src/profiling/DirectoryCaptureCommandHandler.cpp - ml/armnn - Gitiles

 //
 // Copyright © 2019 Arm Ltd and Contributors. All rights reserved.
 // SPDX-License-Identifier: MIT
 //

 #include "DirectoryCaptureCommandHandler.hpp"

 #include <armnn/BackendId.hpp>
 #include "ProfilingUtils.hpp"

 #include <atomic>
 #include <iostream>

 namespace arm
 {

 namespace pipe
 {

 // Utils
 uint32_t uint16_t_size = sizeof(uint16_t);
 uint32_t uint32_t_size = sizeof(uint32_t);

 void DirectoryCaptureCommandHandler::ParseData(const arm::pipe::Packet& packet)
 {
     uint16_t categoryRecordCount;
     uint16_t counterSetRecordCount;
     uint16_t deviceRecordCount;

     uint32_t offset = 0;

     if (packet.GetLength() < 8)
     {
         std::cout << "Counter directory packet received." << std::endl;
         return;
     }

     const unsigned char* data = packet.GetData();
     // Body header word 0:
     // 0:15  [16] reserved: all zeros
     offset += uint16_t_size;
     // 16:31 [16] device_records_count: number of entries in the device_records_pointer_table
     deviceRecordCount = ReadUint16(data, offset);
     offset += uint16_t_size;

     // Body header word 1:
     // 0:31 [32] device_records_pointer_table_offset: offset to the device_records_pointer_table
     // The offset is always zero here, as the device record pointer table field is always the first item in the pool
     const uint32_t deviceRecordsPointerTableOffset = ReadUint32(data, offset);
     offset += uint32_t_size;

     // Body header word 2:
     // 0:15  [16] reserved: all zeros
     offset += uint16_t_size;
     // 16:31 [16] counter_set_count: number of entries in the counter_set_pointer_table
     counterSetRecordCount = ReadUint16(data, offset);
     offset += uint16_t_size;

     // Body header word 3:
     // 0:31 [32] counter_set_pointer_table_offset: offset to the counter_set_pointer_table
     const uint32_t counterPointerTableSetOffset = ReadUint32(data, offset);
     offset += uint32_t_size;

     // Body header word 4:
     // 0:15  [16] reserved: all zeros
     offset += uint16_t_size;
     // 16:31 [16] categories_count: number of entries in the categories_pointer_table
     categoryRecordCount = ReadUint16(data, offset);
     offset += uint16_t_size;

     // Body header word 5:
     // 0:31 [32] categories_pointer_table_offset: offset to the categories_pointer_table
     const uint32_t categoriesPointerTableOffset = ReadUint32(data, offset);
     offset += uint32_t_size;

     std::vector<uint32_t> deviceRecordOffsets(deviceRecordCount);
     std::vector<uint32_t> counterSetOffsets(counterSetRecordCount);
     std::vector<uint32_t> categoryOffsets(categoryRecordCount);

     offset = deviceRecordsPointerTableOffset;
     for (uint32_t i = 0; i < deviceRecordCount; ++i)
     {
         deviceRecordOffsets[i] = ReadUint32(data, offset);
         offset += uint32_t_size;
     }

     offset = counterPointerTableSetOffset;
     for (uint32_t i = 0; i < counterSetRecordCount; ++i)
     {
         counterSetOffsets[i] = ReadUint32(data, offset);
         offset += uint32_t_size;
     }

     offset = categoriesPointerTableOffset;
     for (uint32_t i = 0; i < categoryRecordCount; ++i)
     {
         categoryOffsets[i] = ReadUint32(data, offset);
         offset += uint32_t_size;
     }

     offset = deviceRecordsPointerTableOffset;
     for (uint32_t deviceIndex = 0; deviceIndex < deviceRecordCount; ++deviceIndex)
     {
         uint32_t deviceRecordOffset = offset + deviceRecordOffsets[deviceIndex];
         // Device record word 0:
         // 0:15  [16] cores: the number of individual streams of counters for one or more cores of some device
         uint16_t deviceCores = ReadUint16(data, deviceRecordOffset);
         // 16:31 [16] deviceUid: the unique identifier for the device
         deviceRecordOffset += uint16_t_size;
         uint16_t deviceUid = ReadUint16(data, deviceRecordOffset);
         deviceRecordOffset += uint16_t_size;

