Re: [PATCH v2 1/2] libperf: Add perf_evlist__reset_id_hash()

[Arnaldo Carvalho de Melo]

Em Thu, Feb 25, 2021 at 05:12:37PM +0100, Jiri Olsa escreveu:
> On Thu, Feb 25, 2021 at 12:51:47PM +0900, Namhyung Kim wrote:
> > Add the perf_evlist__reset_id_hash() function as an internal function
> > so that it can be called by perf to reset the hash table.  This is
> > necessary for perf stat to run the workload multiple times.
> > 
> > Signed-off-by: Namhyung Kim <namhyung@xxxxxxxxxx>
> 
> for the patchset
> 
> Acked-by: Jiri Olsa <jolsa@xxxxxxxxxx>
 
> thanks,

Thanks, applied.

- Arnaldo

> jirka
 
> 
> > ---
> >  tools/lib/perf/evlist.c                  | 13 +++++++++----
> >  tools/lib/perf/include/internal/evlist.h |  2 ++
> >  2 files changed, 11 insertions(+), 4 deletions(-)
> > 
> > diff --git a/tools/lib/perf/evlist.c b/tools/lib/perf/evlist.c
> > index 17465d454a0e..a0aaf385cbb5 100644
> > --- a/tools/lib/perf/evlist.c
> > +++ b/tools/lib/perf/evlist.c
> > @@ -26,13 +26,10 @@
> >  
> >  void perf_evlist__init(struct perf_evlist *evlist)
> >  {
> > -	int i;
> > -
> > -	for (i = 0; i < PERF_EVLIST__HLIST_SIZE; ++i)
> > -		INIT_HLIST_HEAD(&evlist->heads[i]);
> >  	INIT_LIST_HEAD(&evlist->entries);
> >  	evlist->nr_entries = 0;
> >  	fdarray__init(&evlist->pollfd, 64);
> > +	perf_evlist__reset_id_hash(evlist);
> >  }
> >  
> >  static void __perf_evlist__propagate_maps(struct perf_evlist *evlist,
> > @@ -237,6 +234,14 @@ static void perf_evlist__id_hash(struct perf_evlist *evlist,
> >  	hlist_add_head(&sid->node, &evlist->heads[hash]);
> >  }
> >  
> > +void perf_evlist__reset_id_hash(struct perf_evlist *evlist)
> > +{
> > +	int i;
> > +
> > +	for (i = 0; i < PERF_EVLIST__HLIST_SIZE; ++i)
> > +		INIT_HLIST_HEAD(&evlist->heads[i]);
> > +}
> > +
> >  void perf_evlist__id_add(struct perf_evlist *evlist,
> >  			 struct perf_evsel *evsel,
> >  			 int cpu, int thread, u64 id)
> > diff --git a/tools/lib/perf/include/internal/evlist.h b/tools/lib/perf/include/internal/evlist.h
> > index 2d0fa02b036f..212c29063ad4 100644
> > --- a/tools/lib/perf/include/internal/evlist.h
> > +++ b/tools/lib/perf/include/internal/evlist.h
> > @@ -124,4 +124,6 @@ int perf_evlist__id_add_fd(struct perf_evlist *evlist,
> >  			   struct perf_evsel *evsel,
> >  			   int cpu, int thread, int fd);
> >  
> > +void perf_evlist__reset_id_hash(struct perf_evlist *evlist);
> > +
> >  #endif /* __LIBPERF_INTERNAL_EVLIST_H */
> > -- 
> > 2.30.0.617.g56c4b15f3c-goog
> > 
> 

-- 

- Arnaldo