Re: [RFC 0/3] TTM priority queue logic

On 04/04/2014 03:52 PM, Lauri Kasanen wrote:

Hi list, Thomas,

I'd like to know if this is going in the right direction.

I've implemented a priority queue on top of the kernel rb tree and linked list. It's been tested well in userspace.

I hardcoded radeon to input the buffer size as the score. Nothing blew up, games ran fine, and even got ~2% more fps on average*.

The only thing missing from this code is the "if score is too low, and there is no room without eviction, tell driver so" logic.

• Lauri

• This is a fairly bad strategy, and according to my simulator achieves

16% worse results compared to LRU in heavier situations. The games tested here all fit in VRAM, which should explain the improvement

Lauri, I'm out of the office until monday, I'll take a look then. Thanks,

Thomas