Dan Langille wrote:
I am encountering a situation similar to one reported by Andrew Heybey
at http://docs.freebsd.org/cgi/mid.cgi?6E83197B-9DD5-4C7E-846D-AD176C25464D
This morning I found this in my /var/log/messages:
Aug 11 01:59:48 kraken kernel: MCA: Bank 4, Status 0x94614c62001c011b
Aug 11 01:59:48 kraken kernel: MCA: Global Cap 0x0000000000000106,
Status 0x0000000000000000
Aug 11 01:59:48 kraken kernel: MCA: Vendor "AuthenticAMD", ID 0x100f42,
APIC ID 0
Aug 11 01:59:48 kraken kernel: MCA: CPU 0 COR GCACHE LG RD error
Aug 11 01:59:48 kraken kernel: MCA: Address 0x5d0fe8c
from /var/run/dmesg.boot
Copyright (c) 1992-2010 The FreeBSD Project.
Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994
The Regents of the University of California. All rights reserved.
FreeBSD is a registered trademark of The FreeBSD Foundation.
FreeBSD 8.1-STABLE #0: Sun Jul 25 19:18:56 EDT 2010
d...@kraken.example.org:/usr/obj/usr/src/sys/KRAKEN amd64
Timecounter "i8254" frequency 1193182 Hz quality 0
CPU: AMD Phenom(tm) II X4 945 Processor (3010.17-MHz K8-class CPU)
Origin = "AuthenticAMD" Id = 0x100f42 Family = 10 Model = 4
Stepping = 2
Features=0x178bfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CLFLUSH,MMX,FXSR,SSE,SSE2,HTT>
Features2=0x802009<SSE3,MON,CX16,POPCNT>
AMD
Features=0xee500800<SYSCALL,NX,MMX+,FFXSR,Page1GB,RDTSCP,LM,3DNow!+,3DNow!>
AMD
Features2=0x37ff<LAHF,CMP,SVM,ExtAPIC,CR8,ABM,SSE4A,MAS,Prefetch,OSVW,IBS,SKINIT,WDT>
TSC: P-state invariant
real memory = 4294967296 (4096 MB)
avail memory = 4100710400 (3910 MB)
ACPI APIC Table: <111909 APIC1708>
FreeBSD/SMP: Multiprocessor System Detected: 4 CPUs
FreeBSD/SMP: 1 package(s) x 4 core(s)
cpu0 (BSP): APIC ID: 0
cpu1 (AP): APIC ID: 1
cpu2 (AP): APIC ID: 2
cpu3 (AP): APIC ID: 3
Andrew: You posted about this on July 14. Anything new since then?
John: Is it time for me to get a new CPU?
Hmm, this is what mcelog says:
HARDWARE ERROR. This is *NOT* a software problem!
Please contact your hardware vendor
CPU 0 4 northbridge
ADDR 5d0fe8c
Northbridge NB Array Error
bit33 = err cpu1
bit42 = L3 subcache in error bit 0
bit43 = L3 subcache in error bit 1
bit46 = corrected ecc error
memory/cache error 'generic read mem transaction, generic
transaction, level generic'
STATUS 94614c62001c011b MCGSTATUS 0
MCGCAP 106 APICID 0 SOCKETID 0
CPUID Vendor AMD Family 16 Model 4
It was a corrected ECC error. If you get more than one then perhaps the
CPU is busted, but if you only get one, an isolated bit flip may not be
worth worrying about.
--
John Baldwin
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