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test/hotspot/jtreg/runtime/CompressedOops/CompressedClassSpaceSize.java

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 57 /*
 58  * @test id=valid_large_cds
 59  * @bug 8022865
 60  * @summary Tests for the -XX:CompressedClassSpaceSize command line option
 61  * @requires vm.bits == 64 & vm.opt.final.UseCompressedOops == true & vm.cds
 62  * @requires vm.flagless
 63  * @library /test/lib
 64  * @modules java.base/jdk.internal.misc java.management
 65  * @run driver CompressedClassSpaceSize valid_large_cds
 66  */
 67 
 68 import jdk.test.lib.process.ProcessTools;
 69 import jdk.test.lib.process.OutputAnalyzer;
 70 
 71 public class CompressedClassSpaceSize {
 72 
 73     final static long MB = 1024 * 1024;
 74 
 75     final static long minAllowedClassSpaceSize = MB;
 76     final static long minRealClassSpaceSize = 16 * MB;
 77     final static long maxClassSpaceSize = 4096 * MB;
 78 
 79     // For the valid_large_cds sub test: we need to have a notion of what archive size to
 80     // maximally expect, with a generous fudge factor to avoid having to tweak this test
 81     // ofent. Note: today's default archives are around 16-20 MB.
 82     final static long maxExpectedArchiveSize = 512 * MB;
 83 
 84     public static void main(String[] args) throws Exception {
 85         ProcessBuilder pb;
 86         OutputAnalyzer output;
 87 
 88         switch (args[0]) {
 89             case "invalid": {
 90                 // < Minimum size
 91                 pb = ProcessTools.createLimitedTestJavaProcessBuilder("-XX:CompressedClassSpaceSize=0",
 92                         "-version");
 93                 output = new OutputAnalyzer(pb.start());
 94                 output.shouldContain("outside the allowed range")
 95                         .shouldHaveExitValue(1);
 96 
 97                 // Invalid size of -1 should be handled correctly

122                 // Note that this is **reserved** size and does not affect rss.
123                 pb = ProcessTools.createLimitedTestJavaProcessBuilder("-XX:+UnlockDiagnosticVMOptions",
124                         "-XX:CompressedClassSpaceSize=" + minAllowedClassSpaceSize,
125                         "-Xlog:gc+metaspace",
126                         "-version");
127                 output = new OutputAnalyzer(pb.start());
128                 output.shouldMatch("Compressed class space.*" + minRealClassSpaceSize)
129                         .shouldHaveExitValue(0);
130             }
131             break;
132             case "valid_large_nocds": {
133                 // Without CDS, we should get 4G
134                 pb = ProcessTools.createLimitedTestJavaProcessBuilder("-XX:CompressedClassSpaceSize=" + maxClassSpaceSize,
135                         "-Xshare:off", "-Xlog:metaspace*", "-version");
136                 output = new OutputAnalyzer(pb.start());
137                 output.shouldMatch("Compressed class space.*" + maxClassSpaceSize)
138                         .shouldHaveExitValue(0);
139             }
140             break;
141             case "valid_large_cds": {
142                 // Create archive
143                 pb = ProcessTools.createLimitedTestJavaProcessBuilder(
144                         "-XX:SharedArchiveFile=./abc.jsa", "-Xshare:dump", "-version");
145                 output = new OutputAnalyzer(pb.start());
146                 output.shouldHaveExitValue(0);

147 
148                 // With CDS, class space should fill whatever the CDS archive leaves us (modulo alignment)
149                 pb = ProcessTools.createLimitedTestJavaProcessBuilder("-XX:CompressedClassSpaceSize=" + maxClassSpaceSize,
150                         "-XX:SharedArchiveFile=./abc.jsa", "-Xshare:on", "-Xlog:metaspace*", "-version");
151                 output = new OutputAnalyzer(pb.start());
152                 output.shouldHaveExitValue(0);
153                 long reducedSize = Long.parseLong(
154                         output.firstMatch("reducing class space size from " + maxClassSpaceSize + " to (\\d+)", 1));
155                 if (reducedSize < (maxClassSpaceSize - maxExpectedArchiveSize)) {
156                     output.reportDiagnosticSummary();
157                     throw new RuntimeException("Class space size too small?");
158                 }
159                 output.shouldMatch("Compressed class space.*" + reducedSize);
160             }
161             break;
162             default:
163                 throw new RuntimeException("invalid sub test " + args[0]);
164         }
165     }
166 }

