#asahi-gpu on 2023-04-12 — irc logs at oftc.irclog.whitequark.org

2022-12-21 00:46 ChanServ changed the topic of #asahi-gpu to: Asahi Linux GPU development (no user support, NO binary reversing) | Keep things on topic | GitHub: https://alx.sh/g | Wiki: https://alx.sh/w | Logs: https://alx.sh/l/asahi-gpu

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05:20 <lina> Ooooh, that's good to know! Either we're leaking those objects or we're leaking the address space.

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08:56 <jannau> lina: found the issue, we don't add dev->shader_base to bo->ptr.gpu in agx_bo_free()

08:56 <jannau> I'll prepare a MR

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08:57 <jannau> so we are neither exhausting the address space nor leaking anything

08:58 <jannau> but returning bad addresses to the heap

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09:10 <jannau> chadmed: can you run `ioreg -l -p IODeviceTree | grep perf-states` on the m2 pro and get lina the output

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09:15 <lina> jannau: Ahhh! That explains it! (re agx_bo_free())

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09:48 <chadmed_> lina: https://gist.github.com/chadmed/4dd029b19c98fc610b56a469a69aa815

09:48 <chadmed_> had to install a new switch after work sorry for the delay!

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11:24 <jannau> fixed by https://gitlab.freedesktop.org/asahi/mesa/-/merge_requests/45 - free low VA space is now reused instead of exhausting the VA space

11:24 <jannau> a little surprising that random VAs can be "returned" to the heap

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22:33 <alyssa> jannau: in our (well, Lina's) UAPI, userspace manages its own VAs

22:33 <alyssa> kernel just gets told where to map things, up to userspace to allocate VAs

22:33 <alyssa> and it uses a heap of free VAs to allocate from, and returns VAs back to the heap when the correpsonding memory is unmapped

23:18 <jannau> alyssa: I was expecting an assert in util_vma_heap_free if the address is outside of the range given in util_vma_heap_init()

23:24 <jannau> I guess with this design you can start with an empty heap and free available VA spaces, i.e. add multiple disjunct heaps

23:26 <alyssa> oh, hm

23:26 <alyssa> maybe you should add an assert upstream? ;)

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