import functools import operator import os import subprocess import triton import re from pathlib import Path from triton import knobs from triton.runtime.build import compile_module_from_src from triton.runtime import _allocation from triton.backends.compiler import GPUTarget from triton.backends.driver import GPUDriver dirname = os.path.dirname(os.path.realpath(__file__)) include_dirs = [os.path.join(dirname, "include")] libdevice_dir = os.path.join(dirname, "lib") libraries = ['cuda'] @functools.lru_cache() def libcuda_dirs(): if env_libcuda_path := knobs.nvidia.libcuda_path: return [env_libcuda_path] libs = subprocess.check_output(["/sbin/ldconfig", "-p"]).decode() # each line looks like the following: # libcuda.so.1 (libc6,x86-64) => /lib/x86_64-linux-gnu/libcuda.so.1 locs = [line.split()[-1] for line in libs.splitlines() if "libcuda.so.1" in line] dirs = [os.path.dirname(loc) for loc in locs] env_ld_library_path = os.getenv("LD_LIBRARY_PATH") if env_ld_library_path and not dirs: dirs = [dir for dir in env_ld_library_path.split(":") if os.path.exists(os.path.join(dir, "libcuda.so.1"))] msg = 'libcuda.so cannot found!\n' if locs: msg += 'Possible files are located at %s.' % str(locs) msg += 'Please create a symlink of libcuda.so to any of the files.' else: msg += 'Please make sure GPU is set up and then run "/sbin/ldconfig"' msg += ' (requires sudo) to refresh the linker cache.' assert any(os.path.exists(os.path.join(path, 'libcuda.so.1')) for path in dirs), msg return dirs @functools.lru_cache() def library_dirs(): return [libdevice_dir, *libcuda_dirs()] # ------------------------ # Utils # ------------------------ class CudaUtils(object): def __new__(cls): if not hasattr(cls, "instance"): cls.instance = super(CudaUtils, cls).__new__(cls) return cls.instance def __init__(self): mod = compile_module_from_src( src=Path(os.path.join(dirname, "driver.c")).read_text(), name="cuda_utils", library_dirs=library_dirs(), include_dirs=include_dirs, libraries=libraries, ) self.load_binary = mod.load_binary self.get_device_properties = mod.get_device_properties self.cuOccupancyMaxActiveClusters = mod.cuOccupancyMaxActiveClusters self.set_printf_fifo_size = mod.set_printf_fifo_size self.fill_tma_descriptor = mod.fill_tma_descriptor # ------------------------ # Launcher # ------------------------ def ty_to_cpp(ty): if ty[0] == '*': return "CUdeviceptr" if ty.startswith("tensordesc"): return "CUtensorMap" return { "i1": "int32_t", "i8": "int8_t", "i16": "int16_t", "i32": "int32_t", "i64": "int64_t", "u1": "uint32_t", "u8": "uint8_t", "u16": "uint16_t", "u32": "uint32_t", "u64": "uint64_t", "fp16": "double", "bf16": "double", "fp32": "double", "f32": "double", "fp64": "double", "nvTmaDesc": "CUtensorMap", }[ty] FLOAT_STORAGE_TYPE = { "fp16": "uint16_t", "bf16": "uint16_t", "fp32": "uint32_t", "f32": "uint32_t", "fp64": "uint64_t", } FLOAT_PACK_FUNCTION = { "fp16": "pack_fp16", "bf16": "pack_bf16", "fp32": "pack_fp32", "f32": "pack_fp32", "fp64": "pack_fp64", } _BASE_ARGS_FORMAT = "iiiKKppOOOOO" def make_launcher(constants, signature, tensordesc_meta): def _expand_signature(signature): output = [] tensordesc_idx = 0 # Expand tensor descriptor arguments into either nvTmaDesc, shape and # strides, or base pointer, shape and strides depending on whether the # kernel was lowered to use the nvTmaDesc or not. for sig in signature: if isinstance(sig, str) and sig.startswith("tensordesc"): meta = tensordesc_meta[tensordesc_idx] if tensordesc_meta else None tensordesc_idx += 1 match = re.match("tensordesc<([^[>]*)\\[([^]]*)\\]", sig) dtype = match.group(1) shape = match.group(2) ndim = shape.count(",") + 1 if meta is None: output.append("*" + dtype) # Currently the host side tensor descriptors get passed in as a # tensor desc, shape, and strides. We have no way to use these # shape and strides when processing tensor descriptors which is # why we provide our own decomposition above. Sadly this means # we have to pass the shape and strides twice. for _ in range(2 * ndim): output.append("i64") else: output.append("nvTmaDesc") for _ in range(ndim): output.append("i32") for _ in range(ndim): output.append("i64") else: output.append(sig) assert not tensordesc_meta or tensordesc_idx == len(tensordesc_meta) return output def _flatten_signature(sig, output): # Flatten tuples if isinstance(sig, tuple): for x in sig: _flatten_signature(x, output) else: output.append(sig) def _extracted_type(ty): if isinstance(ty, tuple): val = ','.join(map(_extracted_type, ty)) return f"[{val}]" if ty[0] == '*': return "PyObject*" if ty in ("constexpr", "nvTmaDesc"): return "PyObject*" return ty_to_cpp(ty) def format_of(ty): if isinstance(ty, tuple): val = ''.join(map(format_of, ty)) return f"({val})" if ty[0] == '*': return "O" if ty in ("constexpr", "nvTmaDesc"): return "O" if ty.startswith("tensordesc"): return "O" return { "double": "d", "long": "l", "int8_t": "b", "int16_t": "h", "int32_t": "i", "int64_t": "L", "uint8_t": "B", "uint16_t": "H", "uint32_t": "I", "uint64_t": "K", }[ty_to_cpp(ty)] expand_signature = _expand_signature(signature.values()) signature = {i: s for i, s in enumerate(expand_signature)} args_format = ''.join([format_of(ty) for ty in signature.values()]) format = _BASE_ARGS_FORMAT + args_format flat_signature = [] for sig in signature.values(): _flatten_signature(sig, flat_signature) signature = {i: s for i, s in enumerate(flat_signature)} args_list = ', ' + ', '.join(f"&_arg{i}" for i, ty in signature.items()) if len(signature) > 0 else '' # Record the end of regular arguments; # subsequent arguments are architecture-specific descriptors, such as tensor descriptors for CUDA. arg_decl_list = [] for i, ty in signature.items(): if ty == "constexpr": continue if ty in FLOAT_STORAGE_TYPE: arg_decl_list.append(f"{FLOAT_STORAGE_TYPE[ty]} arg{i}") else: arg_decl_list.append(f"{ty_to_cpp(ty)} arg{i}") arg_decls = ', '.join(arg_decl_list) internal_args_list = [] for i, ty in signature.items(): if ty[0] == "*": internal_args_list.append(f"ptr_info{i}.dev_ptr") elif ty in FLOAT_STORAGE_TYPE: internal_args_list.append(f"_arg{i}_storage") elif ty == "nvTmaDesc": # Note: we have to dereference the pointer internal_args_list.append(f"*tma_ptr{i}") elif ty != "constexpr": internal_args_list.append(f"_arg{i}") params = range(len(signature)) # generate glue code newline = '\n ' ptr_decls = [ f"DevicePtrInfo ptr_info{i} = getPointer(_arg{i}, {i}); if (!ptr_info{i}.valid) return NULL;" for i, ty in signature.items() if ty[0] == "*" ] tma_decls = [ f"CUtensorMap* tma_ptr{i} = getTmaDesc(_arg{i}); if (!tma_ptr{i}) return NULL;" for i, ty in signature.items() if ty == "nvTmaDesc" ] float_storage_decls = [ f"{FLOAT_STORAGE_TYPE[ty]} _arg{i}_storage = {FLOAT_PACK_FUNCTION[ty]}(_arg{i});" for i, ty in signature.items() if ty in FLOAT_STORAGE_TYPE ] params = [f"&arg{i}" for i, ty in signature.items() if ty != "constexpr"] params.append("&global_scratch") src = f""" #include \"cuda.h\" #include #include #include static inline void gpuAssert(CUresult code, const char *file, int line) {{ if (code != CUDA_SUCCESS) {{ const char* prefix = "Triton Error [CUDA]: "; const char* str; cuGetErrorString(code, &str); char