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Merge pull request #5987 from Plagman/plagman/re-key_mr

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DiskCache: adjust key strategy
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Ryan Houdek authored and GitHub committed 2026-09-24 11:55:40 -07:00
2 parents 4e5c18113a b37aae728f
commit 72b2ff88ae
1 file changed
+13 -9
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FEXCore/Source/Interface/Core/DiskCache.cpp
+13 -9
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@@ -367,28 +367,32 @@ namespace DiskCache {
struct __attribute__((packed)) {
uint16_t FormatVersion;
uint8_t Is64BitMode;
uint64_t HostFeaturesHash;
} BucketHeader = {FormatVersion, CTX->Config.Is64BitMode, CTX->HostFeatures.HashForCaching()};
} MachineBucketData = {FormatVersion, CTX->HostFeatures.HashForCaching()};
fextl::vector<uint8_t> BucketBytes;
BucketBytes.resize(sizeof(BucketHeader) + SerializedConfig.size());
memcpy(BucketBytes.data(), &BucketHeader, sizeof(BucketHeader));
memcpy(BucketBytes.data() + sizeof(BucketHeader), SerializedConfig.data(), SerializedConfig.size());
BucketHash = XXH3_128bits(BucketBytes.data(), BucketBytes.size());
fextl::vector<uint8_t> BucketBytes(sizeof(MachineBucketData) + sizeof(uint8_t) + SerializedConfig.size());
memcpy(BucketBytes.data(), &MachineBucketData, sizeof(MachineBucketData));
BucketBytes[sizeof(MachineBucketData)] = CTX->Config.Is64BitMode;
memcpy(BucketBytes.data() + sizeof(MachineBucketData) + 1, SerializedConfig.data(), SerializedConfig.size());
uint64_t MachineBucketHash = XXH3_64bits(BucketBytes.data(), sizeof(MachineBucketData));
uint64_t ProcessBucketHash = XXH3_64bits(BucketBytes.data() + sizeof(MachineBucketData), 1 + SerializedConfig.size());
BucketHash.high64 = MachineBucketHash;
BucketHash.low64 = ProcessBucketHash;
fextl::string BasePath = BasePathOverride();
if (BasePath.empty()) {
BasePath = FEXCore::Config::GetCacheDirectory() + "DiskCache/";
BasePath += fextl::fmt::format("{:016x}{:016x}", BucketHash.high64, BucketHash.low64) + "/";
}
BasePath += fextl::fmt::format("{:016x}", MachineBucketHash) + "/";
FHU::Filesystem::CreateDirectories(BasePath);
// todo could kick off clean up of leftover MachineBucketHash sibling directories here
if (!MapDiskCacheFiles) {
FileMapper = nullptr;
}
fextl::string RWDBBasePath = BasePath + "RWCacheDB";
const auto RWDBBasePath = fextl::fmt::format("{}RWCacheDB_{:016x}", BasePath, ProcessBucketHash);
OpenCacheDB(RWDBBasePath, false);
if (RWCacheDB && !FoundMetadata) {