         // Device record word 1:
         // Offset from the beginning of the device record pool to the name field.
         uint32_t nameOffset = ReadUint32(data, deviceRecordOffset);

         deviceRecordOffset = deviceRecordsPointerTableOffset + nameOffset;

         const std::string& deviceName             = GetStringNameFromBuffer(data, deviceRecordOffset);
         const Device* registeredDevice            = m_CounterDirectory.RegisterDevice(deviceName, deviceCores);
         m_UidTranslation[registeredDevice->m_Uid] = deviceUid;
     }

     offset = counterPointerTableSetOffset;
     for (uint32_t counterSetIndex = 0; counterSetIndex < counterSetRecordCount; ++counterSetIndex)
     {
         uint32_t counterSetOffset = offset + counterSetOffsets[counterSetIndex];

         // Counter set record word 0:
         // 0:15  [16] count: the number of counters which can be active in this set at any one time
         uint16_t counterSetCount = ReadUint16(data, counterSetOffset);
         counterSetOffset += uint16_t_size;

         // 16:31 [16] deviceUid: the unique identifier for the counter_set
         uint16_t counterSetUid = ReadUint16(data, counterSetOffset);
         counterSetOffset += uint16_t_size;

         // Counter set record word 1:
         // 0:31 [32] name_offset: offset from the beginning of the counter set pool to the name field
         // The offset is always zero here, as the name field is always the first (and only) item in the pool
         counterSetOffset += uint32_t_size;
         counterSetOffset += uint32_t_size;

         auto counterSet =
             m_CounterDirectory.RegisterCounterSet(GetStringNameFromBuffer(data, counterSetOffset), counterSetCount);
         m_UidTranslation[counterSet->m_Uid] = counterSetUid;
     }
     ReadCategoryRecords(data, categoriesPointerTableOffset, categoryOffsets);
 }

 void DirectoryCaptureCommandHandler::ReadCategoryRecords(const unsigned char* const data,
                                                          uint32_t offset,
                                                          std::vector<uint32_t> categoryOffsets)
 {
     uint32_t categoryRecordCount = static_cast<uint32_t>(categoryOffsets.size());

     for (uint32_t categoryIndex = 0; categoryIndex < categoryRecordCount; ++categoryIndex)
     {
         uint32_t categoryRecordOffset = offset + categoryOffsets[categoryIndex];

         // Category record word 1:
         // 0:15 Reserved, value 0x0000.
         categoryRecordOffset += uint16_t_size;
         // 16:31 Number of events belonging to this category.
         uint32_t eventCount = ReadUint16(data, categoryRecordOffset);
         categoryRecordOffset += uint16_t_size;

         // Category record word 2
         // 0:31  Offset from the beginning of the category data pool to the event_pointer_table
         uint32_t eventPointerTableOffset = ReadUint32(data, categoryRecordOffset);
         categoryRecordOffset += uint32_t_size;

         // Category record word 3
         // 0:31 Offset from the beginning of the category data pool to the name field.
         uint32_t nameOffset = ReadUint32(data, categoryRecordOffset);
         categoryRecordOffset += uint32_t_size;

         std::vector<uint32_t> eventRecordsOffsets(eventCount);

         eventPointerTableOffset += offset + categoryOffsets[categoryIndex];

         for (uint32_t eventIndex = 0; eventIndex < eventCount; ++eventIndex)
         {
             eventRecordsOffsets[eventIndex] =
                 ReadUint32(data, eventPointerTableOffset + uint32_t_size * eventIndex);
         }

         const std::vector<CounterDirectoryEventRecord>& eventRecords =
             ReadEventRecords(data, eventPointerTableOffset, eventRecordsOffsets);

         const Category* category = m_CounterDirectory.RegisterCategory(
             GetStringNameFromBuffer(data, offset + categoryOffsets[categoryIndex] + nameOffset + uint32_t_size));
         for (auto& counter : eventRecords)
         {
             const Counter* registeredCounter = m_CounterDirectory.RegisterCounter(armnn::profiling::BACKEND_ID,
                                                                                   counter.m_CounterUid,
                                                                                   category->m_Name,
                                                                                   counter.m_CounterClass,
                                                                                   counter.m_CounterInterpolation,
                                                                                   counter.m_CounterMultiplier,
                                                                                   counter.m_CounterName,
                                                                                   counter.m_CounterDescription,
                                                                                   counter.m_CounterUnits);
             m_UidTranslation[registeredCounter->m_Uid] = counter.m_CounterUid;
         }
     }
 }

 std::vector<CounterDirectoryEventRecord> DirectoryCaptureCommandHandler::ReadEventRecords(
     const unsigned char* data, uint32_t offset, std::vector<uint32_t> eventRecordsOffsets)
 {
     uint32_t eventCount = static_cast<uint32_t>(eventRecordsOffsets.size());

     std::vector<CounterDirectoryEventRecord> eventRecords(eventCount);
     for (unsigned long i = 0; i < eventCount; ++i)
     {
         uint32_t eventRecordOffset = eventRecordsOffsets[i] + offset;

