Dave, I don't oppose this new method -- it shouldn't be necessary to add fencing just to use pb_cache --, but this method adds a new way of doing the same thing.
Does the underlying buffer support PIPE_BUFFER_USAGE_DONT_BLOCK? If so what about doing: boolean pb_cache_is_buffer_compat() { void map; map = pb_map(buf->buffer, PIPE_BUFFER_USAGE_DONT_BLOCK | PIPE_BUFFER); if (map) { /* TODO: cache the map value for the first map */ pb_unmap(buf->buffer); return TRUE; } return FALSE; } Jose ________________________________________ From: Dave Airlie [airl...@gmail.com] Sent: Sunday, March 07, 2010 20:36 To: Luca Barbieri Cc: mesa Subject: Re: [Mesa3d-dev] gallium cached bufmgr busy change On Sun, Mar 7, 2010 at 9:44 PM, Luca Barbieri <luca.barbi...@gmail.com> wrote: > I think you are supposed to do this using the fenced bufmgr over > cached along with a (ideally userspace) fencing mechanism. > If you can implement pb_busy, you should be able to implement > fence_signalled in exactly the same way (making the fence handle a > pointer to buffers should work for this purpose, if standalone fences > are hard to do). > The fenced bufmgr will only pass destruction requests to the wrapped > bufmgr once the fences are signalled. > It just seemed a bit heavyweight, I don't want userspace fences, so why do I have to jump though abstraction hoops? The fencing solution isn't near as efficent from what I can see, as it is designed around fences not buffer busy, I'll see if I can give it a try, but I suspect it look and smell like a hack. Dave. ------------------------------------------------------------------------------ Download Intel® Parallel Studio Eval Try the new software tools for yourself. Speed compiling, find bugs proactively, and fine-tune applications for parallel performance. See why Intel Parallel Studio got high marks during beta. http://p.sf.net/sfu/intel-sw-dev _______________________________________________ Mesa3d-dev mailing list Mesa3d-dev@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mesa3d-dev ------------------------------------------------------------------------------ Download Intel® Parallel Studio Eval Try the new software tools for yourself. Speed compiling, find bugs proactively, and fine-tune applications for parallel performance. See why Intel Parallel Studio got high marks during beta. http://p.sf.net/sfu/intel-sw-dev _______________________________________________ Mesa3d-dev mailing list Mesa3d-dev@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mesa3d-dev