1003 lines
37 KiB
C++
1003 lines
37 KiB
C++
// Copyright 2009-2021 Intel Corporation
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// SPDX-License-Identifier: Apache-2.0
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#pragma once
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#include "default.h"
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#include "device.h"
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#include "scene.h"
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#include "primref.h"
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#if defined(APPLE) && defined(__aarch64__)
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#include <mutex>
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#endif
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namespace embree
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{
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class FastAllocator
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{
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/*! maximum supported alignment */
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static const size_t maxAlignment = 64;
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/*! maximum allocation size */
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/* default settings */
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//static const size_t defaultBlockSize = 4096;
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#define maxAllocationSize size_t(2*1024*1024-maxAlignment)
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static const size_t MAX_THREAD_USED_BLOCK_SLOTS = 8;
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public:
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struct ThreadLocal2;
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enum AllocationType { ALIGNED_MALLOC, EMBREE_OS_MALLOC, SHARED, ANY_TYPE };
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/*! Per thread structure holding the current memory block. */
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struct __aligned(64) ThreadLocal
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{
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ALIGNED_CLASS_(64);
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public:
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/*! Constructor for usage with ThreadLocalData */
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__forceinline ThreadLocal (ThreadLocal2* parent)
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: parent(parent), ptr(nullptr), cur(0), end(0), allocBlockSize(0), bytesUsed(0), bytesWasted(0) {}
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/*! initialize allocator */
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void init(FastAllocator* alloc)
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{
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ptr = nullptr;
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cur = end = 0;
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bytesUsed = 0;
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bytesWasted = 0;
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allocBlockSize = 0;
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if (alloc) allocBlockSize = alloc->defaultBlockSize;
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}
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/* Allocate aligned memory from the threads memory block. */
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__forceinline void* malloc(FastAllocator* alloc, size_t bytes, size_t align = 16)
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{
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/* bind the thread local allocator to the proper FastAllocator*/
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parent->bind(alloc);
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assert(align <= maxAlignment);
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bytesUsed += bytes;
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/* try to allocate in local block */
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size_t ofs = (align - cur) & (align-1);
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cur += bytes + ofs;
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if (likely(cur <= end)) { bytesWasted += ofs; return &ptr[cur - bytes]; }
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cur -= bytes + ofs;
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/* if allocation is too large allocate with parent allocator */
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if (4*bytes > allocBlockSize) {
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return alloc->malloc(bytes,maxAlignment,false);
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}
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/* get new partial block if allocation failed */
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size_t blockSize = allocBlockSize;
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ptr = (char*) alloc->malloc(blockSize,maxAlignment,true);
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bytesWasted += end-cur;
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cur = 0; end = blockSize;
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/* retry allocation */
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ofs = (align - cur) & (align-1);
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cur += bytes + ofs;
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if (likely(cur <= end)) { bytesWasted += ofs; return &ptr[cur - bytes]; }
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cur -= bytes + ofs;
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/* get new full block if allocation failed */
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blockSize = allocBlockSize;
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ptr = (char*) alloc->malloc(blockSize,maxAlignment,false);
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bytesWasted += end-cur;
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cur = 0; end = blockSize;
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/* retry allocation */
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ofs = (align - cur) & (align-1);
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cur += bytes + ofs;
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if (likely(cur <= end)) { bytesWasted += ofs; return &ptr[cur - bytes]; }
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cur -= bytes + ofs;
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/* should never happen as large allocations get handled specially above */
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assert(false);
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return nullptr;
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}
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/*! returns amount of used bytes */
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__forceinline size_t getUsedBytes() const { return bytesUsed; }
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/*! returns amount of free bytes */
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__forceinline size_t getFreeBytes() const { return end-cur; }
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/*! returns amount of wasted bytes */
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__forceinline size_t getWastedBytes() const { return bytesWasted; }
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private:
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ThreadLocal2* parent;
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char* ptr; //!< pointer to memory block
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size_t cur; //!< current location of the allocator
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size_t end; //!< end of the memory block
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size_t allocBlockSize; //!< block size for allocations
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size_t bytesUsed; //!< number of total bytes allocated
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size_t bytesWasted; //!< number of bytes wasted
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};
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/*! Two thread local structures. */
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struct __aligned(64) ThreadLocal2
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{
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ALIGNED_CLASS_(64);
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public:
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__forceinline ThreadLocal2()
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: alloc(nullptr), alloc0(this), alloc1(this) {}
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/*! bind to fast allocator */
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__forceinline void bind(FastAllocator* alloc_i)
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{
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assert(alloc_i);
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if (alloc.load() == alloc_i) return;
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#if defined(APPLE) && defined(__aarch64__)
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std::scoped_lock lock(mutex);
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#else
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Lock<SpinLock> lock(mutex);
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#endif
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//if (alloc.load() == alloc_i) return; // not required as only one thread calls bind
