Re: [Mesa-dev] [RFC] dynamic IB size tuning for radeonsi

2016-04-17 Thread Grigori Goronzy
Interesting, and thanks for poking at this issue. I've been thinking about tuning IB sizes as well. I'd like for us to get this right, so I wonder: What's your theory for _why_ your change helps? See below. I think you discovered it yourself. I'll be honest with you: Right now, I think your a

Re: [Mesa-dev] [RFC] dynamic IB size tuning for radeonsi

2016-04-17 Thread Nicolai Hähnle
On 15.04.2016 12:50, Grigori Goronzy wrote: apps that cause a lot of synchronization benefit from small IB sizes. The current IB size is a bit on the large side for this class of apps. On the other hand, if there isn't much synchronization going on, increasing the IB size can slightly improve per

[Mesa-dev] [RFC] dynamic IB size tuning for radeonsi

2016-04-15 Thread Grigori Goronzy
Hi, apps that cause a lot of synchronization benefit from small IB sizes. The current IB size is a bit on the large side for this class of apps. On the other hand, if there isn't much synchronization going on, increasing the IB size can slightly improve performance, too. Here's a quick hack that