DECLARE_DEBUG_VARIABLE(std::string, OverrideGdiPath, std::string("unk"), "When different value than \"unk\", will override default path to gdi library.")
DECLARE_DEBUG_VARIABLE(std::string, AubDumpAddMmioRegistersList, std::string("unk"), "Semicolon separated sequence of additional MMIO registers offset;values pairs i.e. 0x111;0x123;0x222;0x456")
DECLARE_DEBUG_VARIABLE(bool, AUBDumpAllocsOnEnqueueReadOnly, false, "Force dumping buffers and images on clEnqueueReadBuffer/Image only (blocking calls)")
DECLARE_DEBUG_VARIABLE(bool, CleanStateInPreamble, false, "Ensures clean state in preamble.")
DECLARE_DEBUG_VARIABLE(bool, EnableStatelessCompressionWithUnifiedMemory, false, "Enable stateless compression with unified memory")
DECLARE_DEBUG_VARIABLE(bool, UseClearColorAllocationForBlitter, false, "false: disable (default), true: enable. If set then clear color allocation for blitter operations is created.")
DECLARE_DEBUG_VARIABLE(bool, EnableMultiGpuAtomicsOptimization, true, "Enable multi GPU atomics optimization")
DECLARE_DEBUG_VARIABLE(bool, DisableCachingForHeaps, false, "When set driver will not cache heaps in L3/L1.")
DECLARE_DEBUG_VARIABLE(bool, GlobalSequencerFlushOnCopyEngine, false, "false: disable (default), true: enable. If set then global sequencer flash is added for blitter")
DECLARE_DEBUG_VARIABLE(bool, UseImmDataWriteModeOnPostSyncOperation, false, "Use IMM data write mode as post sync operation in Compute Walker")
DECLARE_DEBUG_VARIABLE(bool, EnableResourceTags, false, "Enable resource tagging in GMM")
DECLARE_DEBUG_VARIABLE(bool, AllowMixingRegularAndCooperativeKernels, false, "true: driver allows mixing regular and cooperative kernels in a single command list and in a single execute")
DECLARE_DEBUG_VARIABLE(std::string, FilterDeviceId, std::string("unk"), "Device id filter, adapter matching device id will be opened. Ignored when unk.")
DECLARE_DEBUG_VARIABLE(std::string, FilterBdfPath, std::string("unk"), "Linux-only, BDF path filter, only matching paths will be opened. Ignored when unk.")
DECLARE_DEBUG_VARIABLE(std::string, LoadBinarySipFromFile, std::string("unk"), "Select binary file to load SIP kernel raw binary. When file named *_header.* exists, it is used as header")
DECLARE_DEBUG_VARIABLE(int64_t, OverrideMultiStoragePlacement, -1, "-1: disable, 0+: tile mask, each bit corresponds to tile")
DECLARE_DEBUG_VARIABLE(int64_t, ForceCompressionDisabledForCompressedBlitCopies, -1, "-1: default, 0: disabled, 1: enabled. If compression is required, set AUX_CCS_E, but force CompressionEnable filed. 0 should result in uncompressed read/write")
DECLARE_DEBUG_VARIABLE(int32_t, ForceL1Caching, -1, "-1: default, 0: disable, 1: enable, When set to true driver will program L1 cache policy for surface state and stateless accessess")
DECLARE_DEBUG_VARIABLE(int32_t, OverrideStatelessMocsIndex, -1, "-1: feature inactive, >=0 : following MOCS index will be programmed for stateless accesses in state base address (for regular buffers)")
DECLARE_DEBUG_VARIABLE(int32_t, OverrideMocsIndexForScratchSpace, -1, "-1: feature inactive, >=0 : following MOCS index will be programmed for stateful accesses in surface state for scratch space")
DECLARE_DEBUG_VARIABLE(int32_t, DoCpuCopyOnReadBuffer, -1, "-1: default 0: do not use CPU copy, 1: triggers CPU copy path for Read Buffer calls, only supported for some basic use cases (no blocked user events in dependencies tree)")
DECLARE_DEBUG_VARIABLE(int32_t, DoCpuCopyOnWriteBuffer, -1, "-1: default 0: do not use CPU copy, 1: triggers CPU copy path for Write Buffer calls, only supported for some basic use cases (no blocked user events in dependencies tree)")
