perf_4.91
Performance analysis tools for linux
Usage
perf [--version]
[--help]
[OPTIONS]
COMMAND
[ARGS]
Options
-
--debug -
Setup debug variable (see list below) in value range (0, 10). Use like: --debug verbose # sets verbose = 1 --debug verbose=2 # sets verbose = 2
List of debug variables allowed to set: verbose - general debug messages ordered-events - ordered events object debug messages data-convert - data convert command debug messages
-
--buildid-dir -
Setup buildid cache directory. It has higher priority than buildid.dir config file option.
-
-v, --version -
Display perf version.
-
-h, --help -
Run perf help command.
Overview
Performance counters for Linux are a new kernel-based subsystem that provide a framework for all things performance analysis. It covers hardware level (CPU/PMU, Performance Monitoring Unit) features and software features (software counters, tracepoints) as well.