Peer Context Memory Access

cuCtxDisablePeerAccess cuCtxEnablePeerAccess cuDeviceCanAccessPeer

CUresult cuDeviceCanAccessPeer ( int *  canAccessPeer, CUdevice  dev, CUdevice  peerDev   ) Returns in *canAccessPeer a value of 1 if contexts on dev are capable of directly accessing memory from contexts on peerDev and 0 otherwise. If direct access of peerDev from dev is possible, then access may be enabled on two specific contexts by calling cuCtxEnablePeerAccess(). Parameters: canAccessPeer  - Returned access capability dev  - Device from which allocations on peerDev are to be directly accessed. peerDev  - Device on which the allocations to be directly accessed by dev reside. Returns: CUDA_SUCCESS, CUDA_ERROR_DEINITIALIZED, CUDA_ERROR_NOT_INITIALIZED, CUDA_ERROR_INVALID_DEVICE Note: Note that this function may also return error codes from previous, asynchronous launches. See also: cuCtxEnablePeerAccess, cuCtxDisablePeerAccess