1 files changed, 7 insertions, 2 deletions
diff --git a/lib/system/threads.nim b/lib/system/threads.nim
index a7a811844..96c045e6b 100644
--- a/lib/system/threads.nim
+++ b/lib/system/threads.nim
@@ -127,7 +127,8 @@ elif defined(genode):
   proc initThread(s: var SysThread,
                   stackSize: culonglong,
                   entry: GenodeThreadProc,
-                  arg: pointer) {.
+                  arg: pointer,
+                  affinity: cuint) {.
     importcpp: "#.initThread(genodeEnv, @)".}
 
   proc threadVarAlloc(): ThreadVarSlot = 0
@@ -567,6 +568,9 @@ when hostOS == "windows":
     setThreadAffinityMask(t.sys, uint(1 shl cpu))
 
 elif defined(genode):
+  var affinityOffset: cuint = 1
+  # CPU affinity offset for next thread, safe to roll-over
+
   proc createThread*[TArg](t: var Thread[TArg],
                            tp: proc (arg: TArg) {.thread, nimcall.},
                            param: TArg) =
@@ -577,7 +581,8 @@ elif defined(genode):
     when hasSharedHeap: t.stackSize = ThreadStackSize
     t.sys.initThread(
       ThreadStackSize.culonglong,
-      threadProcWrapper[TArg], addr(t))
+      threadProcWrapper[TArg], addr(t), affinityOffset)
+    inc affinityOffset
 
   proc pinToCpu*[Arg](t: var Thread[Arg]; cpu: Natural) =
     {.hint: "cannot change Genode thread CPU affinity after initialization".}