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/*
* Copyright (C) 2026 Intel Corporation
*
* SPDX-License-Identifier: MIT
*
*/
#include "shared/source/utilities/command_buffer_pool_allocator.h"
#include "shared/source/device/device.h"
#include "shared/source/helpers/aligned_memory.h"
#include "shared/source/memory_manager/allocation_properties.h"
#include "shared/source/memory_manager/graphics_allocation.h"
#include "shared/source/memory_manager/memory_manager.h"
#include "shared/source/utilities/buffer_pool_allocator.inl"
namespace NEO {
CommandBufferPool::CommandBufferPool(Device *device, size_t storageSize)
: BaseType(device->getMemoryManager(), nullptr), device(device) {
DEBUG_BREAK_IF(device->getProductHelper().is2MBLocalMemAlignmentEnabled() &&
!isAligned(storageSize, MemoryConstants::pageSize2M));
AllocationProperties allocProperties = {device->getRootDeviceIndex(),
true /* allocateMemory*/,
storageSize,
NEO::AllocationType::commandBuffer,
(device->getNumGenericSubDevices() > 1u) /* multiOsContextCapable */,
false,
device->getDeviceBitfield()};
auto graphicsAllocation = memoryManager->allocateGraphicsMemoryWithProperties(allocProperties);
this->chunkAllocator.reset(new NEO::HeapAllocator(params.startingOffset,
graphicsAllocation ? graphicsAllocation->getUnderlyingBufferSize() : 0u,
MemoryConstants::pageSize,
0u));
this->mainStorage.reset(graphicsAllocation);
this->mtx = std::make_unique<std::mutex>();
this->stackVec.push_back(graphicsAllocation);
}
CommandBufferPool::CommandBufferPool(CommandBufferPool &&pool) noexcept : BaseType(std::move(pool)) {
mtx.reset(pool.mtx.release());
this->stackVec = std::move(pool.stackVec);
this->device = pool.device;
}
CommandBufferPool::~CommandBufferPool() {
if (mainStorage) {
device->getMemoryManager()->freeGraphicsMemory(mainStorage.release());
}
}
GraphicsAllocation *CommandBufferPool::allocateCommandBuffer(size_t requestedSize) const {
auto offset = static_cast<size_t>(this->chunkAllocator->allocate(requestedSize));
if (offset == 0) {
return nullptr;
}
return this->mainStorage->createView(offset - params.startingOffset, requestedSize);
}
const StackVec<NEO::GraphicsAllocation *, 1> &CommandBufferPool::getAllocationsVector() {
return stackVec;
}
CommandBufferPoolAllocator::CommandBufferPoolAllocator(Device *device) : device(device) {}
GraphicsAllocation *CommandBufferPoolAllocator::allocateCommandBuffer(size_t size) {
if (size > maxRequestedSize) {
return nullptr;
}
std::lock_guard<std::mutex> lock(allocatorMtx);
if (this->bufferPools.empty()) {
addNewBufferPool(CommandBufferPool(device, alignToPoolSize(defaultPoolSize)));
}
auto allocFromPool = tryAllocate(size);
if (allocFromPool != nullptr) {
return allocFromPool;
}
this->drain();
allocFromPool = tryAllocate(size);
if (allocFromPool != nullptr) {
return allocFromPool;
}
addNewBufferPool(CommandBufferPool(device, alignToPoolSize(defaultPoolSize)));
return tryAllocate(size);
}
void CommandBufferPoolAllocator::freeCommandBuffer(GraphicsAllocation *allocation) {
if (!allocation || !allocation->isView()) {
return;
}
std::unique_lock lock(allocatorMtx);
tryFreeFromPoolBuffer(allocation->getParentAllocation(), allocation->getOffsetInParent(), allocation->getUnderlyingBufferSize());
delete allocation;
}
GraphicsAllocation *CommandBufferPoolAllocator::tryAllocate(size_t size) {
for (auto &pool : this->bufferPools) {
if (auto allocation = pool.allocateCommandBuffer(size)) {
return allocation;
}
}
return nullptr;
}
size_t CommandBufferPoolAllocator::alignToPoolSize(size_t size) const {
return alignUp(size, poolAlignment);
}
} // namespace NEO
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