add dynamic hashtable sizing

PGG106 · Jun 10, 2022 · 217bb0b · 217bb0b
1 parent 9291ccc
commit 217bb0b
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Showing 5 changed files with 14 additions and 7 deletions.
diff --git a/src/bench.cpp b/src/bench.cpp
@@ -65,7 +65,7 @@ int start_bench() {
 	int total_nodes = 0;
 	int total_time = 0;
 	info->quit = 0;
-	InitHashTable(HashTable);
+	InitHashTable(HashTable,64);
 	setvbuf(stdin, NULL, _IONBF, 0);
 	setvbuf(stdout, NULL, _IONBF, 0);
 

diff --git a/src/main.cpp b/src/main.cpp
@@ -23,7 +23,7 @@ int main(int argc, char** argv)
 	S_Board pos[1];
 	S_SearchINFO info[1];
 	Reset_info(info);
-	InitHashTable(HashTable);
+	InitHashTable(HashTable,64);
 	setvbuf(stdin, NULL, _IONBF, 0);
 	setvbuf(stdout, NULL, _IONBF, 0);
 

diff --git a/src/ttable.cpp b/src/ttable.cpp
@@ -9,7 +9,6 @@
 #include "assert.h"
 #include "makemove.h"
 
-const int HashSize = 0x100000 * 80;
 
 S_HASHTABLE HashTable[1];
 
@@ -58,8 +57,8 @@ void ClearHashTable(S_HASHTABLE* table) {
 	table->newWrite = 0;
 }
 
-void InitHashTable(S_HASHTABLE* table) {
-
+void InitHashTable(S_HASHTABLE* table, int MB) {
+	int HashSize = 0x100000 * MB;
 	table->numEntries = HashSize / sizeof(S_HASHENTRY);
 	table->numEntries -= 2;
 	if (table->pTable != NULL) free(table->pTable);

diff --git a/src/ttable.h b/src/ttable.h
@@ -7,7 +7,7 @@ int GetPvLine(const int depth, S_Board* pos);
 
 
 void ClearHashTable(S_HASHTABLE* table);
-void InitHashTable(S_HASHTABLE* table);
+void InitHashTable(S_HASHTABLE* table, int MB);
 
 int ProbeHashEntry(S_Board* pos, int* move, int* score, int alpha, int beta, int depth);
 void StoreHashEntry(S_Board* pos, const int move, int score, const int flags, const int depth);

diff --git a/src/uci.cpp b/src/uci.cpp
@@ -265,7 +265,7 @@ void Uci_Loop(S_Board* pos, S_SearchINFO* info, char** argv)
 
 	}
 
-
+	int MB = 64;
 
 	// reset STDIN & STDOUT buffers
 	setvbuf(stdin, NULL, _IONBF, 0);
@@ -277,6 +277,7 @@ void Uci_Loop(S_Board* pos, S_SearchINFO* info, char** argv)
 	// print engine info
 	printf("id name CE2BIT\n");
 	printf("id author PGG\n");
+	printf("option name Hash type spin default 64 \n");
 	printf("uciok\n");
 
 	// main loop
@@ -340,6 +341,13 @@ void Uci_Loop(S_Board* pos, S_SearchINFO* info, char** argv)
 			printf("id author PGG106\n");
 			printf("uciok\n");
 		}
+
+
+		else if (!strncmp(input, "setoption name Hash value ", 26)) {
+			sscanf(input, "%*s %*s %*s %*s %d", &MB);
+			printf("Set Hash to %d MB\n", MB);
+			InitHashTable(HashTable, MB);
+		}
 		else if (strncmp(input, "bench", 5) == 0) {