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

[Thomas Hellstrom <thellstrom@vmware.com>]

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