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https://github.com/pytorch/pytorch.git
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079f909263
This reverts commit be0b75256a7e516217b059ef273901b95c022fe7. Reverted https://github.com/pytorch/pytorch/pull/136519 on behalf of https://github.com/jovianjaison due to this pr is causing errors internally ([comment](https://github.com/pytorch/pytorch/pull/136519#issuecomment-2405781093))
91 lines
2.9 KiB
C++
91 lines
2.9 KiB
C++
#include <ATen/ATen.h>
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#include <c10/core/DeviceType.h>
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#include <c10/core/Stream.h>
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#include <c10/util/CallOnce.h>
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#include <torch/csrc/Generator.h>
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#include <torch/csrc/Stream.h>
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#include <torch/csrc/python_headers.h>
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#include <torch/csrc/utils/device_lazy_init.h>
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#include <torch/csrc/utils/pybind.h>
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#ifndef WIN32
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#include <pthread.h>
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#endif
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namespace torch::mtia {
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static bool in_bad_fork = false; // True for children forked after mtia init
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#ifndef WIN32
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// Called in the forked child if mtia has already been initialized
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static void forked_child() {
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in_bad_fork = true;
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torch::utils::set_requires_device_init(at::kMTIA, true);
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}
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#endif
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// Should be called before the first mtia call.
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// Note: This is distinct from initExtension because a stub mtia implementation
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// has some working functions (e.g. device_count) but cannot fully initialize.
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static void poison_fork() {
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#ifndef WIN32
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static c10::once_flag flag;
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c10::call_once(flag, [] { pthread_atfork(nullptr, nullptr, forked_child); });
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#endif
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}
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void initModule(PyObject* module) {
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auto m = py::handle(module).cast<py::module>();
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m.def("_mtia_init", []() {
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TORCH_INTERNAL_ASSERT(!in_bad_fork); // Handled at python level
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poison_fork();
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at::globalContext().lazyInitMTIA();
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});
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m.def("_mtia_isBuilt", []() {
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// Check if the MTIAHooks class has been registered with the registry.
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return at::detail::isMTIAHooksBuilt();
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});
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m.def("_mtia_isInBadFork", []() { return in_bad_fork; });
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m.def("_mtia_getCurrentStream", [](c10::DeviceIndex device_index) {
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torch::utils::device_lazy_init(at::kMTIA);
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return at::detail::getMTIAHooks().getCurrentStream(device_index);
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});
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m.def("_mtia_deviceSynchronize", []() {
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torch::utils::device_lazy_init(at::kMTIA);
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at::detail::getMTIAHooks().deviceSynchronize(
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at::detail::getMTIAHooks().getCurrentDevice());
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});
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m.def("_mtia_getDefaultStream", [](c10::DeviceIndex device_index) {
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torch::utils::device_lazy_init(at::kMTIA);
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return at::detail::getMTIAHooks().getDefaultStream(device_index);
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});
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m.def("_mtia_setCurrentStream", [](const c10::Stream& stream) {
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torch::utils::device_lazy_init(at::kMTIA);
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auto device = at::detail::getMTIAHooks().getCurrentDevice();
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if (device != stream.device_index()) {
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at::detail::getMTIAHooks().setCurrentDevice(stream.device_index());
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}
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at::detail::getMTIAHooks().setCurrentStream(stream);
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});
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m.def("_mtia_memoryStats", [](c10::DeviceIndex device_index) {
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PyObject* raw_pyobject =
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at::detail::getMTIAHooks().memoryStats(device_index);
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return py::reinterpret_steal<py::object>(raw_pyobject);
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});
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m.def("_mtia_getDeviceCapability", [](c10::DeviceIndex device_index) {
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PyObject* raw_pyobject =
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at::detail::getMTIAHooks().getDeviceCapability(device_index);
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return py::reinterpret_steal<py::object>(raw_pyobject);
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});
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}
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} // namespace torch::mtia
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