perf/Documentation/perf-timechart.txt

1 perf-timechart(1)
5 ----
6 perf-timechart - Tool to visualize total system behavior during a workload
9 --------
14 -----------
19   and CPU events (task switches, running times, CPU power states, etc),
20   but it's possible to record IO (disk, network) activity using -I argument.
24   on the events in the perf.data file, timechart will contain scheduler/cpu
30   There are also poll bars which show how much time application spent
34 -----------------
35 -o::
36 --output=::
38 -i::
39 --input=::
41 -w::
42 --width=::
44 -P::
45 --power-only::
46         Only output the CPU power section of the diagram
47 -T::
48 --tasks-only::
50 -p::
51 --process::
53 -f::
54 --force::
56 --symfs=<directory>::
58 -n::
59 --proc-num::
61 -t::
62 --topology::
64 --highlight=<duration_nsecs|task_name>::
67 	as number of nanoseconds. If non-numeric string is given it's
69 --io-skip-eagain::
71 --io-min-time=<nsecs>::
72 	Draw small events as if they lasted min-time. Useful when you need
73 	to see very small and fast IO. It's possible to specify ms or us
74 	suffix to specify time in milliseconds or microseconds.
75 	Default value is 1ms.
76 --io-merge-dist=<nsecs>::
77 	Merge events that are merge-dist nanoseconds apart.
78 	Reduces number of figures on the SVG and makes it more render-friendly.
79 	It's possible to specify ms or us suffix to specify time in
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) recording
99 --------
110 Record system-wide timechart:
116   $ perf timechart --highlight gcc
118 Record system-wide IO events:
120   $ perf timechart record -I
127 --------
128 linkperf:perf-record[1]