err[1024] = {{0}}; strcat(err, prefix); strcat(err, str); PyGILState_STATE gil_state; gil_state = PyGILState_Ensure(); PyErr_SetString(PyExc_RuntimeError, err); PyGILState_Release(gil_state); }} }} #define CUDA_CHECK(ans) {{ gpuAssert((ans), __FILE__, __LINE__); }} typedef CUresult (*cuLaunchKernelEx_t)(const CUlaunchConfig* config, CUfunction f, void** kernelParams, void** extra); static cuLaunchKernelEx_t getLaunchKernelExHandle() {{ // Open the shared library void* handle = dlopen("libcuda.so.1", RTLD_LAZY); if (!handle) {{ PyErr_SetString(PyExc_RuntimeError, "Failed to open libcuda.so.1"); return NULL; }} // Clear any existing error dlerror(); cuLaunchKernelEx_t cuLaunchKernelExHandle = (cuLaunchKernelEx_t)dlsym(handle, "cuLaunchKernelEx"); // Check for errors const char *dlsym_error = dlerror(); if (dlsym_error) {{ PyErr_SetString(PyExc_RuntimeError, "Failed to retrieve cuLaunchKernelEx from libcuda.so.1"); return NULL; }} return cuLaunchKernelExHandle; }} static void _launch(int gridX, int gridY, int gridZ, int num_warps, int num_ctas, int launch_cooperative_grid, int launch_pdl, int clusterDimX, int clusterDimY, int clusterDimZ, int shared_memory, CUstream stream, CUfunction function, CUdeviceptr global_scratch{', ' + arg_decls if len(arg_decls) > 0 else ''}) {{ void *params[] = {{ {', '.join(params)} }}; if (gridX*gridY*gridZ > 0) {{ // 4 attributes that we can currently pass maxmimum CUlaunchAttribute launchAttr[4]; static cuLaunchKernelEx_t cuLaunchKernelExHandle = NULL; if (cuLaunchKernelExHandle == NULL) {{ cuLaunchKernelExHandle = getLaunchKernelExHandle(); }} CUlaunchConfig config; config.gridDimX = gridX; config.gridDimY = gridY; config.gridDimZ = gridZ; if (num_ctas != 1) {{ config.gridDimX *= clusterDimX; config.gridDimY *= clusterDimY; config.gridDimZ *= clusterDimZ; }} config.blockDimX = 32 * num_warps; config.blockDimY = 1; config.blockDimZ = 1; config.sharedMemBytes = shared_memory; config.hStream = stream; config.attrs = launchAttr; int num_attrs = 0; if (launch_pdl != 0) {{ CUlaunchAttribute pdlAttr = {{ .id = CU_LAUNCH_ATTRIBUTE_PROGRAMMATIC_STREAM_SERIALIZATION, .value = 1}}; launchAttr[num_attrs] = pdlAttr; ++num_attrs; }} if (launch_cooperative_grid != 0) {{ CUlaunchAttribute coopAttr = {{ .id = CU_LAUNCH_ATTRIBUTE_COOPERATIVE, .value = 1}}; launchAttr[num_attrs] = coopAttr; ++num_attrs; }} if (num_ctas != 1) {{ CUlaunchAttribute clusterAttr = {{}}; clusterAttr.id = CU_LAUNCH_ATTRIBUTE_CLUSTER_DIMENSION; clusterAttr.value.clusterDim.x = clusterDimX; clusterAttr.value.clusterDim.y = clusterDimY; clusterAttr.value.clusterDim.z = clusterDimZ; launchAttr[num_attrs] = clusterAttr; ++num_attrs; CUlaunchAttribute clusterSchedulingAttr = {{}}; clusterSchedulingAttr.id = CU_LAUNCH_ATTRIBUTE_CLUSTER_SCHEDULING_POLICY_PREFERENCE; clusterSchedulingAttr.value.clusterSchedulingPolicyPreference = CU_CLUSTER_SCHEDULING_POLICY_SPREAD; launchAttr[num_attrs] = clusterSchedulingAttr; ++num_attrs; }} config.numAttrs = num_attrs; CUDA_CHECK(cuLaunchKernelExHandle(&config, function, params, 0)); }} }} typedef struct _DevicePtrInfo {{ CUdeviceptr dev_ptr; bool valid; }} DevicePtrInfo; static inline DevicePtrInfo getPointer(PyObject *obj, int idx) {{ DevicePtrInfo ptr_info; ptr_info.dev_ptr = 0; ptr_info.valid = true; if (PyLong_Check(obj)) {{ ptr_info.dev_ptr = PyLong_AsUnsignedLongLong(obj); return ptr_info; }} if (obj == Py_None) {{ // valid nullptr return ptr_info; }} PyObject *ptr = PyObject_GetAttrString(obj, "data_ptr"); if(ptr){{ PyObject *empty_tuple = PyTuple_New(0); PyObject *ret = PyObject_Call(ptr, empty_tuple, NULL); Py_DECREF(empty_tuple); Py_DECREF(ptr); if (!PyLong_Check(ret)) {{ PyErr_SetString(PyExc_TypeError, "data_ptr method of Pointer object must return 64-bit int"); ptr_info.valid = false; return ptr_info; }} ptr_info.dev_ptr = PyLong_AsUnsignedLongLong(ret); if(!ptr_info.dev_ptr) return ptr_info; uint64_t dev_ptr; int status = cuPointerGetAttribute(&dev_ptr, CU_POINTER_ATTRIBUTE_DEVICE_POINTER, ptr_info.dev_ptr); if (status == CUDA_ERROR_INVALID_VALUE) {{ PyErr_Format(PyExc_ValueError, "Pointer argument (at %d) cannot be accessed from Triton (cpu tensor?)", idx); ptr_info.valid = false; }} else if (status != CUDA_SUCCESS) {{ CUDA_CHECK(status); // Catch any other cuda API errors ptr_info.valid = false; }} ptr_info.dev_ptr = dev_ptr; Py_DECREF(ret); // Thanks ChatGPT! return ptr_info; }} PyErr_SetString(PyExc_TypeError, "Pointer argument must be either uint64 or have data_ptr method"); ptr_info.valid = false; return ptr_info; }} static inline CUtensorMap* getTmaDesc(PyObject *obj) {{ if (sizeof(CUtensorMap*) != 8) {{ PyErr_SetString(PyExc_SystemError, "getTmaDesc() requires 64-bit compilation"); return NULL; }} PyObject *method_handle = PyObject_GetAttrString(obj, "tma_desc_cpu_ptr"); if (!method_handle) {{ PyErr_SetString(PyExc_TypeError, "tma_desc_cpu_ptr() method does not exist"); return NULL; }} PyObject *empty_tuple = PyTuple_New(0); if (!empty_tuple) {{ Py_DECREF(method_handle); PyErr_SetString(PyExc_SystemError, "Internal Python error!"); return NULL; }} PyObject *method_ret = PyObject_Call(method_handle, empty_tuple, NULL); Py_DECREF(empty_tuple); Py_DECREF(method_handle); if (!method_ret) {{ PyErr_SetString(PyExc_SystemError, "Internal Python error!"); return NULL; }} if (!PyLong_Check(method_ret)) {{ PyErr_SetString(PyExc_TypeError, "tma_desc_cpu_ptr() must return 64-bit int"); Py_DECREF(method_ret); return NULL; }} uint64_t ptr_as_uint = PyLong_AsUnsignedLongLong(method_ret); Py_DECREF(method_ret); if (!ptr_as_uint) {{ PyErr_SetString(PyExc_ValueError, "received NULL ptr from tma_desc_cpu_ptr()"); return NULL; }} if (ptr_as_uint % 64 != 0) {{ PyErr_SetString(PyExc_ValueError, "tma_desc_cpu_ptr() must be 64-byte aligned"); return NULL; }} return (CUtensorMap*)(ptr_as_uint); }} static void ensureCudaContext() {{ CUcontext pctx; CUDA_CHECK(cuCtxGetCurrent(&pctx)); if (!pctx) {{ // Ensure device context. CUdevice device; CUDA_CHECK(cuDeviceGet(&device, 0)); CUDA_CHECK(cuDevicePrimaryCtxRetain(&pctx, device)); CUDA_CHECK(cuCtxSetCurrent(pctx)); }} }} static uint16_t pack_fp16(double f) {{ uint16_t result; // from https://github.com/python/pythoncapi-compat #if 0x030600B1 <= PY_VERSION_HEX && PY_VERSION_HEX <= 0x030B00A1 && !defined(PYPY_VERSION) _PyFloat_Pack2(f, (unsigned char*)&result, 1); #else PyFloat_Pack2(f, (unsigned char*)&result, 1); #endif return result; }} static uint16_t pack_bf16(double f) {{ float f32 = (float)f; uint32_t u32 = *(uint32_t*)&f32; return (uint16_t)(u32 >> 16); }} static uint32_t pack_fp32(double f) {{ float f32 = (float)f; return *(uint32_t*)&f32; }} static uint64_t pack_fp64(double f) {{ return *(uint64_t*)&f; }} static PyObject* launch(PyObject* self, PyObject* args) {{ // ensure cuda context is valid before calling any CUDA APIs, e.g. before getPointer calls cuPointerGetAttributes ensureCudaContext(); int gridX, gridY, gridZ; uint64_t _stream; uint64_t _function; int launch_cooperative_grid; int launch_pdl; PyObject *launch_enter_hook = NULL; PyObject *launch_exit_hook = NULL; PyObject *kernel_metadata = NULL; PyObject *launch_metadata = NULL; PyObject *global_scratch_obj = NULL; {newline.join([f"{_extracted_type(ty)} _arg{i};" for