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if (alloc.load()) {
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alloc.load()->bytesUsed += alloc0.getUsedBytes() + alloc1.getUsedBytes();
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alloc.load()->bytesFree += alloc0.getFreeBytes() + alloc1.getFreeBytes();
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alloc.load()->bytesWasted += alloc0.getWastedBytes() + alloc1.getWastedBytes();
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}
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alloc0.init(alloc_i);
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alloc1.init(alloc_i);
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alloc.store(alloc_i);
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alloc_i->join(this);
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}
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/*! unbind to fast allocator */
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void unbind(FastAllocator* alloc_i)
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{
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assert(alloc_i);
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if (alloc.load() != alloc_i) return;
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#if defined(APPLE) && defined(__aarch64__)
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std::scoped_lock lock(mutex);
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#else
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Lock<SpinLock> lock(mutex);
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#endif
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if (alloc.load() != alloc_i) return; // required as a different thread calls unbind
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alloc.load()->bytesUsed += alloc0.getUsedBytes() + alloc1.getUsedBytes();
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alloc.load()->bytesFree += alloc0.getFreeBytes() + alloc1.getFreeBytes();
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alloc.load()->bytesWasted += alloc0.getWastedBytes() + alloc1.getWastedBytes();
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alloc0.init(nullptr);
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alloc1.init(nullptr);
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alloc.store(nullptr);
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}
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public:
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#if defined(APPLE) && defined(__aarch64__)
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std::mutex mutex;
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#else
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SpinLock mutex; //!< required as unbind is called from other threads
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#endif
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std::atomic<FastAllocator*> alloc; //!< parent allocator
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ThreadLocal alloc0;
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ThreadLocal alloc1;
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};
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FastAllocator (Device* device, bool osAllocation)
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: device(device), slotMask(0), usedBlocks(nullptr), freeBlocks(nullptr), use_single_mode(false), defaultBlockSize(PAGE_SIZE), estimatedSize(0),
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growSize(PAGE_SIZE), maxGrowSize(maxAllocationSize), log2_grow_size_scale(0), bytesUsed(0), bytesFree(0), bytesWasted(0), atype(osAllocation ? EMBREE_OS_MALLOC : ALIGNED_MALLOC),
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primrefarray(device,0)
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{
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for (size_t i=0; i<MAX_THREAD_USED_BLOCK_SLOTS; i++)
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{
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threadUsedBlocks[i] = nullptr;
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threadBlocks[i] = nullptr;
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assert(!slotMutex[i].isLocked());
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}
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}
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~FastAllocator () {
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clear();
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}
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/*! returns the device attached to this allocator */
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Device* getDevice() {
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return device;
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}
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void share(mvector<PrimRef>& primrefarray_i) {
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primrefarray = std::move(primrefarray_i);
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}
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void unshare(mvector<PrimRef>& primrefarray_o)
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{
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reset(); // this removes blocks that are allocated inside the shared primref array
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primrefarray_o = std::move(primrefarray);
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}
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/*! returns first fast thread local allocator */
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__forceinline ThreadLocal* _threadLocal() {
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return &threadLocal2()->alloc0;
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}
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void setOSallocation(bool flag)
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{
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atype = flag ? EMBREE_OS_MALLOC : ALIGNED_MALLOC;
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}
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private:
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/*! returns both fast thread local allocators */
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__forceinline ThreadLocal2* threadLocal2()
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{
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ThreadLocal2* alloc = thread_local_allocator2;
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if (alloc == nullptr) {
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thread_local_allocator2 = alloc = new ThreadLocal2;
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#if defined(APPLE) && defined(__aarch64__)
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std::scoped_lock lock(s_thread_local_allocators_lock);
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#else
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Lock<SpinLock> lock(s_thread_local_allocators_lock);
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#endif
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s_thread_local_allocators.push_back(make_unique(alloc));
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}
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return alloc;
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}
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public:
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__forceinline void join(ThreadLocal2* alloc)
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{
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#if defined(APPLE) && defined(__aarch64__)
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std::scoped_lock lock(s_thread_local_allocators_lock);
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#else
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Lock<SpinLock> lock(thread_local_allocators_lock);
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#endif
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thread_local_allocators.push_back(alloc);
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}
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public:
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struct CachedAllocator
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{
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__forceinline CachedAllocator(void* ptr)
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: alloc(nullptr), talloc0(nullptr), talloc1(nullptr)
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{
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assert(ptr == nullptr);
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}
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__forceinline CachedAllocator(FastAllocator* alloc, ThreadLocal2* talloc)
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: alloc(alloc), talloc0(&talloc->alloc0), talloc1(alloc->use_single_mode ? &talloc->alloc0 : &talloc->alloc1) {}
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__forceinline operator bool () const {
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return alloc != nullptr;
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}
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__forceinline void* operator() (size_t bytes, size_t align = 16) const {
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return talloc0->malloc(alloc,bytes,align);
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}
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__forceinline void* malloc0 (size_t bytes, size_t align = 16) const {
