2009-04-20 21:52:29 +08:00
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perf-top(1)
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2008-04-16 04:39:31 +08:00
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===========
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2009-04-20 21:52:29 +08:00
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NAME
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----
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2009-08-04 16:24:41 +08:00
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perf-top - System profiling tool.
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2009-04-20 21:52:29 +08:00
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SYNOPSIS
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--------
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[verse]
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2009-08-04 16:24:41 +08:00
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'perf top' [-e <EVENT> | --event=EVENT] [<options>]
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2009-04-20 21:52:29 +08:00
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DESCRIPTION
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-----------
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2010-12-01 09:57:21 +08:00
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This command generates and displays a performance counter profile in real time.
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2009-04-20 21:52:29 +08:00
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OPTIONS
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-------
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2009-08-04 16:24:41 +08:00
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-a::
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--all-cpus::
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System-wide collection. (default)
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-c <count>::
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--count=<count>::
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Event period to sample.
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2010-05-28 18:00:01 +08:00
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-C <cpu-list>::
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--cpu=<cpu>::
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2010-12-01 09:57:21 +08:00
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Monitor only on the list of CPUs provided. Multiple CPUs can be provided as a
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comma-separated list with no space: 0,1. Ranges of CPUs are specified with -: 0-2.
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2010-05-28 18:00:01 +08:00
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Default is to monitor all CPUS.
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2009-08-04 16:24:41 +08:00
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-d <seconds>::
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--delay=<seconds>::
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Number of seconds to delay between refreshes.
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2009-04-20 21:52:29 +08:00
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2009-08-04 16:24:41 +08:00
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-e <event>::
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--event=<event>::
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2009-06-06 20:56:33 +08:00
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Select the PMU event. Selection can be a symbolic event name
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(use 'perf list' to list all events) or a raw PMU
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event (eventsel+umask) in the form of rNNN where NNN is a
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2009-08-04 16:24:41 +08:00
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hexadecimal event descriptor.
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2009-04-20 21:52:29 +08:00
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2009-08-04 16:24:41 +08:00
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-E <entries>::
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--entries=<entries>::
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Display this many functions.
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-f <count>::
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--count-filter=<count>::
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Only display functions with more events than this.
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2010-12-01 09:57:21 +08:00
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--group::
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Put the counters into a counter group.
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2009-08-04 16:24:41 +08:00
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-F <freq>::
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--freq=<freq>::
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Profile at this frequency.
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-i::
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--inherit::
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2012-12-12 03:48:41 +08:00
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Child tasks do not inherit counters.
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2009-08-04 16:24:41 +08:00
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-k <path>::
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--vmlinux=<path>::
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Path to vmlinux. Required for annotation functionality.
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-m <pages>::
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--mmap-pages=<pages>::
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2013-09-01 18:36:13 +08:00
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Number of mmap data pages (must be a power of two) or size
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specification with appended unit character - B/K/M/G. The
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size is rounded up to have nearest pages power of two value.
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2009-08-04 16:24:41 +08:00
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-p <pid>::
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--pid=<pid>::
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2012-02-09 00:32:52 +08:00
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Profile events on existing Process ID (comma separated list).
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2010-12-01 09:57:21 +08:00
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-t <tid>::
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--tid=<tid>::
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2012-02-09 00:32:52 +08:00
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Profile events on existing thread ID (comma separated list).
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2009-08-04 16:24:41 +08:00
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2012-01-20 00:08:15 +08:00
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-u::
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--uid=::
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Record events in threads owned by uid. Name or number.
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2009-08-04 16:24:41 +08:00
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-r <priority>::
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--realtime=<priority>::
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Collect data with this RT SCHED_FIFO priority.
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--sym-annotate=<symbol>::
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2010-02-04 02:52:08 +08:00
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Annotate this symbol.
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2009-08-04 16:24:41 +08:00
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2010-12-01 09:57:21 +08:00
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-K::
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--hide_kernel_symbols::
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Hide kernel symbols.
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-U::
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--hide_user_symbols::
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Hide user symbols.
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2014-09-13 12:15:05 +08:00
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--demangle-kernel::
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Demangle kernel symbols.
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2010-12-01 09:57:21 +08:00
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-D::
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--dump-symtab::
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Dump the symbol table used for profiling.
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2009-08-04 16:24:41 +08:00
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-v::
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--verbose::
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Be more verbose (show counter open errors, etc).
