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37 * \brief Implements the DeviceStream for CUDA.
39 * \author Artem Zhmurov <zhmurov@gmail.com>
41 * \ingroup module_gpu_utils
45 #include "device_stream.h"
47 #include "gromacs/gpu_utils/gputraits.h"
48 #include "gromacs/utility/exceptions.h"
49 #include "gromacs/utility/gmxassert.h"
50 #include "gromacs/utility/stringutil.h"
52 DeviceStream::DeviceStream()
57 void DeviceStream::init(const DeviceContext& /* deviceContext */,
58 DeviceStreamPriority priority,
59 const bool /* useTiming */)
63 if (priority == DeviceStreamPriority::Normal)
65 stat = cudaStreamCreate(&stream_);
66 if (stat != cudaSuccess)
68 GMX_THROW(gmx::InternalError(gmx::formatString(
69 "Could not create CUDA stream (CUDA error %d: %s).", stat, cudaGetErrorString(stat))));
72 else if (priority == DeviceStreamPriority::High)
74 // Note that the device we're running on does not have to
75 // support priorities, because we are querying the priority
76 // range, which in that case will be a single value.
78 stat = cudaDeviceGetStreamPriorityRange(nullptr, &highestPriority);
79 if (stat != cudaSuccess)
81 GMX_THROW(gmx::InternalError(gmx::formatString(
82 "Could not query CUDA stream priority range (CUDA error %d: %s).", stat,
83 cudaGetErrorString(stat))));
86 stat = cudaStreamCreateWithPriority(&stream_, cudaStreamDefault, highestPriority);
87 if (stat != cudaSuccess)
89 GMX_THROW(gmx::InternalError(gmx::formatString(
90 "Could not create CUDA stream with high priority (CUDA error %d: %s).", stat,
91 cudaGetErrorString(stat))));
96 DeviceStream::~DeviceStream()
100 cudaError_t stat = cudaStreamDestroy(stream_);
101 GMX_RELEASE_ASSERT(stat == cudaSuccess,
102 gmx::formatString("Failed to release CUDA stream (CUDA error %d: %s).",
103 stat, cudaGetErrorString(stat))
109 cudaStream_t DeviceStream::stream() const
114 bool DeviceStream::isValid() const
116 return (stream_ != nullptr);
119 void DeviceStream::synchronize() const
121 cudaError_t stat = cudaStreamSynchronize(stream_);
122 GMX_RELEASE_ASSERT(stat == cudaSuccess,
123 gmx::formatString("cudaStreamSynchronize failed (CUDA error %d: %s).", stat,
124 cudaGetErrorString(stat))