#dri-devel on 2022-12-04 — irc logs at oftc.irclog.whitequark.org

2022-08-14 19:45 ChanServ changed the topic of #dri-devel to: <ajax> nothing involved with X should ever be unable to find a bar

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01:15 <jenatali> Mr label maker is wonderful. Just needed to reiterate

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02:58 <Jeremy_Rand_Talos> So the issues with traces having 0 frames that I mentioned yesterday seem to be Wayland-specific. When recording a trace with X11 the problem vanishes.

02:59 <Jeremy_Rand_Talos> No idea if there's a known issue there.

03:01 <Jeremy_Rand_Talos> However, new question. When I run gnome-maps in perf (using LLVMpipe), I see various lp_linear stuff show up, suggesting that the linear rasterizer is being used. When I record gnome-maps with apitrace, and then replay the trace under perf, perf does not show those lp_linear functions being called.

03:02 <Jeremy_Rand_Talos> Is that expected behavior? My goal is to benchmark the lp_linear stuff in LLVMpipe, not sure if apitrace is the right way to do it or if there's some better approach

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03:47 <airlied> Jeremy_Rand_Talos: my guess is the retrace might end up setting up a depth buffer always

03:49 <Jeremy_Rand_Talos> airlied, ouch, that does make sense, but is rather unfortunate if true

03:50 <Jeremy_Rand_Talos> airlied, seems like the most widely beneficial way to resolve it would be to make the linear rasterizer support depth buffers? Any idea how hard that would be?

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04:00 <airlied> Jeremy_Rand_Talos: very

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04:01 <airlied> depthbuffers are kinda intrinsicinly floating point

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04:02 <Jeremy_Rand_Talos> airlied, ok then. Is there an easy thing I can grep for in apitrace's source that would tell me if it's doing depth buffers?

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07:30 <Siddh[m]> <danvet> "so e.g. for internships like now..." <- danvet: Yeah I meant in a month or two. Thanks for the response

07:31 <Siddh[m]> <mairacanal> "interested in KUnit and amdgpu..." <- Thanks! I will definitely take a look at them.

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10:58 <repetitivestrain> hi, i'm not sure if this is the right place to ask this question, but here goes nothing

10:58 <repetitivestrain> what exactly is the union gbm_handle returned by gbm_bo_get_handle_for_plane?

10:59 <repetitivestrain> is it always a GEM handle?

10:59 <repetitivestrain> the gbm device was created for a modesetting device, of course

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11:44 <MrCooper> repetitivestrain: yes, a GEM handle (valid for the DRM fd passed to gbm_create_device)

11:44 <repetitivestrain> MrCooper: great, thanks. what about on nvidia?

11:45 <MrCooper> must be the same

11:46 <MrCooper> or generic user space using GBM couldn't work with nvidia

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11:49 <repetitivestrain> right, thank you for explaining

11:49 <repetitivestrain> though i remember reading somewhere that nvidia does not use GEM in their kernel driver

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14:49 <MrCooper> repetitivestrain: maybe not in their core driver, but again they do have to use them in their KMS frontend for compatibility with generic user space

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16:46 <robclark> danvet: maybe drm-misc can take https://patchwork.freedesktop.org/series/111449/ ? (Less paperwork for me to land them in CrOS FROMGIT instead of FROMLIST ;-))

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16:58 <danvet> robclark, you need more chromium.org committers for drm-misc

16:58 <danvet> :-P

16:58 <danvet> robclark, douglas not around to do the deed?

16:59 <robclark> oh, I guess dianders or seanpaul_ could.. I just figured it was something you were more familiar with.. but I can bug doug about it tomorrow ;-)

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17:49 <javierm> robclark: I'm happy to do it if you want

17:49 <robclark> sure, thx

17:50 <javierm> robclark: yw. Do you want in drm-misc-fixes or drm-misc-next is enough for you?

17:50 <javierm> robclark: ah, are for stable as well. Let's do it in -fixes then

17:50 <robclark> IMHO it is a good thing for fixes

17:50 <robclark> thx

18:01 <javierm> robclark: done. I just wanted to do a build test just in case before pushing

18:01 <robclark> thx.. I guess we need to finish getting gitlab-ci into a shape where we can use it on drm-misc ;-)

18:03 <javierm> robclark: yeah :)

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