[RFC PATCH v2 5/5] perf test: Add test validating trace.dat generated by 'perf data convert --to-trace-dat'

[Tanushree Shah <tshah@linux.ibm.com>]

Add a shell test covering perf data convert --to-trace-dat,
alongside the existing --to-json and --to-ctf tests.

The test:
- skips if perf isn't linked with libtraceevent
- converts a plain sched:sched_switch recording to trace.dat
- converts a pipe-mode recording (perf record -o - | perf data
  convert -i -)
- converts a recording with both tracepoint and non-tracepoint
  events (sched:sched_switch,cycles)
- validates the resulting file with trace-cmd report if trace-cmd
  is installed, otherwise falls back to a basic non-empty-file check

Signed-off-by: Tanushree Shah <tshah@linux.ibm.com>
---
 ...rf_data_converter_tracepoints_trace_dat.sh | 169 ++++++++++++++++++
 1 file changed, 169 insertions(+)
 create mode 100755 tools/perf/tests/shell/test_perf_data_converter_tracepoints_trace_dat.sh

diff --git a/tools/perf/tests/shell/test_perf_data_converter_tracepoints_trace_dat.sh b/tools/perf/tests/shell/test_perf_data_converter_tracepoints_trace_dat.sh
new file mode 100755
index 000000000000..9ca6432618cb
--- /dev/null
+++ b/tools/perf/tests/shell/test_perf_data_converter_tracepoints_trace_dat.sh
@@ -0,0 +1,169 @@
+#!/bin/bash
+# 'perf data convert --to-trace-dat' command test
+# SPDX-License-Identifier: GPL-2.0-or-later
+#
+# Copyright 2026, IBM Corporation
+# Author: Tanushree Shah <tshah@linux.ibm.com>
+
+set -e
+
+err=0
+
+perfdata=$(mktemp /tmp/__perf_test.perf.data.XXXXX)
+result=$(mktemp /tmp/__perf_test.output.trace.dat.XXXXX)
+
+cleanup()
+{
+	rm -f "${perfdata}"
+	rm -f "${result}"
+	trap - exit term int
+}
+
+trap_cleanup()
+{
+	echo "Unexpected signal in ${FUNCNAME[1]}"
+	cleanup
+	exit 1
+}
+trap trap_cleanup exit term int
+
+# Check if libtraceevent support is available
+if ! perf check feature libtraceevent
+then
+	echo "perf not linked with libtraceevent, skipping test"
+	exit 2
+fi
+
+# Check if trace-cmd is available for validation
+have_trace_cmd=0
+if command -v trace-cmd >/dev/null 2>&1; then
+	have_trace_cmd=1
+fi
+
+check_sched_switch()
+{
+	if ! perf list | grep -q 'sched:sched_switch'
+	then
+		echo "sched:sched_switch tracepoint not available, skipping test"
+		exit 2
+	fi
+}
+
+test_trace_converter_command()
+{
+	echo "Testing Perf Data Conversion Command to trace.dat"
+
+	if ! perf record -e sched:sched_switch -o "$perfdata" -- sleep 0.1
+	then
+		echo "Failed to record perf data"
+		err=1
+		return
+	fi
+
+	rm -f "$result"
+
+	if ! perf data convert --to-trace-dat "$result" --force -i "$perfdata"
+	then
+		echo "Perf Data Converter Command to trace.dat [FAILED]"
+		err=1
+		return
+	fi
+
+	if [ -f "$result" ] && [ -s "$result" ] ; then
+		echo "Perf Data Converter Command to trace.dat [SUCCESS]"
+	else
+		echo "Perf Data Converter Command to trace.dat [FAILED]"
+		err=1
+	fi
+}
+
+test_trace_converter_pipe()
+{
+	echo "Testing Perf Data Conversion Command to trace.dat (Pipe mode)"
+
+	rm -f "$result"
+
+	if ! perf record -e sched:sched_switch -o - -- sleep 0.1 | \
+	   perf data convert --to-trace-dat "$result" --force -i -
+	then
+		echo "Perf Data Converter Command to trace.dat (Pipe mode) [FAILED]"
+		err=1
+		return
+	fi
+
+	if [ -f "$result" ] && [ -s "$result" ]; then
+		echo "Perf Data Converter Command to trace.dat (Pipe mode) [SUCCESS]"
+	else
+		echo "Perf Data Converter Command to trace.dat (Pipe mode) [FAILED]"
+		err=1
+	fi
+}
+
+test_trace_converter_mixed_events()
+{
+	echo "Testing Perf Data Conversion with tracepoint and non-tracepoint events"
+
+	# Record both tracepoint and non-tracepoint events
+	if ! perf record -e sched:sched_switch,cycles -o "$perfdata" -- sleep 0.1
+	then
+		echo "Failed to record perf data (mixed events)"
+		err=1
+		return
+	fi
+
+	rm -f "$result"
+
+	if ! perf data convert --to-trace-dat "$result" --force -i "$perfdata"
+	then
+		echo "Perf Data Converter with mixed events [FAILED]"
+		err=1
+		return
+	fi
+
+	if [ -f "$result" ] && [ -s "$result" ] ; then
+		echo "Perf Data Converter with mixed events [SUCCESS]"
+	else
+		echo "Perf Data Converter with mixed events [FAILED]"
+		err=1
+	fi
+}
+
+validate_trace_format()
+{
+	echo "Validating Perf Data Converted trace.dat file"
+
+	if [ ! -f "$result" ] ; then
+		echo "File not found [FAILED]"
+		err=1
+		return
+	fi
+
+	# If trace-cmd is available, use it to validate the file
+	if [ "$have_trace_cmd" -eq 1 ] ; then
+		if trace-cmd report -i "$result" >/dev/null 2>&1 ; then
+			echo "trace-cmd can read the file [SUCCESS]"
+		else
+			echo "trace-cmd cannot read the file [FAILED]"
+			err=1
+		fi
+	else
+		# Without trace-cmd, just check file exists and has content
+		if [ -s "$result" ] ; then
+			echo "Output file exists and has content [SUCCESS]"
+		else
+			echo "Output file is empty [FAILED]"
+			err=1
+		fi
+	fi
+}
+
+check_sched_switch
+test_trace_converter_command
+validate_trace_format
+test_trace_converter_pipe
+validate_trace_format
+test_trace_converter_mixed_events
+validate_trace_format
+
+cleanup
+exit ${err}
-- 
2.47.3