Examples with Sampler org.spf4j.stackmonitor.Sampler used on opensource projects

Example 1 with Sampler

use of org.spf4j.stackmonitor.Sampler in project spf4j by zolyfarkas.

the class LifoThreadPoolExecutorCoreIdlingTest method testLifoExecSQMutable.

@Test
public void testLifoExecSQMutable() throws InterruptedException, IOException {
    MutableLifoThreadPoolExecutorSQP executor = new MutableLifoThreadPoolExecutorSQP("test", 2, 8, 20, 1024, 0);
    Sampler s = Sampler.getSampler(20, 10000, new File(org.spf4j.base.Runtime.TMP_FOLDER), "lifeTest1");
    s.start();
    org.spf4j.base.Runtime.gc(5000);
    Thread.sleep(100);
    long time = CpuUsageSampler.getProcessCpuTimeNanos();
    Thread.sleep(3000);
    long cpuTime = CpuUsageSampler.getProcessCpuTimeNanos() - time;
    LOG.info("Cpu profile saved to {}", s.dumpToFile());
    LOG.debug("CPU time = {} ns", cpuTime);
    s.stop();
    // 6069497000 with bug  53945000 without bug
    Assert.assertTrue("CPU Time = " + cpuTime, cpuTime < 1500000000);
    executor.shutdown();
    executor.awaitTermination(1, TimeUnit.SECONDS);
}

Example 2 with Sampler

use of org.spf4j.stackmonitor.Sampler in project spf4j by zolyfarkas.

the class JdbcSemaphoreTest method testPerformance.

@Test
@Ignore
public void testPerformance() throws SQLException, IOException, InterruptedException, ExecutionException, TimeoutException {
    int port = PORT.getAndIncrement();
    Server server = Server.createTcpServer(new String[] { "-tcpPort", Integer.toString(port), "-ifNotExists" }).start();
    try {
        File tempDB = File.createTempFile("test", "h2db");
        tempDB.deleteOnExit();
        String connStr = "jdbc:h2:tcp://localhost:" + port + "/nio:" + tempDB.getAbsolutePath() + ";AUTO_SERVER=TRUE";
        JdbcDataSource ds = new JdbcDataSource();
        ds.setURL(connStr);
        ds.setUser("sa");
        ds.setPassword("sa");
        createSchemaObjects(ds);
        JdbcSemaphore semaphore = new JdbcSemaphore(ds, "test_sem2", 1, true);
        Sampler s = new Sampler(5, 5000);
        s.registerJmx();
        s.start();
        LOG.info("started sampling");
        long deadline = TimeSource.nanoTime() + TimeUnit.SECONDS.toNanos(10);
        do {
            semaphore.acquire(1, 1, TimeUnit.SECONDS);
            semaphore.release();
        } while (deadline > TimeSource.nanoTime());
        semaphore.close();
        s.stop();
        LOG.debug("dumped samples to {}", s.dumpToFile());
    } finally {
        JdbcHeartBeat.stopHeartBeats();
        server.shutdown();
    }
}

Example 3 with Sampler

use of org.spf4j.stackmonitor.Sampler in project spf4j by zolyfarkas.

the class LifoThreadPoolExecutorInterruptingTest method testLifoExecSQ2.

@Test(timeout = 60000)
public void testLifoExecSQ2() throws InterruptedException, IOException, ExecutionException {
    LifoThreadPoolExecutorSQP executor = new LifoThreadPoolExecutorSQP("test", 2, 8, 20, 0);
    File destFolder = new File(org.spf4j.base.Runtime.TMP_FOLDER);
    Sampler s = Sampler.getSampler(20, 10000, destFolder, "lifeTest1");
    s.start();
    org.spf4j.base.Runtime.gc(5000);
    List<Runnable> running = executor.shutdownNow();
    Assert.assertTrue(running.isEmpty());
    Thread.sleep(100);
    long time = CpuUsageSampler.getProcessCpuTimeNanos();
    Thread.sleep(3000);
    long cpuTime = CpuUsageSampler.getProcessCpuTimeNanos() - time;
    File dumpToFile = s.dumpToFile();
    Assert.assertEquals(destFolder.getCanonicalFile(), dumpToFile.getParentFile().getCanonicalFile());
    LOG.info("Cpu profile saved to {}", dumpToFile);
    LOG.debug("CPU time = {} ns", cpuTime);
    s.stop();
    Assert.assertTrue("CPU Time = " + cpuTime, cpuTime < 1500000000);
    // 3260523000 with bug  148672000 without bug with profiler
    executor.shutdown();
    executor.awaitTermination(1, TimeUnit.SECONDS);
}

Example 4 with Sampler

use of org.spf4j.stackmonitor.Sampler in project spf4j by zolyfarkas.

the class LifoThreadPoolExecutorInterruptingTest method testLifoExecSQ.

@Test(timeout = 60000)
public void testLifoExecSQ() throws InterruptedException, IOException, ExecutionException {
    LifoThreadPoolExecutorSQP executor = new LifoThreadPoolExecutorSQP("test", 2, 8, 20, 0);
    File destFolder = new File(org.spf4j.base.Runtime.TMP_FOLDER);
    Sampler s = Sampler.getSampler(20, 10000, destFolder, "lifeTest1");
    s.start();
    org.spf4j.base.Runtime.gc(5000);
    ArrayBlockingQueue<Thread> q = new ArrayBlockingQueue<>(1);
    Future<Object> f = executor.submit(() -> {
        q.put(Thread.currentThread());
        return null;
    });
    q.take().interrupt();
    Assert.assertNull(f.get());
    Thread.sleep(100);
    long time = CpuUsageSampler.getProcessCpuTimeNanos();
    Thread.sleep(3000);
    long cpuTime = CpuUsageSampler.getProcessCpuTimeNanos() - time;
    File dumpToFile = s.dumpToFile();
    Assert.assertEquals(destFolder.getCanonicalFile(), dumpToFile.getParentFile().getCanonicalFile());
    LOG.info("Cpu profile saved to {}", dumpToFile);
    LOG.debug("CPU time = {} ns", cpuTime);
    s.stop();
    Assert.assertTrue("CPU Time = " + cpuTime, cpuTime < 1500000000);
    // 3260523000 with bug  148672000 without bug with profiler
    executor.shutdown();
    executor.awaitTermination(1, TimeUnit.SECONDS);
}

Example 5 with Sampler

use of org.spf4j.stackmonitor.Sampler in project spf4j by zolyfarkas.

the class DecentSemaphoreHandler method main.

@SuppressFBWarnings("MDM_THREAD_YIELD")
public static void main(final String[] args) throws InterruptedException, TimeoutException, SQLException, IOException {
    String connectionString = args[0];
    String semaphoreName = args[1];
    JdbcDataSource ds = new JdbcDataSource();
    ds.setURL(connectionString);
    ds.setUser("sa");
    ds.setPassword("sa");
    Sampler s = new Sampler(5, 10000);
    s.registerJmx();
    s.start();
    LOG.info("started sampling");
    JdbcSemaphore semaphore = new JdbcSemaphore(ds, semaphoreName, 3);
    for (int i = 0; i < 50; i++) {
        semaphore.acquire(1, 1L, TimeUnit.SECONDS);
        Thread.sleep((long) (Math.random() * 10) + 10);
        LOG.info("beat");
        Thread.sleep((long) (Math.random() * 10) + 10);
        semaphore.release();
    }
    semaphore.close();
    File dumpToFile = s.dumpToFile();
    LOG.info("stack samples dumped to {}", dumpToFile);
    s.stop();
    System.exit(0);
}