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36 * \brief Function definitions for non-GPU builds
38 * \author Mark Abraham <mark.j.abraham@gmail.com>
42 #include "gpu_utils.h"
48 #include "gromacs/hardware/gpu_hw_info.h"
49 #include "gromacs/utility/arrayref.h"
50 #include "gromacs/utility/smalloc.h"
51 #include "gromacs/utility/stringutil.h"
54 int gpu_info_get_stat(const gmx_gpu_info_t & /*unused*/, int /*unused*/)
56 return egpuNonexistent;
60 void free_gpu_info(const gmx_gpu_info_t *gpu_info)
62 sfree(static_cast<void*>(gpu_info->gpu_dev)); //circumvent is_pod check in sfree
65 std::vector<int> getCompatibleGpus(const gmx_gpu_info_t &gpu_info)
67 // Possible minor over-allocation here, but not important for anything
68 std::vector<int> compatibleGpus;
69 compatibleGpus.reserve(gpu_info.n_dev);
70 for (int i = 0; i < gpu_info.n_dev; i++)
72 assert(gpu_info.gpu_dev);
73 if (gpu_info_get_stat(gpu_info, i) == egpuCompatible)
75 compatibleGpus.push_back(i);
78 return compatibleGpus;
81 const char *getGpuCompatibilityDescription(const gmx_gpu_info_t &gpu_info,
84 return (index >= gpu_info.n_dev ?
85 gpu_detect_res_str[egpuNonexistent] :
86 gpu_detect_res_str[gpu_info_get_stat(gpu_info, index)]);
88 /*! \brief Help build a descriptive message in \c error if there are
89 * \c errorReasons why nonbondeds on a GPU are not supported.
91 * \returns Whether the lack of errorReasons indicate there is support. */
93 addMessageIfNotSupported(gmx::ArrayRef <const std::string> errorReasons,
96 bool isSupported = errorReasons.empty();
97 if (!isSupported && error)
99 *error = "Nonbonded interactions cannot run on GPUs: ";
100 *error += joinStrings(errorReasons, "; ") + ".";
105 bool buildSupportsNonbondedOnGpu(std::string *error)
107 std::vector<std::string> errorReasons;
110 errorReasons.emplace_back("double precision");
112 if (GMX_GPU == GMX_GPU_NONE)
114 errorReasons.emplace_back("non-GPU build of GROMACS");
116 return addMessageIfNotSupported(errorReasons, error);