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Autodetect number of threads (remove setting). Fix some bugs.

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This commit is contained in:
Henrik Rydgård
2021-06-12 21:06:59 +02:00
parent 03c79ae055
commit 0fa27ff9d7
14 changed files with 112 additions and 40 deletions
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Common/Thread/ParallelLoop.cpp
+11 -4
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@@ -1,6 +1,7 @@
#include <cstring>
#include "ParallelLoop.h"
#include "Common/Thread/ParallelLoop.h"
#include "Common/CPUDetect.h"
class LoopRangeTask : public Task {
public:
@@ -24,7 +25,6 @@ WaitableCounter *ParallelRangeLoopWaitable(ThreadManager *threadMan, const std::
minSize = 1;
}
// TODO: Optimize using minSize.
int numTasks = threadMan->GetNumLooperThreads();
int range = upper - lower;
@@ -37,7 +37,7 @@ WaitableCounter *ParallelRangeLoopWaitable(ThreadManager *threadMan, const std::
// Just assign one task per thread, as many as we have.
WaitableCounter *counter = new WaitableCounter(range);
for (int i = 0; i < range; i++) {
threadMan->EnqueueTaskOnThread(i, new LoopRangeTask(counter, loop, i, i + 1));
threadMan->EnqueueTaskOnThread(i, new LoopRangeTask(counter, loop, i, i + 1), TaskType::CPU_COMPUTE);
}
return counter;
} else {
@@ -50,7 +50,7 @@ WaitableCounter *ParallelRangeLoopWaitable(ThreadManager *threadMan, const std::
int start = lastEnd;
d += dx;
int end = i == numTasks - 1 ? range : (int)d;
threadMan->EnqueueTaskOnThread(i, new LoopRangeTask(counter, loop, start, end));
threadMan->EnqueueTaskOnThread(i, new LoopRangeTask(counter, loop, start, end), TaskType::CPU_COMPUTE);
lastEnd = end;
}
return counter;
@@ -58,6 +58,13 @@ WaitableCounter *ParallelRangeLoopWaitable(ThreadManager *threadMan, const std::
}
void ParallelRangeLoop(ThreadManager *threadMan, const std::function<void(int, int)> &loop, int lower, int upper, int minSize) {
if (cpu_info.num_cores == 1) {
// "Optimization" for single-core devices.
// No point in adding threading overhead, let's just do it inline.
loop(lower, upper);
return;
}
if (minSize == -1) {
minSize = 4;
}