linux-kernel - Re: [PATCH 06/14] perf tests: Add another pmu-events tests

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Date:   Mon, 1 Jun 2020 15:21:47 +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>,
        Stephane Eranian <eranian@...gle.com>,
        Andi Kleen <ak@...ux.intel.com>
Subject: Re: [PATCH 06/14] perf tests: Add another pmu-events tests

On Mon, Jun 01, 2020 at 12:44:15AM -0700, Ian Rogers wrote:

SNIP

> > +       memset(&error, 0, sizeof(error));
> > +       ret = parse_events_fake(evlist, id, &error);
> > +       if (ret) {
> > +               pr_debug("str        : %s\n", error.str);
> > +               pr_debug("help       : %s\n", error.help);
> > +               pr_debug("first_str  : %s\n", error.first_str);
> > +               pr_debug("first_help : %s\n", error.first_help);
> > +       }
> > +
> > +       evlist__delete(evlist);
> > +       free(error.str);
> > +       free(error.help);
> > +       free(error.first_str);
> > +       free(error.first_help);
> > +       return ret;
> > +}
> 
> This is quite similar to check_parse_id, fold them together?

there is the 'same_cpu' logic in check_parse_id,
so I did not want to mess with that

> 
> > +
> > +static int metric_parse_fake(const char *str)
> > +{
> > +       struct expr_parse_ctx ctx;
> > +       struct hashmap_entry *cur;
> > +       double result;
> > +       int ret = -1;
> > +       size_t bkt;
> > +       int i;
> > +
> > +       pr_debug("parsing '%s'\n", str);
> > +
> > +       expr__ctx_init(&ctx);
> > +       if (expr__find_other(str, NULL, &ctx, 0) < 0) {
> > +               pr_err("expr__find_other failed\n");
> > +               return -1;
> > +       }
> > +
> > +       i = 1;
> > +       hashmap__for_each_entry((&ctx.ids), cur, bkt)
> > +               expr__add_id(&ctx, strdup(cur->key), i++);
> 
> It might make sense to share the code here with that in test_parsing.
> This initialization of ids is commented there and it is a bit special.

hum, not sure it's worth to add this complexity to test, I'd like
to keep it simple, it's already not straightforward ;-) I added the
comment you mentioned

jirka