mirror of
https://github.com/torvalds/linux.git
synced 2024-12-28 05:41:55 +00:00
6fe8c26d7a
The --fields option is to allow user setup output field in any order.
It can receive any sort keys and following (hpp) fields:
overhead, overhead_sys, overhead_us, sample and period
If guest profiling is enabled, overhead_guest_{sys,us} will be
available too.
More more information, please see previous patch "perf report:
Add -F option to specify output fields"
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Link: http://lkml.kernel.org/r/1400480762-22852-15-git-send-email-namhyung@kernel.org
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
226 lines
5.2 KiB
Plaintext
226 lines
5.2 KiB
Plaintext
perf-top(1)
|
|
===========
|
|
|
|
NAME
|
|
----
|
|
perf-top - System profiling tool.
|
|
|
|
SYNOPSIS
|
|
--------
|
|
[verse]
|
|
'perf top' [-e <EVENT> | --event=EVENT] [<options>]
|
|
|
|
DESCRIPTION
|
|
-----------
|
|
This command generates and displays a performance counter profile in real time.
|
|
|
|
|
|
OPTIONS
|
|
-------
|
|
-a::
|
|
--all-cpus::
|
|
System-wide collection. (default)
|
|
|
|
-c <count>::
|
|
--count=<count>::
|
|
Event period to sample.
|
|
|
|
-C <cpu-list>::
|
|
--cpu=<cpu>::
|
|
Monitor 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.
|
|
Default is to monitor all CPUS.
|
|
|
|
-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.
|
|
|
|
--group::
|
|
Put the counters into a counter group.
|
|
|
|
-F <freq>::
|
|
--freq=<freq>::
|
|
Profile at this frequency.
|
|
|
|
-i::
|
|
--inherit::
|
|
Child tasks do not inherit counters.
|
|
|
|
-k <path>::
|
|
--vmlinux=<path>::
|
|
Path to vmlinux. Required for annotation functionality.
|
|
|
|
-m <pages>::
|
|
--mmap-pages=<pages>::
|
|
Number of mmap data pages (must be a power of two) or size
|
|
specification with appended unit character - B/K/M/G. The
|
|
size is rounded up to have nearest pages power of two value.
|
|
|
|
-p <pid>::
|
|
--pid=<pid>::
|
|
Profile events on existing Process ID (comma separated list).
|
|
|
|
-t <tid>::
|
|
--tid=<tid>::
|
|
Profile events on existing thread ID (comma separated list).
|
|
|
|
-u::
|
|
--uid=::
|
|
Record events in threads owned by uid. Name or number.
|
|
|
|
-r <priority>::
|
|
--realtime=<priority>::
|
|
Collect data with this RT SCHED_FIFO priority.
|
|
|
|
--sym-annotate=<symbol>::
|
|
Annotate this symbol.
|
|
|
|
-K::
|
|
--hide_kernel_symbols::
|
|
Hide kernel symbols.
|
|
|
|
-U::
|
|
--hide_user_symbols::
|
|
Hide user symbols.
|
|
|
|
-D::
|
|
--dump-symtab::
|
|
Dump the symbol table used for profiling.
|
|
|
|
-v::
|
|
--verbose::
|
|
Be more verbose (show counter open errors, etc).
|
|
|
|
-z::
|
|
--zero::
|
|
Zero history across display updates.
|
|
|
|
-s::
|
|
--sort::
|
|
Sort by key(s): pid, comm, dso, symbol, parent, srcline, weight,
|
|
local_weight, abort, in_tx, transaction, overhead, sample, period.
|
|
Please see description of --sort in the perf-report man page.
|
|
|
|
--fields=::
|
|
Specify output field - multiple keys can be specified in CSV format.
|
|
Following fields are available:
|
|
overhead, overhead_sys, overhead_us, sample and period.
|
|
Also it can contain any sort key(s).
|
|
|
|
By default, every sort keys not specified in --field will be appended
|
|
automatically.
|
|
|
|
-n::
|
|
--show-nr-samples::
|
|
Show a column with the number of samples.
|
|
|
|
--show-total-period::
|
|
Show a column with the sum of periods.
|
|
|
|
--dsos::
|
|
Only consider symbols in these dsos. This option will affect the
|
|
percentage of the overhead column. See --percentage for more info.
|
|
|
|
--comms::
|
|
Only consider symbols in these comms. This option will affect the
|
|
percentage of the overhead column. See --percentage for more info.
|
|
|
|
--symbols::
|
|
Only consider these symbols. This option will affect the
|
|
percentage of the overhead column. See --percentage for more info.
|
|
|
|
-M::
|
|
--disassembler-style=:: Set disassembler style for objdump.
|
|
|
|
--source::
|
|
Interleave source code with assembly code. Enabled by default,
|
|
disable with --no-source.
|
|
|
|
--asm-raw::
|
|
Show raw instruction encoding of assembly instructions.
|
|
|
|
-g::
|
|
Enables call-graph (stack chain/backtrace) recording.
|
|
|
|
--call-graph::
|
|
Setup and enable call-graph (stack chain/backtrace) recording,
|
|
implies -g.
|
|
|
|
--max-stack::
|
|
Set the stack depth limit when parsing the callchain, anything
|
|
beyond the specified depth will be ignored. This is a trade-off
|
|
between information loss and faster processing especially for
|
|
workloads that can have a very long callchain stack.
|
|
|
|
Default: 127
|
|
|
|
--ignore-callees=<regex>::
|
|
Ignore callees of the function(s) matching the given regex.
|
|
This has the effect of collecting the callers of each such
|
|
function into one place in the call-graph tree.
|
|
|
|
--percent-limit::
|
|
Do not show entries which have an overhead under that percent.
|
|
(Default: 0).
|
|
|
|
--percentage::
|
|
Determine how to display the overhead percentage of filtered entries.
|
|
Filters can be applied by --comms, --dsos and/or --symbols options and
|
|
Zoom operations on the TUI (thread, dso, etc).
|
|
|
|
"relative" means it's relative to filtered entries only so that the
|
|
sum of shown entries will be always 100%. "absolute" means it retains
|
|
the original value before and after the filter is applied.
|
|
|
|
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.
|
|
|
|
[z]::
|
|
Toggle event count zeroing across display updates.
|
|
|
|
[qQ]::
|
|
Quit.
|
|
|
|
Pressing any unmapped key displays a menu, and prompts for input.
|
|
|
|
|
|
SEE ALSO
|
|
--------
|
|
linkperf:perf-stat[1], linkperf:perf-list[1], linkperf:perf-report[1]
|