Re: [PATCH v2 05/11] perf expr: increase max other

Ian Rogers
2020-04-23T14:24:11Z

On Thu, Apr 23, 2020 at 4:29 AM Jiri Olsa <jolsa@redhat.com> wrote:
>
> On Wed, Apr 22, 2020 at 03:04:24PM -0700, Ian Rogers wrote:
> > Large metrics such as Branch_Misprediction_Cost_SMT on x86 broadwell
> > need more space.
> >
> > Signed-off-by: Ian Rogers <irogers@google.com>
> > ---
> > tools/perf/util/expr.h | 2 +-
> > 1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/tools/perf/util/expr.h b/tools/perf/util/expr.h
> > index 0938ad166ece..4938bfc608b7 100644
> > --- a/tools/perf/util/expr.h
> > +++ b/tools/perf/util/expr.h
> > @@ -2,7 +2,7 @@
> > #ifndef PARSE_CTX_H
> > #define PARSE_CTX_H 1
> >
> > -#define EXPR_MAX_OTHER 20
> > +#define EXPR_MAX_OTHER 64
> > #define MAX_PARSE_ID EXPR_MAX_OTHER
> >
> > struct expr_parse_id {
> > --
> > 2.26.2.303.gf8c07b1a785-goog
> >
>
> ok, and we should probably start to think about what Andi suggested
> in here: https://lore.kernel.org/lkml/20200224210308.GQ160988@tassilo.jf.intel.com/

Agreed, a hash table would make sense. This was the smallest value
that would let the test on x86 pass.

Thanks,
Ian

> jirka
>