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-z::
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--zero::
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Zero history across display updates.
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perf top: Reuse the 'report' hist_entry/hists classes
This actually fixes several problems we had in the old 'perf top':
1. Unresolved symbols not show, limitation that came from the old
"KernelTop" codebase, to solve it we would need to do changes
that would make sym_entry have most of the hist_entry fields.
2. It was using the number of samples, not the sum of sample->period.
And brings the --sort code that allows us to have all the views in
'perf report', for instance:
[root@emilia ~]# perf top --sort dso
PerfTop: 5903 irqs/sec kernel:77.5% exact: 0.0% [1000Hz cycles], (all, 8 CPUs)
------------------------------------------------------------------------------
31.59% libcrypto.so.1.0.0
21.55% [kernel]
18.57% libpython2.6.so.1.0
7.04% libc-2.12.so
6.99% _backend_agg.so
4.72% sshd
1.48% multiarray.so
1.39% libfreetype.so.6.3.22
1.37% perf
0.71% libgobject-2.0.so.0.2200.5
0.53% [tg3]
0.48% libglib-2.0.so.0.2200.5
0.44% libstdc++.so.6.0.13
0.40% libcairo.so.2.10800.8
0.38% libm-2.12.so
0.34% umath.so
0.30% libgdk-x11-2.0.so.0.1800.9
0.22% libpthread-2.12.so
0.20% libgtk-x11-2.0.so.0.1800.9
0.20% librt-2.12.so
0.15% _path.so
0.13% libpango-1.0.so.0.2800.1
0.11% libatlas.so.3.0
0.09% ft2font.so
0.09% libpangoft2-1.0.so.0.2800.1
0.08% libX11.so.6.3.0
0.07% [vdso]
0.06% cyclictest
^C
All the filter lists can be used as well: --dsos, --comms, --symbols,
etc.
The 'perf report' TUI is also reused, being possible to apply all the
zoom operations, do annotation, etc.
This change will allow multiple simplifications in the symbol system as
well, that will be detailed in upcoming changesets.
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-xzaaldxq7zhqrrxdxjifk1mh@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2011-10-06 06:16:15 +08:00
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-s::
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--sort::
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2013-09-20 22:40:41 +08:00
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Sort by key(s): pid, comm, dso, symbol, parent, srcline, weight,
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2014-03-04 08:06:42 +08:00
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local_weight, abort, in_tx, transaction, overhead, sample, period.
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Please see description of --sort in the perf-report man page.
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perf top: Reuse the 'report' hist_entry/hists classes
This actually fixes several problems we had in the old 'perf top':
1. Unresolved symbols not show, limitation that came from the old
"KernelTop" codebase, to solve it we would need to do changes
that would make sym_entry have most of the hist_entry fields.
2. It was using the number of samples, not the sum of sample->period.
And brings the --sort code that allows us to have all the views in
'perf report', for instance:
[root@emilia ~]# perf top --sort dso
PerfTop: 5903 irqs/sec kernel:77.5% exact: 0.0% [1000Hz cycles], (all, 8 CPUs)
------------------------------------------------------------------------------
31.59% libcrypto.so.1.0.0
21.55% [kernel]
18.57% libpython2.6.so.1.0
7.04% libc-2.12.so
6.99% _backend_agg.so
4.72% sshd
1.48% multiarray.so
1.39% libfreetype.so.6.3.22
1.37% perf
0.71% libgobject-2.0.so.0.2200.5
0.53% [tg3]
0.48% libglib-2.0.so.0.2200.5
0.44% libstdc++.so.6.0.13
0.40% libcairo.so.2.10800.8
0.38% libm-2.12.so
0.34% umath.so
0.30% libgdk-x11-2.0.so.0.1800.9
0.22% libpthread-2.12.so
0.20% libgtk-x11-2.0.so.0.1800.9
0.20% librt-2.12.so
0.15% _path.so
0.13% libpango-1.0.so.0.2800.1
0.11% libatlas.so.3.0
0.09% ft2font.so
0.09% libpangoft2-1.0.so.0.2800.1
0.08% libX11.so.6.3.0
0.07% [vdso]
0.06% cyclictest
^C
All the filter lists can be used as well: --dsos, --comms, --symbols,
etc.
The 'perf report' TUI is also reused, being possible to apply all the
zoom operations, do annotation, etc.
