Dynamic probe on function
Add a kprobe with an argument, then record it; inspect kernel internals without rebuilding
perf probe --add 'tcp_sendmsg size' && perf record -e probe:tcp_sendmsg -a -- sleep 5
- tool
- perf17 commands
More perf commands
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perf record -g ./my_appRecord performance data with call-graph info
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perf reportInteractive display of recorded perf data
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perf listList all supported perf events on current system
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perf stat ls -laShow hardware counters for a command
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perf record -e cache-misses ./my_appRecord only cache-miss events