| // Copyright 2023 The Bazel Authors. All rights reserved. |
| // |
| // 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.google.devtools.build.lib.metrics; |
| |
| import static com.google.common.truth.Truth.assertThat; |
| import static java.nio.charset.StandardCharsets.UTF_8; |
| import static org.mockito.Mockito.mock; |
| import static org.mockito.Mockito.spy; |
| import static org.mockito.Mockito.when; |
| |
| import com.google.common.collect.ImmutableMap; |
| import com.google.common.collect.ImmutableSet; |
| import java.io.ByteArrayInputStream; |
| import java.io.InputStream; |
| import org.junit.Test; |
| import org.junit.runner.RunWith; |
| import org.junit.runners.JUnit4; |
| |
| /** Unit tests for the PsInfoCollector. */ |
| @RunWith(JUnit4.class) |
| public final class PsInfoCollectorTest { |
| |
| private final PsInfoCollector spyCollector = spy(PsInfoCollector.instance()); |
| |
| @Test |
| public void testCollectStats_ignoreSpaces() { |
| String psOutput = " PID \t PPID \t RSS\n 2 1 3216 \t\n \t 3 1 \t 4096 \t"; |
| InputStream psStream = new ByteArrayInputStream(psOutput.getBytes(UTF_8)); |
| Process process = mock(Process.class); |
| when(process.getInputStream()).thenReturn(psStream); |
| |
| ImmutableMap<Long, PsInfoCollector.PsInfo> pidToPsInfo = |
| PsInfoCollector.collectDataFromPsProcess(process); |
| |
| ImmutableMap<Long, PsInfoCollector.PsInfo> expectedPidToPsInfo = |
| ImmutableMap.of( |
| 2L, |
| PsInfoCollector.PsInfo.create(2, 1, 3216), |
| 3L, |
| PsInfoCollector.PsInfo.create(3, 1, 4096)); |
| assertThat(pidToPsInfo).isEqualTo(expectedPidToPsInfo); |
| } |
| |
| @Test |
| public void testCollectStats_multipleSubprocesses() { |
| // pstree of these processes |
| // 0-+-1---3-+-7 |
| // | `-8 |
| // |-2-+-4 |
| // | `-9 |
| // |-5 |
| // `-10 |
| |
| // ps command results: |
| // PID PPID RSS |
| // 1 0 3216 |
| // 2 0 4232 |
| // 3 1 1234 |
| // 4 2 1001 |
| // 5 0 40000 |
| // 7 3 2345 |
| // 8 3 3456 |
| // 9 2 1032 |
| // 10 0 1024 |
| ImmutableMap<Long, PsInfoCollector.PsInfo> psInfos = |
| ImmutableMap.of( |
| 1L, PsInfoCollector.PsInfo.create(1, 0, 3216), |
| 2L, PsInfoCollector.PsInfo.create(2, 0, 4232), |
| 3L, PsInfoCollector.PsInfo.create(3, 1, 1234), |
| 4L, PsInfoCollector.PsInfo.create(4, 2, 1001), |
| 5L, PsInfoCollector.PsInfo.create(5, 0, 40000), |
| 7L, PsInfoCollector.PsInfo.create(7, 3, 2345), |
| 8L, PsInfoCollector.PsInfo.create(8, 3, 3456), |
| 9L, PsInfoCollector.PsInfo.create(9, 2, 1032), |
| 10L, PsInfoCollector.PsInfo.create(10, 0, 1024)); |
| ImmutableSet<Long> pids = ImmutableSet.of(1L, 2L, 5L, 6L); |
| when(spyCollector.collectDataFromPs()).thenReturn(psInfos); |
| |
| PsInfoCollector.ResourceSnapshot resourceSnapshot = spyCollector.collectResourceUsage(pids); |
| |
| ImmutableMap<Long, Integer> expectedMemoryUsageByPid = |
| ImmutableMap.of(1L, 3216 + 1234 + 2345 + 3456, 2L, 4232 + 1001 + 1032, 5L, 40000); |
| assertThat(resourceSnapshot.getPidToMemoryInKb()).isEqualTo(expectedMemoryUsageByPid); |
| } |
| } |