i, ty in signature.items()])} if(!PyArg_ParseTuple(args, \"{format}\", &gridX, &gridY, &gridZ, &_stream, &_function, &launch_cooperative_grid, &launch_pdl, &global_scratch_obj, &kernel_metadata, &launch_metadata, &launch_enter_hook, &launch_exit_hook{args_list})) {{ return NULL; }} int num_warps, num_ctas, shared_memory, clusterDimX, clusterDimY, clusterDimZ; if (!PyArg_ParseTuple(kernel_metadata, \"iiiiii\", &num_warps, &num_ctas, &shared_memory, &clusterDimX, &clusterDimY, &clusterDimZ)) {{ PyErr_SetString(PyExc_TypeError, "kernel_metadata must be a tuple"); return NULL; }} // extract launch metadata if (launch_enter_hook != Py_None){{ PyObject* args = Py_BuildValue("(O)", launch_metadata); PyObject* ret = PyObject_CallObject(launch_enter_hook, args); Py_DECREF(args); if (!ret) return NULL; Py_DECREF(ret); }} CUdeviceptr global_scratch = 0; if (global_scratch_obj != Py_None) {{ DevicePtrInfo global_scratch_info = getPointer(global_scratch_obj, -1); if (!global_scratch_info.valid) {{ return NULL; }} global_scratch = global_scratch_info.dev_ptr; }} // raise exception asap {newline.join(ptr_decls)} {newline.join(tma_decls)} {newline.join(float_storage_decls)} Py_BEGIN_ALLOW_THREADS; _launch(gridX, gridY, gridZ, num_warps, num_ctas, launch_cooperative_grid, launch_pdl, clusterDimX, clusterDimY, clusterDimZ, shared_memory, (CUstream)_stream, (CUfunction)_function, global_scratch{', ' + ', '.join(internal_args_list) if len(internal_args_list) > 0 else ''}); Py_END_ALLOW_THREADS; if (PyErr_Occurred()) {{ return NULL; }} if(launch_exit_hook != Py_None){{ PyObject* args = Py_BuildValue("(O)", launch_metadata); PyObject* ret = PyObject_CallObject(launch_exit_hook, args); Py_DECREF(args); if (!ret) return NULL; Py_DECREF(ret); }} Py_RETURN_NONE; }} static PyMethodDef ModuleMethods[] = {{ {{"launch", launch, METH_VARARGS, "Entry point for all kernels with this signature"}}, {{NULL, NULL, 0, NULL}} // sentinel }}; static struct PyModuleDef ModuleDef = {{ PyModuleDef_HEAD_INIT, \"__triton_launcher\", NULL, //documentation -1, //size ModuleMethods }}; PyMODINIT_FUNC PyInit___triton_launcher(void) {{ PyObject *m = PyModule_Create(&ModuleDef); if(m == NULL) {{ return NULL; }} PyModule_AddFunctions(m, ModuleMethods); return m; }} """ return src class TmaDescKernelParam: TMA_DESC_SIZE = 128 def __init__(self): import torch self.desc = torch.empty(self.TMA_DESC_SIZE, dtype=torch.uint8, device="cpu") # Return a CUtensorMap* pointer in host memory def tma_desc_cpu_ptr(self): return self.desc.data_ptr() # The TMA dtype enum values are slightly different on host vs device... TMA_DTYPE_DEVICE_TO_HOST = dict((i, i) for i in range(16)) TMA_DTYPE_DEVICE_TO_HOST[8] = 10 TMA_DTYPE_DEVICE_TO_HOST[9] = 8 TMA_DTYPE_DEVICE_TO_HOST[10] = 9 def make_tensordesc_arg(arg, metadata): if metadata is None: # Currently the host side tensor descriptors get decomposed in # the frontend to tensor desc, shape, and strides. We have no # way to use these shape and strides when processing tensor # descriptors which is why we provide our own decomposition # above. Sadly this means we have to pass the shape and strides # twice. return [arg.base, *arg.shape, *arg.strides, *arg.shape, *arg.strides] swizzle = metadata["swizzle"] elem_size = metadata["elem_size"] elem_type = metadata["elem_type"] block_size = metadata["block_size"] fp4_padded = metadata["fp4_padded"] data_ptr = arg.base.data_ptr() shape = arg.shape strides = arg.strides assert strides[-1] == 1 desc = TmaDescKernelParam() result = [desc, *shape, *strides] if fp4_padded: shape = list(shape) shape[-1] *= 2 