On Sat, 21 Apr 2012 09:12:17 -0700, Ben Widawsky <ben at bwidawsk.net> wrote: > On Sat, 21 Apr 2012 10:41:55 +0100 > Chris Wilson <chris at chris-wilson.co.uk> wrote: > > I think this whole interface is a stop-gap solution for pollable sync > > objects without a clear use case. Do we have a spec for a feature > > wishing to build upon this interface? > > Good point. This is primarily for glClientWaitSync. I will update the > commit message with this information. I read through the ARB_sync spec and this interface does seem to be a good match for that. A slight sour test from that spec being open-ended which might mean that we need to revise the interface in future. However, I did realise one blindingly obvious use-case: drm_intel_gem_bo_wait_wait_rendering(); Currently this is used by Mesa to do its client throttling, and in consequence also blocks X. i915_wait_ioctl() will allow mesa to only block itself and so help reduce interface stutters, even more important with multiple GL clients. -Chris -- Chris Wilson, Intel Open Source Technology Centre
