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Troubleshooting Oracle RAC node crash frequently on OEL 6.9 (Kernel panic)
有个客户的多套RAC节点总是频繁的重启， 故障并没有时间规律，环境Oracle RAC 11G r2 ON OEL 6.9 , 当然首先建议要排除一些硬件共性的配置，如是否电源电压不稳?机器所在区域空调是否差? 是否同一个宿主机上的VM? 硬件是否有报错？ 一线同学说都排查过也做了些调整并未解决。 下面分享一些处理建议。
DB ALERT LOG
# db1 alert log Wed Mar 16 05:00:17 2022 Archived Log entry 44608 added for thread 1 sequence 20901 ID 0x332f72cc dest 1: Wed Mar 16 09:00:11 2022 Thread 1 advanced to log sequence 20903 (LGWR switch) Current log# 6 seq# 20903 mem# 0: +DATA/anbob/onlinelog/group_6.275.1079106239 Current log# 6 seq# 20903 mem# 1: +FRA/anbob/onlinelog/group_6.11781.1079106243 Wed Mar 16 09:00:13 2022 Archived Log entry 44611 added for thread 1 sequence 20902 ID 0x332f72cc dest 1: Wed Mar 16 09:59:43 2022 Starting ORACLE instance (normal) ************************ Large Pages Information ******************* Per process system memlock (soft) limit = UNLIMITED Total Shared Global Region in Large Pages = 0 KB (0%) Large Pages used by this instance: 0 (0 KB) Large Pages unused system wide = 0 (0 KB) Large Pages configured system wide = 0 (0 KB) Large Page size = 2048 KB RECOMMENDATION: Total System Global Area size is 76 GB. For optimal performance, prior to the next instance restart: 1. Increase the number of unused large pages by at least 38657 (page size 2048 KB, total size 76 GB) system wide to get 100% of the System Global Area allocated with large pages ******************************************************************** LICENSE_MAX_SESSION = 0 LICENSE_SESSIONS_WARNING = 0 Initial number of CPU is 64 Number of processor cores in the system is 32 Number of processor sockets in the system is 4 # db2 Fri Feb 18 04:30:11 2022 Archived Log entry 3688 added for thread 1 sequence 2011 ID 0x4f4f7234 dest 1: Fri Feb 18 08:30:08 2022 Thread 1 advanced to log sequence 2013 (LGWR switch) Current log# 1 seq# 2013 mem# 0: +DATA/weejar/onlinelog/group_1.261.1073243451 Current log# 1 seq# 2013 mem# 1: +FRA/weejar/onlinelog/group_1.257.1073243453 Fri Feb 18 08:30:09 2022 Archived Log entry 3689 added for thread 1 sequence 2012 ID 0x4f4f7234 dest 1: Fri Feb 18 09:39:23 2022 Starting ORACLE instance (normal) ************************ Large Pages Information ******************* Per process system memlock (soft) limit = UNLIMITED Total Shared Global Region in Large Pages = 49 GB (98%) Large Pages used by this instance: 25280 (49 GB) Large Pages unused system wide = 320 (640 MB) Large Pages configured system wide = 25600 (50 GB)
Note:
找了2套库看了一下时间和重启前现象，数据库1是没有配置hugepage，不符合最佳实践，但不是问题原因，共同的现象是重启前DB 层都没有任何报错，日志切换不频繁说明DML事务并不多。
GI ALERT LOG
[ctssd(15405)]CRS-2412:The Cluster Time Synchronization Service detects that the local time is significantly different from the mean cluster time. Details in /u01/app/11.2.0/grid/log/anbob1/ctssd/octssd.log.
2022-02-11 10:43:45.541:
[ctssd(15405)]CRS-2412:The Cluster Time Synchronization Service detects that the local time is significantly different from the mean cluster time. Details in /u01/app/11.2.0/grid/log/anbob1/ctssd/octssd.log.
2022-02-11 11:13:45.941:
[ctssd(15405)]CRS-2412:The Cluster Time Synchronization Service detects that the local time is significantly different from the mean cluster time. Details in /u01/app/11.2.0/grid/log/anbob1/ctssd/octssd.log.
2022-02-11 11:25:32.172:
[ohasd(13944)]CRS-2112:The OLR service started on node anbob1.
2022-02-11 11:25:32.248:
[ohasd(13944)]CRS-1301:Oracle High Availability Service started on node anbob1.
...
[ctssd(15468)]CRS-2409:The clock on host anbob1 is not synchronous with the mean cluster time. No action has been taken as the Cluster Time Synchronization Service is running in observer mode.
2022-02-14 02:19:51.430:
[ctssd(15468)]CRS-2409:The clock on host anbob1 is not synchronous with the mean cluster time. No action has been taken as the Cluster Time Synchronization Service is running in observer mode.
2022-02-14 02:49:52.268:
[ctssd(15468)]CRS-2409:The clock on host anbob1 is not synchronous with the mean cluster time. No action has been taken as the Cluster Time Synchronization Service is running in observer mode.
2022-02-14 03:19:53.127:
[ctssd(15468)]CRS-2409:The clock on host anbob1 is not synchronous with the mean cluster time. No action has been taken as the Cluster Time Synchronization Service is running in observer mode.
2022-02-14 03:50:01.978:
[ctssd(15468)]CRS-2409:The clock on host anbob1 is not synchronous with the mean cluster time. No action has been taken as the Cluster Time Synchronization Service is running in observer mode.
2022-02-14 04:02:24.282:
[cssd(14459)]CRS-1719:Cluster Synchronization Service daemon (CSSD) clssnmvDiskPingMonitorThread not scheduled for 7940 msecs.
2022-02-14 04:02:24.282:
[cssd(14459)]CRS-1719:Cluster Synchronization Service daemon (CSSD) clssnmSendingThread not scheduled for 7740 msecs.
2022-02-14 04:02:25.283:
[cssd(14459)]CRS-1719:Cluster Synchronization Service daemon (CSSD) clssnmvWorkerThread not scheduled for 7900 msecs.
2022-02-14 04:02:25.283:
[cssd(14459)]CRS-1719:Cluster Synchronization Service daemon (CSSD) clssnmvDiskPingThread not scheduled for 7900 msecs.
2022-02-14 04:02:25.283:
[cssd(14459)]CRS-1719:Cluster Synchronization Service daemon (CSSD) clssnmvWorkerThread not scheduled for 7930 msecs.
2022-02-14 04:02:25.283:
[cssd(14459)]CRS-1719:Cluster Synchronization Service daemon (CSSD) clssnmvDiskPingThread not scheduled for 7930 msecs.
2022-02-14 04:02:25.283:
[cssd(14459)]CRS-1719:Cluster Synchronization Service daemon (CSSD) clssnmvWorkerThread not scheduled for 7960 msecs.
