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Remove "Max Threads per Split Point" UCI option

Browse source 
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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1
polyglot.ini
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@ -30,7 +30,6 @@ Space = 100
Aggressiveness = 100
Cowardice = 100
Min Split Depth = 0
Max Threads per Split Point = 5
Threads = 1
Idle Threads Sleep = true
Hash = 128

13
src/thread.cpp
View file

@ -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()

1
src/thread.h
View file

@ -166,7 +166,6 @@ struct ThreadPool : public std::vector<Thread*> {
bool sleepWhileIdle;
Depth minimumSplitDepth;
size_t maxThreadsPerSplitPoint;
Mutex mutex;
ConditionVariable sleepCondition;
TimerThread* timer;

1
src/ucioption.cpp
View file

@ -70,7 +70,6 @@ void init(OptionsMap& o) {
o["Aggressiveness"] = Option(100, 0, 200, on_eval);
o["Cowardice"] = Option(100, 0, 200, on_eval);
o["Min Split Depth"] = Option(0, 0, 12, on_threads);
o["Max Threads per Split Point"] = Option(5, 4, 8, on_threads);
o["Threads"] = Option(1, 1, MAX_THREADS, on_threads);
o["Idle Threads Sleep"] = Option(true);
o["Hash"] = Option(32, 1, 16384, on_hash_size);