blob: fc46c0b40f6e431bd5124885544b5827a96234c8 (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
|
perf-record(1)
==============
NAME
----
perf-record - Run a command and record its profile into perf.data
SYNOPSIS
--------
[verse]
'perf record' [-e <EVENT> | --event=EVENT] [-l] [-a] <command>
'perf record' [-e <EVENT> | --event=EVENT] [-l] [-a] -- <command> [<options>]
DESCRIPTION
-----------
This command runs a command and gathers a performance counter profile
from it, into perf.data - without displaying anything.
This file can then be inspected later on, using 'perf report'.
OPTIONS
-------
<command>...::
Any command you can specify in a shell.
-e::
--event=::
Select the PMU event. Selection can be:
- a symbolic event name (use 'perf list' to list all events)
- a raw PMU event (eventsel+umask) in the form of rNNN where NNN is a
hexadecimal event descriptor.
- a hardware breakpoint event in the form of '\mem:addr[:access]'
where addr is the address in memory you want to break in.
Access is the memory access type (read, write, execute) it can
be passed as follows: '\mem:addr[:[r][w][x]]'.
If you want to profile read-write accesses in 0x1000, just set
'mem:0x1000:rw'.
-a::
System-wide collection.
-l::
Scale counter values.
-p::
--pid=::
Record events on existing pid.
-r::
--realtime=::
Collect data with this RT SCHED_FIFO priority.
-A::
--append::
Append to the output file to do incremental profiling.
-f::
--force::
Overwrite existing data file.
-c::
--count=::
Event period to sample.
-o::
--output=::
Output file name.
-i::
--inherit::
Child tasks inherit counters.
-F::
--freq=::
Profile at this frequency.
-m::
--mmap-pages=::
Number of mmap data pages.
-g::
--call-graph::
Do call-graph (stack chain/backtrace) recording.
-v::
--verbose::
Be more verbose (show counter open errors, etc).
-s::
--stat::
Per thread counts.
-d::
--data::
Sample addresses.
-n::
--no-samples::
Don't sample.
-R::
--raw-samples::
Collect raw sample records from all opened counters (typically for tracepoint counters).
SEE ALSO
--------
linkperf:perf-stat[1], linkperf:perf-list[1]
|
