From caccc05fb2f656ce774e6a025808d04ad3228144 Mon Sep 17 00:00:00 2001
From: Kyoskii <125975056+Kyoskii@users.noreply.github.com>
Date: Sat, 1 Nov 2025 14:20:45 +0000
Subject: [PATCH] buffer_cache: smaller regions (#3764)

* buffer_cache: smaller regions

this was a change back between v0.9.0 to v0.10.0
https://github.com/raphaelthegreat/shadPS4/commit/9f37ede336f589abfd4ac34f8194ce2e8db30d4e

reverting the TRACKER_HIGHER_PAGE_BITS from 24 to 22 gives a notable increase to performance.

* Update region_definitions.h

updated copyright
---
 src/video_core/buffer_cache/region_definitions.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/video_core/buffer_cache/region_definitions.h b/src/video_core/buffer_cache/region_definitions.h
index 76e7ee263..260047d40 100644
--- a/src/video_core/buffer_cache/region_definitions.h
+++ b/src/video_core/buffer_cache/region_definitions.h
@@ -1,4 +1,4 @@
-// SPDX-FileCopyrightText: Copyright 2024 shadPS4 Emulator Project
+// SPDX-FileCopyrightText: Copyright 2025 shadPS4 Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
 #pragma once
@@ -11,7 +11,7 @@ namespace VideoCore {
 constexpr u64 TRACKER_PAGE_BITS = 12; // 4K pages
 constexpr u64 TRACKER_BYTES_PER_PAGE = 1ULL << TRACKER_PAGE_BITS;
 
-constexpr u64 TRACKER_HIGHER_PAGE_BITS = 24; // each region is 16MB
+constexpr u64 TRACKER_HIGHER_PAGE_BITS = 22; // each region is 4MB
 constexpr u64 TRACKER_HIGHER_PAGE_SIZE = 1ULL << TRACKER_HIGHER_PAGE_BITS;
 constexpr u64 TRACKER_HIGHER_PAGE_MASK = TRACKER_HIGHER_PAGE_SIZE - 1ULL;
 constexpr u64 NUM_PAGES_PER_REGION = TRACKER_HIGHER_PAGE_SIZE / TRACKER_BYTES_PER_PAGE;