Am 04.08.2016 um 08:05 schrieb zhoucm1: > > > On 2016å¹´08æ??03æ?¥ 21:39, Christian König wrote: >> Doubling all the page table updates clearly doesn't sound like a good >> idea to me. > Could you tell me why it isn't a good idea? > I though the overhead is the least, and we don't need to sync between > bo and its shadow, aren't we? Yeah, but you also double the CPU overhead generating the update commands. And for large updates you need to backup the whole page table BO anyway, so the copy overhead between system memory and VRAM shouldn't matter so much. I would rather go into the direction that we switch shadow and real BO like we discussed previously. This way you would made all updates on the shadow first and then copy all changes page tables to their VRAM location after scheduling all the updates. Regards, Christian. > > Regards, > David Zhou
