linux-kernel - Re: [PATCH 03/10] perf tools: Add expr__add

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Date:   Sun, 28 Jun 2020 23:38:04 +0200
From:   Jiri Olsa <jolsa@...hat.com>
To:     Ian Rogers <irogers@...gle.com>
Cc:     Jiri Olsa <jolsa@...nel.org>,
        Arnaldo Carvalho de Melo <acme@...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 03/10] perf tools: Add expr__add_id function

On Fri, Jun 26, 2020 at 01:07:24PM -0700, Ian Rogers wrote:
> On Fri, Jun 26, 2020 at 12:47 PM Jiri Olsa <jolsa@...nel.org> wrote:
> >
> > Adding expr__add_id function to data for ID
> > with zero value, which is used when scanning
> > the expression for IDs.
> >
> > Signed-off-by: Jiri Olsa <jolsa@...nel.org>
> > ---
> >  tools/perf/util/expr.c | 29 +++++++++++++++++++++++------
> >  tools/perf/util/expr.h |  1 +
> >  tools/perf/util/expr.y |  2 +-
> >  3 files changed, 25 insertions(+), 7 deletions(-)
> >
> > diff --git a/tools/perf/util/expr.c b/tools/perf/util/expr.c
> > index 7573b21e73df..0b6d3a6ce88e 100644
> > --- a/tools/perf/util/expr.c
> > +++ b/tools/perf/util/expr.c
> > @@ -32,6 +32,24 @@ static bool key_equal(const void *key1, const void *key2,
> >         return !strcmp((const char *)key1, (const char *)key2);
> >  }
> >
> > +/* Caller must make sure id is allocated */
> > +int expr__add_id(struct expr_parse_ctx *ctx, const char *name)
> 
> Nit, perhaps "id" is more consistent than "name". Perhaps also change
> add_val below.

ok, will change

thanks,
jirka

> 
> Acked-by: Ian Rogers <irogers@...gle.com>
> 
> > +{
> > +       struct expr_parse_data *data_ptr = NULL, *old_data = NULL;
> > +       char *old_key = NULL;
> > +       int ret;
> > +
> > +       data_ptr = malloc(sizeof(*data_ptr));
> > +       if (!data_ptr)
> > +               return -ENOMEM;
> > +
> > +       ret = hashmap__set(&ctx->ids, name, data_ptr,
> > +                          (const void **)&old_key, (void **)&old_data);
> > +       free(old_key);
> > +       free(old_data);
> > +       return ret;
> > +}
> > +
> >  /* Caller must make sure id is allocated */
> >  int expr__add_val(struct expr_parse_ctx *ctx, const char *name, double val)
> >  {
> > @@ -39,12 +57,11 @@ int expr__add_val(struct expr_parse_ctx *ctx, const char *name, double val)
> >         char *old_key = NULL;
> >         int ret;
> >
> > -       if (val != 0.0) {
> > -               data_ptr = malloc(sizeof(*data_ptr));
> > -               if (!data_ptr)
> > -                       return -ENOMEM;
> > -               data_ptr->val = val;
> > -       }
> > +       data_ptr = malloc(sizeof(*data_ptr));
> > +       if (!data_ptr)
> > +               return -ENOMEM;
> > +       data_ptr->val = val;
> > +
> >         ret = hashmap__set(&ctx->ids, name, data_ptr,
> >                            (const void **)&old_key, (void **)&old_data);
> >         free(old_key);
> > diff --git a/tools/perf/util/expr.h b/tools/perf/util/expr.h
> > index f9f16efe76bc..5452e641acf4 100644
> > --- a/tools/perf/util/expr.h
> > +++ b/tools/perf/util/expr.h
> > @@ -26,6 +26,7 @@ struct expr_scanner_ctx {
> >
> >  void expr__ctx_init(struct expr_parse_ctx *ctx);
> >  void expr__ctx_clear(struct expr_parse_ctx *ctx);
> > +int expr__add_id(struct expr_parse_ctx *ctx, const char *name);
> >  int expr__add_val(struct expr_parse_ctx *ctx, const char *id, double val);
> >  int expr__get_id(struct expr_parse_ctx *ctx, const char *id, double *val_ptr);
> >  int expr__parse(double *final_val, struct expr_parse_ctx *ctx,
> > diff --git a/tools/perf/util/expr.y b/tools/perf/util/expr.y
> > index ff5e5f6e170d..ac4b119877e0 100644
> > --- a/tools/perf/util/expr.y
> > +++ b/tools/perf/util/expr.y
> > @@ -71,7 +71,7 @@ all_other: all_other other
> >
> >  other: ID
> >  {
> > -       expr__add_val(ctx, $1, 0.0);
> > +       expr__add_id(ctx, $1);
> >  }
> >  |
> >  MIN | MAX | IF | ELSE | SMT_ON | NUMBER | '|' | '^' | '&' | '-' | '+' | '*' | '/' | '%' | '(' | ')' | ','
> > --
> > 2.25.4
> >
>