Provided by: linux-tools-common_2.6.32-21.32_all bug

NAME

       perf-top - System profiling tool.

SYNOPSIS

       perf top [-e <EVENT> | --event=EVENT] [<options>]

DESCRIPTION

       This command generates and displays a performance counter profile in
       realtime.

OPTIONS

       -a, --all-cpus
           System-wide collection. (default)

       -c <count>, --count=<count>
           Event period to sample.

       -C <cpu>, --CPU=<cpu>
           CPU to profile.

       -d <seconds>, --delay=<seconds>
           Number of seconds to delay between refreshes.

       -e <event>, --event=<event>
           Select the PMU event. Selection can be a symbolic event name (use
           perf list to list all events) or a raw PMU event (eventsel+umask)
           in the form of rNNN where NNN is a hexadecimal event descriptor.

       -E <entries>, --entries=<entries>
           Display this many functions.

       -f <count>, --count-filter=<count>
           Only display functions with more events than this.

       -F <freq>, --freq=<freq>
           Profile at this frequency.

       -i, --inherit
           Child tasks inherit counters, only makes sens with -p option.

       -k <path>, --vmlinux=<path>
           Path to vmlinux. Required for annotation functionality.

       -m <pages>, --mmap-pages=<pages>
           Number of mmapped data pages.

       -p <pid>, --pid=<pid>
           Profile events on existing pid.

       -r <priority>, --realtime=<priority>
           Collect data with this RT SCHED_FIFO priority.

       -s <symbol>, --sym-annotate=<symbol>
           Annotate this symbol. Requires -k option.

       -v, --verbose
           Be more verbose (show counter open errors, etc).

       -z, --zero
           Zero history across display updates.

INTERACTIVE PROMPTING KEYS

       [d]
           Display refresh delay.

       [e]
           Number of entries to display.

       [E]
           Event to display when multiple counters are active.

       [f]
           Profile display filter (>= hit count).

       [F]
           Annotation display filter (>= % of total).

       [s]
           Annotate symbol.

       [S]
           Stop annotation, return to full profile display.

       [w]
           Toggle between weighted sum and individual count[E]r profile.

       [z]
           Toggle event count zeroing across display updates.

       [qQ]
           Quit.

       Pressing any unmapped key displays a menu, and prompts for input.

SEE ALSO

       perf-stat(1), perf-list(1)