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device.go
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device.go
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package cuda
/*
#include <cuda.h>
#include <assert.h>
int devattr_for_idx(int i, CUdevice_attribute * res) {
CUdevice_attribute attrs[] = {
CU_DEVICE_ATTRIBUTE_MAX_THREADS_PER_BLOCK,
CU_DEVICE_ATTRIBUTE_MAX_BLOCK_DIM_X,
CU_DEVICE_ATTRIBUTE_MAX_BLOCK_DIM_Y,
CU_DEVICE_ATTRIBUTE_MAX_BLOCK_DIM_Z,
CU_DEVICE_ATTRIBUTE_MAX_GRID_DIM_X,
CU_DEVICE_ATTRIBUTE_MAX_GRID_DIM_Y,
CU_DEVICE_ATTRIBUTE_MAX_GRID_DIM_Z,
CU_DEVICE_ATTRIBUTE_MAX_SHARED_MEMORY_PER_BLOCK,
CU_DEVICE_ATTRIBUTE_SHARED_MEMORY_PER_BLOCK,
CU_DEVICE_ATTRIBUTE_TOTAL_CONSTANT_MEMORY,
CU_DEVICE_ATTRIBUTE_WARP_SIZE,
CU_DEVICE_ATTRIBUTE_MAX_PITCH,
CU_DEVICE_ATTRIBUTE_MAX_REGISTERS_PER_BLOCK,
CU_DEVICE_ATTRIBUTE_REGISTERS_PER_BLOCK,
CU_DEVICE_ATTRIBUTE_CLOCK_RATE,
CU_DEVICE_ATTRIBUTE_TEXTURE_ALIGNMENT,
CU_DEVICE_ATTRIBUTE_GPU_OVERLAP,
CU_DEVICE_ATTRIBUTE_MULTIPROCESSOR_COUNT,
CU_DEVICE_ATTRIBUTE_KERNEL_EXEC_TIMEOUT,
CU_DEVICE_ATTRIBUTE_INTEGRATED,
CU_DEVICE_ATTRIBUTE_CAN_MAP_HOST_MEMORY,
CU_DEVICE_ATTRIBUTE_COMPUTE_MODE,
CU_DEVICE_ATTRIBUTE_MAXIMUM_TEXTURE1D_WIDTH,
CU_DEVICE_ATTRIBUTE_MAXIMUM_TEXTURE2D_WIDTH,
CU_DEVICE_ATTRIBUTE_MAXIMUM_TEXTURE2D_HEIGHT,
CU_DEVICE_ATTRIBUTE_MAXIMUM_TEXTURE3D_WIDTH,
CU_DEVICE_ATTRIBUTE_MAXIMUM_TEXTURE3D_HEIGHT,
CU_DEVICE_ATTRIBUTE_MAXIMUM_TEXTURE3D_DEPTH,
CU_DEVICE_ATTRIBUTE_MAXIMUM_TEXTURE2D_LAYERED_WIDTH,
CU_DEVICE_ATTRIBUTE_MAXIMUM_TEXTURE2D_LAYERED_HEIGHT,
CU_DEVICE_ATTRIBUTE_MAXIMUM_TEXTURE2D_LAYERED_LAYERS,
CU_DEVICE_ATTRIBUTE_MAXIMUM_TEXTURE2D_ARRAY_WIDTH,
CU_DEVICE_ATTRIBUTE_MAXIMUM_TEXTURE2D_ARRAY_HEIGHT,
CU_DEVICE_ATTRIBUTE_MAXIMUM_TEXTURE2D_ARRAY_NUMSLICES,
CU_DEVICE_ATTRIBUTE_SURFACE_ALIGNMENT,
CU_DEVICE_ATTRIBUTE_CONCURRENT_KERNELS,
CU_DEVICE_ATTRIBUTE_ECC_ENABLED,
CU_DEVICE_ATTRIBUTE_PCI_BUS_ID,
CU_DEVICE_ATTRIBUTE_PCI_DEVICE_ID,
CU_DEVICE_ATTRIBUTE_TCC_DRIVER,
CU_DEVICE_ATTRIBUTE_MEMORY_CLOCK_RATE,
CU_DEVICE_ATTRIBUTE_GLOBAL_MEMORY_BUS_WIDTH,
CU_DEVICE_ATTRIBUTE_L2_CACHE_SIZE,
CU_DEVICE_ATTRIBUTE_MAX_THREADS_PER_MULTIPROCESSOR,
CU_DEVICE_ATTRIBUTE_ASYNC_ENGINE_COUNT,
CU_DEVICE_ATTRIBUTE_UNIFIED_ADDRESSING,
CU_DEVICE_ATTRIBUTE_MAXIMUM_TEXTURE1D_LAYERED_WIDTH,
CU_DEVICE_ATTRIBUTE_MAXIMUM_TEXTURE1D_LAYERED_LAYERS,
CU_DEVICE_ATTRIBUTE_CAN_TEX2D_GATHER,
CU_DEVICE_ATTRIBUTE_MAXIMUM_TEXTURE2D_GATHER_WIDTH,
CU_DEVICE_ATTRIBUTE_MAXIMUM_TEXTURE2D_GATHER_HEIGHT,
