On 05/23/2012 07:45 AM, Paul Berry wrote:
On 22 May 2012 13:02, Eric Anholt <e...@anholt.net <mailto:e...@anholt.net>> wrote:On Fri, 11 May 2012 11:03:50 -0700, Paul Berry <stereotype...@gmail.com <mailto:stereotype...@gmail.com>> wrote: > When executing a blorp operation on Gen7 that does not need a WM > program (i.e. a HiZ operation), we use 32-pixel dispatch mode because > it's faster. However, when executing a blorp operation that does need > a WM program, we need to use 16-pixel dispatch, because blorp WM > programs are compiled assuming 16-pixel dispatch. I didn't think dispatch mode means anything unless you're actually dispatching a thread (though I could see how having no dispatch mode set might anger things). Basically, I'm thinking just always set 16, unless there is some efficiency reason I don't know of. I don't honestly know. Chad, I inherited the 32-pixel dispatch from your HiZ code, and assumed you did it on purpose because it was faster. But I didn't actually do any tests. Do you have any thoughts about this?
I recall Chad saying that not setting thread dispatch broke horribly, so since he had enable thread dispatch, he picked the widest mode.
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