DECLARE_DEBUG_VARIABLE(int32_t, PauseOnEnqueue, -1, "-1: default, -2: always, x: pause on enqueue number x and ask for user confirmation before and after execution, counted from 0")
DECLARE_DEBUG_VARIABLE(int32_t, PauseOnBlitCopy, -1, "-1: default, -2: always, x: pause on blit enqueue number x and ask for user confirmation before and after execution, counted from 0. Note that single blit enqueue may have multiple copy instructions")
DECLARE_DEBUG_VARIABLE(int32_t, PauseOnGpuMode, -1, "-1: default (before and after), 0: before only, 1: after only")
DECLARE_DEBUG_VARIABLE(int32_t, MultiStorageGranularity, -1, "Forces granularity for chunk size and mapping colouring policies: -1: default 64 kB, >0 - enabled chunk size based colouring with granularity in kb (should be multiple of 64kb page size, because of alignment restrictions)")
DECLARE_DEBUG_VARIABLE(int32_t, EnableMockSourceLevelDebugger, 0, "Switches driver to mode with active debugger. Active modes: 1: opt-disabled, 2: opt-enabled")
DECLARE_DEBUG_VARIABLE(int32_t, MultiTileIsaPlacement, -1, "Place ISA allocation on multi tiles, -1 - default, 0 - disabled, 1 - enabled")
DECLARE_DEBUG_VARIABLE(int32_t, FormatForStatelessCompressionWithUnifiedMemory, 0xF, "Format for stateless compression with unified memory")
DECLARE_DEBUG_VARIABLE(int32_t, ForceMultiGpuPartialWritesInComputeMode, -1, "-1: default - 0 for multiOsContext capable, 0: program value 0 in MultiGpuPartialWrites bit in STATE_COMPUTE_MODE, 1: program value 1 in MultiGpuPartialWrites bit in STATE_COMPUTE_MODE,")
DECLARE_DEBUG_VARIABLE(int32_t, ForceMultiGpuPartialWrites, -1, "-1: default - 0 for multiOsContext capable, 0: program value 0 in MultiGpuPartialWrites controls 1: program value 1 in MultiGpuPartialWrites controls")
DECLARE_DEBUG_VARIABLE(int32_t, ForceMultiGpuAtomicsInComputeMode, -1, "-1: default - 0 for multiOsContext capable, 0: program value 0 in MultiGpuAtomics bit in STATE_COMPUTE_MODE, 1: program value 1 in MultiGpuAtomics bit in STATE_COMPUTE_MODE")
DECLARE_DEBUG_VARIABLE(int32_t, ForceMultiGpuAtomics, -1, "-1: default - 0 for multiOsContext capable, 0: program value 0 in MultiGpuAtomics controls 1: program value 1 in MultiGpuAtomics controls")
DECLARE_DEBUG_VARIABLE(int32_t, ForceBufferCompressionFormat, -1, "-1: default, >0: Format value")
DECLARE_DEBUG_VARIABLE(int32_t, EnableHwGenerationLocalIds, -1, "-1: default, 0: disable, 1: enable : Enables generation of local ids on HW")
DECLARE_DEBUG_VARIABLE(int32_t, WalkerPartitionPreferHighestDimension, -1, "-1: default, 0: prefer biggest dimension, 1: prefer Z over Y over X if they divide partition count evenly")
DECLARE_DEBUG_VARIABLE(int32_t, SetMinimalPartitionSize, -1, "-1 default value set to 512 workgroups, 0 - disabled, >0 - minimal partition size in workgroups (should be power of 2)")
DECLARE_DEBUG_VARIABLE(int32_t, OverrideBlitterTargetMemory, -1, "-1:default 0: overwrites to System 1: overwrites to Local")
DECLARE_DEBUG_VARIABLE(int32_t, OverridePostSyncMocs, -1, "-1: default, >=0 Override post sync mocs with value")
DECLARE_DEBUG_VARIABLE(int32_t, EnableImmediateVmBindExt, -1, "Use immediate bind extension to a new residency model on Linux (requires kernel support), -1: default (enabled whith direct submission), 0: disabled, 1: enabled")
DECLARE_DEBUG_VARIABLE(int32_t, ForceExecutionTile, -1, "-1: default, 0+: given tile is choosen as submission, must be used with EnableWalkerPartition = 0.")
