[
https://issues.apache.org/jira/browse/HIVE-21732?focusedWorklogId=245335&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-245335
]
ASF GitHub Bot logged work on HIVE-21732:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 20/May/19 17:01
Start Date: 20/May/19 17:01
Worklog Time Spent: 10m
Work Description: odraese commented on pull request #634: HIVE-21732:
Configurable injection of latency for LLAP task execution
URL: https://github.com/apache/hive/pull/634#discussion_r285685088
##########
File path:
llap-server/src/java/org/apache/hadoop/hive/llap/daemon/impl/LlapLoadGeneratorService.java
##########
@@ -0,0 +1,98 @@
+/*
+ * 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.hive.llap.daemon.impl;
+
+import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.hive.conf.HiveConf;
+import org.apache.hadoop.service.AbstractService;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.net.InetAddress;
+import java.net.UnknownHostException;
+import java.util.Random;
+import java.util.concurrent.TimeUnit;
+
+/**
+ * Extra load generator service for LLAP.
+ */
+public class LlapLoadGeneratorService extends AbstractService {
+ private static final Logger LOG =
LoggerFactory.getLogger(LlapLoadGeneratorService.class);
+ private long interval;
+ private float threshold;
+ private String[] victimsHostName;
+ private Thread[] threads;
+
+ public LlapLoadGeneratorService() {
+ super("LlapLoadGeneratorService");
+ }
+
+ @Override
+ protected void serviceInit(Configuration conf) throws Exception {
+ super.serviceInit(conf);
+ threshold = HiveConf.getFloatVar(conf,
HiveConf.ConfVars.HIVE_TEST_LOAD_UTILIZATION);
+ victimsHostName = HiveConf.getTrimmedStringsVar(conf,
HiveConf.ConfVars.HIVE_TEST_LOAD_HOSTNAMES);
+ interval = HiveConf.getTimeVar(conf,
HiveConf.ConfVars.HIVE_TEST_LOAD_INTERVAL, TimeUnit.MILLISECONDS);
+ LOG.info("LlapLoadGeneratorService init with {} {} {}", interval,
threshold, victimsHostName);
+ }
+
+ @Override
+ protected void serviceStart() throws UnknownHostException {
+ String localHostName = InetAddress.getLocalHost().getHostName();
+ LOG.debug("Local hostname is: {}", localHostName);
+ for (String hostName : victimsHostName) {
+ if (hostName.equalsIgnoreCase(localHostName)) {
+ LOG.debug("Starting load generator process on: {}", localHostName);
+ threads = new Thread[Runtime.getRuntime().availableProcessors()];
+ Random random = new Random();
+ for (int i = 0; i < threads.length; i++) {
+ threads[i] = new Thread(new Runnable() {
+ @Override
+ public void run() {
+ while (!Thread.interrupted()) {
+ if (random.nextFloat() <= threshold) {
+ // Keep it busy
+ long startTime = System.currentTimeMillis();
+ while (System.currentTimeMillis() - startTime < interval) {
Review comment:
Pretty much all time here is going to be spent in the kernel call
(do_gettimeofday). Should we try to actually spend some time within the Java
loop ourself?
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Issue Time Tracking
-------------------
Worklog Id: (was: 245335)
Time Spent: 4h 20m (was: 4h 10m)
> Configurable injection of load for LLAP task execution
> ------------------------------------------------------
>
> Key: HIVE-21732
> URL: https://issues.apache.org/jira/browse/HIVE-21732
> Project: Hive
> Issue Type: Test
> Reporter: Peter Vary
> Assignee: Peter Vary
> Priority: Major
> Labels: pull-request-available
> Attachments: HIVE-21732.2.patch, HIVE-21732.3.patch,
> HIVE-21732.4.patch, HIVE-21732.5.patch, HIVE-21732.6.patch, HIVE-21732.patch
>
> Time Spent: 4h 20m
> Remaining Estimate: 0h
>
> For evaluating testing, it would be good to have a configurable way to inject
> latency for LLAP tasks.
> The configuration should be able to control how much latency is injected into
> each daemon.
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