linux/tools/perf/Documentation/perf-sched.txt
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   1perf-sched(1)
   2==============
   3
   4NAME
   5----
   6perf-sched - Tool to trace/measure scheduler properties (latencies)
   7
   8SYNOPSIS
   9--------
  10[verse]
  11'perf sched' {record|latency|map|replay|trace}
  12
  13DESCRIPTION
  14-----------
  15There are five variants of perf sched:
  16
  17  'perf sched record <command>' to record the scheduling events
  18  of an arbitrary workload.
  19
  20  'perf sched latency' to report the per task scheduling latencies
  21  and other scheduling properties of the workload.
  22
  23  'perf sched trace' to see a detailed trace of the workload that
  24  was recorded.
  25
  26  'perf sched replay' to simulate the workload that was recorded
  27  via perf sched record. (this is done by starting up mockup threads
  28  that mimic the workload based on the events in the trace. These
  29  threads can then replay the timings (CPU runtime and sleep patterns)
  30  of the workload as it occurred when it was recorded - and can repeat
  31  it a number of times, measuring its performance.)
  32
  33  'perf sched map' to print a textual context-switching outline of
  34  workload captured via perf sched record.  Columns stand for
  35  individual CPUs, and the two-letter shortcuts stand for tasks that
  36  are running on a CPU. A '*' denotes the CPU that had the event, and
  37  a dot signals an idle CPU.
  38
  39OPTIONS
  40-------
  41-i::
  42--input=<file>::
  43        Input file name. (default: perf.data)
  44
  45-v::
  46--verbose::
  47        Be more verbose. (show symbol address, etc)
  48
  49-D::
  50--dump-raw-trace=::
  51        Display verbose dump of the sched data.
  52
  53SEE ALSO
  54--------
  55linkperf:perf-record[1]
  56