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>>>>>    * Unwrap dma_fence_chain and dma_fence_array containers and deep >>>>> dive into all >>>>>    * potential fences in them. If @head is just a normal fence only >>>>> that one is >>>>>    * returned. >>>>> + * >>>>> + * Note that signalled fences are opportunistically filtered out, >>>>> which >>>>> + * means the iteration is potentially over no fence at all. >>>>>    */ >>>>>   #define dma_fence_unwrap_for_each(fence, cursor, head)            \ >>>>>       for (fence = dma_fence_unwrap_first(head, cursor); fence;    \ >>>>> -         fence = dma_fence_unwrap_next(cursor)) >>>>> +         fence = dma_fence_unwrap_next(cursor)) \ >>>>> +        if (!dma_fence_is_signaled(fence)) >>>>>     #endif >>>> >>>> It looks like this particular patch affects merging Sync Fences, >>>> which is reflected by failing IGT test (igt@sw_sync)[1]. The failing >>>> subtests are: >>>>   - sync_merge - merging different fences on the same timeline, neither >>>>          single nor merged fences are signaled >>>> >>>>   - sync_merge_same - merging the fence with itself on the same >>>>          timeline, the fence didn't signal at all >>>> >>>>   - sync_multi_timeline_wait - merging different fences on different >>>>          timelines; the subtest checks if counting fences of >>>>          various states works. Currently, it can only see 2 >>>>          active fences, 0 signaling (should be 2 active, >>>>          1 signaling) >>>> >>>> Reverting this commit on the top of drm-tip fixes the issue, but I'm >>>> not sure if it wouldn't impact other places in the code. Please let >>>> me know if I can be of any help. >>> >>> >>> Thanks for letting me know. Not sure what's going on here, but I can >>> take a look today if time permits. >> >> The reproduction with IGTs should be quite easy. You'll need to >> clone/download the IGT code and follow instructions for Building[1] >> the project (make sure you have meson and ninja installed): >> >> https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgitlab.freedesktop.org%2Fdrm%2Figt-gpu-tools&data=05%7C01%7Cchristian.koenig%40amd.com%7C9a9587aefd2d4ac2d86208da63375cb6%7C3dd8961fe4884e608e11a82d994e183d%7C0%7C0%7C637931386683611766%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=4WsMutcFJ2HwBqld%2BTv9N1Tx6cbFMwJJZ6kjm5rbfoI%3D&reserved=0 >> >> >> Once you have it up and running, go to /build/tests, and run >> the subtests: >> >>   ./sw_sync --run sync_merge >>   ./sw_sync --run sync_merge_same >>   ./sw_sync --run sync_multi_timeline_wait >> >> You can run all the subtests with ./sw_sync, but I think these are the >> most relevant to you. > > Thanks, I've already managed to reproduce it. > > Not sure what's going on here, but could be that the test case was never > correct in the first place. Need to double check. That's also a possibility, but I couldn't verify it before writing to you, as it's not my area of expertise. Thanks for taking a look at this. All the best, Karolina > Thanks, > Christian. > >> >> Many thanks, >> Karolina >> >> ------------------ >> [1] - >> https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgitlab.freedesktop.org%2Fdrm%2Figt-gpu-tools%23building&data=05%7C01%7Cchristian.koenig%40amd.com%7C9a9587aefd2d4ac2d86208da63375cb6%7C3dd8961fe4884e608e11a82d994e183d%7C0%7C0%7C637931386683611766%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=FV0Ao6ra8EOyr4cOs4N7mCmpOEUUObTrgyOrd0tvEV8%3D&reserved=0 >> >> >>> Do you have a description how to easy reproduce this? E.g. how to run >>> just those specific igts? >>> >>> Thanks, >>> Christian. >>> >>>> >>>> All the best, >>>> Karolina >>>> >