memory的atomic操作:所谓的atomic操作一般都遵循read-modify-write的流程,常见操作有Compare-And-Swap(CAS),Exchange,Add/Sub(或者加减一Inc/Dec?),Min/Max,And/Or/Xor等等。根据对象的不同,Generic用ATOM,global用ATOMG,shared用ATOMS。constant只读,所以没有atomic操作。local memory是私有的,没有线程竞争,所以也没...
atomic_transactions_per_request: 为每个原子和归约指令执行的全局内存原子和归约事务的平均数量 l2_atomic_throughput: 在 L2 缓存中接收到的原子和减少请求的内存读取吞吐量 l2_atomic_transactions: 在 L2 缓存中接收到的内存读取事务,用于原子请求和缩减请求 l2_tex_read_transactions: 在 L2 缓存中接收到的内存...
CUDA C支持多种原子操作。可参考include/device_atomic_functions.h文件。 原子函数(atomic function)对位于全局或共享存储器的一个32位或64位字执行read-modify-write的原子操作。也就是说,当多个线程同时访问全局或共享存储器的同一位置时,保证每个线程能够实现对共享可写数据的互斥操作:在一个操作完成之前,其它任何...
// the other thread blocks using global memory // atomic adds // same as before, since we have 256 threads, updating the // global histogram is just one write per thread! __syncthreads(); atomicAdd( &(histo[threadIdx.x]), temp[threadIdx.x] ); } int main( void ) { unsigned char...
Note that atomic functions (seeAtomic Functions) operating on mapped page-locked memory are not atomic from the point of view of the host or other devices. Also note that CUDA runtime requires that 1-byte, 2-byte, 4-byte, and 8-byte naturally aligned loads and stores to host memory init...
cuda.atomic.exch(mutex, 0, 0) @cuda.jit def add_one_mutex(x, mutex): lock(mutex) # Threads will stall here until they can atomically read 0 from # the mutex, at which point they will atomically write a 1 to it x[0] += 1 # Only a single thread will access this resource at ...
ATOMIC对RDMA操作的原子扩展。 SRQ_RECV通过共享RQ的方式,将原先的一个QP中一个SQ对应一个RQ的模式,变成了多个SQ共用一个RO的模式,减少了内存占用。 传输模式 RC可靠连接,类似于TCP UC不可靠连接,做了连接,但是没有做重传 UD不可靠数据报,类似于UDP
cuda.atomic.exch(mutex, 0, 0) @cuda.jit def add_one_mutex(x, mutex): lock(mutex) # Threads will stall here until they can atomically read 0 from # the mutex, at which point they will atomically write a 1 to it x[0] += 1 # Only a single thread will access this resource at ...
Defined when the CUDA frontend compiler supports device atomic compiler builtins. Refer to the CUDA C++ Programming Guide for more details. 2.2. NVCC Phases A compilation phase is a logical translation step that can be selected by command line options to nvcc. A single compilation phase can...
cuda.atomic.exch(mutex, 0, 0) @cuda.jit def add_one_mutex(x, mutex): lock(mutex) # Threads will stall here until they can atomically read 0 from # the mutex, at which point they will atomically write a 1 to it x[0] += 1 # Only a single thread will access this resource at ...