Sloow blender on FreeBSD (vs Ubuntu)

[Mathias Picker]

Well, I forgot to include some info about the system:

dmesg https://pastebin.com/RGA3VLiB
xorg.log https://pastebin.com/8C49UGKk

anything else, just ask.

Mathias Picker <Mathias.Picker at virtual-earth.de> writes:

> Hi all,
>
> the last days I tried to get blender into working state on a 2nd 
> gen Thinkpad X1 Yoga.
>
> tl;dr
>
> blender is stuttering and jerky on my X1 running an I7-8550U / 
> UHD620 (4-core, 2/4Ghz) and FreeBSD, while it works like a charm 
> on my Surface Go Pentium Gold 4415Y/HD615 (2-core, 1.6Ghz) with 
> Ubuntu.
> This is both on 12-STABLE and -CURRENT. It’s a bit better on 
> -CURRENT, but still horrible.
>
> Is there any way to speed blender up on FreeBSD?
>
>
> Long version:
> I wanted to try out blenders Grease Pencil, up until now I only 
> used blender for video editing.
>
> GP or rotating 3D-Scenes in blender 2.90 on 12-STABLE was 
> abysmally slow and crashed repeatedly after a few strokes with 
> grease pencil or a few minutes work in the 3D-view with:
> Jan  4 23:04:17 Danton kernel: drmn0: GPU HANG: ecode 
> 9:1:0x87f99eb9, in blender [100824], hang on rcs0
> Jan  4 23:04:17 Danton kernel: drmn0: Resetting rcs0 for hang on 
> rcs0
>
> The GPU reset did not work, machine hangs, reboot via ssh.
>
> Recompiled blender, tried older version, all with the same 
> result, 
> although 2.8x seemed a bit faster, but still slow & crashes.
>
> Searched the web, found similar problems by others on Linux, 
> suggested KMS update.
>
> So I switched to -CURRENT with drm-current-kmod (5.4 instead of 
> 4.5)
>
> Same GPU hang, but here the reset works. Performance *slightly* 
> better, but every hang takes about 2 sec, no way to work with 
> this.
>
> Updating X1 bios - now the error did not happen for quite some 
> time. 
>
> But still, quite slow. Stuttering when rotating the default cube 
> in simple solid  or  wireframe mode. On a I7-8550U running full 
> speed (hwpstate_intel with epp=0), cpu freq between 2500 and 
> 3900).
>
> Installed mesa-devel：the GPU hang is back.
>
> Recompiled blender to 2.91.0_2, mesa-devel, drm everything. No 
> more GPU hang for now, but still stuttering motions, Grease 
> Pencil 
> strokes hang back 1-2 seconds from my stylus.
>
> Then I tried my 1st gen Surface Go 8Gb running Ubuntu: Blender 
> is 
> blazing fast for these simple tasks. Fluid rotation, allmost 
> real 
> time grease pencil：WTF?
>
> This is an i7-8550U quad core running 2/4Ghz with an UHD620 GPU 
> against a Pentium Gold, and the Pentium wins hands down?
>
> I would really *love* to get blender up even only to Pentium 
> speed. Blender with simple models in solid mode should *fly* on 
> my 
> X1, same with a few Grease Pencil strokes…
>
>
> Any ideas, help, suggestion?
>
> Thanks, Mathias


-- 
Mathias Picker                        
Geschäftsführer
Mathias.Picker at virtual-earth.de

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