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Fix obey the "maxThreadsPerSplitPoint" setting

Spotted by Joona.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
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commit 68583f4d488578814403e0719926ae3603d43ce6 1 parent 5b35c14
@mcostalba authored
Showing with 4 additions and 4 deletions.
  1. +4 −4 src/thread.cpp
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8 src/thread.cpp
@@ -281,26 +281,26 @@ Value ThreadsManager::split(Position& pos, SearchStack* ss, Value alpha, Value b
// If we are here it means we are not available
assert(masterThread.state == Thread::SEARCHING);
- int booked = 0;
+ int workersCnt = 1; // At least the master is included
// Try to allocate available threads setting state to Thread::BOOKED, this
// must be done under lock protection to avoid concurrent allocation of
// the same slave by another master.
lock_grab(&threadsLock);
- for (i = 0; !Fake && i < activeThreads && booked < maxThreadsPerSplitPoint; i++)
+ for (i = 0; !Fake && i < activeThreads && workersCnt < maxThreadsPerSplitPoint; i++)
if (i != master && threads[i].is_available_to(master))
{
threads[i].state = Thread::BOOKED;
threads[i].splitPoint = &splitPoint;
splitPoint.is_slave[i] = true;
- booked++;
+ workersCnt++;
}
lock_release(&threadsLock);
// We failed to allocate even one slave, return
- if (!Fake && !booked)
+ if (!Fake && workersCnt == 1)
return bestValue;
masterThread.activeSplitPoints++;
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