2022-02-14 04:02:26.284:
[cssd(14459)]CRS-1719:Cluster Synchronization Service daemon (CSSD) clssnmvDiskPingThread not scheduled for 8310 msecs.
2022-02-14 04:02:26.284:
[cssd(14459)]CRS-1719:Cluster Synchronization Service daemon (CSSD) clssnmvKillBlockThread not scheduled for 9210 msecs.
2022-02-14 04:02:31.870:
[cssd(14459)]CRS-1612:Network communication with node yngxsky2 (2) missing for 50% of timeout interval. Removal of this node from cluster in 14.620 seconds
2022-02-14 04:02:32.287:
[cssd(14459)]CRS-1719:Cluster Synchronization Service daemon (CSSD) clssnmvDiskPingMonitorThread not scheduled for 15940 msecs.
2022-02-14 04:02:32.287:
[cssd(14459)]CRS-1719:Cluster Synchronization Service daemon (CSSD) clssnmSendingThread not scheduled for 15740 msecs.
2022-02-14 04:02:33.287:
[cssd(14459)]CRS-1719:Cluster Synchronization Service daemon (CSSD) clssnmvWorkerThread not scheduled for 15900 msecs.
2022-02-14 04:02:33.287:
[cssd(14459)]CRS-1719:Cluster Synchronization Service daemon (CSSD) clssnmvDiskPingThread not scheduled for 15900 msecs.
2022-02-14 04:02:33.287:
[cssd(14459)]CRS-1719:Cluster Synchronization Service daemon (CSSD) clssnmvWorkerThread not scheduled for 15930 msecs.
2022-02-14 04:02:33.287:
[cssd(14459)]CRS-1719:Cluster Synchronization Service daemon (CSSD) clssnmvDiskPingThread not scheduled for 15930 msecs.
2022-02-14 04:02:33.288:
[cssd(14459)]CRS-1719:Cluster Synchronization Service daemon (CSSD) clssnmvWorkerThread not scheduled for 15960 msecs.
2022-02-14 04:02:34.288:
[cssd(14459)]CRS-1719:Cluster Synchronization Service daemon (CSSD) clssnmvDiskPingThread not scheduled for 16310 msecs.
2022-02-14 04:02:34.288:
[cssd(14459)]CRS-1719:Cluster Synchronization Service daemon (CSSD) clssnmvKillBlockThread not scheduled for 17210 msecs.
2022-02-14 04:02:39.289:
[cssd(14459)]CRS-1719:Cluster Synchronization Service daemon (CSSD) clssnmvKillBlockThread not scheduled for 8000 msecs.
2022-02-14 04:02:39.290:
[cssd(14459)]CRS-1719:Cluster Synchronization Service daemon (CSSD) clssnmvKillBlockThread not scheduled for 8000 msecs.
2022-02-14 04:02:39.872:
[cssd(14459)]CRS-1611:Network communication with node yngxsky2 (2) missing for 75% of timeout interval. Removal of this node from cluster in 6.620 seconds
2022-02-14 04:02:40.290:
[cssd(14459)]CRS-1719:Cluster Synchronization Service daemon (CSSD) clssnmvDiskPingMonitorThread not scheduled for 23940 msecs.
2022-02-14 04:02:40.290:
[cssd(14459)]CRS-1719:Cluster Synchronization Service daemon (CSSD) clssnmSendingThread not scheduled for 23750 msecs.
2022-02-14 04:02:41.291:
[cssd(14459)]CRS-1719:Cluster Synchronization Service daemon (CSSD) clssnmvWorkerThread not scheduled for 23910 msecs.
2022-02-14 04:02:41.291:
[cssd(14459)]CRS-1719:Cluster Synchronization Service daemon (CSSD) clssnmvDiskPingThread not scheduled for 23910 msecs.
2022-02-14 04:02:41.291:
[cssd(14459)]CRS-1719:Cluster Synchronization Service daemon (CSSD) clssnmvWorkerThread not scheduled for 23940 msecs.
2022-02-14 04:02:41.291:
[cssd(14459)]CRS-1719:Cluster Synchronization Service daemon (CSSD) clssnmvDiskPingThread not scheduled for 23940 msecs.
2022-02-14 04:02:41.291:
[cssd(14459)]CRS-1719:Cluster Synchronization Service daemon (CSSD) clssnmvWorkerThread not scheduled for 23970 msecs.
2022-02-14 04:02:42.291:
[cssd(14459)]CRS-1719:Cluster Synchronization Service daemon (CSSD) clssnmvDiskPingThread not scheduled for 24320 msecs.
2022-02-14 04:02:42.291:
[cssd(14459)]CRS-1719:Cluster Synchronization Service daemon (CSSD) clssnmvKillBlockThread not scheduled for 25220 msecs.
2022-02-14 04:08:16.481:
[ohasd(14069)]CRS-2112:The OLR service started on node anbob1.
2022-02-14 04:08:16.554:
[ohasd(14069)]CRS-1301:Oracle High Availability Service started on node anbob1.
2022-02-14 04:08:16.560:
[ohasd(14069)]CRS-8011:reboot advisory message from host: anbob1, component: cssmonit, with time stamp: L-2022-02-14-04:02:45.004
[ohasd(14069)]CRS-8013:reboot advisory message text: oracssdmonitor is rebooting this node due to network timeout (no network activity for 28450 milliseconds).
2022-02-14 04:08:16.567:
[ohasd(14069)]CRS-8017:location: /etc/oracle/lastgasp has 2 reboot advisory log files, 1 were announced and 0 errors occurred
...
[ctssd(80383)]CRS-2409:The clock on host anbob1 is not synchronous with the mean cluster time. No action has been taken as the Cluster Time Synchronization Service is running in observer mode.
2022-02-18 09:12:06.232:
[ctssd(80383)]CRS-2409:The clock on host anbob1 is not synchronous with the mean cluster time. No action has been taken as the Cluster Time Synchronization Service is running in observer mode.
2022-02-18 09:37:39.125:
[ohasd(13946)]CRS-2112:The OLR service started on node anbob1.
2022-02-18 09:37:39.185:
[ohasd(13946)]CRS-1301:Oracle High Availability Service started on node anbob1.
2022-02-18 09:37:39.205:
[ohasd(13946)]CRS-8017:location: /etc/oracle/lastgasp has 2 reboot advisory log files, 0 were announced and 0 errors occurred
2022-02-18 09:37:39.975:
[/u01/app/11.2.0/grid/bin/oraagent.bin(14066)]CRS-5011:Check of resource "+ASM" failed: details at "(:CLSN00006:)" in "/u01/app/11.2.0/grid/log/anbob1/agent/ohasd/oraagent_grid//oraagent_grid.log"
2022-02-18 09:37:43.200:
[/u01/app/11.2.0/grid/bin/orarootagent.bin(14070)]CRS-2302:Cannot get GPnP profile. Error CLSGPNP_NO_DAEMON (GPNPD daemon is not running).
