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//
// Copyright © 2017 Arm Ltd. All rights reserved.
// SPDX-License-Identifier: MIT
//
#include "ClBackendContext.hpp"
#include "ClContextControl.hpp"
#include <boost/log/trivial.hpp>
#ifdef ARMCOMPUTECL_ENABLED
#include <arm_compute/core/CL/OpenCL.h>
#include <arm_compute/core/CL/CLKernelLibrary.h>
#include <arm_compute/runtime/CL/CLScheduler.h>
#endif
namespace armnn
{
struct ClBackendContext::ClContextControlWrapper
{
ClContextControlWrapper(IGpuAccTunedParameters* clTunedParameters,
bool profilingEnabled)
: m_ClContextControl(clTunedParameters, profilingEnabled)
{}
bool Sync()
{
#ifdef ARMCOMPUTECL_ENABLED
if (arm_compute::CLScheduler::get().context()() != NULL)
{
// Waits for all queued CL requests to finish before unloading the network they may be using.
try
{
// Coverity fix: arm_compute::CLScheduler::sync() may throw an exception of type cl::Error.
arm_compute::CLScheduler::get().sync();
}
catch (const cl::Error&)
{
BOOST_LOG_TRIVIAL(warning) << "WARNING: Runtime::UnloadNetwork(): an error occurred while waiting for "
"the queued CL requests to finish";
return false;
}
}
#endif
return true;
}
void ClearClCache()
{
#ifdef ARMCOMPUTECL_ENABLED
if (arm_compute::CLScheduler::get().context()() != NULL)
{
// There are no loaded networks left, so clear the CL cache to free up memory
m_ClContextControl.ClearClCache();
}
#endif
}
ClContextControl m_ClContextControl;
};
ClBackendContext::ClBackendContext(const IRuntime::CreationOptions& options)
: IBackendContext(options)
, m_ClContextControlWrapper(
std::make_unique<ClContextControlWrapper>(options.m_GpuAccTunedParameters.get(),
options.m_EnableGpuProfiling))
{
}
bool ClBackendContext::BeforeLoadNetwork(NetworkId)
{
return true;
}
bool ClBackendContext::AfterLoadNetwork(NetworkId networkId)
{
{
std::lock_guard<std::mutex> lockGuard(m_Mutex);
m_NetworkIds.insert(networkId);
}
return true;
}
bool ClBackendContext::BeforeUnloadNetwork(NetworkId)
{
return m_ClContextControlWrapper->Sync();
}
bool ClBackendContext::AfterUnloadNetwork(NetworkId networkId)
{
bool clearCache = false;
{
std::lock_guard<std::mutex> lockGuard(m_Mutex);
m_NetworkIds.erase(networkId);
clearCache = m_NetworkIds.empty();
}
if (clearCache)
{
m_ClContextControlWrapper->ClearClCache();
}
return true;
}
ClBackendContext::~ClBackendContext()
{
}
} // namespace armnn
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