Emulator Issues #13469
closedSin and Punishment (N64 Virtual Console) Emulated Slowdown in Intense Areas
0%
Description
Sin & Punishment
NAJN01 (000100014e414a4e)
MD5: 3ee71e738f3ae53a17a40d263dd06a03
What's the problem? Describe what went wrong.
The game slows down in certain areas of the game, however, unlike a traditional slowdown, audio still plays at normal speed, and VPS reports itself as ~60FPS. On real hardware, this slowdown is not present.
What steps will reproduce the problem?
The very beginning of stage 2-1 has very noticeable slowdown when you start the stage, however, this issue is most noticeable during the Crawfish Seemer fight in stage 2-1 where the FPS goes from 30 to ~24. It is present earlier in the stage as well at certain points. You can see what I mean by comparing the footage from the emulated version (https://www.youtube.com/watch?v=zJnzLiTK_Kk&t=990s) vs real hardware. (https://youtu.be/k8Ee-G9R_JI?t=1411). Increasing the percentage of the emulated CPU does alleviate this issue.
Is the issue present in the latest development version? For future reference, please also write down the version number of the latest development version.
5.0-21039
Is the issue present in the latest stable version?
Yes, 5.0-21039
If your issue is a graphical issue, please attach screenshots and record a three frame fifolog of the issue if possible. Screenshots showing what it is supposed to look like from either console or older builds of Dolphin will help too. For more information on how to use the fifoplayer, please check here: https://wiki.dolphin-emu.org/index.php?title=FifoPlayer
I don't know if it's relevant, but I've attached a fifo log of three frames during the fight with the Crawfish Seemer.
What are your PC specifications? (CPU, GPU, Operating System, more)
https://pcpartpicker.com/list/R49DLs
I'm running Windows 10 22H2 19045.3930
Is there anything else that can help developers narrow down the issue? (e.g. logs, screenshots,
configuration files, savefiles, savestates)
Here is a savestate during the fight: https://files.catbox.moe/0mhuko.sav
Files
Updated by JosJuice 11 months ago
- Related to Emulator Issues #12831: Ocarina of Time (WiiVC) has considerably more lag frames than hardware added
Updated by JosJuice 11 months ago
- Subject changed from Sin and Punishment (N64 Virtual Console) Strange Slowdown in Intense Areas to Sin and Punishment (N64 Virtual Console) Emulated Slowdown in Intense Areas
Dolphin's modeling of how long CPU instructions take to execute is known to be inaccurate. Usually this manifests as the emulated system being able to finish its work faster than a real system, but in the cases of video decoding and N64 emulation specifically, the opposite happens. For now, increasing the emulated CPU clock is a good workaround.
Updated by JosJuice 11 months ago
- Is duplicate of Emulator Issues #11330: Dolphin's Emulated CPU is Too Slow/Fast in Various Situations added