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.

OPTIONS FOR PERF SCHED MAP

--compact
    Show only CPUs with activity. Helps visualizing on high core count systems.

--cpus
    Show just entries with activities for the given CPUs.

--color-cpus
    Highlight the given cpus.

--color-pids
    Highlight the given pids.

SEE ALSO

perf-record(1)