 57 /*
 58  * @test id=valid_large_cds
 59  * @bug 8022865
 60  * @summary Tests for the -XX:CompressedClassSpaceSize command line option
 61  * @requires vm.bits == 64 & vm.opt.final.UseCompressedOops == true & vm.cds
 62  * @requires vm.flagless
 63  * @library /test/lib
 64  * @modules java.base/jdk.internal.misc java.management
 65  * @run driver CompressedClassSpaceSize valid_large_cds
 66  */
 67 
 68 import jdk.test.lib.process.ProcessTools;
 69 import jdk.test.lib.process.OutputAnalyzer;
 70 
 71 public class CompressedClassSpaceSize {
 72 
 73     final static long MB = 1024 * 1024;
 74 
 75     final static long minAllowedClassSpaceSize = MB;
 76     final static long minRealClassSpaceSize = 16 * MB;
 77     final static long maxClassSpaceSize = 512 * MB;
 78 
 79     // For the valid_large_cds sub test: we need to have a notion of what archive size to
 80     // maximally expect, with a generous fudge factor to avoid having to tweak this test
 81     // ofent. Note: today's default archives are around 16-20 MB.
 82     final static long maxExpectedArchiveSize = 512 * MB;
 83 
 84     public static void main(String[] args) throws Exception {
 85         ProcessBuilder pb;
 86         OutputAnalyzer output;
 87 
 88         switch (args[0]) {
 89             case "invalid": {
 90                 // < Minimum size
 91                 pb = ProcessTools.createLimitedTestJavaProcessBuilder("-XX:CompressedClassSpaceSize=0",
 92                         "-version");
 93                 output = new OutputAnalyzer(pb.start());
 94                 output.shouldContain("outside the allowed range")
 95                         .shouldHaveExitValue(1);
 96 
 97                 // Invalid size of -1 should be handled correctly

122                 // Note that this is **reserved** size and does not affect rss.
123                 pb = ProcessTools.createLimitedTestJavaProcessBuilder("-XX:+UnlockDiagnosticVMOptions",
124                         "-XX:CompressedClassSpaceSize=" + minAllowedClassSpaceSize,
125                         "-Xlog:gc+metaspace",
126                         "-version");
127                 output = new OutputAnalyzer(pb.start());
128                 output.shouldMatch("Compressed class space.*" + minRealClassSpaceSize)
129                         .shouldHaveExitValue(0);
130             }
131             break;
132             case "valid_large_nocds": {
133                 // Without CDS, we should get 4G
134                 pb = ProcessTools.createLimitedTestJavaProcessBuilder("-XX:CompressedClassSpaceSize=" + maxClassSpaceSize,
135                         "-Xshare:off", "-Xlog:metaspace*", "-version");
136                 output = new OutputAnalyzer(pb.start());
137                 output.shouldMatch("Compressed class space.*" + maxClassSpaceSize)
138                         .shouldHaveExitValue(0);
139             }
140             break;
141             case "valid_large_cds": {
142                 // TODO: Does not currently work with +UseCompactObjectHeaders.
143                 // // Create archive
144                 // pb = ProcessTools.createLimitedTestJavaProcessBuilder(
145                 //         "-XX:SharedArchiveFile=./abc.jsa", "-Xshare:dump", "-version");
146                 // output = new OutputAnalyzer(pb.start());
147                 // output.shouldHaveExitValue(0);
148 
149                 // // With CDS, class space should fill whatever the CDS archive leaves us (modulo alignment)
150                 // pb = ProcessTools.createLimitedTestJavaProcessBuilder("-XX:CompressedClassSpaceSize=" + maxClassSpaceSize,
151                 //         "-XX:SharedArchiveFile=./abc.jsa", "-Xshare:on", "-Xlog:metaspace*", "-version");
152                 // output = new OutputAnalyzer(pb.start());
153                 // output.shouldHaveExitValue(0);
154                 // long reducedSize = Long.parseLong(
155                 //         output.firstMatch("reducing class space size from " + maxClassSpaceSize + " to (\\d+)", 1));
156                 // if (reducedSize < (maxClassSpaceSize - maxExpectedArchiveSize)) {
157                 //     output.reportDiagnosticSummary();
158                 //     throw new RuntimeException("Class space size too small?");
159                 // }
160                 // output.shouldMatch("Compressed class space.*" + reducedSize);
161             }
162             break;
163             default:
164                 throw new RuntimeException("invalid sub test " + args[0]);
165         }
166     }
167 }
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