Messages in this thread | | | Date | Fri, 10 Jul 2020 21:35:58 +0800 | From | Changbin Du <> | Subject | Re: [PATCH v3 00/17] perf: ftrace enhancement |
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On Wed, Jul 08, 2020 at 02:39:59PM -0300, Arnaldo Carvalho de Melo wrote: > Em Thu, Jul 09, 2020 at 12:45:48AM +0800, Changbin Du escreveu: > > Here is a glance of all ftrace functions with this serias: > > > > $ sudo perf ftrace -h > > > Usage: perf ftrace [<options>] [<command>] > > or: perf ftrace [<options>] -- <command> [<options>] > > > > -a, --all-cpus system-wide collection from all CPUs > > -C, --cpu <cpu> list of cpus to monitor > > -d, --delay <n> ms to wait before starting tracing after program start > > -D, --graph-depth <n> > > Max depth for function graph tracer (This option is deprecated) > > -F, --funcs Show available functions to filter > > -G, --graph-funcs <func> > > trace given functions using function_graph tracer > > -g, --nograph-funcs <func> > > Set nograph filter on given functions > > -m, --buffer-size <size> > > size of per cpu buffer > > -N, --notrace-funcs <func> > > do not trace given functions > > -p, --pid <pid> trace on existing process id > > -t, --tid <tid> trace on existing thread id (exclusive to --pid) > > -T, --trace-funcs <func> > > trace given functions using function tracer > > -t, --tracer <tracer> > > tracer to use: function or function_graph (This option is deprecated) > > -v, --verbose be more verbose > > --func-opts <options> > > function tracer options, available options: call-graph,irq-info > > --graph-opts <options> > > graph tracer options, available options: nosleep-time,noirqs,verbose,thresh=<n>,depth=<n> > > --inherit trace children processes > > > > v3: > > o add --func-opts and --graph-opts to set tracer specific options. > > o support units as a suffix for option '-m/--buffer-size'. > > Thanks for working on this! -d/--delay: > > [acme@quaco perf]$ perf record -h delay > > Usage: perf record [<options>] [<command>] > or: perf record [<options>] -- <command> [<options>] > > -D, --delay <n> ms to wait before starting measurement after program start > > [acme@quaco perf]$ > > [acme@quaco perf]$ perf stat -h --delay > > Usage: perf stat [<options>] [<command>] > > -D, --delay <n> ms to wait before starting measurement after program start > > [acme@quaco perf]$ > > [acme@quaco perf]$ perf trace -h -D > > Usage: perf trace [<options>] [<command>] > or: perf trace [<options>] -- <command> [<options>] > or: perf trace record [<options>] [<command>] > or: perf trace record [<options>] -- <command> [<options>] > > -D, --delay <n> ms to wait before starting measurement after program start > > Perhaps we can move --graph-depth to --graph-opts and make -D/--delay be > just like with 'perf record', 'perf stat' and 'perf trace'? > > Will be super nice if one can go from: > > perf stat --delay 100 workload > > to see the default set of counters to: > > perf ftrace --delay 100 workload > > to get the ftrace output for that. > > Ditto seeing the syscalls strace-like with: > > perf trace --delay 100 workload > No problem. Now -D/--graph-depth is moved to --graph-opts.
> Regards, > > - Arnaldo
-- Cheers, Changbin Du
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