dawidwys commented on a change in pull request #32: URL: https://github.com/apache/flink-benchmarks/pull/32#discussion_r721193956
########## File path: src/main/java/org/apache/flink/benchmark/CheckpointingTimeBenchmark.java ########## @@ -0,0 +1,291 @@ +/* + * 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.flink.benchmark; + +import org.apache.flink.api.common.JobID; +import org.apache.flink.api.common.functions.MapFunction; +import org.apache.flink.api.common.time.Deadline; +import org.apache.flink.benchmark.operators.RecordSource; +import org.apache.flink.benchmark.operators.RecordSource.Record; +import org.apache.flink.configuration.Configuration; +import org.apache.flink.configuration.MemorySize; +import org.apache.flink.configuration.TaskManagerOptions; +import org.apache.flink.configuration.UnmodifiableConfiguration; +import org.apache.flink.core.execution.JobClient; +import org.apache.flink.runtime.jobgraph.JobVertexID; +import org.apache.flink.runtime.rest.RestClient; +import org.apache.flink.runtime.rest.messages.EmptyRequestBody; +import org.apache.flink.runtime.rest.messages.JobVertexBackPressureHeaders; +import org.apache.flink.runtime.rest.messages.JobVertexBackPressureInfo; +import org.apache.flink.runtime.rest.messages.JobVertexMessageParameters; +import org.apache.flink.runtime.testutils.CommonTestUtils; +import org.apache.flink.streaming.api.CheckpointingMode; +import org.apache.flink.streaming.api.datastream.DataStreamSource; +import org.apache.flink.streaming.api.environment.ExecutionCheckpointingOptions; +import org.apache.flink.streaming.api.functions.sink.SinkFunction; +import org.apache.flink.util.FlinkRuntimeException; +import org.apache.flink.util.concurrent.ExecutorThreadFactory; + +import org.openjdk.jmh.annotations.Benchmark; +import org.openjdk.jmh.annotations.BenchmarkMode; +import org.openjdk.jmh.annotations.Fork; +import org.openjdk.jmh.annotations.Measurement; +import org.openjdk.jmh.annotations.Mode; +import org.openjdk.jmh.annotations.OutputTimeUnit; +import org.openjdk.jmh.annotations.Param; +import org.openjdk.jmh.annotations.Scope; +import org.openjdk.jmh.annotations.State; +import org.openjdk.jmh.annotations.Warmup; +import org.openjdk.jmh.runner.Runner; +import org.openjdk.jmh.runner.RunnerException; +import org.openjdk.jmh.runner.options.Options; +import org.openjdk.jmh.runner.options.OptionsBuilder; +import org.openjdk.jmh.runner.options.VerboseMode; + +import java.net.URI; +import java.time.Duration; +import java.time.temporal.ChronoUnit; +import java.util.concurrent.CompletableFuture; +import java.util.concurrent.Executors; +import java.util.function.Function; + +import static java.util.concurrent.TimeUnit.MILLISECONDS; +import static java.util.concurrent.TimeUnit.SECONDS; +import static org.apache.flink.api.common.eventtime.WatermarkStrategy.noWatermarks; + +/** + * The test verifies that the debloating kicks in and properly downsizes buffers. In the end the + * checkpoint should take ~2(number of rebalance) * DEBLOATING_TARGET. + * + * <p>Some info about the chosen numbers: + * + * <ul> + * <li>The minimal memory segment size is decreased (256b) so that the scaling possibility is + * higher. Memory segments start with 4kb + * <li>A memory segment of the minimal size fits ~3 records (of size 64b), each record takes ~1ms + * to be processed by the sink + * <li>We have 2 (exclusive buffers) * 4 (parallelism) + 8 floating = 64 buffers per gate, with + * 300 ms debloating target and ~1ms/record processing speed, we can buffer 300/64 = ~4.5 + * records in a buffer after debloating which means the size of a buffer is slightly above the + * minimal memory segment size. + * <li>The buffer debloating target of 300ms means a checkpoint should take ~2(number of + * exchanges)*300ms=~600ms + * </ul> + */ +@OutputTimeUnit(SECONDS) Review comment: I don't think `ops/ms` is a good idea. For e.g. `ALIGNED` case (~600-800ms/checkpoint) it goes below 0.001 op/ms, which I think is the lowest granularity for jmh (unless there is some magic setting I am not aware of). -- 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. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
