data() % 64 == 0; std::cout << "std is_aligned: " << is_aligned << std::endl; } } { std::cout << std::boolalpha; for ( int i = 0; i < 5; ++ i ) { std::vector<int, tbb::cache_aligned_allocator<int>> arr(n); bool is_aligned = (uintptr_t)arr.data() % ...
Btw, using STL vector with cache_aligned_allocator doesn't prevent false sharing of vector's elements. One could try to align the contained class itself: [cpp]struct __declspec(align(CACHE_LINE_SIZE)) MyStruct; // this won't compile std::vector x; // this won't compile too std::...
Solved: I am seeing the following code in the cache_aligned_allocator. Does TBB blindly use the cache line size of 128 or does it actually check at
Intel TBB with CMake build system. Contribute to wjakob/tbb development by creating an account on GitHub.
DefaultAllocator::allocMemory(262144*1024); template<size_t alignment> void* AlignedAllocator<alignment>::allocMemory(size_t count) { void *mem = rx_aligned_alloc(count, alignment); if (mem == nullptr) throw std::bad_alloc(); return mem; ...
The former demands the operating system to be aware of the cache partitions and somehow implement the assignment of partitions to tasks in its memory allocator (Gracioli and Fröhlich 2013). The latter is very useful, for instance, in hypervisor-based systems, where the hypervisor is ...
Because memory patterns applied by the allocator always set at least one of the two lowest order bits, the bottom two bits of any pointer member (other than char * or short *, which may not be 8-byte aligned on all platforms) are available to the client for marking cached objects that...
* If debugging is enabled, then the allocator can add additional * fields and/or padding to every object. buffer_size contains the total * object size including these internal fields, the following two * variables contain the offset to the user object and its size. ...
* If debugging is enabled, then the allocator can add additional * fields and/or padding to every object. buffer_size contains the total * object size including these internal fields, the following two * variables contain the offset to the user object and its size. ...
struct zone的pageset成员用于实现冷热页分配器(hot-n-cold allocator),在多处理器系统上每个CPU都有一个或多个高速缓存,各个CPU的管理必须是独立的 尽管内存域可能属于一个特定的NUMA结点,因而关联到某个特定的CPU,但其他CPU的高速缓存仍然可以包含该内存域中的页。实际上,每个处理器都可以访问系统中所有的页,尽管...