linux-kernel - Re: [RFC/PATCH] perf report: Show random usage tip on the help line

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Message-ID: <20160105205246.GJ15533@two.firstfloor.org>
Date:	Tue, 5 Jan 2016 21:52:46 +0100
From:	Andi Kleen <andi@...stfloor.org>
To:	Namhyung Kim <namhyung@...nel.org>
Cc:	"Wangnan (F)" <wangnan0@...wei.com>,
	Arnaldo Carvalho de Melo <acme@...nel.org>,
	Ingo Molnar <mingo@...nel.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Jiri Olsa <jolsa@...hat.com>,
	LKML <linux-kernel@...r.kernel.org>,
	David Ahern <dsahern@...il.com>,
	Stephane Eranian <eranian@...gle.com>,
	Andi Kleen <andi@...stfloor.org>,
	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>
Subject: Re: [RFC/PATCH] perf report: Show random usage tip on the help line

> Btw, does anyone have some tips to add? :)

Use perf script to show individual samples
Use perf report --percent-limit 5 to only show entires above 5%
Use perf record -b -g / perf report --branch-history to show branch events
Use perf record -b / perf report to show branch mispredictions
Use perf report -M intel to show Intel style assembler 
Use perf report --sort srcfile to sort by source file
Use perf report --sort symbol,srcline to sort by source line
Use perf record -e '{cycles,cache-misses}:S' / perf report --group to associate events
Use perf mem record / perf mem report for memory address profiling
Use perf stat -I 1000 to count events in intervals
Use perf stat -I 1000 -x, to count events and output as CSV
Use perf timechart record / report to generate high level time line
Use perf probe --add kfunc / perf record -e kfunc to trace a custom trace point

You may also want to adapt some of Brendan's one liners:

http://www.brendangregg.com/perf.html

-Andi
-- 
ak@...ux.intel.com -- Speaking for myself only.
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