Re: [PATCH 2/2] perf sched: Add documentation for timehist options
On 12/2/13, 12:41 AM, Namhyung Kim wrote: Hi David, On Sun, 1 Dec 2013 17:23:15 -0700, David Ahern wrote: Add entry to perf-sched documentation for timehist command and its options. [SNIP] +--max-stack:: +Set the stack depth limit when showing the callchains. Default: 127 Isn't it 5 instead of 127? drat. missed that one. David -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: [PATCH 2/2] perf sched: Add documentation for timehist options
* Srikar Dronamraju wrote:
> * David Ahern [2013-12-01 17:23:15]:
>
> > Add entry to perf-sched documentation for timehist command and its
> > options.
> >
> > v2: Addressed comments by Namhyung
> >
> > Signed-off-by: David Ahern
> > Cc: Ingo Molnar
> > Cc: Frederic Weisbecker
> > Cc: Peter Zijlstra
> > Cc: Mike Galbraith
> > Cc: Jiri Olsa
> > Cc: Namhyung Kim
> > Cc: Stephane Eranian
> > Cc: Pekka Enberg
> > ---
> > tools/perf/Documentation/perf-sched.txt | 61
> > -
> > 1 file changed, 60 insertions(+), 1 deletion(-)
> >
> > diff --git a/tools/perf/Documentation/perf-sched.txt
> > b/tools/perf/Documentation/perf-sched.txt
> > index 8ff4df956951..e7bb19fcdbff 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:
>
> Nit: There are six variants now.
Trick: it might make sense to use a more future-proof phrase:
There are several variants of perf sched:
;-)
Thanks,
Ingo
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Re: [PATCH 2/2] perf sched: Add documentation for timehist options
Hi David, On Sun, 1 Dec 2013 17:23:15 -0700, David Ahern wrote: > Add entry to perf-sched documentation for timehist command and its > options. [SNIP] > +--max-stack:: > +Set the stack depth limit when showing the callchains. Default: 127 Isn't it 5 instead of 127? Thanks, Namhyung -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: [PATCH 2/2] perf sched: Add documentation for timehist options
* David Ahern [2013-12-01 17:23:15]:
> Add entry to perf-sched documentation for timehist command and its
> options.
>
> v2: Addressed comments by Namhyung
>
> Signed-off-by: David Ahern
> Cc: Ingo Molnar
> Cc: Frederic Weisbecker
> Cc: Peter Zijlstra
> Cc: Mike Galbraith
> Cc: Jiri Olsa
> Cc: Namhyung Kim
> Cc: Stephane Eranian
> Cc: Pekka Enberg
> ---
> tools/perf/Documentation/perf-sched.txt | 61
> -
> 1 file changed, 60 insertions(+), 1 deletion(-)
>
> diff --git a/tools/perf/Documentation/perf-sched.txt
> b/tools/perf/Documentation/perf-sched.txt
> index 8ff4df956951..e7bb19fcdbff 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:
Nit: There are six variants now.
--
Thanks and Regards
Srikar Dronamraju
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[PATCH 2/2] perf sched: Add documentation for timehist options
Add entry to perf-sched documentation for timehist command and its
options.
v2: Addressed comments by Namhyung
Signed-off-by: David Ahern
Cc: Ingo Molnar
Cc: Frederic Weisbecker
Cc: Peter Zijlstra
Cc: Mike Galbraith
Cc: Jiri Olsa
Cc: Namhyung Kim
Cc: Stephane Eranian
Cc: Pekka Enberg
---
tools/perf/Documentation/perf-sched.txt | 61 -
1 file changed, 60 insertions(+), 1 deletion(-)
diff --git a/tools/perf/Documentation/perf-sched.txt
b/tools/perf/Documentation/perf-sched.txt
index 8ff4df956951..e7bb19fcdbff 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 +55,60 @@ OPTIONS
--dump-raw-trace=::
Display verbose dump of the sched data.
+TIMEHIST OPTIONS
+
+-k::
+--vmlinux=::
+vmlinux pathname
+
+--kallsyms=::
+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::
+--exclude-sym::
+Symbols to skip in backtrace. Useful to compact repetitive or
+uninteresting frames to pull more useful frames into view.
+
+--symfs=::
+Look for files with symbols relative to this directory.
+
+-V::
+--cpu-visual::
+Add a visual that better emphasizes activity by cpu. Idle times
+are denoted with 'i'; schedule events with an 's'.
+
SEE ALSO
linkperf:perf-record[1]
--
1.8.3.4 (Apple Git-47)
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