triton.runtime.driver.active.utils.fill_tma_descriptor( desc.tma_desc_cpu_ptr(), data_ptr, swizzle, elem_size, TMA_DTYPE_DEVICE_TO_HOST[elem_type], block_size, shape, strides, ) return result def wrap_handle_tensordesc(launcher, tensordesc_meta): from triton.tools.tensor_descriptor import TensorDescriptor from triton.experimental.gluon.nvidia.hopper import TensorDescriptor as GluonTensorDescriptor def inner(*args): meta_args = args[:len(_BASE_ARGS_FORMAT)] raw_kernel_args = args[len(_BASE_ARGS_FORMAT):] tensordesc_idx = 0 final_args = [] for i, arg in enumerate(raw_kernel_args): if isinstance(arg, (TensorDescriptor, GluonTensorDescriptor)): meta = tensordesc_meta[tensordesc_idx] if tensordesc_meta else None tensordesc_idx += 1 final_args.extend(make_tensordesc_arg(arg, meta)) else: final_args.append(arg) assert not tensordesc_meta or tensordesc_idx == len(tensordesc_meta) return launcher(*meta_args, *final_args) return inner class CudaLauncher(object): def __init__(self, src, metadata): constants = src.constants if hasattr(src, "constants") else dict() arg_idx = lambda x: (src.fn.arg_names.index(x), ) if isinstance(x, str) else x constants = {arg_idx(idx): value for idx, value in constants.items()} signature = {idx: value for idx, value in src.signature.items()} tensordesc_meta = getattr(metadata, "tensordesc_meta", None) src = make_launcher(constants, signature, tensordesc_meta) mod = compile_module_from_src( src=src, name="__triton_launcher", library_dirs=library_dirs(), include_dirs=include_dirs, libraries=libraries, ) has_tensor_desc_arg = any(isinstance(sig, str) and sig.startswith("tensordesc") for sig in signature.values()) self.num_ctas = functools.reduce(operator.mul, metadata.cluster_dims, 1) self.launch = wrap_handle_tensordesc(mod.launch, tensordesc_meta) if has_tensor_desc_arg else mod.launch self.global_scratch_size = metadata.global_scratch_size self.global_scratch_align = metadata.global_scratch_align self.launch_cooperative_grid = metadata.launch_cooperative_grid self.launch_pdl = metadata.launch_pdl def __call__(self, gridX, gridY, gridZ, stream, function, *args): if self.global_scratch_size > 0: grid_size = gridX * gridY * gridZ alloc_size = grid_size * self.num_ctas * self.global_scratch_size global_scratch = _allocation._allocator(alloc_size, self.global_scratch_align, stream) else: global_scratch = None self.launch(gridX, gridY, gridZ, stream, function, self.launch_cooperative_grid, self.launch_pdl, global_scratch, *args) class CudaDriver(GPUDriver): def __init__(self): self.utils = CudaUtils() # TODO: make static self.launcher_cls = CudaLauncher super().__init__() def get_current_target(self): device = self.get_current_device() capability = self.get_device_capability(device) capability = capability[0] * 10 + capability[1] warp_size = 32 return GPUTarget("cuda", capability, warp_size) def get_active_torch_device(self): import torch return torch.device("cuda", self.get_current_device()) def get_device_interface(self): import torch return torch.cuda @staticmethod def is_active(): try: import torch return torch.cuda.is_available() and (torch.version.hip is None) except ImportError: return False def get_benchmarker(self): from triton.testing import do_bench return do_bench def get_empty_cache_for_benchmark(self): import torch # We maintain a buffer of 256 MB that we clear # before each kernel call to make sure that the L2 cache # doesn't contain any input data before the run cache_size = 256 * 1024 * 1024 return torch.empty(int(cache_size // 4), dtype=torch.int, device='cuda') def clear_cache(self, cache): cache.zero_()