linux-kernel - [PATCH v2 2/2] perf test: Introduce script for java symbol testing

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Date:   Sun, 18 Sep 2022 11:15:24 +0800
From:   Leo Yan <leo.yan@...aro.org>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...nel.org>,
        Namhyung Kim <namhyung@...nel.org>,
        linux-kernel@...r.kernel.org, linux-perf-users@...r.kernel.org
Cc:     Leo Yan <leo.yan@...aro.org>, Ian Rogers <irogers@...gle.com>
Subject: [PATCH v2 2/2] perf test: Introduce script for java symbol testing

This commit introduces a script for testing java symbols.

The test records java program, inject samples with JIT samples, check
specific JIT symbols in the report, the test will pass only when these
two symbols are detected.

Suggested-by: Ian Rogers <irogers@...gle.com>
Signed-off-by: Leo Yan <leo.yan@...aro.org>
---
 tools/perf/tests/shell/test_java_symbol.sh | 69 ++++++++++++++++++++++
 1 file changed, 69 insertions(+)
 create mode 100755 tools/perf/tests/shell/test_java_symbol.sh

diff --git a/tools/perf/tests/shell/test_java_symbol.sh b/tools/perf/tests/shell/test_java_symbol.sh
new file mode 100755
index 000000000000..d96fea405ea9
--- /dev/null
+++ b/tools/perf/tests/shell/test_java_symbol.sh
@@ -0,0 +1,69 @@
+#!/bin/bash
+# Test java symbol
+
+# SPDX-License-Identifier: GPL-2.0
+# Leo Yan <leo.yan@...aro.org>, 2022
+
+PERF_DATA=$(mktemp /tmp/__perf_test.perf.data.XXXXX)
+PERF_INJ_DATA=$(mktemp /tmp/__perf_test.perf.data.inj.XXXXX)
+
+cleanup_files()
+{
+	echo "Cleaning up files..."
+	rm -f ${PERF_DATA}
+	rm -f ${PERF_INJ_DATA}
+}
+
+trap cleanup_files exit term int
+
+if [ -e "$PWD/tools/perf/libperf-jvmti.so" ]; then
+	LIBJVMTI=$PWD/tools/perf/libperf-jvmti.so
+elif [ -e "$PWD/libperf-jvmti.so" ]; then
+	LIBJVMTI=$PWD/libperf-jvmti.so
+elif [ -e "$PREFIX/lib64/libperf-jvmti.so" ]; then
+	LIBJVMTI=$PREFIX/lib64/libperf-jvmti.so
+elif [ -e "$PREFIX/lib/libperf-jvmti.so" ]; then
+	LIBJVMTI=$PREFIX/lib/libperf-jvmti.so
+if [ -e "/usr/lib/linux-tools-$(uname -a | awk '{ print $3 }' | sed -r 's/-generic//')/libperf-jvmti.so" ]; then
+	LIBJVMTI=/usr/lib/linux-tools-$(uname -a | awk '{ print $3 }' | sed -r 's/-generic//')/libperf-jvmti.so
+else
+	echo "Fail to find libperf-jvmti.so"
+	# JVMTI is a build option, skip the test if fail to find lib
+	exit 2
+fi
+
+cat <<EOF | perf record -k 1 -o $PERF_DATA jshell -s -J-agentpath:$LIBJVMTI
+int fib(int x) {
+	return x > 1 ? fib(x - 2) + fib(x - 1) : 1;
+}
+
+int q = 0;
+
+for (int i = 0; i < 10; i++)
+	q += fib(i);
+
+System.out.println(q);
+EOF
+
+if [ $? -ne 0 ]; then
+	echo "Fail to record for java program"
+	exit 1
+fi
+
+if ! perf inject -i $PERF_DATA -o $PERF_INJ_DATA -j; then
+	echo "Fail to inject samples"
+	exit 1
+fi
+
+# Below is an example of the instruction samples reporting:
+#   8.18%  jshell           jitted-50116-29.so    [.] Interpreter
+#   0.75%  Thread-1         jitted-83602-1670.so  [.] jdk.internal.jimage.BasicImageReader.getString(int)
+perf report --stdio -i ${PERF_INJ_DATA} 2>&1 | \
+	egrep " +[0-9]+\.[0-9]+% .* (Interpreter|jdk\.internal).*" > /dev/null 2>&1
+
+if [ $? -ne 0 ]; then
+	echo "Fail to find java symbols"
+	exit 1
+fi
+
+exit 0
-- 
2.34.1