show processes Command
The show processes exec command displays your router's CPU utilization and a list of active processes along with their corresponding process ID, priority, scheduler test (status), CPU time used, number of times invoked, and so on. This command is also very useful when you are evaluating your router's performance and CPU utilization.
A sample output of the show processes command is shown in Example 4-10. As you can see, the first line of the output shows the CPU utilization for the last five seconds, one minute, and five minutes. The output provides 4%/4% in front of the CPU utilization for the last five seconds: the first number is the total utilization and the second number is the utilization due to interrupt routines.
Example 4-10 A Sample Output of the show processes Exec Command
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A_BackR#show processes |
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CPU utilization for five seconds: 4%/4%; one minute: 6%; fiveminutes: 5% |
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PID Q Ty PC Runtime(ms) Invoked uSecs Stacks TTY Process |
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1 C sp 31B6178 28 353 79 736/1000 0 Load Meter |
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2 M * 0 324 154 2103 2588/4000 0 Exec |
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3 L st 31A7112 5584 167 33437 1768/2000 0 Check heaps |
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4 C we 31ACF5A 0 1 0 1732/2000 0 Pool Manager |
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5 M st 3147E02 4 2 2000 1700/2000 0 Timers |
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6 M we 30E6690 0 2 0 1700/2000 0 SerialBackgroun |
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7 L we 31D4BD0 4 52 76 1612/2000 0 ARP Input |
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8 M we 32D6848 4 2 2000 1624/2000 0 DDR Timers |
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9 M we 30EA414 0 1 0 1736/2000 0 SERIAL A'detect |
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10 M we 31F9270 604 398 1517 3024/4000 0 IP Input |
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11 M we 3264668 84 206 407 1556/2000 0 CDP Protocol |
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When you decide to use the show processes command, try to execute it a few times, with a one-minute lapse in between, to get a more reliable idea about which processes are invoked most often and how much CPU time they consumed. You may also execute the show processes cpu command to get the five-second, one-minute, and five-minute display of CPU utilization for each process. Table 4-8 shows some of the column headings used in the output of the show processes command with a brief description for each of them.
Table 4-8 Some of the Column Headings of the show processes Command Output
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Column Heading |
Description |
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PID |
Process ID |
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Q |
Priority (C: Critical, H: High, M: Medium, L: Low) |
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Ty |
Scheduler Test (status) *: currently running E: waiting We: waiting for an event Sa: sleeping until an absolute time Si: sleeping for a time interval St: sleeping until a timer expires Hg: hung Xx: dead |
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PC |
Program Counter |
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Runtime |
CPU time the process has used (in milliseconds) |
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Invoked |
Number of times the process has been invoked |
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uSecs |
Number of microseconds of CPU time used at each invoke |