perf(1) [php man page]

PERF(1) 						      General Commands Manual							   PERF(1)

NAME

       perf - performance analysis tools for Linux

SYNOPSIS

       perf [--version] [--help] COMMAND [ARGS]

DESCRIPTION

       Performance  counters for Linux are are a new kernel-based subsystem that provide a framework for all things performance analysis.  It cov-
       ers hardware level (CPU/PMU, Performance Monitoring Unit) features and software features (software counters, tracepoints) as well.

       Each version of the perf tools may depend on new kernel features, so you must install a different version for  each  kernel  version.   The
       perf command will automatically run the correct version for the running kernel version.

SEE ALSO

       perf_version(1)

								    4 July 2010 							   PERF(1)

PERF-TRACE(1)							    perf Manual 						     PERF-TRACE(1)

NAME

       perf-trace - strace inspired tool

SYNOPSIS

       perf trace

DESCRIPTION

       This command will show the events associated with the target, initially syscalls, but other system events like pagefaults, task lifetime
       events, scheduling events, etc.

       Initially this is a live mode only tool, but eventually will work with perf.data files like the other tools, allowing a detached record
       from analysis phases.

OPTIONS

       -a, --all-cpus
	   System-wide collection from all CPUs.

       -e, --expr
	   List of events to show, currently only syscall names. Prefixing with ! shows all syscalls but the ones specified. You may need to
	   escape it.

       -o, --output=
	   Output file name.

       -p, --pid=
	   Record events on existing process ID (comma separated list).

       -t, --tid=
	   Record events on existing thread ID (comma separated list).

       -u, --uid=
	   Record events in threads owned by uid. Name or number.

       -v, --verbose=
	   Verbosity level.

       -i, --no-inherit
	   Child tasks do not inherit counters.

       -m, --mmap-pages=
	   Number of mmap data pages. Must be a power of two.

       -C, --cpu
	   Collect samples only on the list of CPUs provided. Multiple CPUs can be provided as a comma-separated list with no space: 0,1. Ranges
	   of CPUs are specified with -: 0-2. In per-thread mode with inheritance mode on (default), Events are captured only when the thread
	   executes on the designated CPUs. Default is to monitor all CPUs.

       --duration: Show only events that had a duration greater than N.M ms.

       --sched: Accrue thread runtime and provide a summary at the end of the session.

       -i --input Process events from a given perf data file.

SEE ALSO

       perf-record(1), perf-script(1)

perf								    06/30/2014							     PERF-TRACE(1)