src/gromacs/gpu_utils/device_stream_ocl.cpp

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  35 /*! \internal \file
  36  *
  37  * \brief Implements the DeviceStream for OpenCL.
  38  *
  39  * \author Artem Zhmurov <zhmurov@gmail.com>
  40  *
  41  * \ingroup module_gpu_utils
  42  */
  43 #include "gmxpre.h"
  44
  45 #include "gromacs/gpu_utils/device_context.h"
  46 #include "gromacs/gpu_utils/device_stream.h"
  47 #include "gromacs/gpu_utils/gputraits_ocl.h"
  48 #include "gromacs/hardware/device_information.h"
  49 #include "gromacs/utility/exceptions.h"
  50 #include "gromacs/utility/gmxassert.h"
  51 #include "gromacs/utility/stringutil.h"
  52
  53 DeviceStream::DeviceStream()
  54 {
  55     stream_ = nullptr;
  56 }
  57
  58 void DeviceStream::init(const DeviceContext& deviceContext, DeviceStreamPriority /* priority */, const bool useTiming)
  59 {
  60     const DeviceInformation&    deviceInfo      = deviceContext.deviceInfo();
  61     cl_command_queue_properties queueProperties = useTiming ? CL_QUEUE_PROFILING_ENABLE : 0;
  62     cl_device_id                deviceId        = deviceInfo.oclDeviceId;
  63     cl_int                      clError;
  64     stream_ = clCreateCommandQueue(deviceContext.context(), deviceId, queueProperties, &clError);
  65     if (clError != CL_SUCCESS)
  66     {
  67         GMX_THROW(gmx::InternalError(gmx::formatString(
  68                 "Failed to create OpenCL command queue on GPU %s (OpenCL error ID %d).",
  69                 deviceInfo.device_name, clError)));
  70     }
  71 }
  72
  73 DeviceStream::~DeviceStream()
  74 {
  75     if (isValid())
  76     {
  77         cl_int clError = clReleaseCommandQueue(stream_);
  78         GMX_RELEASE_ASSERT(
  79                 clError == CL_SUCCESS,
  80                 gmx::formatString("Failed to release OpenCL stream (OpenCL error ID %d).", clError).c_str());
  81         stream_ = nullptr;
  82     }
  83 }
  84
  85 cl_command_queue DeviceStream::stream() const
  86 {
  87     return stream_;
  88 }
  89
  90 bool DeviceStream::isValid() const
  91 {
  92     return (stream_ != nullptr);
  93 }
  94
  95 void DeviceStream::synchronize() const
  96 {
  97     cl_int clError = clFinish(stream_);
  98     GMX_RELEASE_ASSERT(
  99             CL_SUCCESS == clError,
 100             gmx::formatString("Error caught during clFinish (OpenCL error ID %d).", clError).c_str());
 101 }