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
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
|
package spark.scheduler
import org.scalatest.FunSuite
import org.scalatest.BeforeAndAfter
import spark._
import spark.scheduler._
import spark.scheduler.cluster._
import scala.collection.mutable.ArrayBuffer
import scala.collection.mutable.{ConcurrentMap, HashMap}
import java.util.concurrent.Semaphore
import java.util.concurrent.CountDownLatch
import java.util.Properties
class Lock() {
var finished = false
def jobWait() = {
synchronized {
while(!finished) {
this.wait()
}
}
}
def jobFinished() = {
synchronized {
finished = true
this.notifyAll()
}
}
}
object TaskThreadInfo {
val threadToLock = HashMap[Int, Lock]()
val threadToRunning = HashMap[Int, Boolean]()
val threadToStarted = HashMap[Int, CountDownLatch]()
}
/*
* 1. each thread contains one job.
* 2. each job contains one stage.
* 3. each stage only contains one task.
* 4. each task(launched) must be lanched orderly(using threadToStarted) to make sure
* it will get cpu core resource, and will wait to finished after user manually
* release "Lock" and then cluster will contain another free cpu cores.
* 5. each task(pending) must use "sleep" to make sure it has been added to taskSetManager queue,
* thus it will be scheduled later when cluster has free cpu cores.
*/
class LocalSchedulerSuite extends FunSuite with LocalSparkContext {
def createThread(threadIndex: Int, poolName: String, sc: SparkContext, sem: Semaphore) {
TaskThreadInfo.threadToRunning(threadIndex) = false
val nums = sc.parallelize(threadIndex to threadIndex, 1)
TaskThreadInfo.threadToLock(threadIndex) = new Lock()
TaskThreadInfo.threadToStarted(threadIndex) = new CountDownLatch(1)
new Thread {
if (poolName != null) {
sc.addLocalProperties("spark.scheduler.cluster.fair.pool",poolName)
}
override def run() {
val ans = nums.map(number => {
TaskThreadInfo.threadToRunning(number) = true
TaskThreadInfo.threadToStarted(number).countDown()
TaskThreadInfo.threadToLock(number).jobWait()
TaskThreadInfo.threadToRunning(number) = false
number
}).collect()
assert(ans.toList === List(threadIndex))
sem.release()
}
}.start()
}
test("Local FIFO scheduler end-to-end test") {
System.setProperty("spark.cluster.schedulingmode", "FIFO")
sc = new SparkContext("local[4]", "test")
val sem = new Semaphore(0)
createThread(1,null,sc,sem)
TaskThreadInfo.threadToStarted(1).await()
createThread(2,null,sc,sem)
TaskThreadInfo.threadToStarted(2).await()
createThread(3,null,sc,sem)
TaskThreadInfo.threadToStarted(3).await()
createThread(4,null,sc,sem)
TaskThreadInfo.threadToStarted(4).await()
// thread 5 and 6 (stage pending)must meet following two points
// 1. stages (taskSetManager) of jobs in thread 5 and 6 should be add to taskSetManager
// queue before executing TaskThreadInfo.threadToLock(1).jobFinished()
// 2. priority of stage in thread 5 should be prior to priority of stage in thread 6
// So I just use "sleep" 1s here for each thread.
// TODO: any better solution?