This change will allow multiple simplifications in the symbol system as
well, that will be detailed in upcoming changesets.
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-xzaaldxq7zhqrrxdxjifk1mh@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2011-10-06 06:16:15 +08:00
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2014-03-04 10:01:41 +08:00
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--fields=::
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Specify output field - multiple keys can be specified in CSV format.
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Following fields are available:
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2013-10-30 16:05:55 +08:00
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overhead, overhead_sys, overhead_us, overhead_children, sample and period.
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2014-03-04 10:01:41 +08:00
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Also it can contain any sort key(s).
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By default, every sort keys not specified in --field will be appended
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automatically.
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perf top: Reuse the 'report' hist_entry/hists classes
This actually fixes several problems we had in the old 'perf top':
1. Unresolved symbols not show, limitation that came from the old
"KernelTop" codebase, to solve it we would need to do changes
that would make sym_entry have most of the hist_entry fields.
2. It was using the number of samples, not the sum of sample->period.
And brings the --sort code that allows us to have all the views in
'perf report', for instance:
[root@emilia ~]# perf top --sort dso
PerfTop: 5903 irqs/sec kernel:77.5% exact: 0.0% [1000Hz cycles], (all, 8 CPUs)
------------------------------------------------------------------------------
31.59% libcrypto.so.1.0.0
21.55% [kernel]
18.57% libpython2.6.so.1.0
7.04% libc-2.12.so
6.99% _backend_agg.so
4.72% sshd
1.48% multiarray.so
1.39% libfreetype.so.6.3.22
1.37% perf
0.71% libgobject-2.0.so.0.2200.5
0.53% [tg3]
0.48% libglib-2.0.so.0.2200.5
0.44% libstdc++.so.6.0.13
0.40% libcairo.so.2.10800.8
0.38% libm-2.12.so
0.34% umath.so
0.30% libgdk-x11-2.0.so.0.1800.9
0.22% libpthread-2.12.so
0.20% libgtk-x11-2.0.so.0.1800.9
0.20% librt-2.12.so
0.15% _path.so
0.13% libpango-1.0.so.0.2800.1
0.11% libatlas.so.3.0
0.09% ft2font.so
0.09% libpangoft2-1.0.so.0.2800.1
0.08% libX11.so.6.3.0
0.07% [vdso]
0.06% cyclictest
^C
All the filter lists can be used as well: --dsos, --comms, --symbols,
etc.
The 'perf report' TUI is also reused, being possible to apply all the
zoom operations, do annotation, etc.
This change will allow multiple simplifications in the symbol system as
well, that will be detailed in upcoming changesets.
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-xzaaldxq7zhqrrxdxjifk1mh@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2011-10-06 06:16:15 +08:00
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-n::
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--show-nr-samples::
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Show a column with the number of samples.
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--show-total-period::
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Show a column with the sum of periods.
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--dsos::
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2014-02-07 11:06:07 +08:00
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Only consider symbols in these dsos. This option will affect the
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percentage of the overhead column. See --percentage for more info.
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perf top: Reuse the 'report' hist_entry/hists classes
This actually fixes several problems we had in the old 'perf top':
1. Unresolved symbols not show, limitation that came from the old
"KernelTop" codebase, to solve it we would need to do changes
that would make sym_entry have most of the hist_entry fields.
2. It was using the number of samples, not the sum of sample->period.
And brings the --sort code that allows us to have all the views in
'perf report', for instance:
[root@emilia ~]# perf top --sort dso
PerfTop: 5903 irqs/sec kernel:77.5% exact: 0.0% [1000Hz cycles], (all, 8 CPUs)
------------------------------------------------------------------------------
31.59% libcrypto.so.1.0.0
21.55% [kernel]
18.57% libpython2.6.so.1.0
7.04% libc-2.12.so
6.99% _backend_agg.so
4.72% sshd
1.48% multiarray.so
1.39% libfreetype.so.6.3.22
1.37% perf
0.71% libgobject-2.0.so.0.2200.5
0.53% [tg3]
0.48% libglib-2.0.so.0.2200.5
0.44% libstdc++.so.6.0.13
0.40% libcairo.so.2.10800.8
0.38% libm-2.12.so
0.34% umath.so
0.30% libgdk-x11-2.0.so.0.1800.9
0.22% libpthread-2.12.so
0.20% libgtk-x11-2.0.so.0.1800.9
0.20% librt-2.12.so
0.15% _path.so
0.13% libpango-1.0.so.0.2800.1
0.11% libatlas.so.3.0
0.09% ft2font.so
0.09% libpangoft2-1.0.so.0.2800.1
0.08% libX11.so.6.3.0
0.07% [vdso]
0.06% cyclictest
^C
All the filter lists can be used as well: --dsos, --comms, --symbols,
etc.
