cudaMallocHost: Allocates page-locked memory on the host

In duncantl/RCUDA: R Bindings for the CUDA Library for GPU Computing

Description

Allocates size bytes of host memory that is page-locked and accessible to the device. The driver tracks the virtual memory ranges allocated with this function and automatically accelerates calls to functions such as cudaMemcpy*(). Since the memory can be accessed directly by the device, it can be read or written with much higher bandwidth than pageable memory obtained with functions such as malloc(). Allocating excessive amounts of memory with cudaMallocHost() may degrade system performance, since it reduces the amount of memory available to the system for paging. As a result, this function is best used sparingly to allocate staging areas for data exchange between host and device.

Usage

cudaMallocHost(size)

Arguments

size	Requested allocation size in bytes

Value

ptr

References

http://docs.nvidia.com/cuda/cuda-driver-api/index.html

See Also

cudaMalloc cudaMallocPitch cudaMallocArray cudaMalloc3D cudaMalloc3DArray cudaHostAlloc cudaFree cudaFreeArray cudaMallocHost cudaFreeHost

duncantl/RCUDA documentation built on May 15, 2019, 5:26 p.m.