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* SPDX-FileCopyrightText: Copyright (c) 1993-2025 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
* SPDX-License-Identifier: Apache-2.0
*
* 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 "cacheUtils.h"
#include "NvInfer.h"
#include "fileLock.h"
#include <fstream>
#include <iostream>
#include <memory>
#include <sstream>
#include <stdexcept>
#include <string>
namespace nvinfer1::utils
{
std::vector<char> loadCacheFile(ILogger& logger, std::string const& inFileName)
{
try
{
FileLock fileLock{logger, inFileName};
std::ifstream iFile(inFileName, std::ios::in | std::ios::binary);
if (!iFile)
{
std::stringstream ss;
ss << "Could not read cache from: " << inFileName << ". A new cache will be generated and written.";
logger.log(ILogger::Severity::kWARNING, ss.str().c_str());
return std::vector<char>();
}
iFile.seekg(0, std::ifstream::end);
size_t fsize = iFile.tellg();
iFile.seekg(0, std::ifstream::beg);
std::vector<char> content(fsize);
iFile.read(content.data(), fsize);
iFile.close();
std::stringstream ss;
ss << "Loaded " << fsize << " bytes of cache from file: " << inFileName;
logger.log(ILogger::Severity::kINFO, ss.str().c_str());
return content;
}
catch (std::exception const& e)
{
std::cerr << "Exception while loading cache file " << inFileName << ": " << e.what() << std::endl;
}
return {};
}
std::unique_ptr<ITimingCache> buildTimingCacheFromFile(
ILogger& logger, IBuilderConfig& config, std::string const& timingCacheFile)
{
std::unique_ptr<nvinfer1::ITimingCache> timingCache{};
std::vector<char> timingCacheContents = loadCacheFile(logger, timingCacheFile);
timingCache.reset(config.createTimingCache(timingCacheContents.data(), timingCacheContents.size()));
if (timingCache == nullptr)
{
logger.log(ILogger::Severity::kERROR, ("Failed to create ITimingCache from file " + timingCacheFile).c_str());
return nullptr;
}
config.clearFlag(BuilderFlag::kDISABLE_TIMING_CACHE);
if (!config.setTimingCache(*timingCache, true))
{
logger.log(ILogger::Severity::kERROR,
("IBuilderConfig#setTimingCache failed with timing cache from file " + timingCacheFile).c_str());
return nullptr;
}
return timingCache;
}
void saveCacheFile(ILogger& logger, std::string const& outFileName, IHostMemory const* blob)
{
try
{
FileLock fileLock{logger, outFileName};
std::ofstream oFile(outFileName, std::ios::out | std::ios::binary);
if (!oFile)
{
std::stringstream ss;
ss << "Could not write cache to file: " << outFileName;
logger.log(ILogger::Severity::kWARNING, ss.str().c_str());
return;
}
oFile.write(reinterpret_cast<char const*>(blob->data()), blob->size());
oFile.close();
std::stringstream ss;
ss << "Saved " << blob->size() << " bytes of cache to file: " << outFileName;
logger.log(ILogger::Severity::kINFO, ss.str().c_str());
}
catch (std::exception const& e)
{
std::cerr << "Exception while saving cache file " << outFileName << ": " << e.what() << std::endl;
}
}
void updateTimingCacheFile(nvinfer1::ILogger& logger, std::string const& fileName,
nvinfer1::ITimingCache const* timingCache, nvinfer1::IBuilder& builder)
{
try
{
std::unique_ptr<IBuilderConfig> config{builder.createBuilderConfig()};
std::vector<char> timingCacheContents = loadCacheFile(logger, fileName);
std::unique_ptr<ITimingCache> fileTimingCache{
config->createTimingCache(timingCacheContents.data(), timingCacheContents.size())};
fileTimingCache->combine(*timingCache, false);
std::unique_ptr<IHostMemory> blob{fileTimingCache->serialize()};
if (!blob)
{
throw std::runtime_error("Failed to serialize combined ITimingCache!");
}
FileLock fileLock{logger, fileName};
std::ofstream oFile(fileName, std::ios::out | std::ios::binary);
if (!oFile)
{
std::stringstream ss;
ss << "Could not write timing cache to: " << fileName;
logger.log(ILogger::Severity::kWARNING, ss.str().c_str());
return;
}
oFile.write(reinterpret_cast<char const*>(blob->data()), blob->size());
oFile.close();
std::stringstream ss;
ss << "Saved " << blob->size() << " bytes of timing cache to " << fileName;
logger.log(ILogger::Severity::kINFO, ss.str().c_str());
}
catch (std::exception const& e)
{
std::cerr << "Exception while updating timing cache file " << fileName << ": " << e.what() << std::endl;
}
}
} // namespace nvinfer1::utils
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