On Mon, Aug 10, 2015 at 10:40:29AM +0200, Daniel Vetter wrote: > On Fri, Aug 07, 2015 at 09:14:01PM +0100, Chris Wilson wrote: > > Reuse the common upload bo for the temporary blitter storage to try and > > minimise resource usage. > > > > Caveats: this may impose a read-read relationship on the buffer between > > the blitter and render engines, and may add stalls on old kernels. > > Note that read-read has only landed in 4.2, hence we might want to hold > off on this one a bit until most distros have upgraded to this ;-)
It's not that big of a penalty. Mesa has already closed and submitted the render batch due to the change of engines and will be forced to do a sync anyway because it is writing into a busy object (busy presumably due to a render operation). You've already lost. -Chris -- Chris Wilson, Intel Open Source Technology Centre _______________________________________________ mesa-dev mailing list mesa-dev@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/mesa-dev
