Quote Originally Posted by bridgman View Post
Don't know but I'll ask around.



We pushed code for "multiple ring support" a couple of months ago :

http://www.phoronix.com/scan.php?pag...tem&px=MTAwNzg

A number of things will use that code in the future, but one of them is allowing compute operations to go through a separate command queue from graphics operations so that the hardware can flip between tasks at a fairly fine-grained level. The multiple ring support started with Cayman but GCN is the first generation where I expect we will really use it.
My understanding of SI is thin but I thought or maybe I was hoping that compute threads could run independent of the graphical workload on one or more of the "cores". Much like a process might run on a separate i86 core.


Correct, I can't answer
Thought so! By the way does SI generate 32 or 64 bit addresses?




We are trying to get all the invasive changes (multiple rings, memory management etc..) pushed out in time for the merge window. Hopefully the remaining changes for GCN will be specific to new HW, but I don't think we have discussed getting them in post-merge yet.

BTW from this point on I'm probably going to switch from talking about GCN to talking about SI (the first generation of GCN parts), partly because it's one less letter (I'm big into efficiency) and partly because that's the terminology we use internally and I'm getting tired of typing SI, backpacing over it and typing GCN instead.
I know there is a lot of whining here about slow Linux support but waiting for a more polished support package isn't a bad idea. Better to merge in after 3.3 than to have buggy support.

By the way give everybody on the GCN team a slap on the back for me. This looks like a major accomplishment and the first product looks to be very impressive as a generation one implementation.