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Limit the device access memory to 4 GB

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Hardly limiting the device access memory to 4 GB for integrated vulkan devices here. This works for the Steam Deck in order not to go above 4 GB VRAM usage any more (above this value the likelihood to crash when the RAM exceeds 12 GB as well raises).

But there will be perhaps a detection mechanism necessary for detecting the real memory limit for integrated vulkan devices. Those likely might have small limits anyway, but what about integrated GPUs on machines with > 16 GB RAM, aka larger amounts ?
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scorpion81 2023-05-22 16:48:55 +02:00 committed by GitHub
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commit f8e7b44d28
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src/video_core/vulkan_common/vulkan_device.cpp
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@ -1034,7 +1034,7 @@ void Device::CollectPhysicalMemoryInfo() {
} }
const s64 available_memory = static_cast<s64>(device_access_memory - device_initial_usage); const s64 available_memory = static_cast<s64>(device_access_memory - device_initial_usage);
device_access_memory = static_cast<u64>(std::max<s64>( device_access_memory = static_cast<u64>(std::max<s64>(
std::min<s64>(available_memory - 8_GiB, 4_GiB), static_cast<s64>(local_memory))); std::min<s64>(available_memory - 8_GiB, 4_GiB), std::min<s64>(local_memory, 4_GiB)));
} }
void Device::CollectToolingInfo() { void Device::CollectToolingInfo() {