[
https://issues.apache.org/jira/browse/YARN-11687?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17843014#comment-17843014
]
ASF GitHub Bot commented on YARN-11687:
---------------------------------------
brumi1024 commented on code in PR #6780:
URL: https://github.com/apache/hadoop/pull/6780#discussion_r1587889122
##########
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/java/org/apache/hadoop/yarn/server/nodemanager/containermanager/linux/resources/CGroupsV2ResourceCalculator.java:
##########
@@ -0,0 +1,135 @@
+/**
+ * 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.hadoop.yarn.server.nodemanager.containermanager.linux.resources;
+
+import java.io.IOException;
+import java.math.BigInteger;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.util.List;
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import org.apache.commons.io.FileUtils;
+import org.apache.commons.lang3.StringUtils;
+import org.apache.hadoop.classification.VisibleForTesting;
+import org.apache.hadoop.util.CpuTimeTracker;
+import org.apache.hadoop.yarn.exceptions.YarnException;
+
+/**
+ * A CGroupV2 file-system based Resource calculator without the process tree
features.
+ *
+ * The feature only works if cluster runs in pure V2 version, because when we
read the
+ * /proc/{pid}/cgroup file currently we can not handle multiple lines.
+ */
+public class CGroupsV2ResourceCalculator extends
AbstractCGroupsResourceCalculator {
+ private static final Logger LOG =
LoggerFactory.getLogger(CGroupsV2ResourceCalculator.class);
+ private final Map<String, String> stats = new ConcurrentHashMap<>();
+
+ @VisibleForTesting
+ String root = "/";
+
+ /**
+ * Create resource calculator for the container that has the specified pid.
+ * @param pid A pid from the cgroup or null for all containers
+ */
+ public CGroupsV2ResourceCalculator(String pid) {
+ super(pid);
+ }
+
+ @Override
+ public void initialize() throws YarnException {
+ cpuTimeTracker = new CpuTimeTracker(jiffyLengthMs);
+ cGroupsHandler = ResourceHandlerModule.getCGroupsHandler();
+ }
+
+ @Override
+ public long getCumulativeCpuTime() {
+ // https://docs.kernel.org/admin-guide/cgroup-v2.html#cpu-interface-files
+ return jiffyLengthMs < 0
+ ? UNAVAILABLE
+ : getStat("cpu.stat#usage_usec") * jiffyLengthMs;
+ }
+
+ @Override
+ public long getRssMemorySize(int olderThanAge) {
+ //
https://docs.kernel.org/admin-guide/cgroup-v2.html#memory-interface-files
+ return 1 < olderThanAge
+ ? UNAVAILABLE
+ : getStat("memory.stat#anon");
+ }
+
+ @Override
+ public long getVirtualMemorySize(int olderThanAge) {
+ //
https://docs.kernel.org/admin-guide/cgroup-v2.html#memory-interface-files
+ return 1 < olderThanAge
+ ? UNAVAILABLE
+ : getStat("memory.stat#vmalloc");
+ }
+
+ @Override
+ public void updateProcessTree() {
+ try (Stream<Path> cGroupFiles = Files.list(getCGroupPath())){
+ List<Path> statFiles = cGroupFiles
+ .filter(path -> path.toString().endsWith(".stat"))
+ .collect(Collectors.toList());
+ for (Path statFile : statFiles) {
+ String[] lines = fileToString(statFile).split(System.lineSeparator());
+ for (String line: lines) {
+ String[] parts = line.split(" ");
+ stats.put(statFile.getFileName() + "#" + parts[0], parts[1]);
+ }
+ }
+ cpuTimeTracker.updateElapsedJiffies(
+ BigInteger.valueOf(getStat("cpu.stat#usage_usec")), clock.getTime());
Review Comment:
`cpu.stat#usage_usec` could be a final string.
> Update CGroupsResourceCalculator to track usages using cgroupv2
> ---------------------------------------------------------------
>
> Key: YARN-11687
> URL: https://issues.apache.org/jira/browse/YARN-11687
> Project: Hadoop YARN
> Issue Type: Sub-task
> Reporter: Benjamin Teke
> Assignee: Bence Kosztolnik
> Priority: Major
> Labels: pull-request-available
>
> [CGroupsResourceCalculator|https://github.com/apache/hadoop/blob/f609460bda0c2bd87dd3580158e549e2f34f14d5/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/java/org/apache/hadoop/yarn/server/nodemanager/containermanager/linux/resources/CGroupsResourceCalculator.java]
> should also be updated to handle the cgroup v2 changes.
--
This message was sent by Atlassian Jira
(v8.20.10#820010)
---------------------------------------------------------------------
To unsubscribe, e-mail: yarn-issues-unsubscr...@hadoop.apache.org
For additional commands, e-mail: yarn-issues-h...@hadoop.apache.org
