d52a995f35
Reviewed-by: lmesnik, dholmes, rriggs, stefank
144 lines
5.5 KiB
Java
144 lines
5.5 KiB
Java
/*
|
|
* 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.
|
|
*/
|
|
|
|
import java.util.regex.Pattern;
|
|
import java.util.regex.Matcher;
|
|
|
|
import jdk.test.lib.process.ProcessTools;
|
|
import jdk.test.lib.process.OutputAnalyzer;
|
|
|
|
/**
|
|
* @test
|
|
* @summary Check that timer slack options work
|
|
* @requires os.family == "linux"
|
|
* @requires vm.flagless
|
|
* @library /test/lib
|
|
* @run driver TestTimerSlack
|
|
*/
|
|
public class TestTimerSlack {
|
|
|
|
public static void main(String[] args) throws Exception {
|
|
int defaultSlack;
|
|
|
|
// Check the timer slack value is not printed by default
|
|
{
|
|
ProcessBuilder pb = ProcessTools.createLimitedTestJavaProcessBuilder("-Xlog:os+thread",
|
|
"TestTimerSlack$TestMain");
|
|
|
|
OutputAnalyzer output = new OutputAnalyzer(pb.start());
|
|
output.shouldHaveExitValue(0);
|
|
output.shouldNotContain("timer slack:");
|
|
}
|
|
|
|
// Check the timer slack value is not printed when explicitly disabled
|
|
{
|
|
ProcessBuilder pb = ProcessTools.createLimitedTestJavaProcessBuilder("-Xlog:os+thread",
|
|
"-XX:+UnlockExperimentalVMOptions",
|
|
"-XX:TimerSlack=-1",
|
|
"TestTimerSlack$TestMain");
|
|
|
|
OutputAnalyzer output = new OutputAnalyzer(pb.start());
|
|
output.shouldHaveExitValue(0);
|
|
output.shouldNotContain("timer slack:");
|
|
}
|
|
|
|
// Check the timer slack value is good when system-wide default is requested
|
|
{
|
|
ProcessBuilder pb = ProcessTools.createLimitedTestJavaProcessBuilder("-Xlog:os+thread",
|
|
"-XX:+UnlockExperimentalVMOptions",
|
|
"-XX:TimerSlack=0",
|
|
"TestTimerSlack$TestMain");
|
|
|
|
OutputAnalyzer output = new OutputAnalyzer(pb.start());
|
|
output.shouldHaveExitValue(0);
|
|
output.shouldContain("timer slack:");
|
|
|
|
defaultSlack = parseSlackValue(output);
|
|
|
|
if (defaultSlack == 0) {
|
|
fail(output, "Default slack value (" + defaultSlack + ") is unexpected");
|
|
}
|
|
}
|
|
|
|
// Check the timer slack value is accepted by all threads
|
|
for (int slack : new int[] {1, 10, 100, 1000, 10000, 100000, 1000000}) {
|
|
ProcessBuilder pb = ProcessTools.createLimitedTestJavaProcessBuilder("-Xlog:os+thread",
|
|
"-XX:+UnlockExperimentalVMOptions",
|
|
"-XX:TimerSlack=" + slack,
|
|
"TestTimerSlack$TestMain");
|
|
|
|
OutputAnalyzer output = new OutputAnalyzer(pb.start());
|
|
output.shouldHaveExitValue(0);
|
|
output.shouldContain("timer slack:");
|
|
|
|
int actualSlack = parseSlackValue(output);
|
|
if (actualSlack != slack) {
|
|
fail(output, "Actual slack value (" + actualSlack + ") is not the requested one (" + slack + ")");
|
|
}
|
|
}
|
|
}
|
|
|
|
static final Pattern EXTRACT_PATTERN = Pattern.compile("(.*)timer slack: ([0-9]+)ns(.*)");
|
|
|
|
public static int parseSlackValue(OutputAnalyzer output) {
|
|
Integer value = null;
|
|
for (String s : output.asLines()) {
|
|
Matcher m = EXTRACT_PATTERN.matcher(s);
|
|
if (m.matches()) {
|
|
Integer parsedValue = Integer.parseInt(m.group(2));
|
|
if (value == null) {
|
|
value = parsedValue;
|
|
} else if (!value.equals(parsedValue)) {
|
|
fail(output, "Multiple timer slack values detected");
|
|
}
|
|
}
|
|
}
|
|
if (value == null) {
|
|
fail(output, "No timer slack values detected");
|
|
}
|
|
return value;
|
|
}
|
|
|
|
private static void fail(OutputAnalyzer output, String msg) {
|
|
output.reportDiagnosticSummary();
|
|
throw new IllegalStateException(msg);
|
|
}
|
|
|
|
public static class TestMain {
|
|
static final int THREADS = 8;
|
|
|
|
public static void main(String... args) throws Exception {
|
|
Thread[] ts = new Thread[THREADS];
|
|
for (int c = 0; c < THREADS; c++) {
|
|
ts[c] = new Thread();
|
|
ts[c].start();
|
|
}
|
|
|
|
for (int c = 0; c < THREADS; c++) {
|
|
ts[c].join();
|
|
}
|
|
}
|
|
}
|
|
|
|
}
|