Puff

http://www.inxpo.com/events/amd/afds-d/
期待 12 Jun，HSA APU 橫空出世。CPU & GPU cache coherency 呀。

Puff

引用:

原帖由 qcmadness 於 2012-6-8 22:00 發表
SB已經做到

I don't care about Intel.
And there is no cache coherency among CPU and GPU ensured in Sandy Bridge, though both share the same LLC. Only the CPU caches will ensure full coherency.

[ 本帖最後由 Puff 於 2012-6-8 22:42 編輯 ]

Puff

引用:

原帖由 qcmadness 於 2012-6-8 23:00 發表
http://www.realworldtech.com/pag ... 80811195102&p=9

No words there is about coherency.

It's just about how CPU and GPU shares LLC, and how GPU handles shared data. The way SNB handles such data is similar to Llano and Trinity: You want sharing with correctness? Do a flush please. Ivy Bridge even extends the GPU cache hierarchy to 4 levels. So the difference is the formation of cache hierarchy, but none of them get hardware coherency ensured.

And no further discussion on the necessity of hardware coherency among CPU and GPU please. I can foresee that we have a very different value on this topic.



[ 本帖最後由 Puff 於 2012-6-9 22:32 編輯 ]