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- perf-sched(1)
- ==============
- NAME
- ----
- perf-sched - Tool to trace/measure scheduler properties (latencies)
- SYNOPSIS
- --------
- [verse]
- '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
- --------
- linkperf:perf-record[1]
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