linux-kernel - Re: [PATCH 02/18] perf metric: Add struct expr_id

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Date:   Thu, 16 Jul 2020 12:26:51 -0300
From:   Arnaldo Carvalho de Melo <acme@...nel.org>
To:     Ian Rogers <irogers@...gle.com>
Cc:     Jiri Olsa <jolsa@...nel.org>, lkml <linux-kernel@...r.kernel.org>,
        Ingo Molnar <mingo@...nel.org>,
        Namhyung Kim <namhyung@...nel.org>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Peter Zijlstra <a.p.zijlstra@...llo.nl>,
        Michael Petlan <mpetlan@...hat.com>,
        Andi Kleen <ak@...ux.intel.com>,
        Kajol Jain <kjain@...ux.ibm.com>,
        John Garry <john.garry@...wei.com>,
        "Paul A. Clarke" <pc@...ibm.com>,
        Stephane Eranian <eranian@...gle.com>
Subject: Re: [PATCH 02/18] perf metric: Add struct expr_id_data to keep expr
 value

Em Tue, Jul 14, 2020 at 02:06:23PM -0700, Ian Rogers escreveu:
> On Sun, Jul 12, 2020 at 6:26 AM Jiri Olsa <jolsa@...nel.org> wrote:
> >
> > Adding struct expr_id_data to keep expr value
> > instead of just simple double pointer, so we can
> > store more data for ID in following changes.
> >
> > Signed-off-by: Jiri Olsa <jolsa@...nel.org>
> 
> Acked-by: Ian Rogers <irogers@...gle.com>

Thanks, applied.

- Arnaldo
 
> Thanks,
> Ian
> 
> > ---
> >  tools/perf/tests/expr.c       |  3 ++-
> >  tools/perf/util/expr.c        | 22 +++++++++++-----------
> >  tools/perf/util/expr.h        |  4 ++++
> >  tools/perf/util/metricgroup.c |  2 +-
> >  4 files changed, 18 insertions(+), 13 deletions(-)
> >
> > diff --git a/tools/perf/tests/expr.c b/tools/perf/tests/expr.c
> > index d13fc1dfd5ef..4d01051951cd 100644
> > --- a/tools/perf/tests/expr.c
> > +++ b/tools/perf/tests/expr.c
> > @@ -18,8 +18,9 @@ static int test(struct expr_parse_ctx *ctx, const char *e, double val2)
> >
> >  int test__expr(struct test *t __maybe_unused, int subtest __maybe_unused)
> >  {
> > +       struct expr_id_data *val_ptr;
> >         const char *p;
> > -       double val, *val_ptr;
> > +       double val;
> >         int ret;
> >         struct expr_parse_ctx ctx;
> >
> > diff --git a/tools/perf/util/expr.c b/tools/perf/util/expr.c
> > index 9116a3a01eea..5d05f9765ed8 100644
> > --- a/tools/perf/util/expr.c
> > +++ b/tools/perf/util/expr.c
> > @@ -33,32 +33,32 @@ static bool key_equal(const void *key1, const void *key2,
> >  }
> >
> >  /* Caller must make sure id is allocated */
> > -int expr__add_id_val(struct expr_parse_ctx *ctx, const char *name, double val)
> > +int expr__add_id_val(struct expr_parse_ctx *ctx, const char *id, double val)
> >  {
> > -       double *val_ptr = NULL, *old_val = NULL;
> > +       struct expr_id_data *data_ptr = NULL, *old_data = NULL;
> >         char *old_key = NULL;
> >         int ret;
> >
> >         if (val != 0.0) {
> > -               val_ptr = malloc(sizeof(double));
> > -               if (!val_ptr)
> > +               data_ptr = malloc(sizeof(*data_ptr));
> > +               if (!data_ptr)
> >                         return -ENOMEM;
> > -               *val_ptr = val;
> > +               data_ptr->val = val;
> >         }
> > -       ret = hashmap__set(&ctx->ids, name, val_ptr,
> > -                          (const void **)&old_key, (void **)&old_val);
> > +       ret = hashmap__set(&ctx->ids, id, data_ptr,
> > +                          (const void **)&old_key, (void **)&old_data);
> >         free(old_key);
> > -       free(old_val);
> > +       free(old_data);
> >         return ret;
> >  }
> >
> >  int expr__get_id(struct expr_parse_ctx *ctx, const char *id, double *val_ptr)
> >  {
> > -       double *data;
> > +       struct expr_id_data *data;
> >
> >         if (!hashmap__find(&ctx->ids, id, (void **)&data))
> >                 return -1;
> > -       *val_ptr = (data == NULL) ?  0.0 : *data;
> > +       *val_ptr = (data == NULL) ?  0.0 : data->val;
> >         return 0;
> >  }
> >
> > @@ -119,7 +119,7 @@ int expr__parse(double *final_val, struct expr_parse_ctx *ctx,
> >  int expr__find_other(const char *expr, const char *one,
> >                      struct expr_parse_ctx *ctx, int runtime)
> >  {
> > -       double *old_val = NULL;
> > +       struct expr_id_data *old_val = NULL;
> >         char *old_key = NULL;
> >         int ret = __expr__parse(NULL, ctx, expr, EXPR_OTHER, runtime);
> >
> > diff --git a/tools/perf/util/expr.h b/tools/perf/util/expr.h
> > index bb6bac836b48..21fe5bd85718 100644
> > --- a/tools/perf/util/expr.h
> > +++ b/tools/perf/util/expr.h
> > @@ -15,6 +15,10 @@ struct expr_parse_ctx {
> >         struct hashmap ids;
> >  };
> >
> > +struct expr_id_data {
> > +       double  val;
> > +};
> > +
> >  struct expr_scanner_ctx {
> >         int start_token;
> >         int runtime;
> > diff --git a/tools/perf/util/metricgroup.c b/tools/perf/util/metricgroup.c
> > index 82fecb5a302d..df0356ec120d 100644
> > --- a/tools/perf/util/metricgroup.c
> > +++ b/tools/perf/util/metricgroup.c
> > @@ -138,7 +138,7 @@ static struct evsel *find_evsel_group(struct evlist *perf_evlist,
> >                                       unsigned long *evlist_used)
> >  {
> >         struct evsel *ev, *current_leader = NULL;
> > -       double *val_ptr;
> > +       struct expr_id_data *val_ptr;
> >         int i = 0, matched_events = 0, events_to_match;
> >         const int idnum = (int)hashmap__size(&pctx->ids);
> >
> > --
> > 2.25.4
> >

-- 

- Arnaldo