Linux and UNIX Man Pages

Linux & Unix Commands - Search Man Pages

CentOS 7.0 - man page for perf-sched (centos section 1)

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

perf-sched - Tool to trace/measure scheduler properties (latencies)
perf sched {record|latency|map|replay|script}
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.
-i, --input=<file> Input file name. (default: 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.
perf-record(1) perf 06/30/2014 PERF-SCHED(1)