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perf: add page (#1556)

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Muhammad Falak R Wani 2017-10-20 23:14:29 +05:30
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# perf
> Framework for linux performance counter measurements.
- Gather basic performance counter stats for a command:
`perf stat {{command}}`
- Display system-wide real time performance counter profile:
`sudo perf top`
- Run a command and record its profile into perf.data:
`sudo perf record {{command}}`
- Read perf.data (created by perf record) and display the profile:
`sudo perf report`