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/*
* Copyright (c) 2014, 2017, Oracle and/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 InitialAndMaxUsageTest
* @summary testing of initial and max usage
* @modules java.base/jdk.internal.misc
* java.management
* @library /test/lib /
*
* @build sun.hotspot.WhiteBox
* @run driver ClassFileInstaller sun.hotspot.WhiteBox
* sun.hotspot.WhiteBox$WhiteBoxPermission
* @run main/othervm -Xbootclasspath/a:. -XX:-UseCodeCacheFlushing
* -XX:-MethodFlushing -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI
* -XX:CompileCommand=compileonly,null::* -XX:-UseLargePages
* -XX:+SegmentedCodeCache
* compiler.codecache.jmx.InitialAndMaxUsageTest
* @run main/othervm -Xbootclasspath/a:. -XX:-UseCodeCacheFlushing
* -XX:-MethodFlushing -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI
* -XX:CompileCommand=compileonly,null::* -XX:-UseLargePages
* -XX:-SegmentedCodeCache
* compiler.codecache.jmx.InitialAndMaxUsageTest
*/
package compiler.codecache.jmx;
import jdk.test.lib.Asserts;
import sun.hotspot.code.BlobType;
import java.lang.management.MemoryPoolMXBean;
import java.util.ArrayList;
import java.util.List;
public class InitialAndMaxUsageTest {
private static final double CACHE_USAGE_COEF = 0.95d;
private final BlobType btype;
private final boolean lowerBoundIsZero;
private final long maxSize;
public InitialAndMaxUsageTest(BlobType btype) {
this.btype = btype;
this.maxSize = btype.getSize();
/* Only profiled code cache initial size should be 0, because of
-XX:CompileCommand=compileonly,null::* non-methods might be not empty,
as well as non-profiled methods, because it's used as fallback in
case non-methods is full */
lowerBoundIsZero = btype == BlobType.MethodProfiled;
}
public static void main(String[] args) {
for (BlobType btype : BlobType.getAvailable()) {
new InitialAndMaxUsageTest(btype).runTest();
}
}
private boolean canAllocate(double size, long maxSize, MemoryPoolMXBean bean) {
// Don't fill too much to have space for adapters. So, stop after crossing 95% and
// don't allocate in case we'll cross 97% on next allocation.
double used = bean.getUsage().getUsed();
return (used <= CACHE_USAGE_COEF * maxSize) &&
(used + size <= (CACHE_USAGE_COEF + 0.02d) * maxSize);
}
protected void runTest() {
long headerSize = CodeCacheUtils.getHeaderSize(btype);
MemoryPoolMXBean bean = btype.getMemoryPool();
long initialUsage = btype.getMemoryPool().getUsage().getUsed();
System.out.printf("INFO: trying to test %s of max size %d and initial"
+ " usage %d%n", bean.getName(), maxSize, initialUsage);
Asserts.assertLT(initialUsage + headerSize + 1L, maxSize,
"Initial usage is close to total size for " + bean.getName());
if (lowerBoundIsZero) {
Asserts.assertEQ(initialUsage, 0L, "Unexpected initial usage");
}
ArrayList<Long> blobs = new ArrayList<>();
long minAllocationUnit = Math.max(1, CodeCacheUtils.MIN_ALLOCATION - headerSize);
/* now filling code cache with large-sized allocation first, since
lots of small allocations takes too much time, so, just a small
optimization */
try {
for (long size = 100_000 * minAllocationUnit; size > 0; size /= 10) {
long blob = 0;
while (canAllocate(size, maxSize, bean) &&
(blob = CodeCacheUtils.WB.allocateCodeBlob(size, btype.id)) != 0) {
blobs.add(blob);
}
}
Asserts.assertGT((double) bean.getUsage().getUsed(),
CACHE_USAGE_COEF * maxSize, String.format("Unable to fill "
+ "more than %f of %s. Reported usage is %d ",
CACHE_USAGE_COEF, bean.getName(),
bean.getUsage().getUsed()));
} finally {
for (long entry : blobs) {
CodeCacheUtils.WB.freeCodeBlob(entry);
}
}
System.out.printf("INFO: Scenario finished successfully for %s%n",
bean.getName());
}
}
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