DECLARE_DEBUG_VARIABLE(int32_t, OverrideL1CacheControlInSurfaceState, -1, "-1: feature inactive, >=0 : following L1 cache control value will be programmed in render surface state (for regular buffers)")
DECLARE_DEBUG_VARIABLE(int32_t, OverrideL1CacheControlInSurfaceStateForScratchSpace, -1, "-1: feature inactive, >=0 : following L1 cache control value will be programmed in render surface state for scratch space")
DECLARE_DEBUG_VARIABLE(int32_t, OverridePreferredSlmAllocationSizePerDss, -1, "-1: default, >=0: program value for preferred SLM allocation size per dss")
DECLARE_DEBUG_VARIABLE(int32_t, ForceZPassAsyncComputeThreadLimit, -1, "-1: default, >0: Limit value in STATE_COMPUTE_MODE")
DECLARE_DEBUG_VARIABLE(int32_t, ForcePixelAsyncComputeThreadLimit, -1, "-1: default, >0: Limit value in STATE_COMPUTE_MODE")
DECLARE_DEBUG_VARIABLE(int32_t, DecompressInL3ForImage2dFromBuffer, -1, "-1: default, 0: WA Disabled, 1: WA enabled - Enable DecompressInL3 for image 2d from compressed buffer")
DECLARE_DEBUG_VARIABLE(int32_t, ToggleHintKernelDisableCompression, -1, "-1: default - use kernel as source of hint, 0: provide hint to disable compression, 1: provide hint to enable compression")
DECLARE_DEBUG_VARIABLE(int32_t, CFEComputeDispatchAllWalkerEnable, -1, "Set Compute Dispatch All Walker flag in CFE_STATE on XE_HPC_CORE platforms, -1: do not set")
DECLARE_DEBUG_VARIABLE(int32_t, ComputeDispatchAllWalkerEnableInComputeWalker, -1, "Set Compute Dispatch All Walker flag in COMPUTE_WALKER on PVC+ platforms, -1: do not set")
DECLARE_DEBUG_VARIABLE(int32_t, ProgramGlobalFenceAsMiMemFenceCommandInCommandStream, -1, "-1: default, 0: disable, 1: enable, System Memory Fence executed as MI_MEM_FENCE command in command stream")
DECLARE_DEBUG_VARIABLE(int32_t, ProgramGlobalFenceAsPostSyncOperationInComputeWalker, -1, "-1: default, 0: disable, 1: enable, System Memory Fence executed as post-sync operation in COMPUTE_WALKER")
DECLARE_DEBUG_VARIABLE(int32_t, ProgramGlobalFenceAsKernelInstructionInEUKernel, -1, "-1: default, 0: disable, 1: enable, System Memory Fence executed as kernel instruction in EU kernel")
DECLARE_DEBUG_VARIABLE(int32_t, DoNotReportTile1BscWaActive, -1, "-1: default, 0: WA Disabled, 1: WA enabled")
DECLARE_DEBUG_VARIABLE(int32_t, ForceTile0PlacementForTile1ResourcesWaActive, -1, "-1: default, 0: WA Disabled, 1: WA enabled")
DECLARE_DEBUG_VARIABLE(int32_t, ClosNumCacheWays, -1, "-1: default, >= 0 Number of cache ways to allocate within previously reserved CLOS regions (0-32)")
DECLARE_DEBUG_VARIABLE(int32_t, EngineUsageHint, -1, "-1: default, >=0: engine usage value to use when creating command queue on user selected engine")
DECLARE_DEBUG_VARIABLE(int32_t, UseDrmVirtualEnginesForCcs, -1, "-1: default, 0: disable, 1: enable, Combine all CCS nodes to single VE (per context)")
DECLARE_DEBUG_VARIABLE(int32_t, UseDrmVirtualEnginesForBcs, -1, "-1: default, 0: disable, 1: enable, Combine all BCS nodes to single VE (per context)")
DECLARE_DEBUG_VARIABLE(int32_t, LimitEngineCountForVirtualBcs, -1, "-1: default, >0 Only use VirtualEngine with limited amount of engines, not max ")
DECLARE_DEBUG_VARIABLE(int32_t, LimitEngineCountForVirtualCcs, -1, "-1: default, >0 Only use VirtualEngine with limited amount of engines, not max ")
DECLARE_DEBUG_VARIABLE(int32_t, UseTileMemoryBankInVirtualMemoryCreation, -1, "-1: default - on, 0: do not assign tile memory bank to virtual memory space, 1: assign tile memory bank to virtual memory space")
DECLARE_DEBUG_VARIABLE(int32_t, OverrideTimestampEvents, -1, "-1: default (based on user settings), 0: Force disable timestamp events (no timestamps will be reported), 1: Force enable timestamp events")
DECLARE_DEBUG_VARIABLE(bool, PrintDebugSettings, false, "Dump all debug variables settings to text file. Print to stdout if value is different than default.")