The 'perf report' TUI is also reused, being possible to apply all the
zoom operations, do annotation, etc.
This change will allow multiple simplifications in the symbol system as
well, that will be detailed in upcoming changesets.
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-xzaaldxq7zhqrrxdxjifk1mh@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2011-10-06 06:16:15 +08:00
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--comms::
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2014-02-07 11:06:07 +08:00
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Only consider symbols in these comms. This option will affect the
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percentage of the overhead column. See --percentage for more info.
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perf top: Reuse the 'report' hist_entry/hists classes
This actually fixes several problems we had in the old 'perf top':
1. Unresolved symbols not show, limitation that came from the old
"KernelTop" codebase, to solve it we would need to do changes
that would make sym_entry have most of the hist_entry fields.
2. It was using the number of samples, not the sum of sample->period.
And brings the --sort code that allows us to have all the views in
'perf report', for instance:
[root@emilia ~]# perf top --sort dso
PerfTop: 5903 irqs/sec kernel:77.5% exact: 0.0% [1000Hz cycles], (all, 8 CPUs)
------------------------------------------------------------------------------
31.59% libcrypto.so.1.0.0
21.55% [kernel]
18.57% libpython2.6.so.1.0
7.04% libc-2.12.so
6.99% _backend_agg.so
4.72% sshd
1.48% multiarray.so
1.39% libfreetype.so.6.3.22
1.37% perf
0.71% libgobject-2.0.so.0.2200.5
0.53% [tg3]
0.48% libglib-2.0.so.0.2200.5
0.44% libstdc++.so.6.0.13
0.40% libcairo.so.2.10800.8
0.38% libm-2.12.so
0.34% umath.so
0.30% libgdk-x11-2.0.so.0.1800.9
0.22% libpthread-2.12.so
0.20% libgtk-x11-2.0.so.0.1800.9
0.20% librt-2.12.so
0.15% _path.so
0.13% libpango-1.0.so.0.2800.1
0.11% libatlas.so.3.0
0.09% ft2font.so
0.09% libpangoft2-1.0.so.0.2800.1
0.08% libX11.so.6.3.0
0.07% [vdso]
0.06% cyclictest
^C
All the filter lists can be used as well: --dsos, --comms, --symbols,
etc.
The 'perf report' TUI is also reused, being possible to apply all the
zoom operations, do annotation, etc.
This change will allow multiple simplifications in the symbol system as
well, that will be detailed in upcoming changesets.
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-xzaaldxq7zhqrrxdxjifk1mh@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2011-10-06 06:16:15 +08:00
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--symbols::
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2014-02-07 11:06:07 +08:00
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Only consider these symbols. This option will affect the
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percentage of the overhead column. See --percentage for more info.
|
perf top: Reuse the 'report' hist_entry/hists classes
This actually fixes several problems we had in the old 'perf top':
1. Unresolved symbols not show, limitation that came from the old
"KernelTop" codebase, to solve it we would need to do changes
that would make sym_entry have most of the hist_entry fields.
2. It was using the number of samples, not the sum of sample->period.
And brings the --sort code that allows us to have all the views in
'perf report', for instance:
[root@emilia ~]# perf top --sort dso
PerfTop: 5903 irqs/sec kernel:77.5% exact: 0.0% [1000Hz cycles], (all, 8 CPUs)
------------------------------------------------------------------------------
31.59% libcrypto.so.1.0.0
21.55% [kernel]
18.57% libpython2.6.so.1.0
7.04% libc-2.12.so
6.99% _backend_agg.so
4.72% sshd
1.48% multiarray.so
1.39% libfreetype.so.6.3.22
1.37% perf
0.71% libgobject-2.0.so.0.2200.5
0.53% [tg3]
0.48% libglib-2.0.so.0.2200.5
0.44% libstdc++.so.6.0.13
0.40% libcairo.so.2.10800.8
0.38% libm-2.12.so
0.34% umath.so
0.30% libgdk-x11-2.0.so.0.1800.9
0.22% libpthread-2.12.so
0.20% libgtk-x11-2.0.so.0.1800.9
0.20% librt-2.12.so
0.15% _path.so
0.13% libpango-1.0.so.0.2800.1
0.11% libatlas.so.3.0
0.09% ft2font.so
0.09% libpangoft2-1.0.so.0.2800.1
0.08% libX11.so.6.3.0
0.07% [vdso]
0.06% cyclictest
^C
All the filter lists can be used as well: --dsos, --comms, --symbols,
etc.
