linux-kernel - [PATCH v1 01/10] perf bench evlist-open-close: Reduce scope of 2 variables

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Message-Id: <20250111190143.1029906-2-irogers@google.com>
Date: Sat, 11 Jan 2025 11:01:34 -0800
From: Ian Rogers <irogers@...gle.com>
To: Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...hat.com>, 
	Arnaldo Carvalho de Melo <acme@...nel.org>, Namhyung Kim <namhyung@...nel.org>, 
	Mark Rutland <mark.rutland@....com>, 
	Alexander Shishkin <alexander.shishkin@...ux.intel.com>, Jiri Olsa <jolsa@...nel.org>, 
	Ian Rogers <irogers@...gle.com>, Adrian Hunter <adrian.hunter@...el.com>, 
	Kan Liang <kan.liang@...ux.intel.com>, Hao Ge <gehao@...inos.cn>, 
	James Clark <james.clark@...aro.org>, Howard Chu <howardchu95@...il.com>, 
	Dominique Martinet <asmadeus@...ewreck.org>, Levi Yun <yeoreum.yun@....com>, 
	Xu Yang <xu.yang_2@....com>, Tengda Wu <wutengda@...weicloud.com>, 
	Yang Jihong <yangjihong1@...wei.com>, linux-perf-users@...r.kernel.org, 
	linux-kernel@...r.kernel.org
Subject: [PATCH v1 01/10] perf bench evlist-open-close: Reduce scope of 2 variables

Make 2 global variables local. Reduces ELF binary size by removing
relocations. For a no flags build, the perf binary size is reduced by
4,144 bytes on x86-64.

Signed-off-by: Ian Rogers <irogers@...gle.com>
---
 tools/perf/bench/evlist-open-close.c | 42 +++++++++++++++-------------
 1 file changed, 23 insertions(+), 19 deletions(-)

diff --git a/tools/perf/bench/evlist-open-close.c b/tools/perf/bench/evlist-open-close.c
index 5a27691469ed..79cedcf94a39 100644
--- a/tools/perf/bench/evlist-open-close.c
+++ b/tools/perf/bench/evlist-open-close.c
@@ -46,25 +46,6 @@ static struct record_opts opts = {
 	.ctl_fd_ack          = -1,
 };
 
-static const struct option options[] = {
-	OPT_STRING('e', "event", &event_string, "event", "event selector. use 'perf list' to list available events"),
-	OPT_INTEGER('n', "nr-events", &nr_events,
-		     "number of dummy events to create (default 1). If used with -e, it clones those events n times (1 = no change)"),
-	OPT_INTEGER('i', "iterations", &iterations, "Number of iterations used to compute average (default=100)"),
-	OPT_BOOLEAN('a', "all-cpus", &opts.target.system_wide, "system-wide collection from all CPUs"),
-	OPT_STRING('C', "cpu", &opts.target.cpu_list, "cpu", "list of cpus where to open events"),
-	OPT_STRING('p', "pid", &opts.target.pid, "pid", "record events on existing process id"),
-	OPT_STRING('t', "tid", &opts.target.tid, "tid", "record events on existing thread id"),
-	OPT_STRING('u', "uid", &opts.target.uid_str, "user", "user to profile"),
-	OPT_BOOLEAN(0, "per-thread", &opts.target.per_thread, "use per-thread mmaps"),
-	OPT_END()
-};
-
-static const char *const bench_usage[] = {
-	"perf bench internals evlist-open-close <options>",
-	NULL
-};
-
 static int evlist__count_evsel_fds(struct evlist *evlist)
 {
 	struct evsel *evsel;
@@ -225,6 +206,29 @@ static char *bench__repeat_event_string(const char *evstr, int n)
 
 int bench_evlist_open_close(int argc, const char **argv)
 {
+	const struct option options[] = {
+		OPT_STRING('e', "event", &event_string, "event",
+			   "event selector. use 'perf list' to list available events"),
+		OPT_INTEGER('n', "nr-events", &nr_events,
+			    "number of dummy events to create (default 1). If used with -e, it clones those events n times (1 = no change)"),
+		OPT_INTEGER('i', "iterations", &iterations,
+			    "Number of iterations used to compute average (default=100)"),
+		OPT_BOOLEAN('a', "all-cpus", &opts.target.system_wide,
+			    "system-wide collection from all CPUs"),
+		OPT_STRING('C', "cpu", &opts.target.cpu_list, "cpu",
+			   "list of cpus where to open events"),
+		OPT_STRING('p', "pid", &opts.target.pid, "pid",
+			   "record events on existing process id"),
+		OPT_STRING('t', "tid", &opts.target.tid, "tid",
+			   "record events on existing thread id"),
+		OPT_STRING('u', "uid", &opts.target.uid_str, "user", "user to profile"),
+		OPT_BOOLEAN(0, "per-thread", &opts.target.per_thread, "use per-thread mmaps"),
+		OPT_END()
+	};
+	const char *const bench_usage[] = {
+		"perf bench internals evlist-open-close <options>",
+		NULL
+	};
 	char *evstr, errbuf[BUFSIZ];
 	int err;
 
-- 
2.47.1.613.gc27f4b7a9f-goog