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41 #include "gmx_fatal.h"
43 #include "cudautils.cuh"
44 #include "pmalloc_cuda.h"
46 /*! Allocates nbytes of page-locked memory.
47 * This memory should always be freed using pfree (or with the page-locked
48 * free functions provied by the CUDA library).
50 void pmalloc(void **h_ptr, size_t nbytes)
54 int flag = cudaHostAllocDefault;
64 stat = cudaMallocHost(h_ptr, nbytes, flag);
65 sprintf(strbuf, "cudaMallocHost of size %d bytes failed", (int)nbytes);
66 CU_RET_ERR(stat, strbuf);
69 /*! Allocates nbytes of page-locked memory with write-combining.
70 * This memory should always be freed using pfree (or with the page-locked
71 * free functions provied by the CUDA library).
73 void pmalloc_wc(void **h_ptr, size_t nbytes)
77 int flag = cudaHostAllocDefault || cudaHostAllocWriteCombined;
87 stat = cudaMallocHost(h_ptr, nbytes, flag);
88 sprintf(strbuf, "cudaMallocHost of size %d bytes failed", (int)nbytes);
89 CU_RET_ERR(stat, strbuf);
92 /*! Frees page locked memory allocated with pmalloc.
93 * This function can safely be called also with a pointer to a page-locked
94 * memory allocated directly with CUDA API calls.
96 void pfree(void *h_ptr)
107 stat = cudaFreeHost(h_ptr);
108 CU_RET_ERR(stat, "cudaFreeHost failed");