From: Eric Anholt Date: Sat, 25 Dec 2010 16:57:22 +0000 (-0800) Subject: intel: Only do frame throttling at glFlush time when using frontbuffer. X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=b01b73c482474609aceb6bb13b083e96c06ba353;p=mesa.git intel: Only do frame throttling at glFlush time when using frontbuffer. This is the hack for input interactivity of frontbuffer rendering (like we do for backbuffer at intelDRI2Flush()) by waiting for the n-2 frame to complete before starting a new one. However, for an application doing multiple contexts or regular rebinding of a single context, this would end up lockstepping the CPU to the GPU because every unbind was considered the end of a frame. Improves WOW performance on my Ironlake by 48.8% (+/- 2.3%, n=5) --- diff --git a/src/mesa/drivers/dri/intel/intel_context.c b/src/mesa/drivers/dri/intel/intel_context.c index 9c222c7b485..d183d275e73 100644 --- a/src/mesa/drivers/dri/intel/intel_context.c +++ b/src/mesa/drivers/dri/intel/intel_context.c @@ -565,7 +565,8 @@ intel_glFlush(struct gl_context *ctx) intel_flush(ctx); intel_flush_front(ctx); - intel->need_throttle = GL_TRUE; + if (intel->is_front_buffer_rendering) + intel->need_throttle = GL_TRUE; } void