Messages in this thread | | | Date | Fri, 8 Jan 2016 09:06:35 +0100 | From | Ingo Molnar <> | Subject | Re: [RFC/PATCH v3] perf report: Show random usage tip on the help line |
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* Ingo Molnar <mingo@kernel.org> wrote:
> > * Namhyung Kim <namhyung@kernel.org> wrote: > > > Currently perf report only shows a help message "For a higher level > > overview, try: perf report --sort comm,dso" unconditionally (even if > > the sort keys were used). Add more help tips and show randomly. > > > > Load tips from ${prefix}/share/doc/perf-tip/tips.txt file. > > > +++ b/tools/perf/Documentation/tips.txt > > @@ -0,0 +1,14 @@ > > +For a higher level overview, try: perf report --sort comm,dso > > +Group related events with: perf record -e '{cycles,instructions}:S' > > +Compare performance results with: perf diff [<old file> <new file>] > > +Boolean options have negative forms like: perf report --no-children > > +Customize output of perf script with: perf script -F event,ip,sym > > +Generate a script for your data: perf script -g <lang> > > +Save output of perf stat using: perf stat record > > +Create archive of data to see it on other machine: perf archive > > +Search options using a keyword: perf report -h <keyword> > > +Use parent filter to see specific call path: perf report -p <regex>
We could also include a more basic tip that suggests call graph recording? Most people don't know about it I think.
Thanks,
Ingo
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