linux-kernel - [PATCH v1 10/17] perf tests c2c: Add a basic c2c

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Message-ID: <20251122081929.7588-11-irogers@google.com>
Date: Sat, 22 Nov 2025 00:19:22 -0800
From: Ian Rogers <irogers@...gle.com>
To: Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...hat.com>, 
	Arnaldo Carvalho de Melo <acme@...nel.org>, Namhyung Kim <namhyung@...nel.org>, 
	Alexander Shishkin <alexander.shishkin@...ux.intel.com>, Jiri Olsa <jolsa@...nel.org>, 
	Ian Rogers <irogers@...gle.com>, Adrian Hunter <adrian.hunter@...el.com>, 
	James Clark <james.clark@...aro.org>, Collin Funk <collin.funk1@...il.com>, 
	Dmitry Vyukov <dvyukov@...gle.com>, Andi Kleen <ak@...ux.intel.com>, 
	Thomas Falcon <thomas.falcon@...el.com>, Leo Yan <leo.yan@....com>, 
	Yicong Yang <yangyicong@...ilicon.com>, Greg Kroah-Hartman <gregkh@...uxfoundation.org>, 
	"Masami Hiramatsu (Google)" <mhiramat@...nel.org>, Stephen Brennan <stephen.s.brennan@...cle.com>, 
	Haibo Xu <haibo1.xu@...el.com>, linux-kernel@...r.kernel.org, 
	linux-perf-users@...r.kernel.org
Subject: [PATCH v1 10/17] perf tests c2c: Add a basic c2c

Add basic c2c record and report testing to gain some coverage.

Signed-off-by: Ian Rogers <irogers@...gle.com>
---
 tools/perf/tests/shell/c2c.sh | 62 +++++++++++++++++++++++++++++++++++
 1 file changed, 62 insertions(+)
 create mode 100755 tools/perf/tests/shell/c2c.sh

diff --git a/tools/perf/tests/shell/c2c.sh b/tools/perf/tests/shell/c2c.sh
new file mode 100755
index 000000000000..2471d44595c3
--- /dev/null
+++ b/tools/perf/tests/shell/c2c.sh
@@ -0,0 +1,62 @@
+#!/bin/bash
+# perf c2c tests
+# SPDX-License-Identifier: GPL-2.0
+
+set -e
+
+err=0
+perfdata=$(mktemp /tmp/__perf_c2c_test.perf.data.XXXXX)
+
+cleanup() {
+	rm -f "${perfdata}"
+	rm -f "${perfdata}".old
+	trap - EXIT TERM INT
+}
+
+trap_cleanup() {
+	echo "Unexpected signal in ${FUNCNAME[1]}"
+	cleanup
+	exit 1
+}
+trap trap_cleanup EXIT TERM INT
+
+check_c2c_support() {
+	# Check if perf c2c record works.
+	if ! perf c2c record -o "${perfdata}" -- true > /dev/null 2>&1 ; then
+		return 1
+	fi
+	return 0
+}
+
+test_c2c_record_report() {
+	echo "c2c record and report test"
+	if ! check_c2c_support ; then
+		echo "c2c record and report test [Skipped: perf c2c record failed (possibly missing hardware support)]"
+		err=2
+		return
+	fi
+
+	# Run a workload that does some memory operations.
+	if ! perf c2c record -o "${perfdata}" -- perf test -w datasym 1 > /dev/null 2>&1 ; then
+		echo "c2c record and report test [Skipped: perf c2c record failed during workload]"
+		return
+	fi
+
+	if ! perf c2c report -i "${perfdata}" --stdio > /dev/null 2>&1 ; then
+		echo "c2c record and report test [Failed: report failed]"
+		err=1
+		return
+	fi
+
+	if ! perf c2c report -i "${perfdata}" -N > /dev/null 2>&1 ; then
+		echo "c2c record and report test [Failed: report -N failed]"
+		err=1
+		return
+	fi
+
+	echo "c2c record and report test [Success]"
+}
+
+test_c2c_record_report
+cleanup
+exit $err
-- 
2.52.0.rc2.455.g230fcf2819-goog