tldr/pages/linux/perf.md

perf

Framework for Linux performance counter measurements. More information: https://perf.wiki.kernel.org.

• Display basic performance counter stats for a command:

perf stat {{gcc hello.c}}

• 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}}

• Record the profile of an existing process into perf.data:

sudo perf record -p {{pid}}

• Read perf.data (created by perf record) and display the profile:

sudo perf report