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return talloc0->malloc(alloc,bytes,align);
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}
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__forceinline void* malloc1 (size_t bytes, size_t align = 16) const {
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return talloc1->malloc(alloc,bytes,align);
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}
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public:
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FastAllocator* alloc;
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ThreadLocal* talloc0;
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ThreadLocal* talloc1;
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};
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__forceinline CachedAllocator getCachedAllocator() {
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return CachedAllocator(this,threadLocal2());
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}
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/*! Builder interface to create thread local allocator */
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struct Create
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{
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public:
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__forceinline Create (FastAllocator* allocator) : allocator(allocator) {}
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__forceinline CachedAllocator operator() () const { return allocator->getCachedAllocator(); }
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private:
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FastAllocator* allocator;
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};
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void internal_fix_used_blocks()
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{
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/* move thread local blocks to global block list */
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for (size_t i = 0; i < MAX_THREAD_USED_BLOCK_SLOTS; i++)
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{
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while (threadBlocks[i].load() != nullptr) {
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Block* nextUsedBlock = threadBlocks[i].load()->next;
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threadBlocks[i].load()->next = usedBlocks.load();
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usedBlocks = threadBlocks[i].load();
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threadBlocks[i] = nextUsedBlock;
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}
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threadBlocks[i] = nullptr;
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}
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}
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static const size_t threadLocalAllocOverhead = 20; //! 20 means 5% parallel allocation overhead through unfilled thread local blocks
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static const size_t mainAllocOverheadStatic = 20; //! 20 means 5% allocation overhead through unfilled main alloc blocks
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static const size_t mainAllocOverheadDynamic = 8; //! 20 means 12.5% allocation overhead through unfilled main alloc blocks
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/* calculates a single threaded threshold for the builders such
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* that for small scenes the overhead of partly allocated blocks
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* per thread is low */
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size_t fixSingleThreadThreshold(size_t branchingFactor, size_t defaultThreshold, size_t numPrimitives, size_t bytesEstimated)
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{
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if (numPrimitives == 0 || bytesEstimated == 0)
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return defaultThreshold;
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/* calculate block size in bytes to fulfill threadLocalAllocOverhead constraint */
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const size_t single_mode_factor = use_single_mode ? 1 : 2;
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const size_t threadCount = TaskScheduler::threadCount();
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const size_t singleThreadBytes = single_mode_factor*threadLocalAllocOverhead*defaultBlockSize;
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/* if we do not have to limit number of threads use optimal thresdhold */
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if ( (bytesEstimated+(singleThreadBytes-1))/singleThreadBytes >= threadCount)
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return defaultThreshold;
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/* otherwise limit number of threads by calculating proper single thread threshold */
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else {
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double bytesPerPrimitive = double(bytesEstimated)/double(numPrimitives);
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return size_t(ceil(branchingFactor*singleThreadBytes/bytesPerPrimitive));
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}
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}
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__forceinline size_t alignSize(size_t i) {
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return (i+127)/128*128;
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}
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/*! initializes the grow size */
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__forceinline void initGrowSizeAndNumSlots(size_t bytesEstimated, bool fast)
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{
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/* we do not need single thread local allocator mode */
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use_single_mode = false;
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/* calculate growSize such that at most mainAllocationOverhead gets wasted when a block stays unused */
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size_t mainAllocOverhead = fast ? mainAllocOverheadDynamic : mainAllocOverheadStatic;
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size_t blockSize = alignSize(bytesEstimated/mainAllocOverhead);
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growSize = maxGrowSize = clamp(blockSize,size_t(1024),maxAllocationSize);
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/* if we reached the maxAllocationSize for growSize, we can
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* increase the number of allocation slots by still guaranteeing
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* the mainAllocationOverhead */
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slotMask = 0x0;
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if (MAX_THREAD_USED_BLOCK_SLOTS >= 2 && bytesEstimated > 2*mainAllocOverhead*growSize) slotMask = 0x1;
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if (MAX_THREAD_USED_BLOCK_SLOTS >= 4 && bytesEstimated > 4*mainAllocOverhead*growSize) slotMask = 0x3;
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if (MAX_THREAD_USED_BLOCK_SLOTS >= 8 && bytesEstimated > 8*mainAllocOverhead*growSize) slotMask = 0x7;
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if (MAX_THREAD_USED_BLOCK_SLOTS >= 8 && bytesEstimated > 16*mainAllocOverhead*growSize) { growSize *= 2; } /* if the overhead is tiny, double the growSize */
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/* set the thread local alloc block size */
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size_t defaultBlockSizeSwitch = PAGE_SIZE+maxAlignment;
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/* for sufficiently large scene we can increase the defaultBlockSize over the defaultBlockSizeSwitch size */
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#if 0 // we do not do this as a block size of 4160 if for some reason best for KNL
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const size_t threadCount = TaskScheduler::threadCount();
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const size_t single_mode_factor = use_single_mode ? 1 : 2;
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const size_t singleThreadBytes = single_mode_factor*threadLocalAllocOverhead*defaultBlockSizeSwitch;
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if (bytesEstimated+(singleThreadBytes-1))/singleThreadBytes >= threadCount)
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defaultBlockSize = min(max(defaultBlockSizeSwitch,bytesEstimated/(single_mode_factor*threadLocalAllocOverhead*threadCount)),growSize);
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/* otherwise we grow the defaultBlockSize up to defaultBlockSizeSwitch */
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else
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#endif
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defaultBlockSize = clamp(blockSize,size_t(1024),defaultBlockSizeSwitch);
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if (bytesEstimated == 0) {
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maxGrowSize = maxAllocationSize; // special mode if builder cannot estimate tree size
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defaultBlockSize = defaultBlockSizeSwitch;
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}
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log2_grow_size_scale = 0;
