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#include <torch/csrc/jit/runtime/script_profile.h>
#include <atomic>
#include <chrono>
#include <mutex>
#include <unordered_set>
#include <c10/util/Exception.h>
#include <c10/util/intrusive_ptr.h>
#include <torch/csrc/jit/api/function_impl.h>
namespace torch {
namespace jit {
namespace {
class ProfilesRegistry {
public:
bool empty() {
return empty_.load(std::memory_order_relaxed);
}
void addProfile(ScriptProfile& p) {
std::lock_guard<std::mutex> g(mutex_);
enabledProfiles_.emplace(&p);
empty_.store(false, std::memory_order_relaxed);
}
void removeProfile(ScriptProfile& p) {
std::lock_guard<std::mutex> g(mutex_);
enabledProfiles_.erase(&p);
if (enabledProfiles_.empty()) {
empty_.store(true, std::memory_order_relaxed);
}
}
void send(std::unique_ptr<profiling::Datapoint> datapoint) {
auto shared = std::shared_ptr<profiling::Datapoint>(std::move(datapoint));
std::lock_guard<std::mutex> g(mutex_);
for (auto* p : enabledProfiles_) {
p->addDatapoint(shared);
}
}
private:
std::atomic<bool> empty_{true};
std::mutex mutex_;
std::unordered_set<ScriptProfile*> enabledProfiles_;
};
ProfilesRegistry& getProfilesRegistry() {
static auto registry = std::ref(*new ProfilesRegistry{});
return registry;
}
auto initBindings() {
torch::class_<SourceRef>("profiling", "SourceRef")
.def(
"starting_lineno",
[](const c10::intrusive_ptr<SourceRef>& self) {
return static_cast<int64_t>((*self)->starting_line_no());
})
.def("text", [](const c10::intrusive_ptr<SourceRef>& self) {
return (*self)->text_str().str();
});
torch::class_<InstructionStats>("profiling", "InstructionStats")
.def(
"count",
[](const c10::intrusive_ptr<InstructionStats>& self) {
return self->count;
})
.def("duration_ns", [](const c10::intrusive_ptr<InstructionStats>& self) {
return static_cast<int64_t>(self->duration.count());
});
torch::class_<SourceStats>("profiling", "SourceStats")
.def(
"source",
[](const c10::intrusive_ptr<SourceStats>& self) {
return c10::make_intrusive<SourceRef>(self->getSourceRef());
})
.def("line_map", &SourceStats::getLineMap);
torch::class_<ScriptProfile>("profiling", "_ScriptProfile")
.def(torch::init<>())
.def("enable", &ScriptProfile::enable)
.def("disable", &ScriptProfile::disable)
.def("_dump_stats", [](const c10::intrusive_ptr<ScriptProfile>& self) {
const auto& stats = self->dumpStats();
c10::List<c10::intrusive_ptr<SourceStats>> ret;
for (const auto& source : stats) {
SourceStats::LineMap lineMap;
for (const auto& line : source.second) {
lineMap.insert(
line.first, c10::make_intrusive<InstructionStats>(line.second));
}
ret.push_back(c10::make_intrusive<SourceStats>(
source.first, std::move(lineMap)));
}
return ret;
});
return nullptr;
}
const auto C10_UNUSED torchBindInitializer = initBindings();
} // namespace
namespace profiling {
InstructionSpan::InstructionSpan(Node& node) {
if (getProfilesRegistry().empty()) {
return;
}
datapoint_ = std::make_unique<Datapoint>(node.sourceRange());
}
InstructionSpan::~InstructionSpan() {
if (!datapoint_) {
return;
}
datapoint_->end = std::chrono::steady_clock::now();
getProfilesRegistry().send(std::move(datapoint_));
}
} // namespace profiling
void ScriptProfile::enable() {
if (!std::exchange(enabled_, true)) {
getProfilesRegistry().addProfile(*this);
}
}
void ScriptProfile::disable() {
if (std::exchange(enabled_, false)) {
getProfilesRegistry().removeProfile(*this);
}
}
void ScriptProfile::addDatapoint(
std::shared_ptr<profiling::Datapoint> datapoint) {
TORCH_CHECK(enabled_, "Cannot only add datapoint to disabled profilers.");
datapoints_.push_back(std::move(datapoint));
}
const ScriptProfile::SourceMap& ScriptProfile::dumpStats() {
TORCH_CHECK(!enabled_, "Only disabled profilers are allowed to dump stats.");
for (const auto& datapoint : datapoints_) {
if (const auto& source = datapoint->sourceRange.source()) {
if (auto fileLineCol = datapoint->sourceRange.file_line_col()) {
auto it = sourceMap_.find(*source.get());
if (it == sourceMap_.end()) {
it = sourceMap_.emplace(SourceRef{source}, LineMap{}).first;
}
auto& stats = it->second[std::get<1>(*fileLineCol)];
stats.count++;
stats.duration += datapoint->end - datapoint->start;
}
}
}
datapoints_.clear();
return sourceMap_;
}
ScriptProfile::~ScriptProfile() {
if (enabled_) {
getProfilesRegistry().removeProfile(*this);
}
}
} // namespace jit
} // namespace torch
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