Messages in this thread Patch in this message |  | | From | David Ahern <> | Subject | [PATCH 8/8] perf sched : Add documentation for timehist options | Date | Mon, 18 Nov 2013 13:32:51 -0700 |
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Add entry to perf-sched documentation for timehist command and its options.
Signed-off-by: David Ahern <dsahern@gmail.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Mike Galbraith <efault@gmx.de> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Stephane Eranian <eranian@google.com> Cc: Pekka Enberg <penberg@kernel.org> --- tools/perf/Documentation/perf-sched.txt | 60 ++++++++++++++++++++++++++++++++- 1 file changed, 59 insertions(+), 1 deletion(-)
diff --git a/tools/perf/Documentation/perf-sched.txt b/tools/perf/Documentation/perf-sched.txt index 8ff4df956951..83fac8b86f52 100644 --- a/tools/perf/Documentation/perf-sched.txt +++ b/tools/perf/Documentation/perf-sched.txt @@ -8,7 +8,7 @@ perf-sched - Tool to trace/measure scheduler properties (latencies) SYNOPSIS -------- [verse] -'perf sched' {record|latency|map|replay|script} +'perf sched' {record|latency|map|replay|script|timehist} DESCRIPTION ----------- @@ -36,6 +36,11 @@ There are five variants of perf sched: are running on a CPU. A '*' denotes the CPU that had the event, and a dot signals an idle CPU. + 'perf sched timehist' to show context-switching analysis with times + between schedule-in, schedule delay, and run time. If callchains are + present stack trace is dumped at the end of the line. A summary of + run times can be shown as well. + OPTIONS ------- -i:: @@ -50,6 +55,59 @@ OPTIONS --dump-raw-trace=:: Display verbose dump of the sched data. +TIMEHIST OPTIONS +---------------- +-k:: +--vmlinux=<file>:: + vmlinux pathname + +--kallsyms=<file>:: + kallsyms pathname + +-s:: +--summary:: + Show only a summary of scheduling by thread with min, max, and average + run times (in sec) and relative stddev. + +-S:: +--with-summary:: + Show all scheduling events followed by a summary by thread with min, + max, and average run times (in sec) and relative stddev. + +-w:: +--wakeups:: + Show wakeup events. + +-c:: +--comms=:: + Only show events for given comms (comma separated list) + +-p:: +--pid=:: + Only show events for given process ID (comma separated list). + +-t:: +--tid=:: + Only show events for given thread ID (comma separated list). + +--call-graph:: + Display call chains. Default is on. Use --no-call-graph to suppress + +--max-stack:: + Set the stack depth limit when showing the callchains. Default: 127 + +-x:: +--excl:: + Symbols to skip in backtrace. Useful to compact repetitive or + uninteresting frames to pull more useful frames into view. + +--symfs=<directory>:: + Look for files with symbols relative to this directory. + +-V:: +--cpu-visual:: + Add a visual for following events by cpu + SEE ALSO -------- linkperf:perf-record[1] -- 1.8.3.4 (Apple Git-47)
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