CU_DEVICE_ATTRIBUTE_MAXIMUM_TEXTURE3D_WIDTH_ALTERNATE,
CU_DEVICE_ATTRIBUTE_MAXIMUM_TEXTURE3D_HEIGHT_ALTERNATE,
CU_DEVICE_ATTRIBUTE_MAXIMUM_TEXTURE3D_DEPTH_ALTERNATE,
CU_DEVICE_ATTRIBUTE_PCI_DOMAIN_ID,
CU_DEVICE_ATTRIBUTE_TEXTURE_PITCH_ALIGNMENT,
CU_DEVICE_ATTRIBUTE_MAXIMUM_TEXTURECUBEMAP_WIDTH,
CU_DEVICE_ATTRIBUTE_MAXIMUM_TEXTURECUBEMAP_LAYERED_WIDTH,
CU_DEVICE_ATTRIBUTE_MAXIMUM_TEXTURECUBEMAP_LAYERED_LAYERS,
CU_DEVICE_ATTRIBUTE_MAXIMUM_SURFACE1D_WIDTH,
CU_DEVICE_ATTRIBUTE_MAXIMUM_SURFACE2D_WIDTH,
CU_DEVICE_ATTRIBUTE_MAXIMUM_SURFACE2D_HEIGHT,
CU_DEVICE_ATTRIBUTE_MAXIMUM_SURFACE3D_WIDTH,
CU_DEVICE_ATTRIBUTE_MAXIMUM_SURFACE3D_HEIGHT,
CU_DEVICE_ATTRIBUTE_MAXIMUM_SURFACE3D_DEPTH,
CU_DEVICE_ATTRIBUTE_MAXIMUM_SURFACE1D_LAYERED_WIDTH,
CU_DEVICE_ATTRIBUTE_MAXIMUM_SURFACE1D_LAYERED_LAYERS,
CU_DEVICE_ATTRIBUTE_MAXIMUM_SURFACE2D_LAYERED_WIDTH,
CU_DEVICE_ATTRIBUTE_MAXIMUM_SURFACE2D_LAYERED_HEIGHT,
CU_DEVICE_ATTRIBUTE_MAXIMUM_SURFACE2D_LAYERED_LAYERS,
CU_DEVICE_ATTRIBUTE_MAXIMUM_SURFACECUBEMAP_WIDTH,
CU_DEVICE_ATTRIBUTE_MAXIMUM_SURFACECUBEMAP_LAYERED_WIDTH,
CU_DEVICE_ATTRIBUTE_MAXIMUM_SURFACECUBEMAP_LAYERED_LAYERS,
CU_DEVICE_ATTRIBUTE_MAXIMUM_TEXTURE1D_LINEAR_WIDTH,
CU_DEVICE_ATTRIBUTE_MAXIMUM_TEXTURE2D_LINEAR_WIDTH,
CU_DEVICE_ATTRIBUTE_MAXIMUM_TEXTURE2D_LINEAR_HEIGHT,
CU_DEVICE_ATTRIBUTE_MAXIMUM_TEXTURE2D_LINEAR_PITCH,
CU_DEVICE_ATTRIBUTE_MAXIMUM_TEXTURE2D_MIPMAPPED_WIDTH,
CU_DEVICE_ATTRIBUTE_MAXIMUM_TEXTURE2D_MIPMAPPED_HEIGHT,
CU_DEVICE_ATTRIBUTE_COMPUTE_CAPABILITY_MAJOR,
CU_DEVICE_ATTRIBUTE_COMPUTE_CAPABILITY_MINOR,
CU_DEVICE_ATTRIBUTE_MAXIMUM_TEXTURE1D_MIPMAPPED_WIDTH,
CU_DEVICE_ATTRIBUTE_STREAM_PRIORITIES_SUPPORTED,
CU_DEVICE_ATTRIBUTE_GLOBAL_L1_CACHE_SUPPORTED,
CU_DEVICE_ATTRIBUTE_LOCAL_L1_CACHE_SUPPORTED,
CU_DEVICE_ATTRIBUTE_MAX_SHARED_MEMORY_PER_MULTIPROCESSOR,
CU_DEVICE_ATTRIBUTE_MAX_REGISTERS_PER_MULTIPROCESSOR,
CU_DEVICE_ATTRIBUTE_MANAGED_MEMORY,
CU_DEVICE_ATTRIBUTE_MULTI_GPU_BOARD,
#ifdef CU_DEVICE_ATTRIBUTE_HOST_NATIVE_ATOMIC_SUPPORTED
CU_DEVICE_ATTRIBUTE_MULTI_GPU_BOARD_GROUP_ID,
CU_DEVICE_ATTRIBUTE_HOST_NATIVE_ATOMIC_SUPPORTED,
CU_DEVICE_ATTRIBUTE_SINGLE_TO_DOUBLE_PRECISION_PERF_RATIO,
CU_DEVICE_ATTRIBUTE_PAGEABLE_MEMORY_ACCESS,
CU_DEVICE_ATTRIBUTE_CONCURRENT_MANAGED_ACCESS,
CU_DEVICE_ATTRIBUTE_COMPUTE_PREEMPTION_SUPPORTED,
CU_DEVICE_ATTRIBUTE_CAN_USE_HOST_POINTER_FOR_REGISTERED_MEM
#else
CU_DEVICE_ATTRIBUTE_MULTI_GPU_BOARD_GROUP_ID
#endif
};
if (i <= 0 || i >= sizeof(attrs)/sizeof(CUdevice_attribute)) {
return 1;
}
*res = attrs[i];
return 0;