The 'perf report' TUI is also reused, being possible to apply all the
zoom operations, do annotation, etc.
This change will allow multiple simplifications in the symbol system as
well, that will be detailed in upcoming changesets.
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-xzaaldxq7zhqrrxdxjifk1mh@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2011-10-06 06:16:15 +08:00
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2011-10-06 23:48:31 +08:00
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-M::
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--disassembler-style=:: Set disassembler style for objdump.
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--source::
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Interleave source code with assembly code. Enabled by default,
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disable with --no-source.
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--asm-raw::
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Show raw instruction encoding of assembly instructions.
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2013-11-15 11:51:30 +08:00
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-g::
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2013-10-26 22:25:34 +08:00
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Enables call-graph (stack chain/backtrace) recording.
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perf top: Support call-graph display options also
Currently 'perf top --call-graph' option is same as 'perf record'. But
'perf top' also need to receive display options in 'perf report'. To do
that, change parse_callchain_report_opt() to allow record options too.
Now perf top can receive display options like below:
$ perf top --call-graph
Error: option `call-graph' requires a value
Usage: perf top [<options>]
--call-graph
<mode[,dump_size],output_type,min_percent[,print_limit],call_order[,branch]>
setup and enables call-graph (stack chain/backtrace)
recording: fp dwarf lbr, output_type (graph, flat,
fractal, or none), min percent threshold, optional
print limit, callchain order, key (function or
address), add branches
$ perf top --call-graph callee,graph,fp
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Borislav Petkov <bp@suse.de>
Cc: Brendan Gregg <brendan.d.gregg@gmail.com>
Cc: Chandler Carruth <chandlerc@gmail.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Stephane Eranian <eranian@google.com>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/r/1445495330-25416-2-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-10-22 14:28:49 +08:00
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--call-graph [mode,type,min[,limit],order[,key][,branch]]::
|
2013-10-26 22:25:34 +08:00
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Setup and enable call-graph (stack chain/backtrace) recording,
|
perf top: Support call-graph display options also
Currently 'perf top --call-graph' option is same as 'perf record'. But
'perf top' also need to receive display options in 'perf report'. To do
that, change parse_callchain_report_opt() to allow record options too.
Now perf top can receive display options like below:
$ perf top --call-graph
Error: option `call-graph' requires a value
Usage: perf top [<options>]
--call-graph
<mode[,dump_size],output_type,min_percent[,print_limit],call_order[,branch]>
setup and enables call-graph (stack chain/backtrace)
recording: fp dwarf lbr, output_type (graph, flat,
fractal, or none), min percent threshold, optional
print limit, callchain order, key (function or
address), add branches
$ perf top --call-graph callee,graph,fp
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Borislav Petkov <bp@suse.de>
Cc: Brendan Gregg <brendan.d.gregg@gmail.com>
Cc: Chandler Carruth <chandlerc@gmail.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Stephane Eranian <eranian@google.com>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/r/1445495330-25416-2-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-10-22 14:28:49 +08:00
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implies -g. See `--call-graph` section in perf-record and
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perf-report man pages for details.
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2011-10-06 06:30:22 +08:00
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2013-10-30 16:05:55 +08:00
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--children::
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Accumulate callchain of children to parent entry so that then can
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show up in the output. The output will have a new "Children" column
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and will be sorted on the data. It requires -g/--call-graph option
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2015-04-22 14:33:45 +08:00
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enabled. See the `overhead calculation' section for more details.
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2016-12-03 00:07:32 +08:00
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Enabled by default, disable with --no-children.
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2013-10-30 16:05:55 +08:00
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2013-10-18 22:38:49 +08:00
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--max-stack::
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Set the stack depth limit when parsing the callchain, anything
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beyond the specified depth will be ignored. This is a trade-off
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between information loss and faster processing especially for
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workloads that can have a very long callchain stack.
