Matteo Bruni : wined3d: Call YieldProcessor() when spinning waiting for CS commands.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: ecdeab593bdb42c6c8854cdef9c59daba9ba6ce1
URL:    https://gitlab.winehq.org/wine/wine/-/commit/ecdeab593bdb42c6c8854cdef9c59da...

Author: Matteo Bruni <mbruni(a)codeweavers.com>
Date:   Sun May  6 03:14:21 2018 +0200

wined3d: Call YieldProcessor() when spinning waiting for CS commands.

Yielding to other threads might help to get new packets and (very
slightly) reduce contention on the queue head and tail pointers.

---

 dlls/wined3d/cs.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/dlls/wined3d/cs.c b/dlls/wined3d/cs.c
index 14f2ca9bb4a..2cd53cd7a5b 100644
--- a/dlls/wined3d/cs.c
+++ b/dlls/wined3d/cs.c
@@ -3421,6 +3421,7 @@ static DWORD WINAPI wined3d_cs_run(void *ctx)
             queue = &cs->queue[WINED3D_CS_QUEUE_DEFAULT];
             if (wined3d_cs_queue_is_empty(cs, queue))
             {
+                YieldProcessor();
                 if (++spin_count >= WINED3D_CS_SPIN_COUNT && list_empty(&cs->query_poll_list))
                     wined3d_cs_wait_event(cs);
                 continue;