2022-02-18 09:37:45.622:
[gpnpd(14231)]CRS-2328:GPNPD started on node anbob1.
Note:
抽了3次重启日志，有1次是重启前提示disk和network heartbeat心跳都丢失,可能是部分进程HANG或是存储和心跳网络同时故障，另外2次同样是无报错，直接日志断， 当然这种要么是断电也可能是OS hang本地文件系统都没响应。大多数也是GI层没有错误日志
OS messages log
# OS MESSAGE Feb 18 08:58:12 anbob1 sshd[15443]: error: session_signal_req: session signalling requires privilege separation Feb 18 08:58:15 anbob1 sshd[15443]: error: session_signal_req: session signalling requires privilege separation Feb 18 09:03:11 anbob1 sshd[15443]: error: session_signal_req: session signalling requires privilege separation Feb 18 09:08:01 anbob1 sshd[15443]: error: session_signal_req: session signalling requires privilege separation Feb 18 09:08:06 anbob1 sshd[15443]: error: session_signal_req: session signalling requires privilege separation Feb 18 09:08:11 anbob1 sshd[15443]: error: session_signal_req: session signalling requires privilege separation Feb 18 09:08:16 anbob1 sshd[15443]: error: session_signal_req: session signalling requires privilege separation Feb 18 09:28:07 anbob1 sshd[15443]: error: session_signal_req: session signalling requires privilege separation Feb 18 09:28:08 anbob1 sshd[15443]: error: session_signal_req: session signalling requires privilege separation Feb 18 09:28:12 anbob1 sshd[15443]: error: session_signal_req: session signalling requires privilege separation Feb 18 09:28:19 anbob1 sshd[15443]: error: session_signal_req: session signalling requires privilege separation Feb 18 09:30:16 anbob1 sshd[15443]: error: session_signal_req: session signalling requires privilege separation Feb 18 09:30:17 anbob1 sshd[15443]: error: session_signal_req: session signalling requires privilege separation <<<<<<<< Feb 18 09:37:06 anbob1 kernel: imklog 5.8.10, log source = /proc/kmsg started. Feb 18 09:37:06 anbob1 rsyslogd: [origin software="rsyslogd" swVersion="5.8.10" x-pid="10712" x-info="http://www.rsyslog.com"] start Feb 18 09:37:06 anbob1 kernel: [ 0.000000] Initializing cgroup subsys cpuset Feb 18 09:37:06 anbob1 kernel: [ 0.000000] Initializing cgroup subsys cpu Feb 18 09:37:06 anbob1 kernel: [ 0.000000] Initializing cgroup subsys cpuacct Feb 18 09:37:06 anbob1 kernel: [ 0.000000] Linux version 4.1.12-61.1.28.el6uek.x86_64 (mockbuild@x86-ol6-builder-06) (gcc version 4.4.7 20120313 (Red Hat 4.4.7-16) (GCC) ) #2 SMP Thu Feb 23 20:03:53 PST 2017 Feb 18 09:37:06 anbob1 kernel: [ 0.000000] Command line: ro root=/dev/mapper/vg-root rd_NO_LUKS KEYBOARDTYPE=pc KEYTABLE=us LANG=en_US.UTF-8 rd_LVM_LV=vg/sawp rd_NO_MD SYSFONT=latarcyrheb-sun16 crashkernel=auto rd_LVM_LV=vg/root rd_NO_DM quiet transparent_hugepage=never Feb 18 09:37:06 anbob1 kernel: [ 0.000000] e820: BIOS-provided physical RAM map: Feb 18 09:37:06 anbob1 kernel: [ 0.000000] BIOS-e820: [mem 0x0000000000000000-0x000000000009cbff] usable Feb 18 09:37:06 anbob1 kernel: [ 0.000000] BIOS-e820: [mem 0x000000000009cc00-0x000000000009ffff] reserved Feb 18 09:37:06 anbob1 kernel: [ 0.000000] BIOS-e820: [mem 0x00000000000f0000-0x00000000000fffff] reserved
Note:
最近一次重启前OS 一样没有致命性报错信息。
OS release
Oracle Linux Server release 6.9
OSW
# VMSTAT
zzz ***Fri Feb 18 09:29:23 CST 2022
procs -----------memory---------- ---swap-- -----io---- --system-- -----cpu-----
r b swpd free buff cache si so bi bo in cs us sy id wa st
4 0 0 140329936 545852 53463124 0 0 28 11 0 0 1 0 99 0 0
1 0 0 140321344 545852 53463336 0 0 937 1195 8208 16256 1 1 98 0 0
0 0 0 140323120 545852 53463520 0 0 889 432 7031 15666 0 1 99 0 0
zzz ***Fri Feb 18 09:29:54 CST 2022
procs -----------memory---------- ---swap-- -----io---- --system-- -----cpu-----
r b swpd free buff cache si so bi bo in cs us sy id wa st
1 0 0 140333120 545852 53463764 0 0 28 11 0 0 1 0 99 0 0
0 0 0 140324464 545852 53463768 0 0 941 208 8253 17067 1 1 98 0 0
1 0 0 140325232 545852 53463840 0 0 1966 197 7511 15787 0 1 99 0 0
zzz ***Fri Feb 18 09:30:24 CST 2022
procs -----------memory---------- ---swap-- -----io---- --system-- -----cpu-----
r b swpd free buff cache si so bi bo in cs us sy id wa st
8 0 0 140293360 545860 53464768 0 0 28 11 0 0 1 0 99 0 0
3 0 0 140281392 545860 53465060 0 0 2950 446 12225 18983 4 2 94 0 0
3 0 0 140279648 545860 53465244 0 0 1967 290 9693 16894 2 1 97 0 0
zzz ***Fri Feb 18 09:30:55 CST 2022
procs -----------memory---------- ---swap-- -----io---- --system-- -----cpu-----
r b swpd free buff cache si so bi bo in cs us sy id wa st
3 0 0 140313696 545860 53465420 0 0 28 11 0 0 1 0 99 0 0
1 0 0 140308144 545860 53465436 0 0 1998 1254 8888 16500 2 1 97 0 0
0 0 0 140307984 545860 53465820 0 0 1815 1161 7762 15977 1 1 98 0 0
zzz ***Fri Feb 18 09:31:25 CST 2022
procs -----------memory---------- ---swap-- -----io---- --system-- -----cpu-----
r b swpd free buff cache si so bi bo in cs us sy id wa st
6 0 0 140326928 545860 53466056 0 0 28 11 0 0 1 0 99 0 0
3 0 0 140318560 545860 53466284 0 0 1872 114 8055 16400 1 1 98 0 0
1 0 0 140317616 545860 53466468 0 0 1826 92 7514 15862 1 1 99 0 0
<<<< snapshot miss Linux OSWbb v7.3.3 anbob1
