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#include <ATen/detail/MTIAHooksInterface.h>
#include <c10/core/Device.h>
#include <c10/core/Stream.h>
#include <c10/core/impl/DeviceGuardImplInterface.h>
#include <c10/util/Logging.h>
#include <torch/csrc/utils/device_lazy_init.h>
#include <thread>
namespace torch::mtia {
constexpr c10::DeviceType kMTIADeviceType = c10::DeviceType::MTIA;
constexpr c10::DeviceIndex kMTIADeviceCount = 2;
static thread_local c10::DeviceIndex current_device = 0;
static thread_local std::array<c10::Stream, kMTIADeviceCount> current_streams =
{c10::Stream::unpack3(0, 0, c10::DeviceType::MTIA),
c10::Stream::unpack3(0, 1, c10::DeviceType::MTIA)};
static int64_t stream_id_gen = 1;
static int64_t event_id_gen = 1;
static std::array<c10::Stream, kMTIADeviceCount> default_streams = {
c10::Stream::unpack3(0, 0, c10::DeviceType::MTIA),
c10::Stream::unpack3(0, 1, c10::DeviceType::MTIA)};
struct MTIAGuardImpl final : public c10::impl::DeviceGuardImplInterface {
MTIAGuardImpl() = default;
explicit MTIAGuardImpl(c10::DeviceType t) {
TORCH_INTERNAL_ASSERT(t == kMTIADeviceType);
}
c10::DeviceType type() const override {
return kMTIADeviceType;
}
c10::Device exchangeDevice(c10::Device d) const override {
c10::Device old_device = getDevice();
if (old_device.index() != d.index()) {
setDevice(d);
}
return old_device;
}
c10::Device getDevice() const override {
return c10::Device(kMTIADeviceType, current_device);
}
void setDevice(c10::Device d) const override {
c10::Device current_device = getDevice();
if (current_device.index() != d.index()) {
current_device = d;
}
}
void uncheckedSetDevice(c10::Device d) const noexcept override {
(void)d;
}
c10::Stream getStream(c10::Device d) const noexcept override {
return current_streams[d.index()];
}
c10::Stream getNewStream(c10::Device d, int priority = 0) const override {
(void)priority;
return c10::Stream::unpack3(stream_id_gen++, d.index(), d.type());
}
c10::Stream getDefaultStream(c10::Device d) const override {
return default_streams[d.index()];
}
c10::Stream getStreamFromGlobalPool(
c10::Device d,
bool isHighPriority = false) const override {
return c10::Stream::unpack3(stream_id_gen++, d.index(), d.type());
}
// NB: These do NOT set the current device
c10::Stream exchangeStream(c10::Stream s) const noexcept override {
c10::Stream old_stream = getStream(s.device());
return old_stream;
}
c10::DeviceIndex deviceCount() const noexcept override {
return kMTIADeviceCount;
}
void destroyEvent(void* event, const c10::DeviceIndex device_index)
const noexcept override {
(void)device_index;
}
void record(
void** event,
const c10::Stream& stream,
const c10::DeviceIndex device_index,
const c10::EventFlag flag) const override {
TORCH_CHECK(
device_index == -1 || device_index == stream.device_index(),
"Event device index ",
device_index,
" does not match recording stream's device index ",
stream.device_index(),
".");
const auto orig_device = getDevice();
setDevice(stream.device());
if (*event == nullptr) {
*event = reinterpret_cast<void*>(event_id_gen++);
}
setDevice(orig_device);
}
void block(void* event, const c10::Stream& stream) const override {
(void)event;
(void)stream;
}
// May be called from any device
bool queryEvent(void* event) const override {
(void)event;
return true;
}
// Stream-related functions
bool queryStream(const c10::Stream& stream) const override {
(void)stream;
return true;
}
void synchronizeStream(const c10::Stream& stream) const override {
(void)stream;
}
void recordDataPtrOnStream(
const c10::DataPtr& data_ptr,
const c10::Stream& stream) const override {
(void)data_ptr;
(void)stream;
}
double elapsedTime(void* event1, void* event2, const c10::DeviceIndex device_index) const override {
(void)device_index;
uint64_t elapsed_time = 1e6;
return (double)(elapsed_time / 1e6);
}
void synchronizeEvent(void* event) const override {
(void)event;
}
};
struct MTIAHooks : public at::MTIAHooksInterface {
explicit MTIAHooks(at::MTIAHooksArgs) {}
void init() const override {}
bool hasMTIA() const override {
return true;
}
c10::DeviceIndex deviceCount() const override {
torch::utils::device_lazy_init(at::kMTIA);
return c10::DeviceIndex(2);
}
void deviceSynchronize(c10::DeviceIndex device_index) const override {
torch::utils::device_lazy_init(at::kMTIA);
(void)device_index;
}
std::string showConfig() const override {
return "None config";
}
c10::DeviceIndex exchangeDevice(c10::DeviceIndex device) const override {
torch::utils::device_lazy_init(at::kMTIA);
auto orig_device = current_device;
if (current_device != device) {
current_device = device;
}
return orig_device;
}
c10::DeviceIndex maybeExchangeDevice(c10::DeviceIndex device) const override {
torch::utils::device_lazy_init(at::kMTIA);
auto orig_device = current_device;
if (current_device != device) {
current_device = device;
}
return orig_device;
}
c10::Stream getDefaultStream(c10::DeviceIndex device) const override {
torch::utils::device_lazy_init(at::kMTIA);
return default_streams[device];
}
c10::Stream getCurrentStream(c10::DeviceIndex device) const override {
torch::utils::device_lazy_init(at::kMTIA);
return current_streams[device];
}
void setCurrentStream(const c10::Stream& stream) const override {
torch::utils::device_lazy_init(at::kMTIA);
current_streams[stream.device_index()] = stream;
}
c10::DeviceIndex getCurrentDevice() const override {
torch::utils::device_lazy_init(at::kMTIA);
return current_device;
}
void setCurrentDevice(c10::DeviceIndex device) const override {
torch::utils::device_lazy_init(at::kMTIA);
if (current_device != device) {
current_device = device;
}
}
};
using at::MTIAHooksRegistry;
using at::RegistererMTIAHooksRegistry;
REGISTER_MTIA_HOOKS(MTIAHooks);
C10_REGISTER_GUARD_IMPL(MTIA, MTIAGuardImpl);
} // namespace torch::mtia
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