1PERF-SCHED(1)                     perf Manual                    PERF-SCHED(1)
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NAME

6       perf-sched - Tool to trace/measure scheduler properties (latencies)
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SYNOPSIS

9       perf sched {record|latency|map|replay|script}
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DESCRIPTION

12       There are five variants of perf sched:
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14           ´perf sched record <command>´ to record the scheduling events
15           of an arbitrary workload.
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17           ´perf sched latency´ to report the per task scheduling latencies
18           and other scheduling properties of the workload.
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20           ´perf sched script´ to see a detailed trace of the workload that
21            was recorded (aliased to ´perf script´ for now).
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23           ´perf sched replay´ to simulate the workload that was recorded
24           via perf sched record. (this is done by starting up mockup threads
25           that mimic the workload based on the events in the trace. These
26           threads can then replay the timings (CPU runtime and sleep patterns)
27           of the workload as it occurred when it was recorded - and can repeat
28           it a number of times, measuring its performance.)
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30           ´perf sched map´ to print a textual context-switching outline of
31           workload captured via perf sched record.  Columns stand for
32           individual CPUs, and the two-letter shortcuts stand for tasks that
33           are running on a CPU. A ´*´ denotes the CPU that had the event, and
34           a dot signals an idle CPU.
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OPTIONS

37       -i, --input=<file>
38           Input file name. (default: perf.data unless stdin is a fifo)
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40       -v, --verbose
41           Be more verbose. (show symbol address, etc)
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43       -D, --dump-raw-trace=
44           Display verbose dump of the sched data.
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SEE ALSO

47       perf-record(1)
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51perf                              06/18/2019                     PERF-SCHED(1)
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