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Make process_all_updates draw synchronously

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By calling XSync in _gdk_x11_display_after_process_all_updates we
effectively make gdk rendering sync, which avoids problems with the
client animations running faster than the Xserver rendering, thus
filling up the X rendering pipes and essentially "locking up" the
Xserver (i.e. you can't even close the offending window because the
WM is starved too).

I verified this worked by making GtkSpinner paint multiple times on my
intel driver (which has some issue making this rendering slow atm),
and without this patch i get severe lag where even window dragging
stops for 5 seconds when i drag the mouse around. However, with the
patch everything is smooth.

https://bugzilla.gnome.org/show_bug.cgi?id=684639
This commit is contained in:
Alexander Larsson 2012-10-01 10:02:01 +02:00
parent d6809d050a
commit 83c66c9c2c
1 changed files with 5 additions and 0 deletions
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5
gdk/x11/gdkwindow-x11.c
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@ -4858,6 +4858,11 @@ _gdk_x11_display_before_process_all_updates (GdkDisplay *display)
void
_gdk_x11_display_after_process_all_updates (GdkDisplay *display)
{
/* Sync after all drawing, otherwise the client can get "ahead" of
the server rendering during animations, such that we fill up
the Xserver pipes with sync rendering ops not letting other
clients (including the VM) do anything. */
XSync (GDK_DISPLAY_XDISPLAY (display), FALSE);
}
static Bool