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



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

SYNOPSIS
       perf sched {record|latency|map|replay|script}

DESCRIPTION
       There are five variants of perf sched:

           ?perf sched record <command>? to record the scheduling events
           of an arbitrary workload.

           ?perf sched latency? to report the per task scheduling latencies
           and other scheduling properties of the workload.

           ?perf sched script? to see a detailed trace of the workload that
            was recorded (aliased to ?perf script? for now).

           ?perf sched replay? to simulate the workload that was recorded
           via perf sched record. (this is done by starting up mockup threads
           that mimic the workload based on the events in the trace. These
           threads can then replay the timings (CPU runtime and sleep patterns)
           of the workload as it occurred when it was recorded - and can repeat
           it a number of times, measuring its performance.)

           ?perf sched map? to print a textual context-switching outline of
           workload captured via perf sched record.  Columns stand for
           individual CPUs, and the two-letter shortcuts stand for tasks that
           are running on a CPU. A ?*? denotes the CPU that had the event, and
           a dot signals an idle CPU.

OPTIONS
       -i, --input=<file>
           Input file name. (default: perf.data unless stdin is a fifo)

       -v, --verbose
           Be more verbose. (show symbol address, etc)

       -D, --dump-raw-trace=
           Display verbose dump of the sched data.

SEE ALSO
       perf-record(1)



perf                              06/22/2017                     PERF-SCHED(1)