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[VK] Refine VRAM allocation strategy for improved stability and performance (#334)

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These adjustments enhance memory management,
While increasing shader performance across all GPU types, including iGPUs.
This commit fixes a bug in Super Mario Odyssey where loading into a new area or pausing the game
Would cause the whole game to slow down (Most noticeable on RDNA 2 GPUs like the Steam Deck)

Thank you to all of our testers for helping eliminate this bug,
And thank you to Camille for the instructions/commit and to Zephyron for addressing this in Citron.

Co-authored-by: JPikachu <jpikachu.eden@gmail.com>
Reviewed-on: eden-emu/eden#334
Reviewed-by: CamilleLaVey <camillelavey99@gmail.com>
Co-authored-by: JPikachu <jpikachu@eden-emu.dev>
Co-committed-by: JPikachu <jpikachu@eden-emu.dev>
This commit is contained in:
JPikachu 2025-08-27 22:19:17 +02:00 • committed by crueter
parent 9fae048a5a
commit 37375220e8
Signed by untrusted user: crueter
GPG key ID: 425ACD2D4830EBC6
1 changed files with 4 additions and 4 deletions
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8
src/video_core/vulkan_common/vulkan_device.cpp
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@ -1378,13 +1378,13 @@ void Device::CollectPhysicalMemoryInfo() {
device_access_memory += mem_properties.memoryHeaps[element].size;
}
if (!is_integrated) {
const u64 reserve_memory = std::min<u64>(device_access_memory / 8, 1_GiB);
const u64 reserve_memory = std::min<u64>(device_access_memory / 4, 2_GiB);
device_access_memory -= reserve_memory;
if (Settings::values.vram_usage_mode.GetValue() != Settings::VramUsageMode::Aggressive) {
// Account for resolution scaling in memory limits
const size_t normal_memory = 6_GiB;
const size_t scaler_memory = 1_GiB * Settings::values.resolution_info.ScaleUp(1);
const size_t normal_memory = 8_GiB;
const size_t scaler_memory = 2_GiB * Settings::values.resolution_info.ScaleUp(1);
device_access_memory =
std::min<u64>(device_access_memory, normal_memory + scaler_memory);
}
@ -1393,7 +1393,7 @@ void Device::CollectPhysicalMemoryInfo() {
}
const s64 available_memory = static_cast<s64>(device_access_memory - device_initial_usage);
device_access_memory = static_cast<u64>(std::max<s64>(
std::min<s64>(available_memory - 8_GiB, 4_GiB), std::min<s64>(local_memory, 4_GiB)));
std::min<s64>(available_memory - 4_GiB, 6_GiB), std::min<s64>(local_memory, 6_GiB)));
}
void Device::CollectToolingInfo() {