src/gromacs/hardware/device_management_common.cpp

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  36 /*! \internal \file
  37  *  \brief Defines the implementations of device management functions that
  38  *         are common for CPU, CUDA and OpenCL.
  39  *
  40  *  \author Anca Hamuraru <anca@streamcomputing.eu>
  41  *  \author Dimitrios Karkoulis <dimitris.karkoulis@gmail.com>
  42  *  \author Teemu Virolainen <teemu@streamcomputing.eu>
  43  *  \author Mark Abraham <mark.j.abraham@gmail.com>
  44  *  \author Szilárd Páll <pall.szilard@gmail.com>
  45  *  \author Artem Zhmurov <zhmurov@gmail.com>
  46  *
  47  * \ingroup module_hardware
  48  */
  49 #include "gmxpre.h"
  50
  51 #include "gromacs/hardware/device_management.h"
  52 #include "gromacs/utility/fatalerror.h"
  53
  54 #include "device_information.h"
  55
  56 bool canPerformDeviceDetection(std::string* errorMessage)
  57 {
  58     if (c_binarySupportsGpus && getenv("GMX_DISABLE_GPU_DETECTION") == nullptr)
  59     {
  60         return isDeviceDetectionFunctional(errorMessage);
  61     }
  62     else
  63     {
  64         return false;
  65     }
  66 }
  67
  68 bool canComputeOnDevice()
  69 {
  70     bool canComputeOnDevice = false;
  71     if (canPerformDeviceDetection(nullptr))
  72     {
  73         std::vector<std::unique_ptr<DeviceInformation>> devInfos = findDevices();
  74         canComputeOnDevice = !getCompatibleDevices(devInfos).empty();
  75     }
  76     return canComputeOnDevice;
  77 }
  78
  79 std::vector<std::reference_wrapper<DeviceInformation>>
  80 getCompatibleDevices(const std::vector<std::unique_ptr<DeviceInformation>>& deviceInfoList)
  81 {
  82     // Possible minor over-allocation here, but not important for anything
  83     std::vector<std::reference_wrapper<DeviceInformation>> compatibleDeviceInfoList;
  84     compatibleDeviceInfoList.reserve(deviceInfoList.size());
  85     for (const auto& deviceInfo : deviceInfoList)
  86     {
  87         if (deviceInfo->status == DeviceStatus::Compatible)
  88         {
  89             compatibleDeviceInfoList.emplace_back(*deviceInfo);
  90         }
  91     }
  92     return compatibleDeviceInfoList;
  93 }
  94
  95 std::string getDeviceCompatibilityDescription(const std::vector<std::unique_ptr<DeviceInformation>>& deviceInfoList,
  96                                               int deviceId)
  97 {
  98     return (deviceId >= static_cast<int>(deviceInfoList.size())
  99                     ? c_deviceStateString[DeviceStatus::Nonexistent]
 100                     : c_deviceStateString[deviceInfoList[deviceId]->status]);
 101 }
 102
 103 void serializeDeviceInformations(const std::vector<std::unique_ptr<DeviceInformation>>& deviceInfoList,
 104                                  gmx::ISerializer*                                      serializer)
 105 {
 106     int numDevices = deviceInfoList.size();
 107     serializer->doInt(&numDevices);
 108     for (auto& deviceInfo : deviceInfoList)
 109     {
 110         serializer->doOpaque(reinterpret_cast<char*>(deviceInfo.get()), sizeof(DeviceInformation));
 111     }
 112 }
 113
 114 std::vector<std::unique_ptr<DeviceInformation>> deserializeDeviceInformations(gmx::ISerializer* serializer)
 115 {
 116     int numDevices = 0;
 117     serializer->doInt(&numDevices);
 118     std::vector<std::unique_ptr<DeviceInformation>> deviceInfoList(numDevices);
 119     for (int i = 0; i < numDevices; i++)
 120     {
 121         deviceInfoList[i] = std::make_unique<DeviceInformation>();
 122         serializer->doOpaque(reinterpret_cast<char*>(deviceInfoList[i].get()), sizeof(DeviceInformation));
 123     }
 124     return deviceInfoList;
 125 }