From 3828850dd623a515219118800b6e70b737788670 Mon Sep 17 00:00:00 2001
From: Albin Chaboissier <chalbin73@gmail.com>
Date: Fri, 7 Nov 2025 12:11:29 +0100
Subject: [PATCH] Use nproc for parallel testing

---
 Makefile | 2 +-
 build.sc | 3 ++-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/Makefile b/Makefile
index 6569419..80fe676 100644
--- a/Makefile
+++ b/Makefile
@@ -99,7 +99,7 @@ mill:
 autotest: mill test-bench/mem/tests/$(PROG).mem ##! Lance la simulation automatique pour tous les tests ou juste celui fourni dans PROG
 
 testall: mill compile
-	@PROOT=$(PWD) ./mill TPchisel.test.testOnly $(TOP_REP).ZzTopAllSpec
+	@PROOT=$(PWD) NPROC=$(shell nproc) ./mill TPchisel.test.testOnly $(TOP_REP).ZzTopAllSpec
 
 simulation: compile ##! Lance gtkwave sur le test fourni dans PROG
 	@$(call check_vars,PROG)
diff --git a/build.sc b/build.sc
index 38b5000..3093bbb 100644
--- a/build.sc
+++ b/build.sc
@@ -38,10 +38,11 @@ object `TPchisel` extends SbtModule { m =>
             ivy"org.scalatest::scalatest::3.2.19"
         )
 
+        val nproc = sys.env.get("NPROC").getOrElse("1");
         override def forkArgs = super.forkArgs() ++ Seq(
             "-Dscalatest.parallel.enabled=true",
             "-Dscalatest.parallel.mode=concurrent",
-            "-Dscalatest.parallel.config.fixed.pool.size=12"
+            s"-Dscalatest.parallel.config.fixed.pool.size=$nproc"
         )
     }
 }