1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
|
// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.container.handler.threadpool;
import com.yahoo.component.annotation.Inject;
import com.yahoo.component.AbstractComponent;
import com.yahoo.concurrent.ThreadFactoryFactory;
import com.yahoo.container.protect.ProcessTerminator;
import com.yahoo.jdisc.Metric;
import java.util.concurrent.ArrayBlockingQueue;
import java.util.concurrent.BlockingQueue;
import java.util.concurrent.Executor;
import java.util.concurrent.SynchronousQueue;
import java.util.concurrent.TimeUnit;
import java.util.logging.Logger;
/**
* Default implementation of {@link ContainerThreadPool}.
*
* @author Steinar Knutsen
* @author baldersheim
* @author bratseth
* @author bjorncs
*/
public class ContainerThreadpoolImpl extends AbstractComponent implements AutoCloseable, ContainerThreadPool {
private static final Logger log = Logger.getLogger(ContainerThreadpoolImpl.class.getName());
private static final int MIN_QUEUE_SIZE = 650;
private static final int MIN_THREADS_WHEN_SCALE_FACTOR = 8;
private final ExecutorServiceWrapper threadpool;
@Inject
public ContainerThreadpoolImpl(ContainerThreadpoolConfig config, Metric metric) {
this(config, metric, new ProcessTerminator());
}
public ContainerThreadpoolImpl(ContainerThreadpoolConfig config, Metric metric, ProcessTerminator processTerminator) {
this(config, metric, processTerminator, Runtime.getRuntime().availableProcessors());
}
ContainerThreadpoolImpl(ContainerThreadpoolConfig config, Metric metric, ProcessTerminator processTerminator,
int cpus) {
String name = config.name();
int maxThreads = maxThreads(config, cpus);
int minThreads = minThreads(config, maxThreads, cpus);
int queueSize = queueSize(config, maxThreads);
log.info(String.format("Threadpool '%s': min=%d, max=%d, queue=%d", name, minThreads, maxThreads, queueSize));
ThreadPoolMetric threadPoolMetric = new ThreadPoolMetric(metric, name);
WorkerCompletionTimingThreadPoolExecutor executor =
new WorkerCompletionTimingThreadPoolExecutor(minThreads, maxThreads,
(long) config.keepAliveTime() * 1000, TimeUnit.MILLISECONDS,
createQueue(queueSize),
ThreadFactoryFactory.getThreadFactory(name),
threadPoolMetric);
// Prestart needed, if not all threads will be created by the fist N tasks and hence they might also
// get the dreaded thread locals initialized even if they will never run.
// That counters what we want to achieve with the Q that will prefer thread locality.
executor.prestartAllCoreThreads();
threadpool = new ExecutorServiceWrapper(
executor, threadPoolMetric, processTerminator, config.maxThreadExecutionTimeSeconds() * 1000L,
name);
}
@Override public Executor executor() { return threadpool; }
@Override public void close() { closeInternal(); }
@Override public void deconstruct() { closeInternal(); super.deconstruct(); }
/**
* Shutdown the thread pool, give a grace period of 1 second before forcibly
* shutting down all worker threads.
*/
private void closeInternal() {
boolean terminated;
threadpool.shutdown();
try {
terminated = threadpool.awaitTermination(1, TimeUnit.SECONDS);
} catch (InterruptedException e) {
Thread.currentThread().interrupt();
return;
}
if (!terminated) {
threadpool.shutdownNow();
}
}
private static BlockingQueue<Runnable> createQueue(int size) {
return size == 0 ? new SynchronousQueue<>(false) : new ArrayBlockingQueue<>(size);
}
private static int maxThreads(ContainerThreadpoolConfig config, int cpus) {
if (config.maxThreads() > 0) return config.maxThreads();
else if (config.maxThreads() == 0) return 4 * cpus;
else return Math.max(MIN_THREADS_WHEN_SCALE_FACTOR, Math.abs(config.maxThreads()) * cpus);
}
private static int minThreads(ContainerThreadpoolConfig config, int max, int cpus) {
int threads;
if (config.minThreads() > 0) threads = config.minThreads();
else if (config.minThreads() == 0) threads = 4 * cpus;
else threads = Math.max(MIN_THREADS_WHEN_SCALE_FACTOR, Math.abs(config.minThreads()) * cpus);
return Math.min(threads, max);
}
private int queueSize(ContainerThreadpoolConfig config, int maxThreads) {
return config.queueSize() >= 0 ? config.queueSize() : Math.max(MIN_QUEUE_SIZE, Math.abs(config.queueSize()) * maxThreads);
}
}
|
