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/*
* Copyright Amazon.com Inc. or its affiliates. All Rights Reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/**
* @test TestOnSpinWaitAArch64DefaultFlags
* @summary Check default values of '-XX:OnSpinWaitInst' and '-XX:OnSpinWaitInstCount' for AArch64 implementations.
* @bug 8277137
* @library /test/lib /
*
* @requires os.arch=="aarch64"
*
* @build jdk.test.whitebox.WhiteBox
* @run driver jdk.test.lib.helpers.ClassFileInstaller jdk.test.whitebox.WhiteBox
* @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions
* -XX:+WhiteBoxAPI
* compiler.onSpinWait.TestOnSpinWaitAArch64DefaultFlags
*/
package compiler.onSpinWait;
import java.util.Iterator;
import java.util.List;
import jdk.test.lib.process.OutputAnalyzer;
import jdk.test.lib.process.ProcessTools;
import jdk.test.whitebox.cpuinfo.CPUInfo;
public class TestOnSpinWaitAArch64DefaultFlags {
private static boolean isCPUModelNeoverseN1(String cpuModel) {
return cpuModel.contains("0xd0c");
}
private static void checkFinalFlagsEqualTo(ProcessBuilder pb, String expectedOnSpinWaitInstValue, String expectedOnSpinWaitInstCountValue) throws Exception {
OutputAnalyzer analyzer = new OutputAnalyzer(pb.start());
analyzer.shouldHaveExitValue(0);
Iterator<String> iter = analyzer.asLines().listIterator();
String line = null;
boolean hasExpectedOnSpinWaitInstValue = false;
boolean hasExpectedOnSpinWaitInstCountValue = false;
while (iter.hasNext()) {
line = iter.next();
if (!hasExpectedOnSpinWaitInstValue && line.contains("ccstr OnSpinWaitInst")) {
hasExpectedOnSpinWaitInstValue = line.contains("= " + expectedOnSpinWaitInstValue);
}
if (!hasExpectedOnSpinWaitInstCountValue && line.contains("uint OnSpinWaitInstCount")) {
hasExpectedOnSpinWaitInstCountValue = line.contains("= " + expectedOnSpinWaitInstCountValue);
}
}
if (!hasExpectedOnSpinWaitInstValue) {
System.out.println(analyzer.getOutput());
throw new RuntimeException("OnSpinWaitInst with the expected value '" + expectedOnSpinWaitInstValue + "' not found.");
}
if (!hasExpectedOnSpinWaitInstCountValue) {
System.out.println(analyzer.getOutput());
throw new RuntimeException("OnSpinWaitInstCount with the expected value '" + expectedOnSpinWaitInstCountValue + "' not found.");
}
}
public static void main(String[] args) throws Exception {
List<String> cpuFeatures = CPUInfo.getFeatures();
if (cpuFeatures.isEmpty()) {
System.out.println("Skip because no CPU features are available.");
return;
}
final String cpuModel = cpuFeatures.get(0);
if (isCPUModelNeoverseN1(cpuModel)) {
checkFinalFlagsEqualTo(ProcessTools.createLimitedTestJavaProcessBuilder("-XX:+UnlockDiagnosticVMOptions", "-XX:+PrintFlagsFinal", "-version"),
"isb", "1");
checkFinalFlagsEqualTo(ProcessTools.createLimitedTestJavaProcessBuilder("-XX:+UnlockDiagnosticVMOptions", "-XX:OnSpinWaitInstCount=2", "-XX:+PrintFlagsFinal", "-version"),
"isb", "2");
} else {
System.out.println("Skip because no defaults for CPU model: " + cpuModel);
}
}
}
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