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/*
* Copyright (C) 2020 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "ResilientBurst.h"
#include <android-base/logging.h>
#include <android-base/thread_annotations.h>
#include <nnapi/IBurst.h>
#include <nnapi/IPreparedModel.h>
#include <nnapi/Result.h>
#include <nnapi/TypeUtils.h>
#include <nnapi/Types.h>
#include <functional>
#include <memory>
#include <mutex>
#include <optional>
#include <utility>
#include "InvalidExecution.h"
#include "ResilientExecution.h"
namespace android::hardware::neuralnetworks::utils {
namespace {
template <typename FnType>
auto protect(const ResilientBurst& resilientBurst, const FnType& fn)
-> decltype(fn(*resilientBurst.getBurst())) {
auto burst = resilientBurst.getBurst();
auto result = fn(*burst);
// Immediately return if burst is not dead.
if (result.has_value() || result.error().code != nn::ErrorStatus::DEAD_OBJECT) {
return result;
}
// Attempt recovery and return if it fails.
auto maybeBurst = resilientBurst.recover(burst.get());
if (!maybeBurst.has_value()) {
const auto& [message, code] = maybeBurst.error();
std::ostringstream oss;
oss << ", and failed to recover dead burst object with error " << code << ": " << message;
result.error().message += oss.str();
return result;
}
burst = std::move(maybeBurst).value();
return fn(*burst);
}
} // namespace
nn::GeneralResult<std::shared_ptr<const ResilientBurst>> ResilientBurst::create(Factory makeBurst) {
if (makeBurst == nullptr) {
return NN_ERROR(nn::ErrorStatus::INVALID_ARGUMENT)
<< "utils::ResilientBurst::create must have non-empty makeBurst";
}
auto burst = NN_TRY(makeBurst());
CHECK(burst != nullptr);
return std::make_shared<ResilientBurst>(PrivateConstructorTag{}, std::move(makeBurst),
std::move(burst));
}
ResilientBurst::ResilientBurst(PrivateConstructorTag /*tag*/, Factory makeBurst,
nn::SharedBurst burst)
: kMakeBurst(std::move(makeBurst)), mBurst(std::move(burst)) {
CHECK(kMakeBurst != nullptr);
CHECK(mBurst != nullptr);
}
nn::SharedBurst ResilientBurst::getBurst() const {
std::lock_guard guard(mMutex);
return mBurst;
}
nn::GeneralResult<nn::SharedBurst> ResilientBurst::recover(const nn::IBurst* failingBurst) const {
std::lock_guard guard(mMutex);
// Another caller updated the failing burst.
if (mBurst.get() != failingBurst) {
return mBurst;
}
mBurst = NN_TRY(kMakeBurst());
return mBurst;
}
ResilientBurst::OptionalCacheHold ResilientBurst::cacheMemory(
const nn::SharedMemory& memory) const {
return getBurst()->cacheMemory(memory);
}
nn::ExecutionResult<std::pair<std::vector<nn::OutputShape>, nn::Timing>> ResilientBurst::execute(
const nn::Request& request, nn::MeasureTiming measure,
const nn::OptionalTimePoint& deadline, const nn::OptionalDuration& loopTimeoutDuration,
const std::vector<nn::TokenValuePair>& hints,
const std::vector<nn::ExtensionNameAndPrefix>& extensionNameToPrefix) const {
const auto fn = [&request, measure, deadline, loopTimeoutDuration, &hints,
&extensionNameToPrefix](const nn::IBurst& burst) {
return burst.execute(request, measure, deadline, loopTimeoutDuration, hints,
extensionNameToPrefix);
};
return protect(*this, fn);
}
nn::GeneralResult<nn::SharedExecution> ResilientBurst::createReusableExecution(
const nn::Request& request, nn::MeasureTiming measure,
const nn::OptionalDuration& loopTimeoutDuration,
const std::vector<nn::TokenValuePair>& hints,
const std::vector<nn::ExtensionNameAndPrefix>& extensionNameToPrefix) const {
#if 0
auto self = shared_from_this();
ResilientExecution::Factory makeExecution = [burst = std::move(self), request, measure,
loopTimeoutDuration, &hints,
&extensionNameToPrefix] {
return burst->createReusableExecutionInternal(request, measure, loopTimeoutDuration, hints,
extensionNameToPrefix);
};
return ResilientExecution::create(std::move(makeExecution));
#else
return createReusableExecutionInternal(request, measure, loopTimeoutDuration, hints,
extensionNameToPrefix);
#endif
}
nn::GeneralResult<nn::SharedExecution> ResilientBurst::createReusableExecutionInternal(
const nn::Request& request, nn::MeasureTiming measure,
const nn::OptionalDuration& loopTimeoutDuration,
const std::vector<nn::TokenValuePair>& hints,
const std::vector<nn::ExtensionNameAndPrefix>& extensionNameToPrefix) const {
if (!isValidInternal()) {
return std::make_shared<const InvalidExecution>();
}
const auto fn = [&request, measure, &loopTimeoutDuration, &hints,
&extensionNameToPrefix](const nn::IBurst& burst) {
return burst.createReusableExecution(request, measure, loopTimeoutDuration, hints,
extensionNameToPrefix);
};
return protect(*this, fn);
}
bool ResilientBurst::isValidInternal() const {
return true;
}
} // namespace android::hardware::neuralnetworks::utils
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