createThread(5,null,sc,sem)
Thread.sleep(1000)
createThread(6,null,sc,sem)
Thread.sleep(1000)
assert(TaskThreadInfo.threadToRunning(1) === true)
assert(TaskThreadInfo.threadToRunning(2) === true)
assert(TaskThreadInfo.threadToRunning(3) === true)
assert(TaskThreadInfo.threadToRunning(4) === true)
assert(TaskThreadInfo.threadToRunning(5) === false)
assert(TaskThreadInfo.threadToRunning(6) === false)
TaskThreadInfo.threadToLock(1).jobFinished()
TaskThreadInfo.threadToStarted(5).await()
assert(TaskThreadInfo.threadToRunning(1) === false)
assert(TaskThreadInfo.threadToRunning(2) === true)
assert(TaskThreadInfo.threadToRunning(3) === true)
assert(TaskThreadInfo.threadToRunning(4) === true)
assert(TaskThreadInfo.threadToRunning(5) === true)
assert(TaskThreadInfo.threadToRunning(6) === false)
TaskThreadInfo.threadToLock(3).jobFinished()
TaskThreadInfo.threadToStarted(6).await()
assert(TaskThreadInfo.threadToRunning(1) === false)
assert(TaskThreadInfo.threadToRunning(2) === true)
assert(TaskThreadInfo.threadToRunning(3) === false)
assert(TaskThreadInfo.threadToRunning(4) === true)
assert(TaskThreadInfo.threadToRunning(5) === true)
assert(TaskThreadInfo.threadToRunning(6) === true)
TaskThreadInfo.threadToLock(2).jobFinished()
TaskThreadInfo.threadToLock(4).jobFinished()
TaskThreadInfo.threadToLock(5).jobFinished()
TaskThreadInfo.threadToLock(6).jobFinished()
sem.acquire(6)
}
test("Local fair scheduler end-to-end test") {
sc = new SparkContext("local[8]", "LocalSchedulerSuite")
val sem = new Semaphore(0)
System.setProperty("spark.cluster.schedulingmode", "FAIR")
val xmlPath = getClass.getClassLoader.getResource("fairscheduler.xml").getFile()
System.setProperty("spark.fairscheduler.allocation.file", xmlPath)
createThread(10,"1",sc,sem)
TaskThreadInfo.threadToStarted(10).await()
createThread(20,"2",sc,sem)
TaskThreadInfo.threadToStarted(20).await()
createThread(30,"3",sc,sem)
TaskThreadInfo.threadToStarted(30).await()
assert(TaskThreadInfo.threadToRunning(10) === true)
assert(TaskThreadInfo.threadToRunning(20) === true)
assert(TaskThreadInfo.threadToRunning(30) === true)
createThread(11,"1",sc,sem)
TaskThreadInfo.threadToStarted(11).await()
createThread(21,"2",sc,sem)
TaskThreadInfo.threadToStarted(21).await()
createThread(31,"3",sc,sem)
TaskThreadInfo.threadToStarted(31).await()
assert(TaskThreadInfo.threadToRunning(11) === true)
assert(TaskThreadInfo.threadToRunning(21) === true)
assert(TaskThreadInfo.threadToRunning(31) === true)
createThread(12,"1",sc,sem)
TaskThreadInfo.threadToStarted(12).await()
createThread(22,"2",sc,sem)
TaskThreadInfo.threadToStarted(22).await()
createThread(32,"3",sc,sem)
assert(TaskThreadInfo.threadToRunning(12) === true)
assert(TaskThreadInfo.threadToRunning(22) === true)
assert(TaskThreadInfo.threadToRunning(32) === false)
TaskThreadInfo.threadToLock(10).jobFinished()
TaskThreadInfo.threadToStarted(32).await()
assert(TaskThreadInfo.threadToRunning(32) === true)
//1. Similar with above scenario, sleep 1s for stage of 23 and 33 to be added to taskSetManager
// queue so that cluster will assign free cpu core to stage 23 after stage 11 finished.
//2. priority of 23 and 33 will be meaningless as using fair scheduler here.
createThread(23,"2",sc,sem)
createThread(33,"3",sc,sem)
Thread.sleep(1000)
TaskThreadInfo.threadToLock(11).jobFinished()
TaskThreadInfo.threadToStarted(23).await()
assert(TaskThreadInfo.threadToRunning(23) === true)
assert(TaskThreadInfo.threadToRunning(33) === false)
TaskThreadInfo.threadToLock(12).jobFinished()
TaskThreadInfo.threadToStarted(33).await()
assert(TaskThreadInfo.threadToRunning(33) === true)
TaskThreadInfo.threadToLock(20).jobFinished()
TaskThreadInfo.threadToLock(21).jobFinished()
TaskThreadInfo.threadToLock(22).jobFinished()
TaskThreadInfo.threadToLock(23).jobFinished()
TaskThreadInfo.threadToLock(30).jobFinished()
TaskThreadInfo.threadToLock(31).jobFinished()
TaskThreadInfo.threadToLock(32).jobFinished()
TaskThreadInfo.threadToLock(33).jobFinished()
sem.acquire(11)
}
}
|