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40 #include "cudautils.cuh"
41 #include "gromacs/legacyheaders/pmalloc_cuda.h"
43 #include "gromacs/utility/cstringutil.h"
45 /*! Allocates nbytes of page-locked memory.
46 * This memory should always be freed using pfree (or with the page-locked
47 * free functions provied by the CUDA library).
49 void pmalloc(void **h_ptr, size_t nbytes)
53 int flag = cudaHostAllocDefault;
63 stat = cudaMallocHost(h_ptr, nbytes, flag);
64 sprintf(strbuf, "cudaMallocHost of size %d bytes failed", (int)nbytes);
65 CU_RET_ERR(stat, strbuf);
68 /*! Allocates nbytes of page-locked memory with write-combining.
69 * This memory should always be freed using pfree (or with the page-locked
70 * free functions provied by the CUDA library).
72 void pmalloc_wc(void **h_ptr, size_t nbytes)
76 int flag = cudaHostAllocDefault || cudaHostAllocWriteCombined;
86 stat = cudaMallocHost(h_ptr, nbytes, flag);
87 sprintf(strbuf, "cudaMallocHost of size %d bytes failed", (int)nbytes);
88 CU_RET_ERR(stat, strbuf);
91 /*! Frees page locked memory allocated with pmalloc.
92 * This function can safely be called also with a pointer to a page-locked
93 * memory allocated directly with CUDA API calls.
95 void pfree(void *h_ptr)
106 stat = cudaFreeHost(h_ptr);
107 CU_RET_ERR(stat, "cudaFreeHost failed");