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Remove "Max Threads per Split Point" UCI option

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Experimental patch to verify if drop of nps
in endgames at very long TC is due to this.

Suggested by Ronald de Man.

bench: 7451319
This commit is contained in:
Marco Costalba
2014-03-15 21:13:43 +01:00
parent 6e4b4c42ed
commit a1a7bc84da
4 changed files with 6 additions and 10 deletions
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13
src/thread.cpp
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@@ -88,7 +88,7 @@ Thread::Thread() /* : splitPoints() */ { // Value-initialization bug in MSVC
maxPly = splitPointsSize = 0;
activeSplitPoint = NULL;
activePosition = NULL;
idx = Threads.size();
idx = Threads.size(); // Starts from 0
}
@@ -213,9 +213,8 @@ void ThreadPool::exit() {
void ThreadPool::read_uci_options() {
maxThreadsPerSplitPoint = Options["Max Threads per Split Point"];
minimumSplitDepth = Options["Min Split Depth"] * ONE_PLY;
size_t requested = Options["Threads"];
minimumSplitDepth = Options["Min Split Depth"] * ONE_PLY;
size_t requested = Options["Threads"];
assert(requested > 0);
@@ -297,12 +296,12 @@ void Thread::split(Position& pos, const Stack* ss, Value alpha, Value beta, Valu
activeSplitPoint = &sp;
activePosition = NULL;
size_t slavesCnt = 1; // This thread is always included
int slavesCnt = 1; // This thread is always included
Thread* slave;
while ( (slave = Threads.available_slave(this)) != NULL
&& ++slavesCnt <= Threads.maxThreadsPerSplitPoint && !Fake)
while (!Fake && (slave = Threads.available_slave(this)) != NULL)
{
++slavesCnt;
sp.slavesMask |= 1ULL << slave->idx;
slave->activeSplitPoint = &sp;
slave->searching = true; // Slave leaves idle_loop()