}
*/
import "C"
import (
"fmt"
"unsafe"
)
// DevAttr is a CUDA device attribute.
type DevAttr int
func (d DevAttr) cValue() (C.CUdevice_attribute, error) {
if d < 0 || d > DevAttrCanUseHostPointerForRegisteredMem {
panic("invalid DevAttr")
}
var res C.CUdevice_attribute
status := C.devattr_for_idx(C.int(d), &res)
if status == 0 {
return res, nil
} else {
return 0, fmt.Errorf("unsupported device attribute: %d", int(d))
}
}
// All supported device attributes.
const (
DevAttrMaxThreadsPerBlock DevAttr = iota
DevAttrMaxBlockDimX
DevAttrMaxBlockDimY
DevAttrMaxBlockDimZ
DevAttrMaxGridDimX
DevAttrMaxGridDimY
DevAttrMaxGridDimZ
DevAttrMaxSharedMemoryPerBlock
DevAttrSharedMemoryPerBlock
DevAttrTotalConstantMemory
DevAttrWarpSize
DevAttrMaxPitch
DevAttrMaxRegistersPerBlock
DevAttrRegistersPerBlock
DevAttrClockRate
DevAttrTextureAlignment
DevAttrGPUOverlap
DevAttrMultiprocessorCount
DevAttrKernelExecTimeout
DevAttrIntegrated
DevAttrCanMapHostMemory
DevAttrComputeMode
DevAttrMaximumTexture1DWidth
DevAttrMaximumTexture2DWidth
DevAttrMaximumTexture2DHeight
DevAttrMaximumTexture3DWidth
DevAttrMaximumTexture3DHeight
DevAttrMaximumTexture3DDepth
DevAttrMaximumTexture2DLayeredWidth
DevAttrMaximumTexture2DLayeredHeight
DevAttrMaximumTexture2DLayeredLayers
DevAttrMaximumTexture2DArrayWidth
DevAttrMaximumTexture2DArrayHeight
DevAttrMaximumTexture2DArrayNumslices
DevAttrSurfaceAlignment
DevAttrConcurrentKernels
DevAttrECCEnabled
DevAttrPCIBusID
DevAttrPCIDeviceID
DevAttrTCCDriver
DevAttrMemoryClockRate
DevAttrGlobalMemoryBusWidth
DevAttrL2CacheSize
DevAttrMaxThreadsPerMultiprocessor
DevAttrAsyncEngineCount
DevAttrUnifiedAddressing
DevAttrMaximumTexture1DLayeredWidth
DevAttrMaximumTexture1DLayeredLayers
DevAttrCanTex2DGather
DevAttrMaximumTexture2DGatherWidth
DevAttrMaximumTexture2DGatherHeight
DevAttrMaximumTexture3DWidthAlternate
DevAttrMaximumTexture3DHeightAlternate
DevAttrMaximumTexture3DDepthAlternate
DevAttrPCIDomainID
DevAttrTexturePitchAlignment
DevAttrMaximumTexturecubemapWidth
DevAttrMaximumTexturecubemapLayeredWidth
DevAttrMaximumTexturecubemapLayeredLayers
DevAttrMaximumSurface1DWidth
DevAttrMaximumSurface2DWidth
DevAttrMaximumSurface2DHeight
DevAttrMaximumSurface3DWidth
DevAttrMaximumSurface3DHeight
DevAttrMaximumSurface3DDepth
DevAttrMaximumSurface1DLayeredWidth
DevAttrMaximumSurface1DLayeredLayers
DevAttrMaximumSurface2DLayeredWidth
DevAttrMaximumSurface2DLayeredHeight
DevAttrMaximumSurface2DLayeredLayers
DevAttrMaximumSurfacecubemapWidth
