Merge branch 'reduce_syscalls_node_based_timechecks_or_something'

Luecx · Luecx · commit b65dd64e044e · 2023-01-29T10:45:32.000+01:00
bench: 4271540

```
ELO   | 12.40 +- 5.10 (95%)
SPRT  | 60.0+0.60s Threads=1 Hash=8MB
LLR   | 2.96 (-2.94, 2.94) [0.00, 2.50]
GAMES | N: 7992 W: 1940 L: 1655 D: 4397

ELO   | 17.25 +- 6.48 (95%)
SPRT  | 8.0+0.08s Threads=1 Hash=16MB
LLR   | 2.95 (-2.94, 2.94) [-2.50, 0.00]
GAMES | N: 5120 W: 1317 L: 1063 D: 2740
```
diff --git a/src_files/search.cpp b/src_files/search.cpp
@@ -438,9 +438,12 @@ Score Search::pvSearch(Board* b, Score alpha, Score beta, Depth depth, Depth ply
     }
     
     // if the time is over, we fail hard to stop the search. We don't want to call the system clock
-    // too often for speed reasons, so we only apply this when the depth is larger than 6.
-    if ((depth > 6 && !timeManager->isTimeLeft(&td->searchData))) {
+    // too often for speed reasons, so we only apply this when the node count is a multiple of 1024
+    if (   td->nodes % 1024 == 0
+        && td->threadID     == 0
+        && !timeManager->isTimeLeft(&td->searchData)) {
         td->dropOut = true;
+        this->timeManager->stopSearch();
         return beta;
     }
     

Original file line number	Diff line number	Diff line change
`@@ -438,9 +438,12 @@ Score Search::pvSearch(Board* b, Score alpha, Score beta, Depth depth, Depth ply`
`438`	`438`	`}`
`439`	`439`
`440`	`440`	`// if the time is over, we fail hard to stop the search. We don't want to call the system clock`
`441`		`- // too often for speed reasons, so we only apply this when the depth is larger than 6.`
`442`		`- if ((depth > 6 && !timeManager->isTimeLeft(&td->searchData))) {`
	`441`	`+ // too often for speed reasons, so we only apply this when the node count is a multiple of 1024`
	`442`	`+ if ( td->nodes % 1024 == 0`
	`443`	`+ && td->threadID == 0`
	`444`	`+ && !timeManager->isTimeLeft(&td->searchData)) {`
`443`	`445`	`td->dropOut = true;`
	`446`	`+ this->timeManager->stopSearch();`
`444`	`447`	`return beta;`
`445`	`448`	`}`
`446`	`449`