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36 * \brief Defines helper functionality for device transfers for tests
37 * for GPU host allocator.
39 * \author Mark Abraham <mark.j.abraham@gmail.com>
43 #include "gromacs/gpu_utils/gmxopencl.h"
44 #include "gromacs/gpu_utils/gpu_utils.h"
45 #include "gromacs/gpu_utils/oclutils.h"
46 #include "gromacs/hardware/gpu_hw_info.h"
47 #include "gromacs/utility/arrayref.h"
48 #include "gromacs/utility/exceptions.h"
49 #include "gromacs/utility/gmxassert.h"
50 #include "gromacs/utility/stringutil.h"
52 #include "devicetransfers.h"
59 /*! \brief Help give useful diagnostics about error \c status while doing \c message.
61 * \throws InternalError If status indicates failure, supplying
62 * descriptive text from \c message. */
63 void throwUponFailure(cl_int status, const char *message)
65 if (status != CL_SUCCESS)
67 GMX_THROW(InternalError(formatString("Failure while %s, error was %s", message, ocl_get_error_string(status).c_str())));
73 void doDeviceTransfers(const gmx_gpu_info_t &gpuInfo,
74 ArrayRef<const char> input,
75 ArrayRef<char> output)
77 GMX_RELEASE_ASSERT(input.size() == output.size(), "Input and output must have matching size");
78 const auto compatibleGpus = getCompatibleGpus(gpuInfo);
79 if (compatibleGpus.empty())
81 std::copy(input.begin(), input.end(), output.begin());
86 const auto *device = getDeviceInfo(gpuInfo, compatibleGpus[0]);
87 cl_context_properties properties[] = {
89 reinterpret_cast<cl_context_properties>(device->ocl_gpu_id.ocl_platform_id),
92 // Give uncrustify more space
94 auto deviceId = device->ocl_gpu_id.ocl_device_id;
95 auto context = clCreateContext(properties, 1, &deviceId, nullptr, nullptr, &status);
96 throwUponFailure(status, "creating context");
97 auto commandQueue = clCreateCommandQueue(context, deviceId, 0, &status);
98 throwUponFailure(status, "creating command queue");
100 auto devicePointer = clCreateBuffer(context, CL_MEM_READ_WRITE, input.size(), nullptr, &status);
101 throwUponFailure(status, "creating buffer");
103 status = clEnqueueWriteBuffer(commandQueue, devicePointer, CL_TRUE, 0, input.size(), input.data(), 0, nullptr, nullptr);
104 throwUponFailure(status, "transferring host to device");
105 status = clEnqueueReadBuffer(commandQueue, devicePointer, CL_TRUE, 0, output.size(), output.data(), 0, nullptr, nullptr);
106 throwUponFailure(status, "transferring device to host");
108 status = clReleaseMemObject(devicePointer);
109 throwUponFailure(status, "releasing buffer");
110 status = clReleaseContext(context);
111 throwUponFailure(status, "releasing context");