DevAttrMaximumSurfacecubemapLayeredWidth
DevAttrMaximumSurfacecubemapLayeredLayers
DevAttrMaximumTexture1DLinearWidth
DevAttrMaximumTexture2DLinearWidth
DevAttrMaximumTexture2DLinearHeight
DevAttrMaximumTexture2DLinearPitch
DevAttrMaximumTexture2DMipmappedWidth
DevAttrMaximumTexture2DMipmappedHeight
DevAttrComputeCapabilityMajor
DevAttrComputeCapabilityMinor
DevAttrMaximumTexture1DMipmappedWidth
DevAttrStreamPrioritiesSupported
DevAttrGlobalL1CacheSupported
DevAttrLocalL1CacheSupported
DevAttrMaxSharedMemoryPerMultiprocessor
DevAttrMaxRegistersPerMultiprocessor
DevAttrManagedMemory
DevAttrMultiGPUBoard
DevAttrMultiGPUBoardGroupID
DevAttrHostNativeAtomicSupported
DevAttrSingleToDoublePrecisionPerfRatio
DevAttrPageableMemoryAccess
DevAttrConcurrentManagedAccess
DevAttrComputePreemptionSupported
DevAttrCanUseHostPointerForRegisteredMem
)
// Device contains a unique ID for a CUDA device.
type Device struct {
id C.CUdevice
}
// AllDevices lists the available CUDA devices.
//
// This needn't be called from a Context.
func AllDevices() ([]*Device, error) {
var count C.int
cuRes := C.cuDeviceGetCount(&count)
if err := newErrorDriver("cuDeviceGetCount", cuRes); err != nil {
return nil, err
}
var res []*Device
for i := C.int(0); i < count; i++ {
var dev C.CUdevice
cuRes = C.cuDeviceGet(&dev, i)
if err := newErrorDriver("cuDeviceGet", cuRes); err != nil {
return nil, err
}
res = append(res, &Device{id: dev})
}
return res, nil
}
// Name gets the device's identifier string.
//
// This needn't be called from a Context.
func (d *Device) Name() (string, error) {
res := (*C.char)(C.malloc(0x100))
defer C.free(unsafe.Pointer(res))
cuRes := C.cuDeviceGetName(res, 0xff, d.id)
if err := newErrorDriver("cuDeviceGetName", cuRes); err != nil {
return "", err
}
return C.GoString(res), nil
}
// Attr gets an attribute of the device.
//
// This needn't be called from a Context.
func (d *Device) Attr(attr DevAttr) (int, error) {
var res C.int
cAttr, err := attr.cValue()
if err != nil {
return 0, err
}
cuRes := C.cuDeviceGetAttribute(&res, cAttr, d.id)
if err := newErrorDriver("cuDeviceGetAttribute", cuRes); err != nil {
return 0, err
}
return int(res), nil
}
// TotalMem gets the device's total memory.
//
// This needn't be called from a Context.
func (d *Device) TotalMem() (uint64, error) {
var res C.size_t
cuRes := C.cuDeviceTotalMem(&res, d.id)
if err := newErrorDriver("cuDeviceTotalMem", cuRes); err != nil {
return 0, err
}
return uint64(res), nil
}