/*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.facebook.presto.execution;
import io.airlift.units.Duration;
import org.testng.annotations.Test;
import static java.util.concurrent.TimeUnit.MILLISECONDS;
import static java.util.concurrent.TimeUnit.SECONDS;
import static org.testng.Assert.assertEquals;
public class TestSplitConcurrencyController
{
@Test
public void testRampup()
{
SplitConcurrencyController controller = new SplitConcurrencyController(1, new Duration(1, SECONDS));
for (int i = 0; i < 10; i++) {
controller.update(SECONDS.toNanos(2), 0, i + 1);
assertEquals(controller.getTargetConcurrency(), i + 2);
}
}
@Test
public void testRampdown()
{
SplitConcurrencyController controller = new SplitConcurrencyController(10, new Duration(1, SECONDS));
for (int i = 0; i < 9; i++) {
controller.update(SECONDS.toNanos(2), 1, 10 - i);
controller.splitFinished(SECONDS.toNanos(30), 1, 10 - i);
assertEquals(controller.getTargetConcurrency(), 10 - i - 1);
}
}
@Test
public void testRapidAdjustForQuickSplits()
{
SplitConcurrencyController controller = new SplitConcurrencyController(10, new Duration(1, SECONDS));
for (int i = 0; i < 9; i++) {
controller.update(MILLISECONDS.toNanos(200), 1, 10 - i);
controller.splitFinished(MILLISECONDS.toNanos(100), 1, 10 - i);
assertEquals(controller.getTargetConcurrency(), 10 - i - 1);
}
controller.update(SECONDS.toNanos(30), 0, 1);
for (int i = 0; i < 10; i++) {
controller.update(SECONDS.toNanos(200), 0, i + 1);
controller.splitFinished(MILLISECONDS.toNanos(100), 0, i + 1);
assertEquals(controller.getTargetConcurrency(), i + 2);
}
}
}