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perf tools: Dedup events in expression parsing

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Avoid adding redundant events while parsing an expression.  When we add
an "other" event check first if it already exists.

v2: Fix perf test failure.

Signed-off-by: Andi Kleen <ak@linux.intel.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Link: http://lkml.kernel.org/r/20170811232634.30465-10-andi@firstfloor.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Andi Kleen 2017-08-11 16:26:25 -07:00 committed by Arnaldo Carvalho de Melo
parent 8d3db2b97f
commit d66dccdb13
1 changed files with 14 additions and 1 deletions
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15
tools/perf/util/expr.y
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@ -181,6 +181,19 @@ void expr__ctx_init(struct parse_ctx *ctx)
ctx->num_ids = 0;
}
static bool already_seen(const char *val, const char *one, const char **other,
int num_other)
{
int i;
if (one && !strcasecmp(one, val))
return true;
for (i = 0; i < num_other; i++)
if (!strcasecmp(other[i], val))
return true;
return false;
}
int expr__find_other(const char *p, const char *one, const char ***other,
int *num_otherp)
{
@ -200,7 +213,7 @@ int expr__find_other(const char *p, const char *one, const char ***other,
err = 0;
break;
}
if (tok == ID && (!one || strcasecmp(one, val.id))) {
if (tok == ID && !already_seen(val.id, one, *other, num_other)) {
if (num_other >= EXPR_MAX_OTHER - 1) {
pr_debug("Too many extra events in %s\n", orig);
break;