Quoting Daniele Ceraolo Spurio (2019-09-12 19:45:27) > > > On 9/12/19 6:23 AM, Chris Wilson wrote: > > We see failures where the context continues executing past a > > preemption event, eventually leading to situations where a request has > > executed before we have event submitted it to HW! It seems like tgl is > > AFAIK on TGL the CS can detect tail updates in the image of a running > context even if the lrc hasn't been resubmitted via the elsp. Could that > be related to the early execution of requests? I haven't looked at the > failure logs, so forgive me if I'm completely off-mark :) We only update the CTX_RING_TAIL just prior to [re]submitting the context. But fun and games ensue around preemption where we often have to rewind the RING_TAIL. Still we should never push it behind RING_HEAD (so long as our semaphore is solid), so it should never be able to go past any of the previous RING_TAIL updates we made. At the moment, I'm just focusing on trimming back the features until we have a solid platform and then we will be better place to be able to look at what is going wrong. -Chris _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/intel-gfx
