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Revert "feature: enable defer backing by default"

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This reverts commit 94a857b975.

Signed-off-by: Compute-Runtime-Validation <compute-runtime-validation@intel.com>
This commit is contained in:
Compute-Runtime-Validation
2025-12-03 01:04:41 +01:00
committed by Compute-Runtime-Automation
parent f60868c2bb
commit 936de45c71
6 changed files with 20 additions and 41 deletions
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2
shared/source/debug_settings/debug_variables_base.inl
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@@ -509,10 +509,10 @@ DECLARE_DEBUG_VARIABLE(bool, ForceSamplerLowFilteringPrecision, false, "Force Lo
DECLARE_DEBUG_VARIABLE(bool, EnablePrivateBO, false, "Enable PRELIM_I915_GEM_CREATE_EXT_VM_PRIVATE extension creating VM_PRIVATE BOs")
DECLARE_DEBUG_VARIABLE(bool, EnableAIL, true, "Enables AIL")
DECLARE_DEBUG_VARIABLE(bool, EnableReservingInSvmRange, true, "Enables reserving virtual memory in the SVM range")
DECLARE_DEBUG_VARIABLE(bool, EnableDeferBacking, false, "Enables defer backing on xe kmd")
DECLARE_DEBUG_VARIABLE(bool, DisableProgrammableMetricsSupport, false, "Disable Programmable Metrics support")
DECLARE_DEBUG_VARIABLE(bool, Enable512NumGrfs, true, "Enable support for 512 of GRFs per thread")
DECLARE_DEBUG_VARIABLE(int64_t, VmBindWaitUserFenceTimeout, -1, "-1: default, >0: time in ns for wait function timeout")
DECLARE_DEBUG_VARIABLE(int32_t, EnableDeferBacking, -1, "Enables defer backing on xe kmd, -1:default(enabled), 0:disable, 1:enable")
DECLARE_DEBUG_VARIABLE(int32_t, ForceRunAloneContext, -1, "Control creation of run-alone HW context, -1:default, 0:disable, 1:enable")
DECLARE_DEBUG_VARIABLE(int32_t, AddClGlSharing, -1, "Add cl-gl extension")
DECLARE_DEBUG_VARIABLE(int32_t, EnableBOMmapCreate, -1, "Create BOs using mmap, -1:default, 0:disable(GEM_USERPTR), 1:enable")

1
shared/source/os_interface/linux/drm_memory_manager.cpp
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@@ -1685,7 +1685,6 @@ void DrmMemoryManager::makeAllocationResidentIfNeeded(GraphicsAllocation *alloca
auto ioctlHelper = this->getDrm(rootDeviceIndex).getIoctlHelper();
if (ioctlHelper->makeResidentBeforeLockNeeded()) {
auto memoryOperationsInterface = executionEnvironment.rootDeviceEnvironments[rootDeviceIndex]->memoryOperationsInterface.get();
registerAllocationInOs(allocation);
[[maybe_unused]] auto ret = memoryOperationsInterface->makeResidentWithinOsContext(getDefaultOsContext(rootDeviceIndex), ArrayRef<NEO::GraphicsAllocation *>(&allocation, 1), false, false, true) == MemoryOperationsStatus::success;
DEBUG_BREAK_IF(!ret);
}

12
shared/source/os_interface/linux/xe/ioctl_helper_xe.cpp
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@@ -271,10 +271,6 @@ bool IoctlHelperXe::initialize() {
assignValue(tileIdToMediaGtId, gt.tile_id, gt.gt_id);
}
}
if (debugManager.flags.EnableDeferBacking.get() != -1) {
enableDeferBacking = debugManager.flags.EnableDeferBacking.get();
}
return true;
}
@@ -657,7 +653,7 @@ int IoctlHelperXe::createGemExt(const MemRegionsVec &memClassInstances, size_t a
create.placement = static_cast<uint32_t>(memoryInstances.to_ulong());
create.cpu_caching = this->getCpuCachingMode(isCoherent, isSysMemOnly);
if (enableDeferBacking) {
if (debugManager.flags.EnableDeferBacking.get()) {
create.flags |= DRM_XE_GEM_CREATE_FLAG_DEFER_BACKING;
}
@@ -1858,7 +1854,11 @@ bool IoctlHelperXe::isImmediateVmBindRequired() const {
}
bool IoctlHelperXe::makeResidentBeforeLockNeeded() const {
return enableDeferBacking;
auto makeResidentBeforeLockNeeded = false;
if (debugManager.flags.EnableDeferBacking.get()) {
makeResidentBeforeLockNeeded = true;
}
return makeResidentBeforeLockNeeded;
}
void IoctlHelperXe::insertEngineToContextParams(ContextParamEngines<> &contextParamEngines, uint32_t engineId, const EngineClassInstance *engineClassInstance, uint32_t tileId, bool hasVirtualEngines) {

1
shared/source/os_interface/linux/xe/ioctl_helper_xe.h
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@@ -233,7 +233,6 @@ class IoctlHelperXe : public IoctlHelper {
};
std::unique_ptr<EuDebugInterface> euDebugInterface;
bool enableDeferBacking = true;
};
template <typename... XeLogArgs>