Limit tasks to N-1.

Undo task parallelism to N, back to N-1. As it appears there's a bug that only shows up on some limited toolsets.
bfgroup · Aug 28, 2023 · 9fb6e6f · 9fb6e6f
1 parent d6ad469
commit 9fb6e6f
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/src/engine/tasks.cpp b/src/engine/tasks.cpp
@@ -319,7 +319,7 @@ unsigned get_parallelism(int parallelism)
 	#if B2_USE_STD_THREADS
 	return parallelism >= 0
 		? parallelism
-		: std::min(unsigned(globs.jobs), system_info().cpu_thread_count());
+		: std::min(unsigned(globs.jobs), system_info().cpu_thread_count()) - 1;
 	#else
 	return 0;
 	#endif