gentoo-overlay/media-video/mpv/files/0.18.1/mpv-0.18.1-fix-high-CPU-on-wayland.patch

commit e11a20a8122b370b66235284dd4f67ce1f1bbc0b
Author: Rostislav Pehlivanov <atomnuker@gmail.com>
Date:   Tue Jul 19 03:00:03 2016 +0100

vo_wayland: fix high CPU usage due to busy polling

There's no need to call wl_display_flush() since all the client-side
buffered data has already been flushed prior to polling the fd.
Instead only check for POLLIN and the usual ERR+HUP.

diff --git a/video/out/wayland_common.c b/video/out/wayland_common.c
index 0e44ddd..6861c93 100644
--- a/video/out/wayland_common.c
+++ b/video/out/wayland_common.c
@@ -1106,7 +1106,7 @@ static int vo_wayland_poll (struct vo *vo, int timeout_msecs)

     struct pollfd fd = {
         wl->display.display_fd,
-        POLLIN | POLLOUT | POLLERR | POLLHUP,
+        POLLIN | POLLERR | POLLHUP,
         0
     };

@@ -1125,8 +1125,8 @@ static int vo_wayland_poll (struct vo *vo, int timeout_msecs)
         }
         if (fd.revents & POLLIN)
             wl_display_dispatch(dp);
-        if (fd.revents & POLLOUT)
-            wl_display_flush(dp);
+        else
+            wl_display_dispatch_pending(dp);
     }

     return polled;