BUG: мягкая блокировка - CPU # 0 застрял
Я запускаю некоторые приложения SD-WAN, такие как коммутация SDN, маршрутизация и т. д., в GUEST-узле (Ubuntu Linux 14.04 VM), который размещен в вычислительном узле среды Openstack.
Host Node подробнее:
root@host-node:/var/log/nova# uname -r
4.4.0-71-generic
root@host-node:/var/log/nova# dpkg -l | egrep -i 'qemu|kvm|libvirt'
ii ipxe-qemu 1.0.0+git-20150424.a25a16d-1ubuntu1 all PXE boot firmware - ROM images for qemu
ii libvirt-bin 1.3.1-1ubuntu10.15 amd64 programs for the libvirt library
ii libvirt0:amd64 1.3.1-1ubuntu10.15 amd64 library for interfacing with different virtualization systems
ii python-libvirt 1.3.1-1ubuntu1 amd64 libvirt Python bindings
ii qemu 1:2.5+dfsg-5ubuntu10.14 amd64 fast processor emulator
ii qemu-block-extra:amd64 1:2.5+dfsg-5ubuntu10.16 amd64 extra block backend modules for qemu-system and qemu-utils
ii qemu-slof 20151103+dfsg-1ubuntu1 all Slimline Open Firmware – QEMU PowerPC version
ii qemu-system 1:2.5+dfsg-5ubuntu10.16 amd64 QEMU full system emulation binaries
ii qemu-system-arm 1:2.5+dfsg-5ubuntu10.16 amd64 QEMU full system emulation binaries (arm)
ii qemu-system-common 1:2.5+dfsg-5ubuntu10.16 amd64 QEMU full system emulation binaries (common files)
ii qemu-system-mips 1:2.5+dfsg-5ubuntu10.16 amd64 QEMU full system emulation binaries (mips)
ii qemu-system-misc 1:2.5+dfsg-5ubuntu10.16 amd64 QEMU full system emulation binaries (miscelaneous)
ii qemu-system-ppc 1:2.5+dfsg-5ubuntu10.16 amd64 QEMU full system emulation binaries (ppc)
ii qemu-system-sparc 1:2.5+dfsg-5ubuntu10.16 amd64 QEMU full system emulation binaries (sparc)
ii qemu-system-x86 1:2.5+dfsg-5ubuntu10.16 amd64 QEMU full system emulation binaries (x86)
ii qemu-user 1:2.5+dfsg-5ubuntu10.14 amd64 QEMU user mode emulation binaries
ii qemu-utils 1:2.5+dfsg-5ubuntu10.16 amd64 QEMU utilities
CPU
processor : 47
vendor_id : GenuineIntel
cpu family : 6
model : 63
model name : Intel(R) Xeon(R) CPU E5-2690 v3 @ 2.60GHz
stepping : 2
microcode : 0x38
cpu MHz : 2902.046
cache size : 30720 KB
physical id : 1
siblings : 24
core id : 13
cpu cores : 12
apicid : 59
initial apicid : 59
fpu : yes
fpu_exception : yes
cpuid level : 15
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1gb rdtscp lm constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc aperfmperf eagerfpu pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2 ssse3 sdbg fma cx16 xtpr pdcm pcid dca sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm abm epb tpr_shadow vnmi flexpriority ept vpid fsgsbase tsc_adjust bmi1 avx2 smep bmi2 erms invpcid cqm xsaveopt cqm_llc cqm_occup_llc dtherm ida arat pln pts
bugs :
bogomips : 5194.87
clflush size : 64
cache_alignment : 64
address sizes : 46 bits physical, 48 bits virtual
power management:
root@host-node:/var/log/nova# free -m
total used free shared buff/cache available
Mem: 773931 186967 490462 4070 96502 576184
Swap: 0 0 0
Неожиданно узел GUEST (где работает приложение SDN) недоступен любыми способами (Not pinging, NO SSH). Даже в консоли Openstack Horizon Dashboard замораживается.
Openstack environment
Ниже размещены журналы консоли.