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if (device->alloc_main_block_size != 0) growSize = device->alloc_main_block_size;
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if (device->alloc_num_main_slots >= 1 ) slotMask = 0x0;
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if (device->alloc_num_main_slots >= 2 ) slotMask = 0x1;
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if (device->alloc_num_main_slots >= 4 ) slotMask = 0x3;
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if (device->alloc_num_main_slots >= 8 ) slotMask = 0x7;
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if (device->alloc_thread_block_size != 0) defaultBlockSize = device->alloc_thread_block_size;
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if (device->alloc_single_thread_alloc != -1) use_single_mode = device->alloc_single_thread_alloc;
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}
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/*! initializes the allocator */
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void init(size_t bytesAllocate, size_t bytesReserve, size_t bytesEstimate)
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{
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internal_fix_used_blocks();
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/* distribute the allocation to multiple thread block slots */
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slotMask = MAX_THREAD_USED_BLOCK_SLOTS-1; // FIXME: remove
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if (usedBlocks.load() || freeBlocks.load()) { reset(); return; }
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if (bytesReserve == 0) bytesReserve = bytesAllocate;
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freeBlocks = Block::create(device,bytesAllocate,bytesReserve,nullptr,atype);
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estimatedSize = bytesEstimate;
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initGrowSizeAndNumSlots(bytesEstimate,true);
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}
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/*! initializes the allocator */
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void init_estimate(size_t bytesEstimate)
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{
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internal_fix_used_blocks();
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if (usedBlocks.load() || freeBlocks.load()) { reset(); return; }
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/* single allocator mode ? */
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estimatedSize = bytesEstimate;
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//initGrowSizeAndNumSlots(bytesEstimate,false);
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initGrowSizeAndNumSlots(bytesEstimate,false);
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}
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/*! frees state not required after build */
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__forceinline void cleanup()
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{
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internal_fix_used_blocks();
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/* unbind all thread local allocators */
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for (auto alloc : thread_local_allocators) alloc->unbind(this);
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thread_local_allocators.clear();
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}
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/*! resets the allocator, memory blocks get reused */
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void reset ()
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{
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internal_fix_used_blocks();
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bytesUsed.store(0);
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bytesFree.store(0);
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bytesWasted.store(0);
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/* reset all used blocks and move them to begin of free block list */
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while (usedBlocks.load() != nullptr) {
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usedBlocks.load()->reset_block();
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Block* nextUsedBlock = usedBlocks.load()->next;
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usedBlocks.load()->next = freeBlocks.load();
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freeBlocks = usedBlocks.load();
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usedBlocks = nextUsedBlock;
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}
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/* remove all shared blocks as they are re-added during build */
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freeBlocks.store(Block::remove_shared_blocks(freeBlocks.load()));
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for (size_t i=0; i<MAX_THREAD_USED_BLOCK_SLOTS; i++)
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{
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threadUsedBlocks[i] = nullptr;
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threadBlocks[i] = nullptr;
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}
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/* unbind all thread local allocators */
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for (auto alloc : thread_local_allocators) alloc->unbind(this);
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thread_local_allocators.clear();
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}
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/*! frees all allocated memory */
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__forceinline void clear()
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{
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cleanup();
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bytesUsed.store(0);
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bytesFree.store(0);
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bytesWasted.store(0);
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if (usedBlocks.load() != nullptr) usedBlocks.load()->clear_list(device); usedBlocks = nullptr;
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if (freeBlocks.load() != nullptr) freeBlocks.load()->clear_list(device); freeBlocks = nullptr;
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for (size_t i=0; i<MAX_THREAD_USED_BLOCK_SLOTS; i++) {
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threadUsedBlocks[i] = nullptr;
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threadBlocks[i] = nullptr;
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}
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primrefarray.clear();
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}
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__forceinline size_t incGrowSizeScale()
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{
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size_t scale = log2_grow_size_scale.fetch_add(1)+1;
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return size_t(1) << min(size_t(16),scale);
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}
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/*! thread safe allocation of memory */
|
|
void* malloc(size_t& bytes, size_t align, bool partial)
|
|
{
|
|
assert(align <= maxAlignment);
|
|
|
|
while (true)
|
|
{
|
|
/* allocate using current block */
|
|
size_t threadID = TaskScheduler::threadID();
|
|
size_t slot = threadID & slotMask;
|
|
Block* myUsedBlocks = threadUsedBlocks[slot];
|
|
if (myUsedBlocks) {
|
|
void* ptr = myUsedBlocks->malloc(device,bytes,align,partial);
|
|
if (ptr) return ptr;
|
|
}
|
|
|
|
/* throw error if allocation is too large */
|
|
if (bytes > maxAllocationSize)
|
|
throw_RTCError(RTC_ERROR_UNKNOWN,"allocation is too large");
|
|
|
|
/* parallel block creation in case of no freeBlocks, avoids single global mutex */
|
|
if (likely(freeBlocks.load() == nullptr))
|
|
{
|
|
#if defined(APPLE) && defined(__aarch64__)
|
|
std::scoped_lock lock(slotMutex[slot]);
|
|
#else
|
|
Lock<SpinLock> lock(slotMutex[slot]);
|
|
#endif
|
|
if (myUsedBlocks == threadUsedBlocks[slot]) {
|
|
const size_t alignedBytes = (bytes+(align-1)) & ~(align-1);
|
|
const size_t allocSize = max(min(growSize,maxGrowSize),alignedBytes);
|
|
assert(allocSize >= bytes);
|
|
threadBlocks[slot] = threadUsedBlocks[slot] = Block::create(device,allocSize,allocSize,threadBlocks[slot],atype); // FIXME: a large allocation might throw away a block here!
|
|
// FIXME: a direct allocation should allocate inside the block here, and not in the next loop! a different thread could do some allocation and make the large allocation fail.
|
|
}
|
|
continue;
|
|
}
|
|
|
|
/* if this fails allocate new block */
|
|
{
|
|
#if defined(APPLE) && defined(__aarch64__)
|
|
std::scoped_lock lock(mutex);
|
|
#else
|
|
Lock<SpinLock> lock(mutex);
|
|
#endif
|
|
if (myUsedBlocks == threadUsedBlocks[slot])
|
|
{
|
|
if (freeBlocks.load() != nullptr) {
|
|
Block* nextFreeBlock = freeBlocks.load()->next;
|
|
freeBlocks.load()->next = usedBlocks;
|
|
__memory_barrier();
|
|
usedBlocks = freeBlocks.load();
|
|
threadUsedBlocks[slot] = freeBlocks.load();
|
|
freeBlocks = nextFreeBlock;
|
|
} else {
|
|
const size_t allocSize = min(growSize*incGrowSizeScale(),maxGrowSize);
|
|
usedBlocks = threadUsedBlocks[slot] = Block::create(device,allocSize,allocSize,usedBlocks,atype); // FIXME: a large allocation should get delivered directly, like above!
