51 public class TestLogging {
52 private static final String[] COMMON_OPTIONS = new String[]{
53 "-Xbootclasspath/a:.", "-XX:+UseG1GC",
54 "-XX:+UnlockExperimentalVMOptions",
55 "-XX:+UnlockDiagnosticVMOptions",
56 "-XX:+WhiteBoxAPI",
57 "-XX:SurvivorRatio=1", // Survivor-to-eden ratio is 1:1
58 "-Xms10M", "-Xmx10M",
59 "-XX:MaxTenuringThreshold=1", // promote objects after first gc
60 "-XX:InitiatingHeapOccupancyPercent=0", // marking cycle happens
61 // each time
62 "-XX:G1MixedGCCountTarget=4",
63 "-XX:MaxGCPauseMillis=30000", // to have enough time
64 "-XX:G1HeapRegionSize=1m", "-XX:G1HeapWastePercent=0",
65 "-XX:G1MixedGCLiveThresholdPercent=100"};
66
67 public static final int ALLOCATION_SIZE = 20000;
68 public static final int ALLOCATION_COUNT = 15;
69
70 public static void main(String args[]) throws Exception {
71 // Test turns logging on by giving -XX:+PrintGC flag
72 test("-XX:+PrintGC");
73 // Test turns logging on by giving -XX:+PrintGCDetails
74 test("-XX:+PrintGCDetails");
75 }
76
77 private static void test(String vmFlag) throws Exception {
78 System.out.println(String.format("%s: running with %s flag", TestLogging.class.getSimpleName(), vmFlag));
79 OutputAnalyzer output = spawnMixedGCProvoker(vmFlag);
80 System.out.println(output.getStdout());
81 output.shouldHaveExitValue(0);
82 output.shouldContain("GC pause (G1 Evacuation Pause) (mixed)");
83 }
84
85 /**
86 * Method spawns MixedGCProvoker with addition flags set
87 *
88 * @parameter extraFlags -flags to be added to the common options set
89 */
90 private static OutputAnalyzer spawnMixedGCProvoker(String... extraFlags)
91 throws Exception {
92 List<String> testOpts = new ArrayList<>();
93 Collections.addAll(testOpts, COMMON_OPTIONS);
94 Collections.addAll(testOpts, extraFlags);
95 testOpts.add(MixedGCProvoker.class.getName());
96 System.out.println(testOpts);
97 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(false,
98 testOpts.toArray(new String[testOpts.size()]));
99 return new OutputAnalyzer(pb.start());
100 }
101 }
102
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51 public class TestLogging {
52 private static final String[] COMMON_OPTIONS = new String[]{
53 "-Xbootclasspath/a:.", "-XX:+UseG1GC",
54 "-XX:+UnlockExperimentalVMOptions",
55 "-XX:+UnlockDiagnosticVMOptions",
56 "-XX:+WhiteBoxAPI",
57 "-XX:SurvivorRatio=1", // Survivor-to-eden ratio is 1:1
58 "-Xms10M", "-Xmx10M",
59 "-XX:MaxTenuringThreshold=1", // promote objects after first gc
60 "-XX:InitiatingHeapOccupancyPercent=0", // marking cycle happens
61 // each time
62 "-XX:G1MixedGCCountTarget=4",
63 "-XX:MaxGCPauseMillis=30000", // to have enough time
64 "-XX:G1HeapRegionSize=1m", "-XX:G1HeapWastePercent=0",
65 "-XX:G1MixedGCLiveThresholdPercent=100"};
66
67 public static final int ALLOCATION_SIZE = 20000;
68 public static final int ALLOCATION_COUNT = 15;
69
70 public static void main(String args[]) throws Exception {
71 // Test turns logging on by giving -Xlog:gc flag
72 test("-Xlog:gc");
73 // Test turns logging on by giving -Xlog:gc=debug flag
74 test("-Xlog:gc=debug");
75 }
76
77 private static void test(String vmFlag) throws Exception {
78 System.out.println(String.format("%s: running with %s flag", TestLogging.class.getSimpleName(), vmFlag));
79 OutputAnalyzer output = spawnMixedGCProvoker(vmFlag);
80 System.out.println(output.getStdout());
81 output.shouldHaveExitValue(0);
82 output.shouldContain("Pause Mixed (G1 Evacuation Pause)");
83 }
84
85 /**
86 * Method spawns MixedGCProvoker with addition flags set
87 *
88 * @parameter extraFlags -flags to be added to the common options set
89 */
90 private static OutputAnalyzer spawnMixedGCProvoker(String... extraFlags)
91 throws Exception {
92 List<String> testOpts = new ArrayList<>();
93 Collections.addAll(testOpts, COMMON_OPTIONS);
94 Collections.addAll(testOpts, extraFlags);
95 testOpts.add(MixedGCProvoker.class.getName());
96 System.out.println(testOpts);
97 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(false,
98 testOpts.toArray(new String[testOpts.size()]));
99 return new OutputAnalyzer(pb.start());
100 }
101 }
102
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