secondlife / secondlife/viewer

[MAC] Periodic framerate fluctuation at certain places

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bug macos maint-pe team:viewer
Dominant language
C++
Stars
299
Forks
146
Avg merge
1d 9h
Merged PRs (30d)
88

Description

Environment (RELEASE 7.1.3.7878383867 - Emoji , I think)

CPU: Apple M2 Pro (2400 MHz)

Memory: 16384 MB

OS Version: Mac OS X 14.2.1 Darwin 23.2.0 Darwin Kernel Version 23.2.0: Wed Nov 15 21:55:06 PST 2023; root:xnu-10002.61.3~2/RELEASE_ARM64_T6020 x86_64

Graphics Card Vendor: Apple

Graphics Card: Apple M2 Pro

OpenGL Version: 4.1 Metal - 88

Window size: 1800x1097

Font Size Adjustment: 96pt

UI Scaling: 1.2

Draw distance: 64m

Bandwidth: 3000kbit/s

LOD factor: 1.875

Render quality: 1

Advanced Lighting Model: Enabled

Texture memory: 10922MB

Disk cache: Max size 409.6 MB (99.7% used)

HiDPI display mode: 0

At certain places, the framerate is fluctuating periodically: about 2 seconds smooth then 3 seconds stuttery, and so on. This is observed and might be limited to Apple Silicon mac.

https://secondlife.canny.io/admin/board/bug-reports/p/mac-periodic-framerate-fluctuation-at-certain-places

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

No files, tests, or entry points are named. Start by reproducing the periodic frame-rate fluctuation at the affected places on Apple Silicon using the reported environment, then measure where the timing changes occur. Done means the cause is identified and the alternating smooth and stuttery behavior no longer occurs.

Written by the indexing model from the issue text.

Assessment

Tech stack
cpp, macos
Domain
desktop, performance
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
25/100

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