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/*! add new block */
|
|
void addBlock(void* ptr, ssize_t bytes)
|
|
{
|
|
#if defined(APPLE) && defined(__aarch64__)
|
|
std::scoped_lock lock(mutex);
|
|
#else
|
|
Lock<SpinLock> lock(mutex);
|
|
#endif
|
|
const size_t sizeof_Header = offsetof(Block,data[0]);
|
|
void* aptr = (void*) ((((size_t)ptr)+maxAlignment-1) & ~(maxAlignment-1));
|
|
size_t ofs = (size_t) aptr - (size_t) ptr;
|
|
bytes -= ofs;
|
|
if (bytes < 4096) return; // ignore empty or very small blocks
|
|
freeBlocks = new (aptr) Block(SHARED,bytes-sizeof_Header,bytes-sizeof_Header,freeBlocks,ofs);
|
|
}
|
|
|
|
/* special allocation only used from morton builder only a single time for each build */
|
|
void* specialAlloc(size_t bytes)
|
|
{
|
|
assert(freeBlocks.load() != nullptr && freeBlocks.load()->getBlockAllocatedBytes() >= bytes);
|
|
return freeBlocks.load()->ptr();
|
|
}
|
|
|
|
struct Statistics
|
|
{
|
|
Statistics ()
|
|
: bytesUsed(0), bytesFree(0), bytesWasted(0) {}
|
|
|
|
Statistics (size_t bytesUsed, size_t bytesFree, size_t bytesWasted)
|
|
: bytesUsed(bytesUsed), bytesFree(bytesFree), bytesWasted(bytesWasted) {}
|
|
|
|
Statistics (FastAllocator* alloc, AllocationType atype, bool huge_pages = false)
|
|
: bytesUsed(0), bytesFree(0), bytesWasted(0)
|
|
{
|
|
Block* usedBlocks = alloc->usedBlocks.load();
|
|
Block* freeBlocks = alloc->freeBlocks.load();
|
|
if (usedBlocks) bytesUsed += usedBlocks->getUsedBytes(atype,huge_pages);
|
|
if (freeBlocks) bytesFree += freeBlocks->getAllocatedBytes(atype,huge_pages);
|
|
if (usedBlocks) bytesFree += usedBlocks->getFreeBytes(atype,huge_pages);
|
|
if (freeBlocks) bytesWasted += freeBlocks->getWastedBytes(atype,huge_pages);
|
|
if (usedBlocks) bytesWasted += usedBlocks->getWastedBytes(atype,huge_pages);
|
|
}
|
|
|
|
std::string str(size_t numPrimitives)
|
|
{
|
|
std::stringstream str;
|
|
str.setf(std::ios::fixed, std::ios::floatfield);
|
|
str << "used = " << std::setw(7) << std::setprecision(3) << 1E-6f*bytesUsed << " MB, "
|
|
<< "free = " << std::setw(7) << std::setprecision(3) << 1E-6f*bytesFree << " MB, "
|
|
<< "wasted = " << std::setw(7) << std::setprecision(3) << 1E-6f*bytesWasted << " MB, "
|
|
<< "total = " << std::setw(7) << std::setprecision(3) << 1E-6f*bytesAllocatedTotal() << " MB, "
|
|
<< "#bytes/prim = " << std::setw(6) << std::setprecision(2) << double(bytesAllocatedTotal())/double(numPrimitives);
|
|
return str.str();
|
|
}
|
|
|
|
friend Statistics operator+ ( const Statistics& a, const Statistics& b)
|
|
{
|
|
return Statistics(a.bytesUsed+b.bytesUsed,
|
|
a.bytesFree+b.bytesFree,
|
|
a.bytesWasted+b.bytesWasted);
|
|
}
|
|
|
|
size_t bytesAllocatedTotal() const {
|
|
return bytesUsed + bytesFree + bytesWasted;
|
|
}
|
|
|
|
public:
|
|
size_t bytesUsed;
|
|
size_t bytesFree;
|
|
size_t bytesWasted;
|
|
};
|
|
|
|
Statistics getStatistics(AllocationType atype, bool huge_pages = false) {
|
|
return Statistics(this,atype,huge_pages);
|
|
}
|
|
|
|
size_t getUsedBytes() {
|
|
return bytesUsed;
|
|
}
|
|
|
|
size_t getWastedBytes() {
|
|
return bytesWasted;
|
|
}
|
|
|
|
struct AllStatistics
|
|
{
|
|
AllStatistics (FastAllocator* alloc)
|
|
|
|
: bytesUsed(alloc->bytesUsed),
|
|
bytesFree(alloc->bytesFree),
|
|
bytesWasted(alloc->bytesWasted),
|
|
stat_all(alloc,ANY_TYPE),
|
|
stat_malloc(alloc,ALIGNED_MALLOC),
|
|
stat_4K(alloc,EMBREE_OS_MALLOC,false),
|
|
stat_2M(alloc,EMBREE_OS_MALLOC,true),
|
|
stat_shared(alloc,SHARED) {}
|
|
|
|
AllStatistics (size_t bytesUsed,
|
|
size_t bytesFree,
|
|
size_t bytesWasted,
|
|
Statistics stat_all,
|
|
Statistics stat_malloc,
|
|
Statistics stat_4K,
|
|
Statistics stat_2M,
|
|
Statistics stat_shared)
|
|
|
|
: bytesUsed(bytesUsed),
|
|
bytesFree(bytesFree),
|
|
bytesWasted(bytesWasted),
|
|
stat_all(stat_all),
|
|
stat_malloc(stat_malloc),
|
|
stat_4K(stat_4K),
|
|
stat_2M(stat_2M),
|
|
stat_shared(stat_shared) {}
|
|
|
|
friend AllStatistics operator+ (const AllStatistics& a, const AllStatistics& b)
