NVIDIA® Nsight™ Development Platform, Visual Studio Edition 4.6 User Guide
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Buffers are memory on the CUDA device or in system memory. Bandwidth to device memory is higher than bandwidth to system memory, but the caches and shared memory provide much lower latency and higher bandwidth. Thus, the most efficient way to access device and system memory is to avoid re-accessing the same buffer data multiple times if it can be stored in shared memory or cache. Since the initial accesses to device and system memory must be done, they are often a performance bottleneck, so it is important to monitor bandwidth to buffers.
NVIDIA® Nsight™ Development Platform, Visual Studio Edition User Guide Rev. 4.6.150311 ©2009-2015. NVIDIA Corporation. All Rights Reserved.