use of org.apache.flink.configuration.TaskManagerOptions.BUFFER_DEBLOAT_PERIOD in project flink by apache.
the class StreamTaskTest method testBufferSizeRecalculationStartSuccessfully.
@Test
public void testBufferSizeRecalculationStartSuccessfully() throws Exception {
int expectedThroughput = 13333;
int inputChannels = 3;
// debloat period doesn't matter, we will schedule debloating manually
Configuration config = new Configuration().set(BUFFER_DEBLOAT_PERIOD, Duration.ofHours(10)).set(BUFFER_DEBLOAT_TARGET, Duration.ofSeconds(1)).set(BUFFER_DEBLOAT_THRESHOLD_PERCENTAGES, 1).set(BUFFER_DEBLOAT_ENABLED, true);
try (StreamTaskMailboxTestHarness<String> harness = new StreamTaskMailboxTestHarnessBuilder<>(OneInputStreamTask::new, STRING_TYPE_INFO).setTaskManagerRuntimeInfo(new TestingTaskManagerRuntimeInfo(config)).addInput(STRING_TYPE_INFO, inputChannels).addInput(STRING_TYPE_INFO, inputChannels).modifyGateBuilder(gateBuilder -> gateBuilder.setThroughputCalculator(bufferDebloatConfiguration -> new ThroughputCalculator(SystemClock.getInstance()) {
@Override
public long calculateThroughput() {
return expectedThroughput;
}
})).setupOutputForSingletonOperatorChain(new TestBoundedOneInputStreamOperator()).build()) {
harness.processAll();
harness.streamTask.debloat();
long lastBufferSize = -1;
for (InputGate inputGate : harness.streamTask.getEnvironment().getAllInputGates()) {
for (int i = 0; i < inputGate.getNumberOfInputChannels(); i++) {
long currentBufferSize = ((TestInputChannel) inputGate.getChannel(i)).getCurrentBufferSize();
assertThat(currentBufferSize, lessThan(MEMORY_SEGMENT_SIZE.defaultValue().getBytes()));
assertThat(currentBufferSize, greaterThan(0L));
if (lastBufferSize > 0) {
assertThat(lastBufferSize, is(currentBufferSize));
}
lastBufferSize = currentBufferSize;
}
}
}
}
use of org.apache.flink.configuration.TaskManagerOptions.BUFFER_DEBLOAT_PERIOD in project flink by apache.
the class StreamTaskTest method testBufferDebloatingMultiGates.
@Test
public void testBufferDebloatingMultiGates() throws Exception {
// debloat period doesn't matter, we will schedule debloating manually
Configuration config = new Configuration().set(BUFFER_DEBLOAT_PERIOD, Duration.ofHours(10)).set(BUFFER_DEBLOAT_TARGET, Duration.ofSeconds(1)).set(BUFFER_DEBLOAT_ENABLED, true).set(BUFFER_DEBLOAT_THRESHOLD_PERCENTAGES, // disable the threshold to achieve exact buffer sizes
0);
final long throughputGate1 = 1024L;
final long throughputGate2 = 60 * 1024L;
final int inputChannelsGate1 = 1;
final int inputChannelsGate2 = 4;
final ThroughputCalculator throughputCalculator = new ThroughputCalculator(SystemClock.getInstance()) {
/* parameters are ignored */
private int callCount = 0;
@Override
public long calculateThroughput() {
if (callCount++ % 2 == 0) {
return throughputGate1;
} else {
return throughputGate2;
}
}
};
try (StreamTaskMailboxTestHarness<String> harness = new StreamTaskMailboxTestHarnessBuilder<>(OneInputStreamTask::new, STRING_TYPE_INFO).setTaskManagerRuntimeInfo(new TestingTaskManagerRuntimeInfo(config)).addInput(STRING_TYPE_INFO, inputChannelsGate1).addInput(STRING_TYPE_INFO, inputChannelsGate2).modifyGateBuilder(gateBuilder -> gateBuilder.setThroughputCalculator(bufferDebloatConfiguration -> throughputCalculator)).setupOutputForSingletonOperatorChain(new TestBoundedOneInputStreamOperator()).build()) {
final IndexedInputGate[] inputGates = harness.streamTask.getEnvironment().getAllInputGates();
harness.processAll();
// call debloating until the EMA reaches the target buffer size
while (getCurrentBufferSize(inputGates[0]) == 0 || getCurrentBufferSize(inputGates[0]) > throughputGate1) {
harness.streamTask.debloat();
}
assertThat(getCurrentBufferSize(inputGates[0]), equalTo((int) throughputGate1));
assertThat(getCurrentBufferSize(inputGates[1]), equalTo((int) throughputGate2 / inputChannelsGate2));
}
}
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