1 perf-timechart(1)
2 =================
3
4 NAME
5 ----
6 perf-timechart - Tool to visualize total syste
7
8 SYNOPSIS
9 --------
10 [verse]
11 'perf timechart' [<timechart options>] {record
12
13 DESCRIPTION
14 -----------
15 There are two variants of perf timechart:
16
17 'perf timechart record <command>' to record
18 of an arbitrary workload. By default timecha
19 and CPU events (task switches, running times
20 but it's possible to record IO (disk, networ
21
22 'perf timechart' to turn a trace into a Scal
23 that can be viewed with popular SVG viewers
24 on the events in the perf.data file, timecha
25 events or IO events.
26
27 In IO mode, every bar has two charts: upper
28 Upper bar shows incoming events (disk reads,
29 Lower bar shows outgoing events (disk writes
30 There are also poll bars which show how much
31 in poll/epoll/select syscalls.
32
33 TIMECHART OPTIONS
34 -----------------
35 -o::
36 --output=::
37 Select the output file (default: outpu
38 -i::
39 --input=::
40 Select the input file (default: perf.d
41 -w::
42 --width=::
43 Select the width of the SVG file (defa
44 -P::
45 --power-only::
46 Only output the CPU power section of t
47 -T::
48 --tasks-only::
49 Don't output processor state transitio
50 -p::
51 --process::
52 Select the processes to display, by na
53 -f::
54 --force::
55 Don't complain, do it.
56 --symfs=<directory>::
57 Look for files with symbols relative t
58 -n::
59 --proc-num::
60 Print task info for at least given num
61 -t::
62 --topology::
63 Sort CPUs according to topology.
64 --highlight=<duration_nsecs|task_name>::
65 Highlight tasks (using different color
66 duration or tasks with given name. If
67 as number of nanoseconds. If non-numer
68 interpreted as task name.
69 --io-skip-eagain::
70 Don't draw EAGAIN IO events.
71 --io-min-time=<nsecs>::
72 Draw small events as if they lasted mi
73 to see very small and fast IO. It's po
74 suffix to specify time in milliseconds
75 Default value is 1ms.
76 --io-merge-dist=<nsecs>::
77 Merge events that are merge-dist nanos
78 Reduces number of figures on the SVG a
79 It's possible to specify ms or us suff
80 milliseconds or microseconds.
81 Default value is 1us.
82
83 RECORD OPTIONS
84 --------------
85 -P::
86 --power-only::
87 Record only power-related events
88 -T::
89 --tasks-only::
90 Record only tasks-related events
91 -I::
92 --io-only::
93 Record only io-related events
94 -g::
95 --callchain::
96 Do call-graph (stack chain/backtrace)
97
98 EXAMPLES
99 --------
100
101 $ perf timechart record git pull
102
103 [ perf record: Woken up 13 times to write da
104 [ perf record: Captured and wrote 4.253 MB p
105
106 $ perf timechart
107
108 Written 10.2 seconds of trace to output.svg.
109
110 Record system-wide timechart:
111
112 $ perf timechart record
113
114 then generate timechart and highlight 'gcc'
115
116 $ perf timechart --highlight gcc
117
118 Record system-wide IO events:
119
120 $ perf timechart record -I
121
122 then generate timechart:
123
124 $ perf timechart
125
126 SEE ALSO
127 --------
128 linkperf:perf-record[1]
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