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

From: Arnaldo Carvalho de Melo
Date: Wed Oct 15 2014 - 14:50:42 EST


Em Tue, Oct 07, 2014 at 03:16:19PM +0400, Alexander Yarygin escreveu:
>
> Hello,
>
> Namhyung Kim <namhyung@xxxxxxxxxx> 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@xxxxxxxxxxxxxxxxxx>
> > Signed-off-by: Namhyung Kim <namhyung@xxxxxxxxxx>
> > ---
> > 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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