Cisco CEF Note

R1#sh process
CPU utilization for five seconds: 1%/0%; one minute: 0%; five minutes: 0%
PID QTy PC Runtime (ms) Invoked uSecs Stacks TTY Process
1 Cwe 6066730C 20 76 263 5416/6000 0 Chunk Manager
2 Csp 60648A30 4 40 100 2508/3000 0 Load Meter
3 M* 0 604 80 755010588/12000 0 Exec
4 Mwe 61BCE1EC 0 1 023360/24000 0 EDDRI_MAIN
5 Lst 60663864 228 25 9120 5316/6000 0 Check heaps
6 Cwe 6066B3A4 0 1 0 5612/6000 0 Pool Manager
7 Mst 604E4958 4 2 2000 5480/6000 0 Timers
8 Mwe 600A3BB4 0 2 0 5472/6000 0 Serial Backgroun
9 Mwe 60495054 4 2 2000 5468/6000 0 AAA high-capacit
10 Lwe 6049905C 0 1 0 5760/6000 0 AAA_SERVER_DEADT
11 Mwe 60510D8C 0 1 011604/12000 0 Policy Manager

解释一下什么Lwe 什么的概念

第一个字母代表的是优先级

Critical— Processes that allocate resources for other processes and must be run periodically for the router to operate properly. For example, the pool manager process is critical.

High— Processes that require very quick response times; Net Input, which accepts packets off of interfaces, is high priority.

Medium— The default process priority; almost all processes run at this priority.

Low— Periodic background processes that aren’t required for router operation; Logger, which records Syslog messages, is a low-priority process

后面的代表的是状态

*— Process is running on the CPU (you’ll almost always see exec as the current process on the processor, because it is almost always the place you run this command from).
E— Process is waiting on an event.
S —Process is suspended.
rd— Process is ready to run.
we— Process is idle and waiting on an event.
sa— Process is idle until a specific (absolute) time occurs.
si— Process is idle until a specific amount of time passes.
sp— Process is idle until a specific amount of time passes; this state is used for processes that run periodically.
st— Process is idle until a timer expires.
hg— Process is hung.
xx— Process is dead.

比如这个

3 M* 0 604 80 755010588/12000 0 Exec

意味着是中优先级，正在cpu上操作

至于优先级的处理呢，看看这个图就可以了

R1#sh processes memory
Processor Pool Total: 160500704 Used: 18377476 Free: 142123228
I/O Pool Total: 12582912 Used: 2825376 Free: 9757536

PID TTY Allocated Freed Holding Getbufs Retbufs Process
0 0 34471968 14331280 17330420 0 0 *Init*
0 0 12052 79768 12052 0 0 *Sched*
0 0 15824 796096 2360 179208 179208 *Dead*

Init— Accounts for the memory allocated before the scheduler, memory pool manager, and other such processes come up.

Sched— Accounts for the memory used in the process scheduler; the scheduler isn’t a separate process.

Dead— Accounts for memory that is allocated to processes that have entered the dead state.