检测DEVICE硬件错误

mcelog 是Linux 系统上用来检查硬件错误，特别是内存和CPU错误的工具。
比如服务器隔一段时间莫名的重启一次，而message和syslog又检测不到有价值的信息。
通常发生MCE报错的原因有如下：
1、内存报错或者ECC问题
2、处理器过热
3、系统总线错误
4、CPU或者硬件缓存错误
一般来说当有错误提示时，需要优先注意内存问题，但由于现在内存控制器是集成在cpu里，所以有个别情况是由CPU问题引起的。
安装mcelog 

yum install mcelog -y
service mcelogd start

可以看到：

[root@103.96.77.11 /home]$ less /var/log/mcelog
 mcelog: Warning: MCE buffer is overflowed.
 Hardware event. This is not a software error.
 MCE 0
 CPU 31 BANK 11 
 MISC c900220002021c8c 
 TIME 1582975847 Sat Feb 29 03:30:47 2020
 MCG status:
 MCi status:
 Error overflow
 Corrected error
 MCi_MISC register valid
 MCA: MEMORY CONTROLLER RD_CHANNEL3_ERR
 Transaction: Memory read error
 MemCtrl: 
 STATUS c809fd4e00800093 MCGSTATUS 0
 MCGCAP 1000814 APICID 2f SOCKETID 1 
 CPUID Vendor Intel Family 6 Model 45
 Hardware event. This is not a software error.
 MCE 1
 CPU 30 BANK 11 
 MISC c900000222221c8c 
 TIME 1582975847 Sat Feb 29 03:30:47 2020
 MCG status:
 MCi status:
 Error overflow
 Corrected error
 MCi_MISC register valid
 MCA: MEMORY CONTROLLER RD_CHANNEL3_ERR
 Transaction: Memory read error
 MemCtrl: 
 STATUS c80316ce00800093 MCGSTATUS 0
 MCGCAP 1000814 APICID 2d SOCKETID 1 
 CPUID Vendor Intel Family 6 Model 45
 Hardware event. This is not a software error.
 MCE 2
 CPU 29 BANK 11 
 MISC c908002022001c8c 
 TIME 1582975847 Sat Feb 29 03:30:47 2020
 MCG status:
 MCi status:
 Error overflow
 Corrected error
 MCi_MISC register valid
 MCA: MEMORY CONTROLLER RD_CHANNEL3_ERR
 Transaction: Memory read error
 MemCtrl: 
 STATUS c800020e00800093 MCGSTATUS 0
 MCGCAP 1000814 APICID 2b SOCKETID 1 
 CPUID Vendor Intel Family 6 Model 45
 Hardware event. This is not a software error.
 MCE 3
 CPU 28 BANK 11 
 MISC c900022020201c8c 
 TIME 1582975847 Sat Feb 29 03:30:47 2020
 MCG status:
 MCi status:
 Error overflow
 Corrected error
 MCi_MISC register valid
 MCA: MEMORY CONTROLLER RD_CHANNEL3_ERR
 Transaction: Memory read error
 MemCtrl: 
 STATUS c80273ce00800093 MCGSTATUS 0
 MCGCAP 1000814 APICID 29 SOCKETID 1 
 CPUID Vendor Intel Family 6 Model 45
 Hardware event. This is not a software error.
 MCE 4
 CPU 27 BANK 11

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版权声明：本文为CSDN博主「陌小铠」的原创文章，遵循 CC 4.0 BY-SA 版权协议，转载请附上原文出处链接及本声明。
原文链接：https://blog.csdn.net/cy309173854/article/details/79030234