SNAP_INTERVAL 30
CPU_COUNT 64
OSWBB_ARCHIVE_DEST /u01/app/grid/tfa/repository/suptools/anbob1/oswbb/grid/archive
zzz ***Fri Feb 18 09:38:15 CST 2022
procs -----------memory---------- ---swap-- -----io---- --system-- -----cpu-----
r b swpd free buff cache si so bi bo in cs us sy id wa st
5 1 0 209582320 59836 381792 0 0 62 4 47 77 1 1 98 0 0
1 0 0 209570784 59840 382068 0 0 59 17 1563 4010 0 0 99 0 0
2 0 0 209571616 59840 382024 0 0 55 2 847 2878 0 0 100 0 0
# mpstat
09:31:26 CPU %usr %nice %sys %iowait %irq %soft %steal %guest %idle
09:31:27 all 0.57 0.00 0.77 0.05 0.00 0.00 0.00 0.00 98.62
09:31:27 0 1.02 0.00 1.02 0.00 0.00 1.02 0.00 0.00 96.94
09:31:27 1 2.02 0.00 1.01 0.00 0.00 0.00 0.00 0.00 96.97
09:31:27 2 1.01 0.00 2.02 0.00 0.00 0.00 0.00 0.00 96.97
09:31:27 3 2.04 0.00 1.02 0.00 0.00 0.00 0.00 0.00 96.94
09:31:27 4 2.02 0.00 0.00 0.00 0.00 0.00 0.00 0.00 97.98
09:31:27 5 1.01 0.00 1.01 0.00 0.00 0.00 0.00 0.00 97.98
09:31:27 6 3.03 0.00 0.00 0.00 0.00 0.00 0.00 0.00 96.97
09:31:27 7 1.01 0.00 0.00 0.00 0.00 0.00 0.00 0.00 98.99
09:31:27 8 1.01 0.00 0.00 0.00 0.00 0.00 0.00 0.00 98.99
09:31:27 9 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 100.00
09:31:27 10 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 100.00
09:31:27 11 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 100.00
09:31:27 12 1.01 0.00 1.01 0.00 0.00 0.00 0.00 0.00 97.98
09:31:27 13 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 100.00
09:31:27 14 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 100.00
09:31:27 15 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 100.00
09:31:27 16 2.08 0.00 12.50 0.00 0.00 0.00 0.00 0.00 85.42
09:31:27 17 0.00 0.00 1.02 0.00 0.00 0.00 0.00 0.00 98.98
09:31:27 18 1.03 0.00 1.03 0.00 0.00 0.00 0.00 0.00 97.94
09:31:27 19 1.02 0.00 0.00 0.00 0.00 0.00 0.00 0.00 98.98
09:31:27 20 0.00 0.00 1.02 0.00 0.00 0.00 0.00 0.00 98.98
09:31:27 21 1.00 0.00 1.00 2.00 0.00 0.00 0.00 0.00 96.00
09:31:27 22 1.01 0.00 0.00 1.01 0.00 0.00 0.00 0.00 97.98
09:31:27 23 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 100.00
09:31:27 24 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 100.00
09:31:27 25 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 100.00
09:31:27 26 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 100.00
09:31:27 27 0.98 0.00 0.98 0.00 0.00 0.00 0.00 0.00 98.04
09:31:27 28 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 100.00
09:31:27 29 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 100.00
09:31:27 30 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 100.00
09:31:27 31 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 100.00
09:31:27 32 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 100.00
09:31:27 33 0.00 0.00 1.03 0.00 0.00 0.00 0.00 0.00 98.97
09:31:27 34 6.00 0.00 2.00 0.00 0.00 0.00 0.00 0.00 92.00
09:31:27 35 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 100.00
09:31:27 36 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 100.00
09:31:27 37 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 100.00
09:31:27 38 0.00 0.00 0.99 0.00 0.00 0.00 0.00 0.00 99.01
09:31:27 39 0.00 0.00 0.99 0.00 0.00 0.00 0.00 0.00 99.01
09:31:27 40 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 100.00
09:31:27 41 0.00 0.00 2.00 0.00 0.00 0.00 0.00 0.00 98.00
09:31:27 42 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 100.00
09:31:27 43 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 100.00
09:31:27 44 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 100.00
09:31:27 45 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 100.00
09:31:27 46 0.00 0.00 0.99 0.00 0.00 0.00 0.00 0.00 99.01
09:31:27 47 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 100.00
09:31:27 48 2.04 0.00 7.14 0.00 0.00 0.00 0.00 0.00 90.82
09:31:27 49 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 100.00
09:31:27 50 0.00 0.00 3.00 0.00 0.00 0.00 0.00 0.00 97.00
09:31:27 51 0.00 0.00 1.00 0.00 0.00 0.00 0.00 0.00 99.00
09:31:27 52 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 100.00
09:31:27 53 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 100.00
09:31:27 54 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 100.00
09:31:27 55 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 100.00
09:31:27 56 0.00 0.00 1.01 0.00 0.00 0.00 0.00 0.00 98.99
09:31:27 57 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 100.00
09:31:27 58 4.00 0.00 5.00 0.00 0.00 0.00 0.00 0.00 91.00
09:31:27 59 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 100.00
09:31:27 60 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 100.00
09:31:27 61 0.99 0.00 0.00 0.00 0.00 0.00 0.00 0.00 99.01
09:31:27 62 0.00 0.00 0.99 0.00 0.00 0.00 0.00 0.00 99.01
09:31:27 63 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 100.00
Average: CPU %usr %nice %sys %iowait %irq %soft %steal %guest %idle
Average: all 0.78 0.00 0.88 0.05 0.00 0.01 0.00 0.00 98.29
