kernel/tools/perf/Documentation/tips.txt, branch linux-6.2.y

perf tools: Fix typos / broken sentences

2019-07-02T19:08:16Z

- Fix a typo in the man page - Fix a tip that doesn't make any sense. Signed-off-by: Andi Kleen Cc: Jiri Olsa Link: http://lkml.kernel.org/r/20190628220900.13741-1-andi@firstfloor.org Signed-off-by: Arnaldo Carvalho de Melo

perf tools: Add some new tips describing the new options

2019-03-11T19:33:19Z

Signed-off-by: Andi Kleen Acked-by: Jiri Olsa Link: http://lkml.kernel.org/r/20190311144502.15423-9-andi@firstfloor.org Signed-off-by: Arnaldo Carvalho de Melo

perf c2c: Add a tip about cacheline events

2017-12-05T18:43:55Z

Signed-off-by: Sangwon Hong Cc: Jiri Olsa Cc: Namhyung Kim Link: http://lkml.kernel.org/r/1512188201-14109-1-git-send-email-qpakzk@gmail.com Signed-off-by: Arnaldo Carvalho de Melo

perf buildid-cache: Document for Node.js USDT

2017-11-29T21:18:01Z

Add a tip for Node.js USDT(User-Level Statically Defined Tracing) probes in tips.txt Signed-off-by: Hansuk Hong Cc: Jiri Olsa Cc: Namhyung Kim Link: http://lkml.kernel.org/r/20171123160546.9722-1-flavono123@gmail.com Signed-off-by: Arnaldo Carvalho de Melo

perf tools: Fix spelling mistakes

2017-05-04T12:59:53Z

Mostly in the documentation. Signed-off-by: Kim Phillips Cc: Alexander Shishkin Cc: Peter Zijlstra Link: http://lkml.kernel.org/r/20170503131350.cebeecd8bd0f2968417626ab@arm.com [ Fix spelling of "parameter" in one of the spell-checked lines ] Signed-off-by: Arnaldo Carvalho de Melo

scripts/spelling.txt: add "an user" pattern and fix typo instances

2017-02-28T02:43:46Z

Fix typos and add the following to the scripts/spelling.txt: an user||a user an userspace||a userspace I also added "userspace" to the list since it is a common word in Linux. I found some instances for "an userfaultfd", but I did not add it to the list. I felt it is endless to find words that start with "user" such as "userland" etc., so must draw a line somewhere. Link: http://lkml.kernel.org/r/1481573103-11329-4-git-send-email-yamada.masahiro@socionext.com Signed-off-by: Masahiro Yamada Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

perf top/report: Add tips about a list option

2016-10-05T22:51:53Z

Add two tips that describe --list option of config sub-command and explain how to choose particular config file location. Signed-off-by: Nambong Ha Cc: Jiri Olsa Cc: Namhyung Kim Cc: Peter Zijlstra Cc: Taeung Song Link: http://lkml.kernel.org/r/1475191562-3240-1-git-send-email-over3025@gmail.com Signed-off-by: Arnaldo Carvalho de Melo

perf report/top: Add a tip about system-wide collection from all CPUs

2016-10-05T22:50:25Z

Signed-off-by: Donghyun Kim Cc: Jiri Olsa Cc: Namhyung Kim Cc: Peter Zijlstra Cc: Taeung Song Link: http://lkml.kernel.org/r/1475187357-21882-1-git-send-email-dongdong9335@gmail.com Signed-off-by: Arnaldo Carvalho de Melo

perf report/top: Add a tip about source line numbers with overhead

2016-10-05T22:47:55Z

There is a existing tip as below. If you have debuginfo enabled, try: perf report -s sym,srcline However this tip only describe a condition to use --sort sym,scrline options. So there is lack of explanation in the tip. I think that it would be better to add a tip that exactly explains the feature of --sort srcline. Signed-off-by: Seonyoung Kim Cc: Jiri Olsa Cc: Namhyung Kim Cc: Peter Zijlstra Cc: Taeung Song Link: http://lkml.kernel.org/r/1475194602-5596-1-git-send-email-adamas0414@gmail.com Signed-off-by: Arnaldo Carvalho de Melo

perf report: Add --hierarchy option

2016-02-24T23:21:15Z

The --hierarchy option is to show output in hierarchy mode. It extends folding/unfolding in the TUI and GTK browsers to support sort items as well as callchains. Users can toggle the items to see the performance result at wanted level. $ perf report --hierarchy --tui Overhead Command / Shared Object / Symbol -------------------------------------------------- + 32.96% gnome-shell - 15.11% swapper - 14.97% [kernel.vmlinux] 6.82% [k] intel_idle 0.66% [k] menu_select 0.43% [k] __hrtimer_start_range_ns ... Signed-off-by: Namhyung Kim Acked-by: Pekka Enberg Cc: Andi Kleen Cc: David Ahern Cc: Jiri Olsa Cc: Peter Zijlstra Cc: Stephane Eranian Cc: Wang Nan Link: http://lkml.kernel.org/r/1456326830-30456-17-git-send-email-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo