#panfrost on 2019-09-07 — irc logs at freenode.irclog.whitequark.org

2019-09-06 11:20 alyssa changed the topic of #panfrost to: Panfrost - FLOSS Mali Midgard & Bifrost - Logs https://freenode.irclog.whitequark.org/panfrost - <daniels> avoiding X is a huge feature

01:14 <anarsoul> alyssa: are you around?

01:14 <anarsoul> I have some questions about BO cache

01:15 <anarsoul> how do you make sure that BO is not used by GPU when you put it in cache?

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14:10 <marex-cloud> anarsoul: refcounting maybe? Increase refcount when it's somehow used (Bo from handle or new etc), decrease on flush and return to cache on refcount 0

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16:06 <anarsoul> marex-cloud: flush is asynchronous, i.e. we don't wait on job to complete

16:38 <Marex> ah hm

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17:20 <bbrezillon> anarsoul: we do it when dequeing from the cache

17:20 <anarsoul> I see

17:21 <bbrezillon> well, that's how it'll work after "panfrost: Make sure the BO is 'ready' when picked from the cache"

17:21 <anarsoul> bbrezillon: when do you put it in cache then?

17:21 <bbrezillon> right now, the BO is not released until the job is done

17:22 <bbrezillon> (in panfrost_free_job)

17:22 <anarsoul> which is called from flush?

17:24 <anarsoul> bbrezillon: how do you make sure that you have enough jobs in flight not to stall pipeline?

17:26 <bbrezillon> anarsoul: we don't :)

17:26 <bbrezillon> everything is serialized right now

17:27 <anarsoul> oh

17:27 <anarsoul> :(

17:27 <bbrezillon> that's what "panfrost: Rework the batch pipelining logic" was supposed to address

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17:53 <Marex> bbrezillon: fun, etnaviv will need that too eventually

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18:13 <anarsoul> Marex: are you working on etnaviv now?

18:13 <anarsoul> anyway, guess I'm gonna stall pipeline for now, it's better than spending most of time in allocating/freeing BOs

18:17 <Marex> anarsoul: a bit

18:17 <anarsoul> everyone's working on GPU drivers nowadays, eh? :)

18:19 <Marex> :)

18:21 <HdkR> Everyone is a GPU dev~

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18:40 <tomeu> it's where all the fun is :)

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22:12 <alyssa> z True

22:12 <HdkR> y False

22:12 <alyssa> x Maybe

22:13 <HdkR> plez no tristate

22:13 <endrift> w Please

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