|
|
{
|
|
return AllStatistics(a.bytesUsed+b.bytesUsed,
|
|
a.bytesFree+b.bytesFree,
|
|
a.bytesWasted+b.bytesWasted,
|
|
a.stat_all + b.stat_all,
|
|
a.stat_malloc + b.stat_malloc,
|
|
a.stat_4K + b.stat_4K,
|
|
a.stat_2M + b.stat_2M,
|
|
a.stat_shared + b.stat_shared);
|
|
}
|
|
|
|
void print(size_t numPrimitives)
|
|
{
|
|
std::stringstream str0;
|
|
str0.setf(std::ios::fixed, std::ios::floatfield);
|
|
str0 << " alloc : "
|
|
<< "used = " << std::setw(7) << std::setprecision(3) << 1E-6f*bytesUsed << " MB, "
|
|
<< " "
|
|
<< "#bytes/prim = " << std::setw(6) << std::setprecision(2) << double(bytesUsed)/double(numPrimitives);
|
|
std::cout << str0.str() << std::endl;
|
|
|
|
std::stringstream str1;
|
|
str1.setf(std::ios::fixed, std::ios::floatfield);
|
|
str1 << " alloc : "
|
|
<< "used = " << std::setw(7) << std::setprecision(3) << 1E-6f*bytesUsed << " MB, "
|
|
<< "free = " << std::setw(7) << std::setprecision(3) << 1E-6f*bytesFree << " MB, "
|
|
<< "wasted = " << std::setw(7) << std::setprecision(3) << 1E-6f*bytesWasted << " MB, "
|
|
<< "total = " << std::setw(7) << std::setprecision(3) << 1E-6f*(bytesUsed+bytesFree+bytesWasted) << " MB, "
|
|
<< "#bytes/prim = " << std::setw(6) << std::setprecision(2) << double(bytesUsed+bytesFree+bytesWasted)/double(numPrimitives);
|
|
std::cout << str1.str() << std::endl;
|
|
|
|
std::cout << " total : " << stat_all.str(numPrimitives) << std::endl;
|
|
std::cout << " 4K : " << stat_4K.str(numPrimitives) << std::endl;
|
|
std::cout << " 2M : " << stat_2M.str(numPrimitives) << std::endl;
|
|
std::cout << " malloc: " << stat_malloc.str(numPrimitives) << std::endl;
|
|
std::cout << " shared: " << stat_shared.str(numPrimitives) << std::endl;
|
|
}
|
|
|
|
private:
|
|
size_t bytesUsed;
|
|
size_t bytesFree;
|
|
size_t bytesWasted;
|
|
Statistics stat_all;
|
|
Statistics stat_malloc;
|
|
Statistics stat_4K;
|
|
Statistics stat_2M;
|
|
Statistics stat_shared;
|
|
};
|
|
|
|
void print_blocks()
|
|
{
|
|
std::cout << " estimatedSize = " << estimatedSize << ", slotMask = " << slotMask << ", use_single_mode = " << use_single_mode << ", maxGrowSize = " << maxGrowSize << ", defaultBlockSize = " << defaultBlockSize << std::endl;
|
|
|
|
std::cout << " used blocks = ";
|
|
if (usedBlocks.load() != nullptr) usedBlocks.load()->print_list();
|
|
std::cout << "[END]" << std::endl;
|
|
|
|
std::cout << " free blocks = ";
|
|
if (freeBlocks.load() != nullptr) freeBlocks.load()->print_list();
|
|
std::cout << "[END]" << std::endl;
|
|
}
|
|
|
|
private:
|
|
|
|
struct Block
|
|
{
|
|
static Block* create(MemoryMonitorInterface* device, size_t bytesAllocate, size_t bytesReserve, Block* next, AllocationType atype)
|
|
{
|
|
/* We avoid using os_malloc for small blocks as this could
|
|
* cause a risk of fragmenting the virtual address space and
|
|
* reach the limit of vm.max_map_count = 65k under Linux. */
|
|
if (atype == EMBREE_OS_MALLOC && bytesAllocate < maxAllocationSize)
|
|
atype = ALIGNED_MALLOC;
|
|
|
|
/* we need to additionally allocate some header */
|
|
const size_t sizeof_Header = offsetof(Block,data[0]);
|
|
bytesAllocate = sizeof_Header+bytesAllocate;
|
|
bytesReserve = sizeof_Header+bytesReserve;
|
|
|
|
/* consume full 4k pages with using os_malloc */
|
|
if (atype == EMBREE_OS_MALLOC) {
|
|
bytesAllocate = ((bytesAllocate+PAGE_SIZE-1) & ~(PAGE_SIZE-1));
|
|
bytesReserve = ((bytesReserve +PAGE_SIZE-1) & ~(PAGE_SIZE-1));
|
|
}
|
|
|
|
/* either use alignedMalloc or os_malloc */
|
|
void *ptr = nullptr;
|
|
if (atype == ALIGNED_MALLOC)
|
|
{
|
|
/* special handling for default block size */
|
|
if (bytesAllocate == (2*PAGE_SIZE_2M))
|
|
{
|
|
const size_t alignment = maxAlignment;
|
|
if (device) device->memoryMonitor(bytesAllocate+alignment,false);
|
|
ptr = alignedMalloc(bytesAllocate,alignment);
|
|
|
|
/* give hint to transparently convert these pages to 2MB pages */
|
|
const size_t ptr_aligned_begin = ((size_t)ptr) & ~size_t(PAGE_SIZE_2M-1);