DECLARE_DEBUG_VARIABLE(bool, PrintProgramBinaryProcessingTime, false, "prints execution time of Program::processGenBinary() method during program building")
DECLARE_DEBUG_VARIABLE(bool, DisableZeroCopyForBuffers, false, "When active all buffer allocations will not share memory with CPU.")
DECLARE_DEBUG_VARIABLE(bool, DisableDcFlushInEpilogue, false, "Disable DC flush in epilogue")
DECLARE_DEBUG_VARIABLE(bool, EnableNullHardware, false, "works on Windows only, sets the Null Hardware flag that makes all Command buffers completed while GPU does nothing")
DECLARE_DEBUG_VARIABLE(bool, ForceLinearImages, false, "Force linear images. Default is Y-tiled.")
DECLARE_DEBUG_VARIABLE(bool, ForceSLML3Config, false, "Forces L3Config with SLM for all kernels")
DECLARE_DEBUG_VARIABLE(bool, Force32bitAddressing, false, "Forces 32 bit addresses to be used in 64 bit dll")
DECLARE_DEBUG_VARIABLE(bool, ForceCsrFlushing, false, "Forces flushing of command stream receiver")
DECLARE_DEBUG_VARIABLE(bool, ForceCsrReprogramming, false, "Forces reprogramming of command stream receiver")
DECLARE_DEBUG_VARIABLE(bool, OmitTimestampPacketDependencies, false, "Clears all node dependences on timestamp packet")
DECLARE_DEBUG_VARIABLE(bool, DisableStatelessToStatefulOptimization, false, "Disables stateless to stateful optimization for buffers")
DECLARE_DEBUG_VARIABLE(bool, UseNoRingFlushesKmdMode, true, "Windows only, passes flag to KMD that informs KMD to not emit any ring buffer flushes.")
DECLARE_DEBUG_VARIABLE(bool, DisableZeroCopyForUseHostPtr, false, "When active all buffer allocations created with CL_MEM_USE_HOST_PTR flag will not share memory with CPU.")
DECLARE_DEBUG_VARIABLE(int32_t, MaxHwThreadsPercent, 0, "If not zero then maximum number of used HW threads is capped to max * MaxHwThreadsPercent / 100")
DECLARE_DEBUG_VARIABLE(int32_t, MinHwThreadsUnoccupied, 0, "If not zero then maximum number of used HW threads is reduced by MinHwThreadsUnoccupied")
DECLARE_DEBUG_VARIABLE(int32_t, OverrideKernelSizeLimitForSmallDispatch, -1, "-1: default, >=0: on XEHP+ changes the threshold for treating kernel as small during NULL LWS selection")
DECLARE_DEBUG_VARIABLE(int32_t, OverrideUseKmdWaitFunction, -1, "-1: default (L0: disabled), 0: disabled, 1: enabled. It uses only busy loop to wait or busy loop with KMD wait function, when KMD fallback is enabled")
DECLARE_DEBUG_VARIABLE(int32_t, MakeIndirectAllocationsResidentAsPack, -1, "-1: default, 0:disabled, 1: enabled. If enabled, driver handles all indirect allocations as one pack instead of making them resident individually.")
