[PR #3070] [MERGED] video_core: Page manager/region manager optimization #3195

New issue

Closed

opened 2026-02-27 22:02:47 +03:00 by kerem · 0 comments

kerem commented

2026-02-27 22:02:47 +03:00

Owner

📋 Pull Request Information

Original PR: https://github.com/shadps4-emu/shadPS4/pull/3070
Author: @LNDF
Created: 6/9/2025
Status: ✅ Merged
Merged: 6/20/2025
Merged by: @georgemoralis

Base: main ← Head: memory-tracker

📝 Commits (10+)

ab20598 Bit array test
331e366 Some corrections
3c4dce5 Fix AVX path on SetRange
0a11c48 Finish bitArray
cfad5c9 Batched protect progress
bf10666 Inclusion fix
14a33d3 Last logic fixes for BitArray
2fc62b5 Page manager: batch protect, masked ranges
6b60a85 Page manager bitarray
ed1e3c5 clang-format

📊 Changes

10 files changed (+786 additions, -366 deletions)

View changed files

📝 CMakeLists.txt (+4 -2)
➕ src/common/bit_array.h (+411 -0)
📝 src/video_core/buffer_cache/buffer_cache.h (+1 -1)
📝 src/video_core/buffer_cache/memory_tracker.h (+1 -1)
➕ src/video_core/buffer_cache/region_definitions.h (+28 -0)
➕ src/video_core/buffer_cache/region_manager.h (+208 -0)
➖ src/video_core/buffer_cache/word_manager.h (+0 -296)
📝 src/video_core/page_manager.cpp (+123 -62)
📝 src/video_core/page_manager.h (+7 -1)
📝 src/video_core/texture_cache/texture_cache.cpp (+3 -3)

📄 Description

Rewrite parts of the page manager and region manager to be faster

Use a bit array that uses AVX to accelerate.
Also tries to batch mprotects in the same region (another pr is needed to take advantage of this)

I have done zero testing right now with this and i rewrote parts of the memory tracker so there is a very high chance I broke something.

This is part of a series of PR with the hope of improving performance of games that use DMA, since it is currently quite slow (mainly because the ammount of memory protections and synced buffers).

_{🔄 This issue represents a GitHub Pull Request. It cannot be merged through Gitea due to API limitations.}

## 📋 Pull Request Information **Original PR:** https://github.com/shadps4-emu/shadPS4/pull/3070 **Author:** [@LNDF](https://github.com/LNDF) **Created:** 6/9/2025 **Status:** ✅ Merged **Merged:** 6/20/2025 **Merged by:** [@georgemoralis](https://github.com/georgemoralis) **Base:** `main` ← **Head:** `memory-tracker` --- ### 📝 Commits (10+) - [`ab20598`](https://github.com/shadps4-emu/shadPS4/commit/ab20598c99fb5a4f160408c0b869602e1816faea) Bit array test - [`331e366`](https://github.com/shadps4-emu/shadPS4/commit/331e3661a16e08514bc07bfdde994cae6f2cd714) Some corrections - [`3c4dce5`](https://github.com/shadps4-emu/shadPS4/commit/3c4dce5418a87fd2b82207e2994834b422578a98) Fix AVX path on SetRange - [`0a11c48`](https://github.com/shadps4-emu/shadPS4/commit/0a11c4869340dcae00787efc56382780ea7a4b9a) Finish bitArray - [`cfad5c9`](https://github.com/shadps4-emu/shadPS4/commit/cfad5c9596b1620925791cc19c94c9b195161a2a) Batched protect progress - [`bf10666`](https://github.com/shadps4-emu/shadPS4/commit/bf106665785f0d4656444e1ca3aca53b4ead29f0) Inclusion fix - [`14a33d3`](https://github.com/shadps4-emu/shadPS4/commit/14a33d35a2fd1e4aa996205b545ffa0e562276d3) Last logic fixes for BitArray - [`2fc62b5`](https://github.com/shadps4-emu/shadPS4/commit/2fc62b5b5fa42f39c1a01c040eb48b026b891434) Page manager: batch protect, masked ranges - [`6b60a85`](https://github.com/shadps4-emu/shadPS4/commit/6b60a8515f71b0502bbd3a551c86d0a737b22c3c) Page manager bitarray - [`ed1e3c5`](https://github.com/shadps4-emu/shadPS4/commit/ed1e3c56efd8399e9c4a818ea0cd0cefd292bfd4) clang-format ### 📊 Changes **10 files changed** (+786 additions, -366 deletions) <details> <summary>View changed files</summary> 📝 `CMakeLists.txt` (+4 -2) ➕ `src/common/bit_array.h` (+411 -0) 📝 `src/video_core/buffer_cache/buffer_cache.h` (+1 -1) 📝 `src/video_core/buffer_cache/memory_tracker.h` (+1 -1) ➕ `src/video_core/buffer_cache/region_definitions.h` (+28 -0) ➕ `src/video_core/buffer_cache/region_manager.h` (+208 -0) ➖ `src/video_core/buffer_cache/word_manager.h` (+0 -296) 📝 `src/video_core/page_manager.cpp` (+123 -62) 📝 `src/video_core/page_manager.h` (+7 -1) 📝 `src/video_core/texture_cache/texture_cache.cpp` (+3 -3) </details> ### 📄 Description Rewrite parts of the page manager and region manager to be faster Use a bit array that uses AVX to accelerate. Also tries to batch mprotects in the same region (another pr is needed to take advantage of this) I have done zero testing right now with this and i rewrote parts of the memory tracker so there is a very high chance I broke something. This is part of a series of PR with the hope of improving performance of games that use DMA, since it is currently quite slow (mainly because the ammount of memory protections and synced buffers). --- <sub>🔄 This issue represents a GitHub Pull Request. It cannot be merged through Gitea due to API limitations.</sub>