|
|
os_advise((void*)(ptr_aligned_begin + 0),PAGE_SIZE_2M); // may fail if no memory mapped before block
|
|
os_advise((void*)(ptr_aligned_begin + 1*PAGE_SIZE_2M),PAGE_SIZE_2M);
|
|
os_advise((void*)(ptr_aligned_begin + 2*PAGE_SIZE_2M),PAGE_SIZE_2M); // may fail if no memory mapped after block
|
|
|
|
return new (ptr) Block(ALIGNED_MALLOC,bytesAllocate-sizeof_Header,bytesAllocate-sizeof_Header,next,alignment);
|
|
}
|
|
else
|
|
{
|
|
const size_t alignment = maxAlignment;
|
|
if (device) device->memoryMonitor(bytesAllocate+alignment,false);
|
|
ptr = alignedMalloc(bytesAllocate,alignment);
|
|
return new (ptr) Block(ALIGNED_MALLOC,bytesAllocate-sizeof_Header,bytesAllocate-sizeof_Header,next,alignment);
|
|
}
|
|
}
|
|
else if (atype == EMBREE_OS_MALLOC)
|
|
{
|
|
if (device) device->memoryMonitor(bytesAllocate,false);
|
|
bool huge_pages; ptr = os_malloc(bytesReserve,huge_pages);
|
|
return new (ptr) Block(EMBREE_OS_MALLOC,bytesAllocate-sizeof_Header,bytesReserve-sizeof_Header,next,0,huge_pages);
|
|
}
|
|
else
|
|
assert(false);
|
|
|
|
return NULL;
|
|
}
|
|
|
|
Block (AllocationType atype, size_t bytesAllocate, size_t bytesReserve, Block* next, size_t wasted, bool huge_pages = false)
|
|
: cur(0), allocEnd(bytesAllocate), reserveEnd(bytesReserve), next(next), wasted(wasted), atype(atype), huge_pages(huge_pages)
|
|
{
|
|
assert((((size_t)&data[0]) & (maxAlignment-1)) == 0);
|
|
}
|
|
|
|
static Block* remove_shared_blocks(Block* head)
|
|
{
|
|
Block** prev_next = &head;
|
|
for (Block* block = head; block; block = block->next) {
|
|
if (block->atype == SHARED) *prev_next = block->next;
|
|
else prev_next = &block->next;
|
|
}
|
|
return head;
|
|
}
|
|
|
|
void clear_list(MemoryMonitorInterface* device)
|
|
{
|
|
Block* block = this;
|
|
while (block) {
|
|
Block* next = block->next;
|
|
block->clear_block(device);
|
|
block = next;
|
|
}
|
|
}
|
|
|
|
void clear_block (MemoryMonitorInterface* device)
|
|
{
|
|
const size_t sizeof_Header = offsetof(Block,data[0]);
|
|
const ssize_t sizeof_Alloced = wasted+sizeof_Header+getBlockAllocatedBytes();
|
|
|
|
if (atype == ALIGNED_MALLOC) {
|
|
alignedFree(this);
|
|
if (device) device->memoryMonitor(-sizeof_Alloced,true);
|
|
}
|
|
|
|
else if (atype == EMBREE_OS_MALLOC) {
|
|
size_t sizeof_This = sizeof_Header+reserveEnd;
|
|
os_free(this,sizeof_This,huge_pages);
|
|
if (device) device->memoryMonitor(-sizeof_Alloced,true);
|
|
}
|
|
|
|
else /* if (atype == SHARED) */ {
|
|
}
|
|
}
|
|
|
|
void* malloc(MemoryMonitorInterface* device, size_t& bytes_in, size_t align, bool partial)
|
|
{
|
|
size_t bytes = bytes_in;
|
|
assert(align <= maxAlignment);
|
|
bytes = (bytes+(align-1)) & ~(align-1);
|
|
if (unlikely(cur+bytes > reserveEnd && !partial)) return nullptr;
|
|
const size_t i = cur.fetch_add(bytes);
|
|
if (unlikely(i+bytes > reserveEnd && !partial)) return nullptr;
|
|
if (unlikely(i > reserveEnd)) return nullptr;
|
|
bytes_in = bytes = min(bytes,reserveEnd-i);
|
|
|
|
if (i+bytes > allocEnd) {
|
|
if (device) device->memoryMonitor(i+bytes-max(i,allocEnd),true);
|
|
}
|
|
return &data[i];
|
|
}
|
|
|
|
void* ptr() {
|
|
return &data[cur];
|
|
}
|
|
|
|
void reset_block ()
|
|
{
|
|
allocEnd = max(allocEnd,(size_t)cur);
|
|
cur = 0;
|
|
}
|
|
|
|
size_t getBlockUsedBytes() const {
|
|
return min(size_t(cur),reserveEnd);
|
|
}
|
|
|
|
size_t getBlockFreeBytes() const {
|
|
return getBlockAllocatedBytes() - getBlockUsedBytes();
|
|
}
|
|
|
|
size_t getBlockAllocatedBytes() const {
|
|
return min(max(allocEnd,size_t(cur)),reserveEnd);
|
|
}
|
|
|
|
size_t getBlockWastedBytes() const {
|
|
const size_t sizeof_Header = offsetof(Block,data[0]);
|
|
return sizeof_Header + wasted;
|
|
}
|
|
|
|
size_t getBlockReservedBytes() const {
|
|
return reserveEnd;
|
|
}
|
|
|
|
bool hasType(AllocationType atype_i, bool huge_pages_i) const
|
|
{
|
|
if (atype_i == ANY_TYPE ) return true;
|
|
else if (atype == EMBREE_OS_MALLOC) return atype_i == atype && huge_pages_i == huge_pages;
