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0f0b4bf029
This PR removes unused header inclusion in C++ files. Pull Request resolved: https://github.com/pytorch/pytorch/pull/165763 Approved by: https://github.com/Skylion007
93 lines
2.9 KiB
C++
93 lines
2.9 KiB
C++
#if !defined(USE_ROCM) && defined(PYTORCH_C10_DRIVER_API_SUPPORTED)
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#include <c10/cuda/CUDAException.h>
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#include <c10/cuda/driver_api.h>
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#include <c10/util/Exception.h>
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#include <c10/util/Logging.h>
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#include <cuda_runtime.h>
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#include <dlfcn.h>
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namespace c10::cuda {
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namespace {
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void* get_symbol(const char* name, int version);
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DriverAPI create_driver_api() {
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void* handle_1 = DriverAPI::get_nvml_handle();
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DriverAPI r{};
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#define LOOKUP_LIBCUDA_ENTRY_WITH_VERSION_REQUIRED(name, version) \
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r.name##_ = reinterpret_cast<decltype(&name)>(get_symbol(#name, version)); \
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TORCH_INTERNAL_ASSERT(r.name##_, "Can't find ", #name);
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C10_LIBCUDA_DRIVER_API_REQUIRED(LOOKUP_LIBCUDA_ENTRY_WITH_VERSION_REQUIRED)
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#undef LOOKUP_LIBCUDA_ENTRY_WITH_VERSION_REQUIRED
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// Users running drivers between 12.0 and 12.3 will not have these symbols,
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// they would be resolved into nullptr, but we guard their usage at runtime
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// to ensure safe fallback behavior.
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#define LOOKUP_LIBCUDA_ENTRY_WITH_VERSION_OPTIONAL(name, version) \
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r.name##_ = reinterpret_cast<decltype(&name)>(get_symbol(#name, version));
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C10_LIBCUDA_DRIVER_API_OPTIONAL(LOOKUP_LIBCUDA_ENTRY_WITH_VERSION_OPTIONAL)
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#undef LOOKUP_LIBCUDA_ENTRY_WITH_VERSION_OPTIONAL
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if (handle_1) {
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#define LOOKUP_NVML_ENTRY(name) \
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r.name##_ = ((decltype(&name))dlsym(handle_1, #name)); \
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TORCH_INTERNAL_ASSERT(r.name##_, "Can't find ", #name, ": ", dlerror())
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C10_NVML_DRIVER_API(LOOKUP_NVML_ENTRY)
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#undef LOOKUP_NVML_ENTRY
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}
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if (handle_1) {
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#define LOOKUP_NVML_ENTRY_OPTIONAL(name) \
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r.name##_ = ((decltype(&name))dlsym(handle_1, #name));
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C10_NVML_DRIVER_API_OPTIONAL(LOOKUP_NVML_ENTRY_OPTIONAL)
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#undef LOOKUP_NVML_ENTRY_OPTIONAL
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}
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return r;
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}
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void* get_symbol(const char* name, int version) {
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void* out = nullptr;
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cudaDriverEntryPointQueryResult qres{};
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// CUDA 12.5+ supports version-based lookup
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#if defined(CUDA_VERSION) && (CUDA_VERSION >= 12050)
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if (auto st = cudaGetDriverEntryPointByVersion(
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name, &out, version, cudaEnableDefault, &qres);
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st == cudaSuccess && qres == cudaDriverEntryPointSuccess && out) {
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return out;
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}
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#endif
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// As of CUDA 13, this API is deprecated.
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#if defined(CUDA_VERSION) && (CUDA_VERSION < 13000)
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// This fallback to the old API to try getting the symbol again.
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if (auto st = cudaGetDriverEntryPoint(name, &out, cudaEnableDefault, &qres);
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st == cudaSuccess && qres == cudaDriverEntryPointSuccess && out) {
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return out;
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}
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#endif
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// If the symbol cannot be resolved, report and return nullptr;
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// the caller is responsible for checking the pointer.
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LOG(INFO) << "Failed to resolve symbol " << name;
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return nullptr;
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}
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} // namespace
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void* DriverAPI::get_nvml_handle() {
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static void* nvml_hanle = dlopen("libnvidia-ml.so.1", RTLD_LAZY);
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return nvml_hanle;
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}
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C10_EXPORT DriverAPI* DriverAPI::get() {
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static DriverAPI singleton = create_driver_api();
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return &singleton;
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}
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} // namespace c10::cuda
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#endif
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