DECLARE_DEBUG_VARIABLE(int32_t, MakeEachAllocationResident, -1, "-1: default, 0: disabled, 1: bind every allocation at creation time, 2: bind all created allocations in flush")
DECLARE_DEBUG_VARIABLE(int32_t, DirectSubmissionDrmContext, -1, "Create special drm context: -1: default, when new residency model available, 0: disable, 1: enable")
DECLARE_DEBUG_VARIABLE(int32_t, DirectSubmissionOverrideBlitterSupport, -1, "Overrides default blitter support: -1: do not override, 0: disable engine support, 1: enable engine support with init start, 2: enable engine support without init start")
DECLARE_DEBUG_VARIABLE(int32_t, DirectSubmissionOverrideRenderSupport, -1, "Overrides default render support: -1: do not override, 0: disable engine support, 1: enable engine support with init start, 2: enable engine support without init start")
DECLARE_DEBUG_VARIABLE(int32_t, DirectSubmissionOverrideComputeSupport, -1, "Overrides default compute support: -1: do not override, 0: disable engine support, 1: enable engine support with init start, 2: enable engine support without init start")
DECLARE_DEBUG_VARIABLE(int32_t, EnableImplicitScaling, -1, "-1: default for API, 0: disable implicit scaling support on a given API, 1: enable implicit scaling support on a given API.")
DECLARE_DEBUG_VARIABLE(int32_t, SynchronizeWalkerInWparidMode, -1, "-1: default, 0: do not synchronize 1: synchronize all tiles prior to doing work distrubution")
DECLARE_DEBUG_VARIABLE(int32_t, SynchronizeWithSemaphores, -1, "-1: default (disabled), 1: Emit Semaphores waiting after Walker completion in WPARID mode 0: do not emit semaphores after Walker")
DECLARE_DEBUG_VARIABLE(int32_t, UseAtomicsForSelfCleanupSection, -1, "-1: default (disabled), 0: use store data op, 1: use atomic op")
DECLARE_DEBUG_VARIABLE(int32_t, ProgramWalkerPartitionSelfCleanup, -1, "-1: default (API dependent), 0: Do not program self cleanup, 1: program self cleanup")
DECLARE_DEBUG_VARIABLE(int32_t, EnableCacheFlushAfterWalker, -1, "-1: platform behavior, 0: disabled, 1: enabled. Adds dedicated cache flush command after WALKER command when surfaces used by kernel require to flush the cache")
DECLARE_DEBUG_VARIABLE(int32_t, EnableStatelessToStatefulBufferOffsetOpt, -1, "-1: dont override, 0: disable, 1: enable, Enables buffer-offset improvement of the stateless to stateful optimization")
DECLARE_DEBUG_VARIABLE(int32_t, LimitAmountOfReturnedDevices, 0, "0: default - disable, 1+: Driver will limit the number of devices returned from clGetDeviceIds to N.")
DECLARE_DEBUG_VARIABLE(int32_t, OverrideEnableQuickKmdSleep, -1, "-1: dont override, 0: disable, 1: enable. It works only when Kmd Notify is enabled.")
DECLARE_DEBUG_VARIABLE(int32_t, OverrideQuickKmdSleepDelayMicroseconds, -1, "-1: dont override, 0: infinite timeout, >0: timeout in microseconds")
DECLARE_DEBUG_VARIABLE(int32_t, OverrideEnableQuickKmdSleepForSporadicWaits, -1, "-1: dont override, 0: disable, 1: enable. It works only when QuickKmdSleep is enabled.")
DECLARE_DEBUG_VARIABLE(int32_t, OverrideDelayQuickKmdSleepForSporadicWaitsMicroseconds, -1, "-1: dont override, >0: timeout in microseconds")
DECLARE_DEBUG_VARIABLE(int32_t, OverrideEnableQuickKmdSleepForDirectSubmission, -1, "-1: dont override, 0: disable, 1: enable. It works only when QuickKmdSleep is enabled.")
DECLARE_DEBUG_VARIABLE(int32_t, OverrideDelayQuickKmdSleepForDirectSubmissionMicroseconds, -1, "-1: dont override, >0: timeout in microseconds")
DECLARE_DEBUG_VARIABLE(int32_t, PowerSavingMode, 0, "0: default 1: enable. Whenever driver waits on GPU and its not ready, put waiting thread to sleep and wait for notification.")
