On Tue, Sep 26, 2017 at 06:57:58PM +0800, Jin Yao wrote: > In perf record, it's walked on all samples yet. So it's very easy to get > the first/last samples and save the time to perf file header via the > function write_sample_time(). > > In later, perf report/script will fetch the time from perf file header. > > Signed-off-by: Jin Yao <[email protected]> > --- > tools/perf/builtin-record.c | 17 +++++++++++++++++ > 1 file changed, 17 insertions(+) > > diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c > index 9b379f3..3428633 100644 > --- a/tools/perf/builtin-record.c > +++ b/tools/perf/builtin-record.c > @@ -80,6 +80,8 @@ struct record { > bool timestamp_filename; > struct switch_output switch_output; > unsigned long long samples; > + u64 first_sample_time; > + u64 last_sample_time;
so we have those 2 u64 already in 3 structs: evlist, session and now record can't we do that with just in one? I'd think all of them should be available and reachable everywhere jirka
