[GH-ISSUE #3026] [Feature Request]: Is there a way we could know how many frames of input lag there is? #959

New issue

Closed

opened 2026-02-27 21:09:10 +03:00 by kerem · 3 comments

kerem commented

2026-02-27 21:09:10 +03:00

Owner

Originally created by @tncrdn on GitHub (Jun 2, 2025).
Original GitHub issue: https://github.com/shadps4-emu/shadPS4/issues/3026

Checklist

I have searched for a similar issue in this repository and did not find one.

Description

If there is no way to test it ourselves like frame advancing with the K key in Retroarch, is there a minimum number of frames of lag caused by the emulation itself or there isn't any lag added on top of the original, therefore there is no difference in terms of lag compared to playing on an actual PS4?

Reason

I'd like the input lag of a game to be the same as the actual hardware if possible.

Examples

No response

Originally created by @tncrdn on GitHub (Jun 2, 2025). Original GitHub issue: https://github.com/shadps4-emu/shadPS4/issues/3026 ### Checklist - [x] I have searched for a similar issue in this repository and did not find one. ### Description If there is no way to test it ourselves like frame advancing with the K key in Retroarch, is there a minimum number of frames of lag caused by the emulation itself or there isn't any lag added on top of the original, therefore there is no difference in terms of lag compared to playing on an actual PS4? ### Reason I'd like the input lag of a game to be the same as the actual hardware if possible. ### Examples _No response_

kerem closed this issue

2026-02-27 21:09:10 +03:00

kerem commented

2026-02-27 21:09:11 +03:00

Author

Owner

@red-prig commented on GitHub (Jun 2, 2025):

The emulator does not introduce any special restrictions, but there is a certain tax on the transmission of PM4 packets to the Vulkan data/commands and this speed depends entirely on your HW

@red-prig commented on GitHub (Jun 2, 2025): The emulator does not introduce any special restrictions, but there is a certain tax on the transmission of PM4 packets to the Vulkan data/commands and this speed depends entirely on your HW

kerem commented

2026-02-27 21:09:11 +03:00

Author

Owner

@tncrdn commented on GitHub (Jun 2, 2025):

The emulator does not introduce any special restrictions, but there is a certain tax on the transmission of PM4 packets to the Vulkan data/commands and this speed depends entirely on your HW

Thank you. Is it more dependent on CPU or GPU or both?

@tncrdn commented on GitHub (Jun 2, 2025): > The emulator does not introduce any special restrictions, but there is a certain tax on the transmission of PM4 packets to the Vulkan data/commands and this speed depends entirely on your HW Thank you. Is it more dependent on CPU or GPU or both?

kerem commented

2026-02-27 21:09:11 +03:00

Author

Owner

@red-prig commented on GitHub (Jun 2, 2025):

both

@red-prig commented on GitHub (Jun 2, 2025): both

kerem referenced this issue

2026-02-27 21:14:12 +03:00

[PR #959] [CLOSED] Use a singleton for instruction decoding #1851