[PATCH v6 07/26] perf trace: Start BPF summary before starting workload

[Ian Rogers]

trace_start_bpf_summary() is called after evlist__start_workload(), so a
short lived workload can make its syscalls, or even exit, before the BPF
summary is enabled. It also ignores --delay. Enable it along with the
evlist, before the workload starts or after the initial delay.

Assisted-by: Antigravity:gemini-3.1-pro
Signed-off-by: Ian Rogers <irogers@xxxxxxxxxx>
---
 tools/perf/builtin-trace.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
index f94745a60f4a..1ffe824ba670 100644
--- a/tools/perf/builtin-trace.c
+++ b/tools/perf/builtin-trace.c
@@ -4855,17 +4855,19 @@ static int trace__run(struct trace *trace, int argc, const char **argv)
 	if (!target__none(&trace->opts.target) && !trace->opts.target.initial_delay)
 		evlist__enable(evlist);
 
+	if (trace->summary_bpf && !trace->opts.target.initial_delay)
+		trace_start_bpf_summary();
+
 	if (forks)
 		evlist__start_workload(evlist);
 
 	if (trace->opts.target.initial_delay) {
 		usleep(trace->opts.target.initial_delay * 1000);
 		evlist__enable(evlist);
+		if (trace->summary_bpf)
+			trace_start_bpf_summary();
 	}
 
-	if (trace->summary_bpf)
-		trace_start_bpf_summary();
-
 	trace->multiple_threads = perf_thread_map__pid(evlist__core(evlist)->threads, 0) == -1 ||
 		perf_thread_map__nr(evlist__core(evlist)->threads) > 1 ||
 		evlist__first(evlist)->core.attr.inherit;
-- 
2.56.0.rc1.315.gc6ed9934b7-goog