linux-kernel - [PATCH] tools: perf: remove redundant evsel logic

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Date:	Fri,  1 Jul 2016 12:24:03 +0100
From:	Mark Rutland <mark.rutland@....com>
To:	linux-kernel@...r.kernel.org
Cc:	Mark Rutland <mark.rutland@....com>,
	Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
	Arnaldo Carvalho de Melo <acme@...nel.org>,
	Jiri Olsa <jolsa@...nel.org>
Subject: [PATCH] tools: perf: remove redundant evsel logic

The only caller of perf_evsel__alloc_fd is __perf_evsel__open, which
already has to explicitly handle the case when evsel->system_wide is
true (and therefore nthreads == 1), such that the number of FDs opened
matches the number of FDs it allocates space for.

Remove the duplicate logic and have perf_evsel__alloc_fd trust its
caller to provide the right number of threads.

Signed-off-by: Mark Rutland <mark.rutland@....com>
Cc: Alexander Shishkin <alexander.shishkin@...ux.intel.com>
Cc: Arnaldo Carvalho de Melo <acme@...nel.org> 
Cc: Jiri Olsa <jolsa@...nel.org>
---
 tools/perf/util/evsel.c | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
index 5d7037e..a1fa1c2 100644
--- a/tools/perf/util/evsel.c
+++ b/tools/perf/util/evsel.c
@@ -926,9 +926,6 @@ static int perf_evsel__alloc_fd(struct perf_evsel *evsel, int ncpus, int nthread
 {
 	int cpu, thread;
 
-	if (evsel->system_wide)
-		nthreads = 1;
-
 	evsel->fd = xyarray__new(ncpus, nthreads, sizeof(int));
 
 	if (evsel->fd) {
-- 
1.9.1