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//
// Copyright © 2019 Arm Ltd. All rights reserved.
// SPDX-License-Identifier: MIT
//
#include "PeriodicCounterCapture.hpp"
#include <armnn/Logging.hpp>
#include <iostream>
namespace armnn
{
namespace profiling
{
void PeriodicCounterCapture::Start()
{
// Check if the capture thread is already running
if (m_IsRunning)
{
// The capture thread is already running
return;
}
// Mark the capture thread as running
m_IsRunning = true;
// Keep the capture procedure going until the capture thread is signalled to stop
m_KeepRunning.store(true);
// Start the new capture thread.
m_PeriodCaptureThread = std::thread(&PeriodicCounterCapture::Capture, this, std::ref(m_ReadCounterValues));
}
void PeriodicCounterCapture::Stop()
{
// Signal the capture thread to stop
m_KeepRunning.store(false);
// Check that the capture thread is running
if (m_PeriodCaptureThread.joinable())
{
// Wait for the capture thread to complete operations
m_PeriodCaptureThread.join();
}
// Mark the capture thread as not running
m_IsRunning = false;
}
CaptureData PeriodicCounterCapture::ReadCaptureData()
{
return m_CaptureDataHolder.GetCaptureData();
}
void PeriodicCounterCapture::Capture(const IReadCounterValues& readCounterValues)
{
do
{
// Check if the current capture data indicates that there's data capture
auto currentCaptureData = ReadCaptureData();
const std::vector<uint16_t>& counterIds = currentCaptureData.GetCounterIds();
if (currentCaptureData.GetCapturePeriod() == 0 || counterIds.empty())
{
// No data capture, wait the indicated capture period (milliseconds)
std::this_thread::sleep_for(std::chrono::milliseconds(5));
continue;
}
std::vector<std::pair<uint16_t, uint32_t>> values;
auto numCounters = counterIds.size();
values.reserve(numCounters);
// Create a vector of pairs of CounterIndexes and Values
for (uint16_t index = 0; index < numCounters; ++index)
{
auto requestedId = counterIds[index];
uint32_t counterValue = 0;
try
{
counterValue = readCounterValues.GetCounterValue(requestedId);
}
catch (const Exception& e)
{
// Report the error and continue
ARMNN_LOG(warning) << "An error has occurred when getting a counter value: "
<< e.what();
continue;
}
values.emplace_back(std::make_pair(requestedId, counterValue));
}
// Take a timestamp
uint64_t timestamp = GetTimestamp();
// Write a Periodic Counter Capture packet to the Counter Stream Buffer
m_SendCounterPacket.SendPeriodicCounterCapturePacket(timestamp, values);
// Wait the indicated capture period (microseconds)
std::this_thread::sleep_for(std::chrono::microseconds(currentCaptureData.GetCapturePeriod()));
}
while (m_KeepRunning.load());
}
} // namespace profiling
} // namespace armnn
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