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[hat][java-mt] Fixed KernelContext init per thread in WorkStealer #955

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[hat][java-mt] Fixed KernelContext init per thread in WorkStealer #955

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25 changes: 12 additions & 13 deletions hat/core/src/main/java/hat/backend/java/WorkStealer.java
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Original file line number Diff line number Diff line change
Expand Up @@ -46,7 +46,6 @@ public class WorkStealer {
volatile int range;
volatile boolean running = true;
final int chunkSize = 1024;
private KernelContext[] ranges;

public WorkStealer(int threadCount) {
super();
Expand All @@ -55,32 +54,32 @@ public WorkStealer(int threadCount) {
if (threadCount > 1) {
taskCount = new AtomicInteger(0);
threads = new Thread[threadCount];
this.ranges = new KernelContext[threadCount];
setupBarrier = new CyclicBarrier(threadCount + 1);
startBarrier = new CyclicBarrier(threadCount + 1);
doneBarrier = new CyclicBarrier(threadCount + 1);
for (int i = 0; i < threadCount; i++) {
final int fini = i;
var ndRange1D = NDRange.of1D(range);
ranges[fini] = new KernelContext(ndRange1D);
threads[fini] = new Thread(() -> {

hat.KernelContext kernelContext = ranges[fini];
while (running) {
rendezvous(setupBarrier);
// System.out.println("Thread #"+Thread.currentThread()+" waiting start");
rendezvous(startBarrier);
// System.out.println("Thread #"+Thread.currentThread()+" started");

int myChunk;
while ((myChunk = taskCount.getAndIncrement()) < (range / chunkSize) + 1) {
for (kernelContext.gix = myChunk * chunkSize; kernelContext.gix < (myChunk + 1) * chunkSize && kernelContext.gix < range; kernelContext.gix++) {
rangeConsumer.accept(kernelContext);
var ndRange1D = NDRange.of1D(range);
hat.KernelContext kernelContext = new KernelContext(ndRange1D);
try {
int myChunk;
while ((myChunk = taskCount.getAndIncrement()) < (range / chunkSize) + 1) {
for (kernelContext.gix = myChunk * chunkSize; kernelContext.gix < (myChunk + 1) * chunkSize && kernelContext.gix < range; kernelContext.gix++) {
rangeConsumer.accept(kernelContext);
}
}
} finally {
// System.out.println("Thread #"+Thread.currentThread()+" done");
rendezvous(doneBarrier);
// System.out.println("Thread #"+Thread.currentThread()+" pastDone");
}
// System.out.println("Thread #"+Thread.currentThread()+" done");
rendezvous(doneBarrier);
// System.out.println("Thread #"+Thread.currentThread()+" pastDone");
}
});
threads[i].setDaemon(true);
Expand Down