TOP command Miss

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top, cont.
• 1. top can miss:
• short-lived processes
• kernel threads (tasks), unless included (see top options)

• 2. analyzing high CPU processes:
• identify why – profile code path
• identify what – execution or stall cycles

• High %CPU time may be stall cycles on memory I/O –
upgrading to faster CPUs doesn’t help!
Sunday, February


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