Increase the maximum hash size by a factor of 256

[stockfish] / src / tt.cpp

diff --git a/src/tt.cpp b/src/tt.cpp
index 0a3c54a1e2318046abe8dbc4d9859dc1f0b78a6d..92aaee001824276e49f1090c72ec451070900dd0 100644 (file)
--- a/src/tt.cpp
+++ b/src/tt.cpp
@@ -65,8 +65,10 @@ void TranspositionTable::resize(size_t mbSize) {
 
   aligned_ttmem_free(mem);
 
-  clusterCount = mbSize * 1024 * 1024 / sizeof(Cluster);
-  table = static_cast<Cluster*>(aligned_ttmem_alloc(clusterCount * sizeof(Cluster), mem));
+  superClusterCount = mbSize * 1024 * 1024 / (sizeof(Cluster) * ClustersPerSuperCluster);
+
+  table = static_cast<Cluster*>(
+      aligned_ttmem_alloc(superClusterCount * ClustersPerSuperCluster * sizeof(Cluster), mem));
   if (!mem)
   {
       std::cerr << "Failed to allocate " << mbSize
@@ -89,6 +91,8 @@ void TranspositionTable::clear() {
   {
       threads.emplace_back([this, idx]() {
 
+          const size_t clusterCount = superClusterCount * ClustersPerSuperCluster;
+
           // Thread binding gives faster search on systems with a first-touch policy
           if (Options["Threads"] > 8)
               WinProcGroup::bindThisThread(idx);