xtern commented on a change in pull request #7941: URL: https://github.com/apache/ignite/pull/7941#discussion_r496509085
########## File path: modules/core/src/test/java/org/apache/ignite/internal/util/BasicRateLimiterTest.java ########## @@ -0,0 +1,119 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. + * The ASF licenses this file to You 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 org.apache.ignite.internal.util; + +import java.util.concurrent.CyclicBarrier; +import java.util.concurrent.atomic.AtomicInteger; +import org.apache.ignite.internal.IgniteInternalFuture; +import org.apache.ignite.internal.IgniteInterruptedCheckedException; +import org.apache.ignite.testframework.GridTestUtils; +import org.junit.Test; + +import static java.util.concurrent.TimeUnit.MILLISECONDS; +import static java.util.concurrent.TimeUnit.SECONDS; +import static org.junit.Assert.assertEquals; + +/** + * Rate limiter tests. + */ +public class BasicRateLimiterTest { + /** + * Check rate limit with multiple threads. + */ + @Test + public void checkLimitMultithreaded() throws Exception { + int opsPerSec = 1_000; + int totalOps = 10_000; + + BasicRateLimiter limiter = new BasicRateLimiter(opsPerSec); + + int threads = Runtime.getRuntime().availableProcessors(); + + CyclicBarrier ready = new CyclicBarrier(threads + 1); + + AtomicInteger cntr = new AtomicInteger(); + + IgniteInternalFuture<Long> fut = GridTestUtils.runMultiThreadedAsync(() -> { + ready.await(); + + do { + limiter.acquire(1); + } + while (!Thread.currentThread().isInterrupted() && cntr.incrementAndGet() < totalOps); + + return null; + }, threads, "worker"); + + ready.await(); + + long startTime = System.currentTimeMillis(); + + fut.get(); + + long timeSpent = System.currentTimeMillis() - startTime; + + assertEquals(totalOps / opsPerSec, SECONDS.convert(timeSpent, MILLISECONDS)); + } + + /** + * Check that the average speed is limited correctly even if we are acquiring more permits than allowed per second. + */ + @Test + public void checkAcquireWithOverflow() throws IgniteInterruptedCheckedException { + double permitsPerSec = 0.5; + int permitsPerOp = 1; + int totalOps = 5; + + BasicRateLimiter limiter = new BasicRateLimiter(permitsPerSec); + + long startTime = System.currentTimeMillis(); + + for (int i = 0; i <= totalOps; i++) Review comment: Ratelimiter targets for an average rate of permits per second, these tests have been reworked. To prevent instability of tests, I added a 50% error probability (in general, the error does not exceed 20%). ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: [email protected]
