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Author Topic: Sudden FPS drop?  (Read 4340 times)

9tails

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Sudden FPS drop?
« on: March 12, 2016, 12:51:33 pm »
Is there some reason that a relatively new fort with 30 dwarves would go from a nice stable 70 DPS down to _9_ suddenly and for no known reason?  I had a very nice fortress ticking along when it suddenly become unplayable.
« Last Edit: March 12, 2016, 01:06:56 pm by 9tails »
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Edward_Tohr

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Re: Sudden FPS drop?
« Reply #1 on: March 12, 2016, 01:18:11 pm »
Do you have a non-pet-passable door somewhere?
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Quote from: Quietust on May 07, 2016, 08:34:48 pm
Quote from: DolosusDoleus on May 07, 2016, 06:10:55 pm
Quietust, what would we ever do without you and your endless knowledge of v0.23a?
I was going to say "fail spectacularly", but you guys seem to be doing a great job of that already.

PatrikLundell

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Re: Sudden FPS drop?
« Reply #2 on: March 12, 2016, 01:37:21 pm »
As Edward_Tohr said, there is a bug with animals trying to path through animal locked doors that cripples the FPS. The animal does not need to be a domestic one either.

Edit: Worked around by unlocking the door or killing the FPS killer.
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9tails

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Re: Sudden FPS drop?
« Reply #3 on: March 12, 2016, 02:08:46 pm »
Hm. I don't think I set any doors to animal-impassible around the time i lost the FPS, but I'll keep an eye out for that in the future.  Thanks.
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Broseph Stalin

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Re: Sudden FPS drop?
« Reply #4 on: March 12, 2016, 02:59:33 pm »
Have you hit the caverns? When my FPS drop suddenly crashes one of the first things I check for is a fiery FB hugging trees underground.
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Vuohijumala

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Re: Sudden FPS drop?
« Reply #5 on: March 14, 2016, 04:15:21 am »
I experienced a sudden slowdown at one point. The reason behind it was one of my herbalists stuck in a tree. I guess he was constantly trying to path his way out of there. As soon as I felled the tree, everything went back to normal again.
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Uggh

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Re: Sudden FPS drop?
« Reply #6 on: March 14, 2016, 04:37:30 am »
You might also have defined a zone with some unpassable tiles (e.g. tiles in open space). I had a sudden drop when I tried to make a duck pond and set a zone covering the space above the water.
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Wilm0chimp

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Re: Sudden FPS drop?
« Reply #7 on: March 14, 2016, 05:51:19 am »
Do you have a prison? I suffered a temporary big fps hit when my booknerd was jailed, causing constant jab cancellation spam. My log was "cancelled because jailed x 5608" so the guy was going apeshit trying to path to his office but couldn't.
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hanni79

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Re: Sudden FPS drop?
« Reply #8 on: May 16, 2016, 09:40:10 am »
Huh, I also just got an Sudden FPS death, dropped from 30(23) down to 2(2) Oo ...

... and I can't find any obvious pathing problems, announcements also are inconclusive. I hope I can figure this out, 2 fps is unplayable  :-[
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Findulidas

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Re: Sudden FPS drop?
« Reply #9 on: May 16, 2016, 10:03:51 am »
You should take a look at this. Its a page about reducing fps but some of it is also advice for not getting sudden fps drops. Things like giving your engravers a huge area to smooth easily cripples fps by a huge marigin by itself.

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Quote from: Archereon on April 08, 2016, 01:16:38 pm
...wonderful memories of the creeping sense of dread...

Adam Mantine

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Re: Sudden FPS drop?
« Reply #10 on: May 16, 2016, 01:39:26 pm »
What about flowing water or magma? Any of that? Especially any that's recently been rerouted? I've heard that that can cause fps problems too.
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hanni79

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Re: Sudden FPS drop?
« Reply #11 on: May 16, 2016, 02:29:48 pm »
Found my problem -.-

I have a danger room and one of my Soldiers dodged into a forbidden door. Then he went to the wrong side ( the other side was also defined as barrack). After it closed, he wasn't able to get out again, but it seems forbidden doors can be dodged into.....
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PatrikLundell

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Re: Sudden FPS drop?
« Reply #12 on: May 16, 2016, 05:27:20 pm »
Since it's possible to tunnel through walls on a dodge it wouldn't be strange to do it through a mere wall... I think someone said the code only checks the landing tile on a dodge, not the tile(s) in between.
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Quietust

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Re: Sudden FPS drop?
« Reply #13 on: May 16, 2016, 06:48:49 pm »
Lag can also arise if a Werebeast is scheduled to invade your fortress but is unable to arrive for various reasons (such as the wrong phase of the moon).
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P.S. If you don't get this note, let me know and I'll write you another.
Quote from: Lord Dakoth on September 17, 2009, 10:47:58 pm
It's amazing how dwarves can make a stack of bones completely waterproof and magmaproof.
Quote from: Neruz on September 18, 2009, 06:58:26 am
It's amazing how they can make an entire floodgate out of the bones of 2 cats.

Regu1us

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Re: Sudden FPS drop?
« Reply #14 on: March 11, 2020, 12:23:33 am »
For me I had walled someone into a small space (with some werebeasts)  and they went meloncholy. After the werebeasts transformed and killed him, FPS went back to normal. So I suspect differences in meloncholy pathfinding from normal caused him to reprocess a lot. There were a lot of doors in the space, which may have been locked. So that might have affected it.
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