer_interrupt+0x38/0x42
>>> [<c08784f5>] ? apic_timer_interrupt+0x31/0x38 [<c046007b>] ?
>>> do_exit+0x11b/0x370 [<c065eae4>] ? intel_idle+0xa4/0x100
>>> [<c078d9b9>] ? cpuidle_idle_call+0xb9/0x1e0 [<c0411d77>] ?
>>> cpu_idle+0x97/0xd0 [<c085cbbd>] ? rest_init+0x5d/0x70 [<c0b07a7a>] ?
>>> start_kernel+0x28a/0x340 [<c0b074b0>] ?
>>> obsolete_checksetup+0xb0/0xb0 [<c0b070a4>] ?
>>> i386_start_kernel+0x64/0xb0 ---[ end trace 5502b55cd4d4e5cb ]---
>>> e1000e 0000:05:00.0: eth0: Reset adapter
>>> e1000e: eth0 NIC Link is Up 1000 Mbps Full Duplex, Flow Control:
>>> Rx/Tx
>>>
>>> Thanks,
>>> Joe
>>>
>>
>>
>>--
>>Oracle <http://www.oracle.com>
>>Joe Jin | Software Development Senior Manager | +8610.6106.5624 ORACLE
>>| Linux and Virtualization No. 24 Zhongguancun Software Park, Haidian
>>District | 100193 Beijing
>>
>>
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