linux-kernel - [PATCH v2 13/16] perf scripting-engines: Move static to local variable

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Date:   Fri, 26 May 2023 11:33:58 -0700
From:   Ian Rogers <irogers@...gle.com>
To:     Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...nel.org>,
        Namhyung Kim <namhyung@...nel.org>,
        Ian Rogers <irogers@...gle.com>,
        Adrian Hunter <adrian.hunter@...el.com>,
        "Masami Hiramatsu (Google)" <mhiramat@...nel.org>,
        "Steven Rostedt (Google)" <rostedt@...dmis.org>,
        Ross Zwisler <zwisler@...omium.org>,
        Leo Yan <leo.yan@...aro.org>,
        Tiezhu Yang <yangtiezhu@...ngson.cn>,
        Yang Jihong <yangjihong1@...wei.com>,
        Andi Kleen <ak@...ux.intel.com>,
        Kan Liang <kan.liang@...ux.intel.com>,
        Ravi Bangoria <ravi.bangoria@....com>,
        Sean Christopherson <seanjc@...gle.com>,
        K Prateek Nayak <kprateek.nayak@....com>,
        Paolo Bonzini <pbonzini@...hat.com>,
        linux-kernel@...r.kernel.org, linux-perf-users@...r.kernel.org
Subject: [PATCH v2 13/16] perf scripting-engines: Move static to local variable

Avoid 16,384 bytes in .bss by stack allocating two bitmaps.

Signed-off-by: Ian Rogers <irogers@...gle.com>
---
 tools/perf/util/scripting-engines/trace-event-perl.c   | 4 ++--
 tools/perf/util/scripting-engines/trace-event-python.c | 5 +++--
 2 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/tools/perf/util/scripting-engines/trace-event-perl.c b/tools/perf/util/scripting-engines/trace-event-perl.c
index 039d0365ad41..65b761d83a1f 100644
--- a/tools/perf/util/scripting-engines/trace-event-perl.c
+++ b/tools/perf/util/scripting-engines/trace-event-perl.c
@@ -67,8 +67,6 @@ INTERP my_perl;
 #define TRACE_EVENT_TYPE_MAX				\
 	((1 << (sizeof(unsigned short) * 8)) - 1)
 
-static DECLARE_BITMAP(events_defined, TRACE_EVENT_TYPE_MAX);
-
 extern struct scripting_context *scripting_context;
 
 static char *cur_field_name;
@@ -353,7 +351,9 @@ static void perl_process_tracepoint(struct perf_sample *sample,
 	void *data = sample->raw_data;
 	unsigned long long nsecs = sample->time;
 	const char *comm = thread__comm_str(thread);
+	DECLARE_BITMAP(events_defined, TRACE_EVENT_TYPE_MAX);
 
+	bitmap_zero(events_defined, TRACE_EVENT_TYPE_MAX);
 	dSP;
 
 	if (evsel->core.attr.type != PERF_TYPE_TRACEPOINT)
diff --git a/tools/perf/util/scripting-engines/trace-event-python.c b/tools/perf/util/scripting-engines/trace-event-python.c
index 41d4f9e6a8b7..40964078f92f 100644
--- a/tools/perf/util/scripting-engines/trace-event-python.c
+++ b/tools/perf/util/scripting-engines/trace-event-python.c
@@ -93,8 +93,6 @@ PyMODINIT_FUNC PyInit_perf_trace_context(void);
 #define TRACE_EVENT_TYPE_MAX				\
 	((1 << (sizeof(unsigned short) * 8)) - 1)
 
-static DECLARE_BITMAP(events_defined, TRACE_EVENT_TYPE_MAX);
-
 #define N_COMMON_FIELDS	7
 
 static char *cur_field_name;
@@ -934,6 +932,9 @@ static void python_process_tracepoint(struct perf_sample *sample,
 	unsigned long long nsecs = sample->time;
 	const char *comm = thread__comm_str(al->thread);
 	const char *default_handler_name = "trace_unhandled";
+	DECLARE_BITMAP(events_defined, TRACE_EVENT_TYPE_MAX);
+
+	bitmap_zero(events_defined, TRACE_EVENT_TYPE_MAX);
 
 	if (!event) {
 		snprintf(handler_name, sizeof(handler_name),
-- 
2.41.0.rc0.172.g3f132b7071-goog