Am 23.06.2017 um 09:09 schrieb zhoucm1:
On 2017年06月23日 14:57, Christian König wrote:
But giving the CS IOCTL an option for directly specifying the BOs
instead of a BO list like Marek suggested would indeed save us some
time here.
interesting, I always follow how to improve our cs ioctl, since UMD
guys aften complain our command submission is slower than windows.
Then how to directly specifying the BOs instead of a BO list? BO
handle array from UMD? Could your guys describe more clear? Is it doable?
Making the BO list part of the CS IOCTL wouldn't help at all for the
close source UMDs. To be precise we actually came up with the BO list
approach because of their requirement.
The biggest bunch of work during CS is reserving all the buffers,
validating them and checking their VM status. It doesn't matter if the
BOs come from the BO list or directly in the CS IOCTL.
The key point is that CS overhead is pretty much irrelevant for the open
source stack, since Mesa does command submission from a separate thread
anyway.
Regards,
Christian.
Regards,
David Zhou
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