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[Vulkan] Keep the pipeline cache in memory on Windows 

The GPU driver keeps its own shader cache on disk, and the shader prewarm
list rebuilds it after an update, so Windows no longer writes the driver
cache file by default. SHARPEMU_VK_PIPELINE_CACHE=file keeps one; Linux
keeps the file and macOS keeps its shards.
This commit is contained in:
ParantezTech 2026-10-03 02:33:41 +03:00
parent 3ba3650f59
commit ed70f697a3
1 changed files with 13 additions and 8 deletions
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21
src/SharpEmu.Libs/VideoOut/VulkanVideoPresenter.Device.Setup.cs
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@ -1197,6 +1197,11 @@ internal static unsafe partial class VulkanVideoPresenter
private void CreatePipelineCache()
{
var cacheMode = Environment.GetEnvironmentVariable("SHARPEMU_VK_PIPELINE_CACHE");
// MoltenVK imports compile every cached MSL library. Load shader
// groups on demand on macOS so a mature cache cannot hold startup
// behind unrelated scenes. Keep explicit overrides for comparison.
var shardMode = Environment.GetEnvironmentVariable("SHARPEMU_VK_PIPELINE_CACHE_SHARDS");
var useShards = shardMode == "1" || (shardMode is null && OperatingSystem.IsMacOS());
// Vulkan cache blobs carry the implementation's compatibility
// header and are rejected/rebuilt below when the device or driver
// changes. MoltenVK compilation of a large translated shader can
@ -1204,13 +1209,9 @@ internal static unsafe partial class VulkanVideoPresenter
// much more harmful than using Vulkan's normal persistence path.
// Keep an explicit opt-out for diagnostics and read-only systems.
var persistentCacheEnabled =
!string.Equals(cacheMode, "0", StringComparison.Ordinal);
!string.Equals(cacheMode, "0", StringComparison.Ordinal) &&
(useShards || !OperatingSystem.IsWindows() || cacheMode is "1" or "file");
_pipelineCachePath = persistentCacheEnabled ? GetPipelineCachePath() : null;
// MoltenVK imports compile every cached MSL library. Load shader
// groups on demand on macOS so a mature cache cannot hold startup
// behind unrelated scenes. Keep explicit overrides for comparison.
var shardMode = Environment.GetEnvironmentVariable("SHARPEMU_VK_PIPELINE_CACHE_SHARDS");
var useShards = shardMode == "1" || (shardMode is null && OperatingSystem.IsMacOS());
if (_pipelineCachePath is not null &&
useShards)
{
@ -1273,8 +1274,12 @@ internal static unsafe partial class VulkanVideoPresenter
if (_pipelineCachePath is null)
{
Console.Error.WriteLine(
"[LOADER][INFO] Vulkan pipeline cache ready: memory-only " +
"(persistence disabled with SHARPEMU_VK_PIPELINE_CACHE=0).");
string.Equals(cacheMode, "0", StringComparison.Ordinal)
? "[LOADER][INFO] Vulkan pipeline cache ready: memory-only " +
"(persistence disabled with SHARPEMU_VK_PIPELINE_CACHE=0)."
: "[LOADER][INFO] Vulkan pipeline cache ready: memory-only " +
"(the driver shader cache and the shader prewarm list replace the cache file; " +
"SHARPEMU_VK_PIPELINE_CACHE=file keeps one).");
}
else
{