Average: 0 3.09 0.00 0.52 0.00 0.00 0.52 0.00 0.00 95.88
Average: 1 1.52 0.00 1.02 0.00 0.00 0.00 0.00 0.00 97.46
Average: 2 1.01 0.00 1.52 0.00 0.00 0.00 0.00 0.00 97.47
Average: 3 2.02 0.00 0.51 0.00 0.00 0.00 0.00 0.00 97.47
Average: 4 3.05 0.00 0.51 0.00 0.00 0.00 0.00 0.00 96.45
Average: 5 1.02 0.00 0.51 0.00 0.00 0.00 0.00 0.00 98.48
Average: 6 1.52 0.00 0.51 0.00 0.00 0.00 0.00 0.00 97.98
Average: 7 1.01 0.00 0.00 0.00 0.00 0.00 0.00 0.00 98.99
Average: 8 0.50 0.00 0.00 0.00 0.00 0.00 0.00 0.00 99.50
Average: 9 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 100.00
Average: 10 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 100.00
Average: 11 0.50 0.00 0.50 0.00 0.00 0.00 0.00 0.00 98.99
Average: 12 1.01 0.00 0.50 0.00 0.00 0.00 0.00 0.00 98.49
Average: 13 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 100.00
Average: 14 0.50 0.00 1.01 0.00 0.00 0.00 0.00 0.00 98.49
Average: 15 0.50 0.00 0.00 0.00 0.00 0.00 0.00 0.00 99.50
Average: 16 2.05 0.00 6.67 0.00 0.00 0.00 0.00 0.00 91.28
Average: 17 0.52 0.00 1.03 0.00 0.00 0.00 0.00 0.00 98.45
Average: 18 7.77 0.00 2.07 0.00 0.00 0.00 0.00 0.00 90.16
Average: 19 1.02 0.00 0.51 0.00 0.00 0.00 0.00 0.00 98.48
Average: 20 0.51 0.00 0.51 0.51 0.00 0.00 0.00 0.00 98.47
Average: 21 1.00 0.00 1.00 1.50 0.00 0.00 0.00 0.00 96.50
Average: 22 0.51 0.00 0.00 1.02 0.00 0.00 0.00 0.00 98.47
Average: 23 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 100.00
Average: 24 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 100.00
Average: 25 0.50 0.00 0.50 0.00 0.00 0.00 0.00 0.00 99.00
Average: 26 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 100.00
Average: 27 0.50 0.00 0.50 0.00 0.00 0.00 0.00 0.00 99.00
Average: 28 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 100.00
Average: 29 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 100.00
Average: 30 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 100.00
Average: 31 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 100.00
Average: 32 2.50 0.00 0.50 0.00 0.00 0.00 0.00 0.00 97.00
Average: 33 0.00 0.00 1.03 0.00 0.00 0.00 0.00 0.00 98.97
Average: 34 3.50 0.00 1.50 0.00 0.00 0.00 0.00 0.00 95.00
Average: 35 3.02 0.00 5.53 0.00 0.00 0.00 0.00 0.00 91.46
Average: 36 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 100.00
Average: 37 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 100.00
Average: 38 0.00 0.00 0.50 0.00 0.00 0.00 0.00 0.00 99.50
Average: 39 0.00 0.00 0.50 0.00 0.00 0.00 0.00 0.00 99.50
Average: 40 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 100.00
Average: 41 0.50 0.00 1.00 0.00 0.00 0.00 0.00 0.00 98.50
Average: 42 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 100.00
Average: 43 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 100.00
Average: 44 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 100.00
Average: 45 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 100.00
Average: 46 0.00 0.00 0.50 0.00 0.00 0.00 0.00 0.00 99.50
Average: 47 0.00 0.00 0.50 0.00 0.00 0.00 0.00 0.00 99.50
Average: 48 3.63 0.00 12.44 0.00 0.00 0.00 0.00 0.00 83.94
Average: 49 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 100.00
Average: 50 0.00 0.00 1.50 0.00 0.00 0.00 0.00 0.00 98.50
Average: 51 0.00 0.00 0.50 0.00 0.00 0.00 0.00 0.00 99.50
Average: 52 0.00 0.00 0.50 0.00 0.00 0.00 0.00 0.00 99.50
Average: 53 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 100.00
Average: 54 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 100.00
Average: 55 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 100.00
Average: 56 0.00 0.00 1.01 0.00 0.00 0.00 0.00 0.00 98.99
Average: 57 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 100.00
Average: 58 5.00 0.00 7.50 0.00 0.00 0.00 0.00 0.00 87.50
Average: 59 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 100.00
Average: 60 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 100.00
Average: 61 0.50 0.00 0.00 0.00 0.00 0.00 0.00 0.00 99.50
Average: 62 0.00 0.00 0.50 0.00 0.00 0.00 0.00 0.00 99.50
Average: 63 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 100.00
<<<<<<<< snapshot miss Linux OSWbb v7.3.3
zzz ***Fri Feb 18 09:38:15 CST 2022
Linux 4.1.12-61.1.28.el6uek.x86_64 (anbob1) 02/18/22 _x86_64_ (64 CPU)
NOTE:
从09:31 开始OS 未能取到VMSTAT 说明OS 已HANG. 并且系统负载极低。
关于IPC问题 网络信息常见的内核参数
net.ipv4.ipfrag_high_thresh = 8388608 net.ipv4.ipfrag_low_thresh = 6291456 net.ipv4.ipfrag_max_dist = 64 net.ipv4.ipfrag_secret_interval = 0 net.ipv4.ipfrag_time = 60
Note:
可见是调整过比默认增加了1倍，但是还是再建议增加1倍做为最佳实践，但当前的系统负载，这问题也不大。
对于OS的突然hang像WINDOWS的蓝屏，LINUX的panic ，通常要看OS CRASH时的转储信息，配置了panic或KDUMP会把问题时的内存信息存下来，如生成OS Debug的vmcore或core文件，可以使用crash进一步分析。
找了了最近3次的vmcore_demsg信息
