Technical data

Chapter 3
Diagnostics
Shelf Manager (ShMM) Diagnostics User Interface
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NOTE Many of these exceptions can be caused by code errors. Before replacing a CPU, verify that the
programs running on the system are not known to have defects. Running known “good test
programs” to verify the errors is recommended.
All errors are logged in this format:
<Date> <hostname> <alert level> <logging daemon> CPUERR:<type>(Process ID, Program Counter,
Address)
A Mod exception will be reported as:
Jan 1 00:10:17 demo syslog.alert klogd: CPUERR:Mod(PID=71, PC=0x400700,
BadVaddr=0x2aaa8000)
TLBL TLB exception (load or instruction
fetch)
TLBS TLB exception (store)
AdEL Address error exception (load or
instruction fetch)
AdES Address error exception (store)
Sys Syscall exception
BP Breakpoint exception
RI Reserved instruction exception
CpU Coprocessor Unusable exception
Ov Arithmetic Overflow exception
Tr Trap exception
Table 3-2 CPU Error Types (Continued)
Exception Description