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-rw-r--r--tools/perf/Documentation/perf-top.txt112
1 files changed, 99 insertions, 13 deletions
diff --git a/tools/perf/Documentation/perf-top.txt b/tools/perf/Documentation/perf-top.txt
index 539d01289725..4a7d558dc309 100644
--- a/tools/perf/Documentation/perf-top.txt
+++ b/tools/perf/Documentation/perf-top.txt
@@ -3,36 +3,122 @@ perf-top(1)
NAME
----
-perf-top - Run a command and profile it
+perf-top - System profiling tool.
SYNOPSIS
--------
[verse]
-'perf top' [-e <EVENT> | --event=EVENT] [-l] [-a] <command>
+'perf top' [-e <EVENT> | --event=EVENT] [<options>]
DESCRIPTION
-----------
-This command runs a command and gathers a performance counter profile
-from it.
+This command generates and displays a performance counter profile in realtime.
OPTIONS
-------
-<command>...::
- Any command you can specify in a shell.
+-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=::
+-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.
+ hexadecimal event descriptor.
--a::
- system-wide collection
+-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.
--l::
- scale counter values
SEE ALSO
--------