[2379924.043290] e1000e: eth1 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: None [2510402.232207] sched: RT throttling activated [2590470.081517] Kernel panic - not syncing: Watchdog detected hard LOCKUP on cpu 41 [2590470.082069] CPU: 41 PID: 0 Comm: swapper/41 Tainted: G OE 4.1.12-61.1.28.el6uek.x86_64 #2 [2590470.082445] Hardware name: HP ProLiant DL580 G7, BIOS P65 10/01/2013 [2590470.082545] 0000000000000000 ffff881fffa46a10 ffffffff816c6e40 ffffffff8198f0d8 [2590470.082887] 0000000000000000 ffff881fffa46a90 ffffffff816c6b9c 0000000000000010 [2590470.083237] ffff881fffa46aa0 ffff881fffa46a40 0000000000000000 0000000000000000 [2590470.083363] Call Trace: [2590470.083761] <NMI> [<ffffffff816c6e40>] dump_stack+0x63/0x83 [2590470.084074] [<ffffffff816c6b9c>] panic+0xc1/0x210 [2590470.084366] [<ffffffff81135abe>] watchdog_overflow_callback+0xae/0xb0 [2590470.085259] [<ffffffff8117b337>] __perf_event_overflow+0x97/0x230 [2590470.085828] [<ffffffff8102e600>] ? x86_perf_event_set_period+0xf0/0x180 [2590470.086205] [<ffffffff8117bc14>] perf_event_overflow+0x14/0x20 [2590470.086635] [<ffffffff81037924>] intel_pmu_handle_irq+0x224/0x4c0 [2590470.086872] [<ffffffff81020a85>] ? native_sched_clock+0x35/0xc0 [2590470.087266] [<ffffffff810209e9>] ? sched_clock+0x9/0x10 [2590470.087500] [<ffffffff8102dc94>] perf_event_nmi_handler+0x34/0x60 [2590470.087740] [<ffffffff8101afe7>] nmi_handle+0x87/0x150 [2590470.088039] [<ffffffff81056d50>] ? hw_nmi_get_sample_period+0x20/0x20 [2590470.088142] [<ffffffff8101b2ce>] default_do_nmi+0x5e/0x130 [2590470.088389] [<ffffffff8101b495>] do_nmi+0xf5/0x170 [2590470.088793] [<ffffffff816cdec5>] end_repeat_nmi+0x1a/0x1e [2590470.089048] [<ffffffff8139e5a4>] ? intel_idle+0xb4/0x120 [2590470.089338] [<ffffffff8139e5a4>] ? intel_idle+0xb4/0x120 [2590470.089792] [<ffffffff8139e5a4>] ? intel_idle+0xb4/0x120 [2590470.089875] <<EOE>> [<ffffffff8159bd1d>] cpuidle_enter_state+0x8d/0x230 [2590470.089998] [<ffffffff8159bed7>] cpuidle_enter+0x17/0x20 [2590470.090090] [<ffffffff810c8ed4>] cpuidle_idle_call+0xe4/0x1e0 [2590470.090393] [<ffffffff810c91c5>] cpu_idle_loop+0x1f5/0x220 [2590470.090481] [<ffffffff810c920b>] ? cpu_startup_entry+0x1b/0x70 [2590470.090574] [<ffffffff810c924f>] cpu_startup_entry+0x5f/0x70 [2590470.090668] [<ffffffff81052d3b>] start_secondary+0xbb/0xc0 ---- 75.587647] UltraPath started successfully. [ 167.110162] perf interrupt took too long (5797 > 5000), lowering kernel.perf_event_max_sample_rate to 25000 [ 193.801534] hugetlbfs: oracle (17463): Using mlock ulimits for SHM_HUGETLB is deprecated [ 237.641653] perf interrupt took too long (10426 > 9615), lowering kernel.perf_event_max_sample_rate to 13000 [ 406.494152] nr_pdflush_threads exported in /proc is scheduled for removal [ 416.460360] hrtimer: interrupt took 2147246 ns [ 788.112662] perf interrupt took too long (21138 > 17857), lowering kernel.perf_event_max_sample_rate to 7000 [25467.877127] perf interrupt took too long (36178 > 31250), lowering kernel.perf_event_max_sample_rate to 4000 [928925.575289] ------------[ cut here ]------------ [928925.575676] WARNING: CPU: 1 PID: 0 at net/sched/sch_generic.c:303 dev_watchdog+0x240/0x250() [928925.575684] NETDEV WATCHDOG: eth1 (e1000e): transmit queue 0 timed out [928925.575686] Modules linked in: bonding ib_ipoib rdma_ucm ib_ucm ib_uverbs ib_umad rdma_cm ib_cm iw_cm ib_sa ib_mad ib_core ib_addr ipv6 ipmi_ssif ipmi_si ipmi_msghandler iTCO_wdt iTCO_vendor_support pcspkr serio_raw lpc_ich mfd_core hpilo hpwdt i7core_edac edac_core igb dca tg3 e1000e ptp pps_core pcc_cpufreq acpi_cpufreq nxupext_a(OE) nxup(OE) sg ext4 jbd2 mbcache sr_mod cdrom sd_mod pata_acpi ata_generic ata_piix hpsa scsi_transport_sas lpfc scsi_transport_fc wmi radeon ttm drm_kms_helper drm i2c_algo_bit i2c_core dm_mirror dm_region_hash dm_log dm_mod [928925.575779] CPU: 1 PID: 0 Comm: swapper/1 Tainted: G OE 4.1.12-61.1.28.el6uek.x86_64 #2 [928925.575783] Hardware name: HP ProLiant DL580 G7, BIOS P65 10/01/2013 [928925.575786] 0000000000000000 ffff880fff843d38 ffffffff816c6e40 ffff880fff843d88 [928925.575801] 000000000000012f ffff880fff843d78 ffffffff810845e5 ffff880fff850b80 [928925.575807] ffff880ff3600000 ffff880ff36003e0 ffff880ff770b200 0000000000000001 [928925.575812] Call Trace: [928925.575815] <IRQ> [<ffffffff816c6e40>] dump_stack+0x63/0x83 [928925.575836] [<ffffffff810845e5>] warn_slowpath_common+0x95/0xe0 [928925.575841] [<ffffffff810846e6>] warn_slowpath_fmt+0x46/0x70 [928925.575869] [<ffffffffa0a64f60>] ? opt.61719+0x40/0xffffffffffff71d2 [e1000e] [928925.575882] [<ffffffff81615d60>] dev_watchdog+0x240/0x250 [928925.575892] [<ffffffff8109df80>] ? __queue_work+0x3f0/0x3f0 [928925.575897] [<ffffffff81615b20>] ? __netdev_watchdog_up+0x80/0x80 [928925.575903] [<ffffffff810ecfa7>] call_timer_fn+0x47/0x160 [928925.575907] [<ffffffff810ed2c0>] run_timer_softirq+0x200/0x380 [928925.575912] [<ffffffff81615b20>] ? __netdev_watchdog_up+0x80/0x80 [928925.575919] [<ffffffff8108879a>] __do_softirq+0x10a/0x350 [928925.575925] [<ffffffff81088b55>] irq_exit+0x125/0x130 [928925.575931] [<ffffffff8105b964>] ? native_apic_msr_eoi_write+0x14/0x20 [928925.575937] [<ffffffff816ceab6>] smp_apic_timer_interrupt+0x46/0x60 [928925.575942] [<ffffffff816cc9fe>] apic_timer_interrupt+0x6e/0x80 [928925.575945] <EOI> [<ffffffff8159bd52>] ? cpuidle_enter_state+0xc2/0x230 [928925.575958] [<ffffffff8159bd25>] ? cpuidle_enter_state+0x95/0x230 [928925.575964] [<ffffffff8159bed7>] cpuidle_enter+0x17/0x20 [928925.575981] [<ffffffff810c8ed4>] cpuidle_idle_call+0xe4/0x1e0 [928925.575991] [<ffffffff810c91c5>] cpu_idle_loop+0x1f5/0x220 [928925.576001] [<ffffffff810c920b>] ? cpu_startup_entry+0x1b/0x70 [928925.576009] [<ffffffff810c924f>] cpu_startup_entry+0x5f/0x70 [928925.576014] [<ffffffff81052d3b>] start_secondary+0xbb/0xc0 [928925.576018] ---[ end trace eca7ca9111afe041 ]--- [928925.576399] e1000e 0000:0e:00.1 eth1: Reset adapter unexpectedly [928928.988375] e1000e: eth1 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: None [1177095.290528] RPC: Registered named UNIX socket transport module. [1177095.290533] RPC: Registered udp transport module. [1177095.290535] RPC: Registered tcp transport module. [1177095.290536] RPC: Registered tcp NFSv4.1 backchannel transport module. [1177095.330292] FS-Cache: Loaded [1177095.352991] FS-Cache: Netfs 'nfs' registered for caching [1177095.354053] NFS: server address does not match proto= option [2454185.729236] Kernel panic - not syncing: Watchdog detected hard LOCKUP on cpu 54 [2454185.730340] CPU: 54 PID: 0 Comm: swapper/54 Tainted: G W OE 4.1.12-61.1.28.el6uek.x86_64 #2 [2454185.730482] Hardware name: HP ProLiant DL580 G7, BIOS P65 10/01/2013 [2454185.730579] 0000000000000000 ffff882fffb86a10 ffffffff816c6e40 ffffffff8198f0d8 [2454185.730706] 0000000000000000 ffff882fffb86a90 ffffffff816c6b9c 0000000000000010 [2454185.731099] ffff882fffb86aa0 ffff882fffb86a40 0000000000000000 0000000000000000 [2454185.731227] Call Trace: [2454185.731266] <NMI> [<ffffffff816c6e40>] dump_stack+0x63/0x83 [2454185.731368] [<ffffffff816c6b9c>] panic+0xc1/0x210 [2454185.731716] [<ffffffff81135abe>] watchdog_overflow_callback+0xae/0xb0 [2454185.731819] [<ffffffff8117b337>] __perf_event_overflow+0x97/0x230 [2454185.731920] [<ffffffff8102e600>] ? x86_perf_event_set_period+0xf0/0x180 [2454185.732021] [<ffffffff8117bc14>] perf_event_overflow+0x14/0x20 [2454185.732115] [<ffffffff81037924>] intel_pmu_handle_irq+0x224/0x4c0 [2454185.732216] [<ffffffff81020a85>] ? native_sched_clock+0x35/0xc0 [2454185.732570] [<ffffffff810209e9>] ? sched_clock+0x9/0x10 [2454185.732653] [<ffffffff8102dc94>] perf_event_nmi_handler+0x34/0x60 [2454185.732745] [<ffffffff8101afe7>] nmi_handle+0x87/0x150 [2454185.732828] [<ffffffff81056d50>] ? hw_nmi_get_sample_period+0x20/0x20 [2454185.732925] [<ffffffff8101b2ce>] default_do_nmi+0x5e/0x130 [2454185.733006] [<ffffffff8101b495>] do_nmi+0xf5/0x170 [2454185.733081] [<ffffffff816cdec5>] end_repeat_nmi+0x1a/0x1e [2454185.733166] [<ffffffff8139e5a4>] ? intel_idle+0xb4/0x120 [2454185.733246] [<ffffffff8139e5a4>] ? intel_idle+0xb4/0x120 [2454185.733325] [<ffffffff8139e5a4>] ? intel_idle+0xb4/0x120 [2454185.733404] <<EOE>> [<ffffffff8159bd1d>] cpuidle_enter_state+0x8d/0x230 [2454185.733516] [<ffffffff8159bed7>] cpuidle_enter+0x17/0x20 [2454185.733600] [<ffffffff810c8ed4>] cpuidle_idle_call+0xe4/0x1e0 [2454185.733687] [<ffffffff810c91c5>] cpu_idle_loop+0x1f5/0x220 [2454185.733768] [<ffffffff810c920b>] ? cpu_startup_entry+0x1b/0x70 [2454185.734098] [<ffffffff810c924f>] cpu_startup_entry+0x5f/0x70 [2454185.734186] [<ffffffff81052d3b>] start_secondary+0xbb/0xc0 -------------------- [ 75.291118] UltraPath started successfully. [ 75.929766] RPC: Registered named UNIX socket transport module. [ 75.929773] RPC: Registered udp transport module. [ 75.929776] RPC: Registered tcp transport module. [ 75.929778] RPC: Registered tcp NFSv4.1 backchannel transport module. [ 91.447029] FS-Cache: Loaded [ 91.460755] FS-Cache: Netfs 'nfs' registered for caching [ 205.842823] hugetlbfs: oracle (17664): Using mlock ulimits for SHM_HUGETLB is deprecated [ 210.899295] perf interrupt took too long (5015 > 5000), lowering kernel.perf_event_max_sample_rate to 25000 [ 245.017290] perf interrupt took too long (11059 > 9615), lowering kernel.perf_event_max_sample_rate to 13000 [ 422.138190] nr_pdflush_threads exported in /proc is scheduled for removal [ 686.266909] perf interrupt took too long (20079 > 17857), lowering kernel.perf_event_max_sample_rate to 7000 [12199.986042] perf interrupt took too long (36188 > 31250), lowering kernel.perf_event_max_sample_rate to 4000 [244199.960717] Kernel panic - not syncing: Watchdog detected hard LOCKUP on cpu 19 [244199.960858] CPU: 19 PID: 0 Comm: swapper/19 Tainted: G OE 4.1.12-61.1.28.el6uek.x86_64 #2 [244199.961005] Hardware name: HP ProLiant DL580 G7, BIOS P65 10/01/2013 [244199.961107] 0000000000000000 ffff882fff8c6a10 ffffffff816c6e40 ffffffff8198f0d8 [244199.961240] 0000000000000000 ffff882fff8c6a90 ffffffff816c6b9c 0000000000000010 [244199.961371] ffff882fff8c6aa0 ffff882fff8c6a40 0000000000000000 0000000000000000 [244199.961503] Call Trace: [244199.961546] <NMI> [<ffffffff816c6e40>] dump_stack+0x63/0x83 [244199.961723] [<ffffffff816c6b9c>] panic+0xc1/0x210 [244199.961807] [<ffffffff81135abe>] watchdog_overflow_callback+0xae/0xb0 [244199.961915] [<ffffffff8117b337>] __perf_event_overflow+0x97/0x230 [244199.962020] [<ffffffff8102e600>] ? x86_perf_event_set_period+0xf0/0x180 [244199.962127] [<ffffffff8117bc14>] perf_event_overflow+0x14/0x20 [244199.962229] [<ffffffff81037924>] intel_pmu_handle_irq+0x224/0x4c0 [244199.962337] [<ffffffff81020a85>] ? native_sched_clock+0x35/0xc0 [244199.962430] [<ffffffff810209e9>] ? sched_clock+0x9/0x10 [244199.962513] [<ffffffff8102dc94>] perf_event_nmi_handler+0x34/0x60 [244199.962607] [<ffffffff8101afe7>] nmi_handle+0x87/0x150 [244199.962692] [<ffffffff81056d50>] ? hw_nmi_get_sample_period+0x20/0x20 [244199.962792] [<ffffffff8101b2ce>] default_do_nmi+0x5e/0x130 [244199.962876] [<ffffffff8101b495>] do_nmi+0xf5/0x170 [244199.962954] [<ffffffff816cdec5>] end_repeat_nmi+0x1a/0x1e [244199.963041] [<ffffffff8139e5a4>] ? intel_idle+0xb4/0x120 [244199.963123] [<ffffffff8139e5a4>] ? intel_idle+0xb4/0x120 [244199.963205] [<ffffffff8139e5a4>] ? intel_idle+0xb4/0x120 [244199.963287] <<EOE>> [<ffffffff8159bd1d>] cpuidle_enter_state+0x8d/0x230 [244199.963404] [<ffffffff8159bed7>] cpuidle_enter+0x17/0x20 [244199.963490] [<ffffffff810c8ed4>] cpuidle_idle_call+0xe4/0x1e0 [244199.963580] [<ffffffff810c91c5>] cpu_idle_loop+0x1f5/0x220 [244199.963664] [<ffffffff810c920b>] ? cpu_startup_entry+0x1b/0x70 [244199.963756] [<ffffffff810c924f>] cpu_startup_entry+0x5f/0x70 [244199.963846] [<ffffffff81052d3b>] start_secondary+0xbb/0xc0
Note:
可见3次的调用基本一样， 判断是OS 某个kernel bug导致的异常重启在Watchdog detected hard LOCKUP“硬锁定时的恐慌” 后(简单理解为硬死锁)。
关于调用的后半部分是
watchdog_timer_fn
这是一个高分辨率定时器功能，它在中断上下文中执行时定期更新特定于 CPU 的中断计数器。
watchdog_overflow_callback
此函数从不可屏蔽中断 (NMI) 上下文中调用。如果 CPU 繁忙，此函数会定期执行，并检查watchdog_timer_fn在过去的时间间隔内是否增加了特定于 CPU 的计数器。如果计数器没有增加，watchdog_overflow_callback则假定 CPU 在中断被禁用的内核代码部分中“锁定”，除非通过nmi_watchdog=nopanic内核命令行上的参数显式禁用“硬锁定时的恐慌”，否则会发生恐慌panic.
watchdog_timer_fn和的区间watchdog_overflow_callback是从/proc/sys/kernel/watchdog_thresh参数导出的。该参数的值默认为 10。
调用的前半部分是
cpu_idel cpu_idel_loop, cpu_startup
猜测是内核中的一种CPU调度器，如把CPU变会IDEL或从唤醒，达到CPU节省功耗性能目的。于与相关配置的如BIOS中CPU是否是最大性能模式还是自动节能模式和CPUspeed service.
查看当时的CPU 主频(cpuinfo)
egrep "processor|cpu MHz" cpuinfo processor : 0 cpu MHz : 1149.520 processor : 1 cpu MHz : 1684.020 processor : 2 cpu MHz : 1074.690 processor : 3 cpu MHz : 1106.760 processor : 4 cpu MHz : 1074.690 processor : 5 cpu MHz : 1074.690 processor : 6 cpu MHz : 1170.900 processor : 7 cpu MHz : 1170.900 processor : 8 cpu MHz : 1758.850 processor : 9 cpu MHz : 2133.000 processor : 10 cpu MHz : 1416.770 processor : 11 cpu MHz : 1085.380 processor : 12 cpu MHz : 1149.520 processor : 13 cpu MHz : 1085.380 processor : 14 cpu MHz : 1064.000 processor : 15 cpu MHz : 1085.380 processor : 16 cpu MHz : 1074.690 processor : 17 cpu MHz : 1106.760 processor : 18 cpu MHz : 1117.450 processor : 19 cpu MHz : 1064.000 processor : 20 cpu MHz : 1085.380 processor : 21 cpu MHz : 1074.690 processor : 22 cpu MHz : 1074.690 processor : 23 cpu MHz : 1085.380 processor : 24 cpu MHz : 1064.000 processor : 25 cpu MHz : 1064.000 processor : 26 cpu MHz : 1085.380 processor : 27 cpu MHz : 1074.690 processor : 28 cpu MHz : 1074.690 processor : 29 cpu MHz : 1064.000 processor : 30 cpu MHz : 1374.010 processor : 31 cpu MHz : 1074.690 processor : 32 cpu MHz : 1523.670 processor : 33 cpu MHz : 1138.830 processor : 34 cpu MHz : 1074.690 processor : 35 cpu MHz : 1064.000 processor : 36 cpu MHz : 1064.000 processor : 37 cpu MHz : 1064.000 processor : 38 cpu MHz : 1064.000 processor : 39 cpu MHz : 1085.380 processor : 40 cpu MHz : 1074.690 processor : 41 cpu MHz : 1064.000 processor : 42 cpu MHz : 1064.000 processor : 43 cpu MHz : 1064.000 processor : 44 cpu MHz : 1064.000 processor : 45 cpu MHz : 1064.000 processor : 46 cpu MHz : 1064.000 processor : 47 cpu MHz : 1064.000 processor : 48 cpu MHz : 2133.000 processor : 49 cpu MHz : 2133.000 processor : 50 cpu MHz : 2131.024 processor : 51 cpu MHz : 1064.000 processor : 52 cpu MHz : 2133.000 processor : 53 cpu MHz : 2133.000 processor : 54 cpu MHz : 1064.000 processor : 55 cpu MHz : 1064.000 processor : 56 cpu MHz : 2133.000 processor : 57 cpu MHz : 1074.690 processor : 58 cpu MHz : 1064.000 processor : 59 cpu MHz : 1064.000 processor : 60 cpu MHz : 1074.690 processor : 61 cpu MHz : 1064.000 processor : 62 cpu MHz : 1064.000 processor : 63 cpu MHz : 2133.000
NOTE:
当前存在CPU降频现象， CPU主频都不一致，应该是节能模式。
Red Hat Enterprise Linux 6 带来了许多省电功能。在 RHEL 6 中，intel_idle 驱动程序可以覆盖 BIOS 默认值，并且必须通过“intel_idle.max_cstate=0”禁用，以确保在主机上完全禁用更高的 C 状态。
方案建议
对于其它类型数据库环境#2 #3通常也都是建议调整。
1，/proc/sys/kernel/watchdog_thresh 从10 到20
2， BIOS 选择Performance Per Watt Optimized(DAPC)模式，发挥CPU最大性能
3， 关闭C1E和C States等选项，检查当前 cat /proc/cmdline|grep max_cstate
intel_idle.max_cstate=0 processor.max_cstate=0 idle=poll intel_pstate=disable
也可以使用tuned profile 切到throughput-performance 模式.
— vm环境不要配置idle=poll
— over —
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