Chapter 13
perf
perf(1) is the official Linux profiler and is in the Linux kernel source under tools/perf.1 It is a multi-tool that has profiling, tracing, and scripting capabilities, and is the front-end to the kernel perf_events observability subsystem. perf_events is also known as Performance Counters for Linux (PCL) or Linux Performance Events (LPE). perf_events and the perf(1) front-end began with performance monitoring counter (PMC) capabilities, but have since grown to support event-based tracing sources as well: tracepoints, kprobes, uprobes, and USDT.
1perf(1) is unusual in that it is a large, complex user-level program that is in the Linux kernel source tree. Maintainer Arnaldo Carvalho de Melo described this situation to me as an ...
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