x11: Fix Vulkan slowness

Change our swapchain configuration from VK_PRESENT_MODE_FIFO_KHR to VK_PRESENT_MODE_IMMEDIATE_KHR. This makes second-long hangs in vkAcquireNextImageKHR() go away, which doesn't make any sense to me.
x11: Fix glx slowness
2020-09-10 21:17:35 -04:00 · 2020-09-10 21:17:13 -04:00
2 changed files with 2 additions and 1 deletions
--- a/gdk/gdkvulkancontext.c
+++ b/gdk/gdkvulkancontext.c
@@ -354,7 +354,7 @@ gdk_vulkan_context_check_swapchain (GdkVulkanContext  *context,
                                                },
                                                .preTransform = capabilities.currentTransform,
                                                .compositeAlpha = composite_alpha,
-                                                .presentMode = VK_PRESENT_MODE_FIFO_KHR,
+                                                .presentMode = VK_PRESENT_MODE_IMMEDIATE_KHR,
                                                .clipped = VK_FALSE,
                                                .oldSwapchain = priv->swapchain
                                            },
--- a/gdk/x11/gdkglcontext-x11.c
+++ b/gdk/x11/gdkglcontext-x11.c
@@ -1483,6 +1483,7 @@ gdk_x11_display_make_gl_context_current (GdkDisplay   *display,
            g_message ("Making GLX context %p current to drawable %lu",
                       context, (unsigned long) drawable));

+  glFinish ();
  if (!glXMakeContextCurrent (dpy, drawable, drawable,
                              context_x11->glx_context))
    {