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`ps -o pcpu,pmem,nlwp -p $PID`
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ÆäÖÐpcpu¶¨ÒåÊÇ:cpu utilization of the process in “##.#” format. It is the CPU time used divided by the time the process has been running (cputime/realtime ratio), expressed as a percentage. pcpu gives me the % CPU utilization for the process for the lifetime of the process.
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Performance Monitoring Tools for Linux£Û½âÊͺÜÇåÎúµÄһƪÎÄÕ£Ý
/proc/stat explained
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Performance Management Guide [AIX,½²½â¸÷ÖÖ¹¤¾ß]
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