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2016-04-27 21:16:24 +08:00
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Default: /proc/sys/kernel/perf_event_max_stack when present, 127 otherwise.
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2013-10-18 22:38:49 +08:00
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2012-12-07 13:48:05 +08:00
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--ignore-callees=<regex>::
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Ignore callees of the function(s) matching the given regex.
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This has the effect of collecting the callers of each such
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function into one place in the call-graph tree.
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2013-05-14 10:09:05 +08:00
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--percent-limit::
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Do not show entries which have an overhead under that percent.
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(Default: 0).
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2014-02-07 11:06:07 +08:00
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--percentage::
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Determine how to display the overhead percentage of filtered entries.
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Filters can be applied by --comms, --dsos and/or --symbols options and
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Zoom operations on the TUI (thread, dso, etc).
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"relative" means it's relative to filtered entries only so that the
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sum of shown entries will be always 100%. "absolute" means it retains
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the original value before and after the filter is applied.
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2014-07-31 13:47:39 +08:00
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-w::
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--column-widths=<width[,width...]>::
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Force each column width to the provided list, for large terminal
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readability. 0 means no limit (default behavior).
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2015-06-17 21:51:11 +08:00
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--proc-map-timeout::
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When processing pre-existing threads /proc/XXX/mmap, it may take
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a long time, because the file may be huge. A time out is needed
|
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in such cases.
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This option sets the time out limit. The default value is 500 ms.
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2014-07-31 13:47:39 +08:00
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2015-07-18 23:24:52 +08:00
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-b::
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--branch-any::
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Enable taken branch stack sampling. Any type of taken branch may be sampled.
|
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This is a shortcut for --branch-filter any. See --branch-filter for more infos.
|
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-j::
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|
--branch-filter::
|
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Enable taken branch stack sampling. Each sample captures a series of consecutive
|
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|
|
taken branches. The number of branches captured with each sample depends on the
|
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|
underlying hardware, the type of branches of interest, and the executed code.
|
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|
It is possible to select the types of branches captured by enabling filters.
|
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|
For a full list of modifiers please see the perf record manpage.
|
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The option requires at least one branch type among any, any_call, any_ret, ind_call, cond.
|
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|
|
The privilege levels may be omitted, in which case, the privilege levels of the associated
|
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|
|
|
event are applied to the branch filter. Both kernel (k) and hypervisor (hv) privilege
|
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|
|
|
levels are subject to permissions. When sampling on multiple events, branch stack sampling
|
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|
|
is enabled for all the sampling events. The sampled branch type is the same for all events.
|
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|
|
The various filters must be specified as a comma separated list: --branch-filter any_ret,u,k
|
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|
|
Note that this feature may not be available on all processors.
|
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|
|
2015-12-23 01:07:05 +08:00
|
|
|
--raw-trace::
|
|
|
|
|
When displaying traceevent output, do not use print fmt or plugins.
|
|
|
|
|
|
2016-02-24 23:13:50 +08:00
|
|
|
--hierarchy::
|
|
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|
|
Enable hierarchy output.
|
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|
|
2009-08-04 16:24:41 +08:00
|
|
|
INTERACTIVE PROMPTING KEYS
|
|
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|
|
--------------------------
|
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[d]::
|
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|
Display refresh delay.
|
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[e]::
|
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Number of entries to display.
|
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[E]::
|
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|
Event to display when multiple counters are active.
|
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[f]::
|
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|
|
Profile display filter (>= hit count).
|
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|
[F]::
|
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|
Annotation display filter (>= % of total).
|
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|
[s]::
|
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|
|
Annotate symbol.
|
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|
[S]::
|
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|
|
Stop annotation, return to full profile display.
|
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|
[z]::
|
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|
|
Toggle event count zeroing across display updates.
|
|
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|
[qQ]::
|
|
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|
Quit.
|
|
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|
|
Pressing any unmapped key displays a menu, and prompts for input.
|
2009-04-20 21:52:29 +08:00
|
|
|
|
2015-04-22 14:33:45 +08:00
|
|
|
include::callchain-overhead-calculation.txt[]
|
2009-04-20 21:52:29 +08:00
|
|
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|
|
|
|
|
SEE ALSO
|
|
|
|
|
--------
|
2014-03-04 08:06:42 +08:00
|
|
|
linkperf:perf-stat[1], linkperf:perf-list[1], linkperf:perf-report[1]
|