[1263400.052002] BUG: soft lockup - CPU#0 stuck for 22s! [XXXX:1722]
[1263436.850392] BUG: soft lockup - CPU#12 stuck for 31s! [python:2059]
[1263436.855480] BUG: soft lockup - CPU#1 stuck for 57s! [sleep:18861]
[1263436.852476] BUG: soft lockup - CPU#8 stuck for 38s! [monit:1864]
[1263436.850131] [sched_delayed] sched: RT throttling activated
[1263436.855565] Modules linked in:
[1263436.850392] Modules linked in:
[1263436.855924]
[1263436.855924] CPU: 1 PID: 18861 Comm: sleep Tainted: G OE 3.16.0-77-generic #99~14.04.1-Ubuntu
[1263436.852476] CPU: 8 PID: 1864 Comm: monit Tainted: G OE 3.16.0-77-generic #99~14.04.1-Ubuntu
[1263436.850392] CPU: 12 PID: 2059 Comm: python Tainted: G OE 3.16.0-77-generic #99~14.04.1-Ubuntu
[1263436.855924] Hardware name: OpenStack Foundation OpenStack Nova, BIOS Ubuntu-1.8.2-1ubuntu1 04/01/2014
[1263436.852476] Hardware name: OpenStack Foundation OpenStack Nova, BIOS Ubuntu-1.8.2-1ubuntu1 04/01/2014
[1263436.850392] Hardware name: OpenStack Foundation OpenStack Nova, BIOS Ubuntu-1.8.2-1ubuntu1 04/01/2014
[1263436.855924] task: ffff88055f497010 ti: ffff88055bc68000 task.ti: ffff88055bc68000
[1263436.852476] task: ffff880812045180 ti: ffff8800bb840000 task.ti: ffff8800bb840000
[1263436.850392] task: ffff8800bb281460 ti: ffff880811b94000 task.ti: ffff880811b94000
[1263436.852476] RIP: 0010:[<ffffffff81776676>]
[1263436.850392] RIP: 0010:[<ffffffff811b9275>]
Детали узла GUEST:
uname -a
Linux Guest-node 3.16.0-77-generic #99~14.04.1-Ubuntu SMP Tue Jun 28 19:17:10 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux
uname -r
3.16.0-77-generic
Примечание. Когда узел GUEST заморожен, HOST Compute в среде Openstack показывает 100% использование ЦП во всех 16 ядрах.
Threads: 19 total, 16 running, 3 sleeping, 0 stopped, 0 zombie
%Cpu(s): 3.8 us, 6.5 sy, 0.0 ni, 89.5 id, 0.0 wa, 0.0 hi, 0.2 si, 0.0 st
KiB Mem : 79250592+total, 55210470+free, 18854126+used, 51860008 buff/cache
KiB Swap: 0 total, 0 free, 0 used. 59347756+avail Mem
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
20666 libvirt+ 20 0 37.586g 0.013t 26076 R 99.9 1.8 20126:42 qemu-system-x86
20654 libvirt+ 20 0 37.586g 0.013t 26076 R 93.8 1.8 20123:30 qemu-system-x86
20655 libvirt+ 20 0 37.586g 0.013t 26076 R 93.8 1.8 20127:04 qemu-system-x86
20656 libvirt+ 20 0 37.586g 0.013t 26076 R 93.8 1.8 20127:04 qemu-system-x86
20657 libvirt+ 20 0 37.586g 0.013t 26076 R 93.8 1.8 20127:00 qemu-system-x86
20658 libvirt+ 20 0 37.586g 0.013t 26076 R 93.8 1.8 20126:57 qemu-system-x86
20659 libvirt+ 20 0 37.586g 0.013t 26076 R 93.8 1.8 20126:54 qemu-system-x86
20660 libvirt+ 20 0 37.586g 0.013t 26076 R 93.8 1.8 20126:58 qemu-system-x86
20661 libvirt+ 20 0 37.586g 0.013t 26076 R 93.8 1.8 20126:54 qemu-system-x86
20662 libvirt+ 20 0 37.586g 0.013t 26076 R 93.8 1.8 20127:37 qemu-system-x86
20663 libvirt+ 20 0 37.586g 0.013t 26076 R 93.8 1.8 20128:59 qemu-system-x86
20664 libvirt+ 20 0 37.586g 0.013t 26076 R 93.8 1.8 20128:48 qemu-system-x86
20665 libvirt+ 20 0 37.586g 0.013t 26076 R 93.8 1.8 20127:01 qemu-system-x86
20667 libvirt+ 20 0 37.586g 0.013t 26076 R 93.8 1.8 20128:41 qemu-system-x86
20668 libvirt+ 20 0 37.586g 0.013t 26076 R 93.8 1.8 20127:04 qemu-system-x86
20669 libvirt+ 20 0 37.586g 0.013t 26076 R 93.8 1.8 20006:54 qemu-system-x86
20597 libvirt+ 20 0 37.586g 0.013t 26076 S 0.0 1.8 4:38.56 qemu-system-x86
20647 libvirt+ 20 0 37.586g 0.013t 26076 S 0.0 1.8 0:00.03 qemu-system-x86
20671 libvirt+ 20 0 37.586g 0.013t 26076 S 0.0 1.8 0:01.83 qemu-system-x86
Наблюдение:
Версия ядра из HOST Compute Node: root @ host-node: / var / log / nova # uname -r 4.4.0-71-generic
Поэтому не совсем ясно, связана ли указанная проблема с Версия ядра Linux.
Детали узла GUEST: Ниже ссылки близки к сообщаемой проблеме, и будет ли какая-либо проблема в ее реализации в виртуальной среде, такой как облачная инфраструктура Openstack.
https://customerhelp.co.za/linux/ubuntu/fix-ubuntu-bug-soft-lockup-cpu-stuck-vmware-server.html
Примечание. Мы внедрили выше, и все еще проблема снова застряла.
Обходной путь 2 На основе некоторого более подробного анализа ниже версия ядра Ubuntu обнаружила проблемы с проблемой мягкой блокировки.
roothost-node:/var/log/nova# uname -r
4.4.0-71-generic
Обходное решение 2
1
задан Rajeshkumar
28 December 2017 в 20:16
поделиться