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

From: Ian Rogers
Date: Sat Jan 11 2025 - 14:02:23 EST


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@xxxxxxxxxx>
---
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