Enum CUMemHostAllocFlags

CUMemHostAllocFlags. All of these flags are orthogonal to one another: a developer may allocate memory that is portable, mapped and/or write-combined with no restrictions.

Namespace: ManagedCuda.BasicTypes

Assembly: ManagedCuda.dll

Syntax

[Flags]
public enum CUMemHostAllocFlags

Fields

Name	Description
DeviceMap	Maps the allocation into the CUDA address space. The device pointer to the memory may be obtained by calling cuMemHostGetDevicePointer_v2(ref CUdeviceptr, IntPtr, Int32). This feature is available only on GPUs with compute capability greater than or equal to 1.1.
None	No flags
Portable	The memory returned by this call will be considered as pinned memory by all CUDA contexts, not just the one that performed the allocation.
WriteCombined	Allocates the memory as write-combined (WC). WC memory can be transferred across the PCI Express bus more quickly on some system configurations, but cannot be read efficiently by most CPUs. WC memory is a good option for buffers that will be written by the CPU and read by the GPU via mapped pinned memory or host->device transfers. If set, host memory is allocated as write-combined - fast to write, faster to DMA, slow to read except via SSE4 streaming load instruction (MOVNTDQA).