|
|
else return atype_i == atype;
|
|
}
|
|
|
|
size_t getUsedBytes(AllocationType atype, bool huge_pages = false) const {
|
|
size_t bytes = 0;
|
|
for (const Block* block = this; block; block = block->next) {
|
|
if (!block->hasType(atype,huge_pages)) continue;
|
|
bytes += block->getBlockUsedBytes();
|
|
}
|
|
return bytes;
|
|
}
|
|
|
|
size_t getFreeBytes(AllocationType atype, bool huge_pages = false) const {
|
|
size_t bytes = 0;
|
|
for (const Block* block = this; block; block = block->next) {
|
|
if (!block->hasType(atype,huge_pages)) continue;
|
|
bytes += block->getBlockFreeBytes();
|
|
}
|
|
return bytes;
|
|
}
|
|
|
|
size_t getWastedBytes(AllocationType atype, bool huge_pages = false) const {
|
|
size_t bytes = 0;
|
|
for (const Block* block = this; block; block = block->next) {
|
|
if (!block->hasType(atype,huge_pages)) continue;
|
|
bytes += block->getBlockWastedBytes();
|
|
}
|
|
return bytes;
|
|
}
|
|
|
|
size_t getAllocatedBytes(AllocationType atype, bool huge_pages = false) const {
|
|
size_t bytes = 0;
|
|
for (const Block* block = this; block; block = block->next) {
|
|
if (!block->hasType(atype,huge_pages)) continue;
|
|
bytes += block->getBlockAllocatedBytes();
|
|
}
|
|
return bytes;
|
|
}
|
|
|
|
void print_list ()
|
|
{
|
|
for (const Block* block = this; block; block = block->next)
|
|
block->print_block();
|
|
}
|
|
|
|
void print_block() const
|
|
{
|
|
if (atype == ALIGNED_MALLOC) std::cout << "A";
|
|
else if (atype == EMBREE_OS_MALLOC) std::cout << "O";
|
|
else if (atype == SHARED) std::cout << "S";
|
|
if (huge_pages) std::cout << "H";
|
|
size_t bytesUsed = getBlockUsedBytes();
|
|
size_t bytesFree = getBlockFreeBytes();
|
|
size_t bytesWasted = getBlockWastedBytes();
|
|
std::cout << "[" << bytesUsed << ", " << bytesFree << ", " << bytesWasted << "] ";
|
|
}
|
|
|
|
public:
|
|
std::atomic<size_t> cur; //!< current location of the allocator
|
|
std::atomic<size_t> allocEnd; //!< end of the allocated memory region
|
|
std::atomic<size_t> reserveEnd; //!< end of the reserved memory region
|
|
Block* next; //!< pointer to next block in list
|
|
size_t wasted; //!< amount of memory wasted through block alignment
|
|
AllocationType atype; //!< allocation mode of the block
|
|
bool huge_pages; //!< whether the block uses huge pages
|
|
char align[maxAlignment-5*sizeof(size_t)-sizeof(AllocationType)-sizeof(bool)]; //!< align data to maxAlignment
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char data[1]; //!< here starts memory to use for allocations
|
|
};
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|
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private:
|
|
Device* device;
|
|
SpinLock mutex;
|
|
size_t slotMask;
|
|
std::atomic<Block*> threadUsedBlocks[MAX_THREAD_USED_BLOCK_SLOTS];
|
|
std::atomic<Block*> usedBlocks;
|
|
std::atomic<Block*> freeBlocks;
|
|
|
|
std::atomic<Block*> threadBlocks[MAX_THREAD_USED_BLOCK_SLOTS];
|
|
#if defined(APPLE) && defined(__aarch64__)
|
|
std::mutex slotMutex[MAX_THREAD_USED_BLOCK_SLOTS];
|
|
#else
|
|
PaddedSpinLock slotMutex[MAX_THREAD_USED_BLOCK_SLOTS];
|
|
#endif
|
|
|
|
bool use_single_mode;
|
|
size_t defaultBlockSize;
|
|
size_t estimatedSize;
|
|
size_t growSize;
|
|
size_t maxGrowSize;
|
|
std::atomic<size_t> log2_grow_size_scale; //!< log2 of scaling factor for grow size // FIXME: remove
|
|
std::atomic<size_t> bytesUsed;
|
|
std::atomic<size_t> bytesFree;
|
|
std::atomic<size_t> bytesWasted;
|
|
static __thread ThreadLocal2* thread_local_allocator2;
|
|
static SpinLock s_thread_local_allocators_lock;
|
|
static std::vector<std::unique_ptr<ThreadLocal2>> s_thread_local_allocators;
|
|
#if defined(APPLE) && defined(__aarch64__)
|
|
std::mutex thread_local_allocators_lock;
|
|
#else
|
|
SpinLock thread_local_allocators_lock;
|
|
#endif
|
|
std::vector<ThreadLocal2*> thread_local_allocators;
|
|
AllocationType atype;
|
|
mvector<PrimRef> primrefarray; //!< primrefarray used to allocate nodes
|
|
};
|
|
}
|