Single digit frame rates in the east side of Port Telvannis in Tamriel Rebuilt

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vk1970
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Joined: 10 Mar 2017, 22:57

Single digit frame rates in the east side of Port Telvannis in Tamriel Rebuilt

Post by vk1970 »

Has anyone else experienced this?
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Mantar
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Joined: 17 Jul 2020, 23:32

Re: Single digit frame rates in the east side of Port Telvannis in Tamriel Rebuilt

Post by Mantar »

Just checked with the debug spawn thing in the launcher, and it looks like a physics thing is happening. I get a good 25-50 fps with my cpu unthrottled, but at least half of that is spent running physics, which is severely cpu bound. I find if I cut my cpu down to 2.1 Ghz (from 3.6) I get like 4 fps, as physics calculations start to overrun and drag everything to a crawl.
Try adding a background physics thread or two if you've got multiple cores sitting around. Otherwise, try setting the environment variable:

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$ OPENMW_PHYSICS_FRAMERATE=30 ./openmw
on the command line and that should make it playable with your cpu. Just be aware that there might be side effects to cutting the physics framerate.
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psi29a
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Re: Single digit frame rates in the east side of Port Telvannis in Tamriel Rebuilt

Post by psi29a »

Which version of OpenMW? We've come a long way since 0.46 for example...
CMAugust
Posts: 285
Joined: 10 Jan 2016, 00:13

Re: Single digit frame rates in the east side of Port Telvannis in Tamriel Rebuilt

Post by CMAugust »

Confirmed that the issue is present in recent nightlies; physics quickly enters a death spiral when the ever-problematic slave cages and their NPCs are visible. Wareya is looking into it.
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