linux-kernel - Re: [PATCH 3/3] perf kvm: Print kvm specific --help output

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Date:	Wed, 15 Oct 2014 15:50:33 -0300
From:	Arnaldo Carvalho de Melo <acme@...nel.org>
To:	Alexander Yarygin <yarygin@...ux.vnet.ibm.com>
Cc:	Namhyung Kim <namhyung@...nel.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Ingo Molnar <mingo@...nel.org>,
	Paul Mackerras <paulus@...ba.org>,
	Namhyung Kim <namhyung.kim@....com>,
	LKML <linux-kernel@...r.kernel.org>,
	Jiri Olsa <jolsa@...hat.com>, David Ahern <dsahern@...il.com>
Subject: Re: [PATCH 3/3] perf kvm: Print kvm specific --help output

Em Tue, Oct 07, 2014 at 03:16:19PM +0400, Alexander Yarygin escreveu:
> 
> Hello,
> 
> Namhyung Kim <namhyung@...nel.org> writes:
> 
> > The 'perf kvm stat record' tool is an alias of 'perf record' with
> > predefined kvm related options. All options that passed to 'perf kvm
> > stat record' are processed by the 'perf record' tool. So, 'perf kvm
> > stat record --help' prints help of usage for the 'perf record'
> > command. There are a few options useful for 'perf kvm stat record',
> > the rest either break kvm related output or don't change it.
> >
> > Let's print safe for 'perf kvm stat record' options in addition to
> > general 'perf record' --help output.
> 
> We probably want s/in addition to general 'perf record' --help output//

So is this settled? Can I apply it with an Acked-by: Alexander?

- Arnaldo
 
> > With this patch, new output looks like below:
> >
> >   $ perf kvm stat record -h
> >
> >    usage: perf kvm stat record [<options>]
> >
> >       -p, --pid <pid>       record events on existing process id
> >       -t, --tid <tid>       record events on existing thread id
> >       -r, --realtime <n>    collect data with this RT SCHED_FIFO priority
> >           --no-buffering    collect data without buffering
> >       -a, --all-cpus        system-wide collection from all CPUs
> >       -C, --cpu <cpu>       list of cpus to monitor
> >       -c, --count <n>       event period to sample
> >       -o, --output <file>   output file name
> >       -i, --no-inherit      child tasks do not inherit counters
> >       -m, --mmap-pages <pages>
> >                             number of mmap data pages
> >       -v, --verbose         be more verbose (show counter open errors, etc)
> >       -q, --quiet           don't print any message
> >       -s, --stat            per thread counts
> >       -D, --delay <n>       ms to wait before starting measurement after program start
> >       -u, --uid <user>      user to profile
> >           --per-thread      use per-thread mmaps
> >
> >   $ perf kvm stat record -n sleep 1
> >     Error: switch `n' is not usable
> >
> >    usage: perf kvm stat record [<options>]
> >
> > Cc: Alexander Yarygin <yarygin@...ux.vnet.ibm.com>
> > Signed-off-by: Namhyung Kim <namhyung@...nel.org>
> > ---
> >  tools/perf/builtin-kvm.c | 25 +++++++++++++++++++++++++
> >  1 file changed, 25 insertions(+)
> >
> > diff --git a/tools/perf/builtin-kvm.c b/tools/perf/builtin-kvm.c
> > index 460a4ce9c044..c029d0fdc93e 100644
> > --- a/tools/perf/builtin-kvm.c
> > +++ b/tools/perf/builtin-kvm.c
> > @@ -1132,6 +1132,10 @@ kvm_events_record(struct perf_kvm_stat *kvm, int argc, const char **argv)
> >  		"-m", "1024",
> >  		"-c", "1",
> >  	};
> > +	const char * const kvm_stat_record_usage[] = {
> > +		"perf kvm stat record [<options>]",
> > +		NULL
> > +	};
> >  	const char * const *events_tp;
> >  	events_tp_size = 0;
> >
> > @@ -1159,6 +1163,27 @@ kvm_events_record(struct perf_kvm_stat *kvm, int argc, const char **argv)
> >  	for (j = 1; j < (unsigned int)argc; j++, i++)
> >  		rec_argv[i] = argv[j];
> >
> > +	set_option_flag(record_options, 'e', "event", PARSE_OPT_HIDDEN);
> > +	set_option_flag(record_options, 0, "filter", PARSE_OPT_HIDDEN);
> > +	set_option_flag(record_options, 'R', "raw-samples", PARSE_OPT_HIDDEN);
> > +
> > +	set_option_flag(record_options, 'F', "freq", PARSE_OPT_DISABLED);
> > +	set_option_flag(record_options, 0, "group", PARSE_OPT_DISABLED);
> > +	set_option_flag(record_options, 'g', NULL, PARSE_OPT_DISABLED);
> > +	set_option_flag(record_options, 0, "call-graph", PARSE_OPT_DISABLED);
> > +	set_option_flag(record_options, 'd', "data", PARSE_OPT_DISABLED);
> > +	set_option_flag(record_options, 'T', "timestamp", PARSE_OPT_DISABLED);
> > +	set_option_flag(record_options, 'P', "period", PARSE_OPT_DISABLED);
> > +	set_option_flag(record_options, 'n', "no-samples", PARSE_OPT_DISABLED);
> > +	set_option_flag(record_options, 'N', "no-buildid-cache", PARSE_OPT_DISABLED);
> > +	set_option_flag(record_options, 'B', "no-buildid", PARSE_OPT_DISABLED);
> > +	set_option_flag(record_options, 'G', "cgroup", PARSE_OPT_DISABLED);
> > +	set_option_flag(record_options, 'b', "branch-any", PARSE_OPT_DISABLED);
> > +	set_option_flag(record_options, 'j', "branch-filter", PARSE_OPT_DISABLED);
> > +	set_option_flag(record_options, 'W', "weight", PARSE_OPT_DISABLED);
> > +	set_option_flag(record_options, 0, "transaction", PARSE_OPT_DISABLED);
> > +
> > +	record_usage = kvm_stat_record_usage;
> >  	return cmd_record(i, rec_argv, NULL);
> >  }
> 
> 
> Otherwise it works for me.
> Thanks!
--
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