DECLARE_DEBUG_VARIABLE(int32_t, ForceFineGrainedSVMSupport, -1, "-1: default, 0: Do not report Fine Grained SVM capabilties 1: Report SVM Fine Grained capabilities if device supports SVM")
DECLARE_DEBUG_VARIABLE(int32_t, AlignLocalMemoryVaTo2MB, -1, "Allow 2MB pages for allocations with size>=2MB. On Linux it means aligned VA, on Windows it means aligned size. -1: default, 0: disabled, 1: enabled")
DECLARE_DEBUG_VARIABLE(int32_t, EnableUserFenceUseCtxId, -1, "-1: default (disabled), 0: disable, 1: enable : Use Context Id in Wait User Fence when waiting for completion tag")
DECLARE_DEBUG_VARIABLE(int32_t, OverrideNotifyEnableForTagUpdatePostSync, -1, "-1: default (usage determined by user fence wait call), 0: disable use of NotifyEnable flag, 1: enable use NotifyEnable flag")
DECLARE_DEBUG_VARIABLE(int32_t, ExperimentalSetWalkerPartitionCount, 0, "Experimental implementation: Set number of COMPUTE_WALKERs for a given Partition Type, 0 - do not set the feature.")
DECLARE_DEBUG_VARIABLE(int32_t, ExperimentalSetWalkerPartitionType, -1, "Experimental implementation: Set COMPUTE_WALKER Partition Type. Valid values for types from 1 to 3")
DECLARE_DEBUG_VARIABLE(int32_t, ExperimentalEnableCustomLocalMemoryAlignment, 0, "Align local memory allocations to a given value. Works only with allocations at least as big as the value. 0: no effect, 2097152: 2 megabytes, 1073741824: 1 gigabyte")
DECLARE_DEBUG_VARIABLE(int32_t, ForceOCL21FeaturesSupport, -1, "-1: default, 0: disable, 1:enable. Force support of OpenCL 2.0 and OpenCL 2.1 API features")
DECLARE_DEBUG_VARIABLE(int32_t, ForceSemaphoreDelayBetweenWaits, -1, "Specifies the minimum number of microseconds allowed for command streamer to wait before re-fetching the data. 0 - poll interval will be equal to the memory latency of the read completion")
DECLARE_DEBUG_VARIABLE(int32_t, ForceLocalMemoryAccessMode, -1, "-1: don't override, 0: default rules apply, 1: CPU can access local memory, 3: CPU never accesses local memory")
DECLARE_DEBUG_VARIABLE(int64_t, ForceSystemMemoryPlacement, 0, "0: default, >0: (bitmask) for given Graphics Allocation Type, force system memory placement")
DECLARE_DEBUG_VARIABLE(int64_t, ForceNonSystemMemoryPlacement, 0, "0: default, >0: (bitmask) for given Graphics Allocation Type, force non-system memory placement")
DECLARE_DEBUG_VARIABLE(int32_t, UpdateTaskCountFromWait, -1, " Do not update task count after each enqueue, but send update request while wait, -1: default(disabled), 0: disabled, 1: enabled on gpgpue engine with direct submission, 2: enabled on any direct submission, 3: enabled")
DECLARE_DEBUG_VARIABLE(int32_t, EnableTimestampWait, -1, "Wait using timestamps, -1: default(disabled), 0: disabled, 1: enabled where UpdateTaskCountFromWait enabled, 2: enabled on gpgpue engine with direct submission, 3: enabled on any direct submission, 4: enabled")
DECLARE_DEBUG_VARIABLE(int32_t, ForceHostPointerImport, -1, "-1: default, 0: disable, 1: enable, Forces the driver to import every host pointer coming into driver, WARNING this is not spec complaint.")
DECLARE_DEBUG_VARIABLE(bool, UseMaxSimdSizeToDeduceMaxWorkgroupSize, false, "With this flag on, max workgroup size is deduced using SIMD32 instead of SIMD8, this causes the max wkg size to be 4 times bigger")
DECLARE_DEBUG_VARIABLE(bool, ReturnRawGpuTimestamps, false, "Driver returns raw GPU tiemstamps instead of calculated ones.")
DECLARE_DEBUG_VARIABLE(bool, SkipFlushingEventsOnGetStatusCalls, false, "When set to 1, events are not causing internal flush when querying for CL_EVENT_COMMAND_EXECUTION_STATUS")
DECLARE_DEBUG_VARIABLE(int32_t, ProgramExtendedPipeControlPriorToNonPipelinedStateCommand, -1, "-1: default, 0: disable, 1: enable, Program additional extended version of PIPE CONTROL command before non pipelined state command")
DECLARE_DEBUG_VARIABLE(bool, ForceAllResourcesUncached, false, "When set, all memory operations for all resources are forced to UC. This overrides all caching-related debug variables and globally disables all caches")