perf test: Add perf trace summary test

$ sudo ./perf test -vv 'trace summary'
  109: perf trace summary:
  --- start ---
  test child forked, pid 3501572
  testing: perf trace -s -- true
  testing: perf trace -S -- true
  testing: perf trace -s --summary-mode=thread -- true
  testing: perf trace -S --summary-mode=total -- true
  testing: perf trace -as --summary-mode=thread --no-bpf-summary -- true
  testing: perf trace -as --summary-mode=total --no-bpf-summary -- true
  testing: perf trace -as --summary-mode=thread --bpf-summary -- true
  testing: perf trace -as --summary-mode=total --bpf-summary -- true
  testing: perf trace -aS --summary-mode=total --bpf-summary -- true
  ---- end(0) ----
  109: perf trace summary                                              : Ok

Reviewed-by: Howard Chu <howardchu95@gmail.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Howard Chu <howardchu95@gmail.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Song Liu <song@kernel.org>
Cc: bpf@vger.kernel.org
Link: https://lore.kernel.org/r/20250326044001.3503432-2-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/tests/shell/trace_summary.sh

@@ -0,0 +1,65 @@
+#!/bin/sh
+# perf trace summary
+# SPDX-License-Identifier: GPL-2.0
+
+# Check that perf trace works with various summary mode
+
+# shellcheck source=lib/probe.sh
+. "$(dirname $0)"/lib/probe.sh
+
+skip_if_no_perf_trace || exit 2
+[ "$(id -u)" = 0 ] || exit 2
+
+OUTPUT=$(mktemp /tmp/perf_trace_test.XXXXX)
+
+test_perf_trace() {
+    args=$1
+    workload="true"
+    search="^\s*(open|read|close).*[0-9]+%$"
+
+    echo "testing: perf trace ${args} -- ${workload}"
+    perf trace ${args} -- ${workload} >${OUTPUT} 2>&1
+    if [ $? -ne 0 ]; then
+        echo "Error: perf trace ${args} failed unexpectedly"
+        cat ${OUTPUT}
+        rm -f ${OUTPUT}
+        exit 1
+    fi
+
+    count=$(grep -E -c -m 3 "${search}" ${OUTPUT})
+    if [ "${count}" != "3" ]; then
+	echo "Error: cannot find enough pattern ${search} in the output"
+	cat ${OUTPUT}
+	rm -f ${OUTPUT}
+	exit 1
+    fi
+}
+
+# summary only for a process
+test_perf_trace "-s"
+
+# normal output with summary at the end
+test_perf_trace "-S"
+
+# summary only with an explicit summary mode
+test_perf_trace "-s --summary-mode=thread"
+
+# summary with normal output - total summary mode
+test_perf_trace "-S --summary-mode=total"
+
+# summary only for system wide - per-thread summary
+test_perf_trace "-as --summary-mode=thread --no-bpf-summary"
+
+# summary only for system wide - total summary mode
+test_perf_trace "-as --summary-mode=total --no-bpf-summary"
+
+# summary only for system wide - per-thread summary with BPF
+test_perf_trace "-as --summary-mode=thread --bpf-summary"
+
+# summary only for system wide - total summary mode with BPF
+test_perf_trace "-as --summary-mode=total --bpf-summary"
+
+# summary with normal output for system wide - total summary mode with BPF
+test_perf_trace "-aS --summary-mode=total --bpf-summary"
+
+rm -f ${OUTPUT}