         // Event record word 0:
         // 0:15  [16] count_uid: unique ID for the counter. Must be unique across all counters in all categories
         eventRecords[i].m_CounterUid = ReadUint16(data, eventRecordOffset);
         eventRecordOffset += uint16_t_size;
         // 16:31 [16] max_counter_uid: if the device this event is associated with has more than one core and there
         //                             is one of these counters per core this value will be set to
         //                             (counter_uid + cores (from device_record)) - 1.
         //                             If there is only a single core then this value will be the same as
         //                             the counter_uid value
         eventRecords[i].m_MaxCounterUid = ReadUint16(data, eventRecordOffset);
         eventRecordOffset += uint16_t_size;

         // Event record word 1:
         // 0:15  [16] counter_set: UID of the counter_set this event is associated with. Set to zero if the event
         //                         is NOT associated with a counter_set
         eventRecords[i].m_CounterSetUid  = ReadUint16(data, eventRecordOffset);
         eventRecordOffset += uint16_t_size;

         // 16:31 [16] device: UID of the device this event is associated with. Set to zero if the event is NOT
         //                    associated with a device
         eventRecords[i].m_DeviceUid = ReadUint16(data, eventRecordOffset);
         eventRecordOffset += uint16_t_size;

         // Event record word 2:
         // 0:15  [16] interpolation: type describing how to interpolate each data point in a stream of data points
         eventRecords[i].m_CounterInterpolation = ReadUint16(data, eventRecordOffset);
         eventRecordOffset += uint16_t_size;

         // 16:31 [16] class: type describing how to treat each data point in a stream of data points
         eventRecords[i].m_CounterClass = ReadUint16(data, eventRecordOffset);
         eventRecordOffset += uint16_t_size;

         // Event record word 3-4:
         // 0:63 [64] multiplier: internal data stream is represented as integer values, this allows scaling of
         //                       those values as if they are fixed point numbers. Zero is not a valid value
         uint32_t multiplier[2] = { 0u, 0u };

         multiplier[0] = ReadUint32(data, eventRecordOffset);
         eventRecordOffset += uint32_t_size;
         multiplier[1] = ReadUint32(data, eventRecordOffset);
         eventRecordOffset += uint32_t_size;

         std::memcpy(&eventRecords[i].m_CounterMultiplier, &multiplier, sizeof(multiplier));

         // Event record word 5:
         // 0:31 [32] name_eventRecordOffset: eventRecordOffset from the
         // beginning of the event record pool to the name field
         // The eventRecordOffset is always zero here, as the name field is always the first item in the pool
         uint32_t nameOffset = ReadUint32(data, eventRecordOffset);
         eventRecordOffset += uint32_t_size;

         // Event record word 6:
         // 0:31 [32] description_eventRecordOffset: eventRecordOffset from the
         // beginning of the event record pool to the description field
         // The size of the name buffer in bytes
         uint32_t descriptionOffset = ReadUint32(data, eventRecordOffset);
         eventRecordOffset += uint32_t_size;

         // Event record word 7:
         // 0:31 [32] units_eventRecordOffset: (optional) eventRecordOffset from the
         // beginning of the event record pool to the units field.
         // An eventRecordOffset value of zero indicates this field is not provided
         uint32_t unitsOffset = ReadUint32(data, eventRecordOffset);

         eventRecords[i].m_CounterName = GetStringNameFromBuffer(data, offset +
                                                                       eventRecordsOffsets[i] +
                                                                       nameOffset +
                                                                       uint32_t_size);

         eventRecords[i].m_CounterDescription = GetStringNameFromBuffer(data, offset +
                                                                              eventRecordsOffsets[i] +
                                                                              descriptionOffset +
                                                                              uint32_t_size);

         eventRecords[i].m_CounterUnits = unitsOffset == 0 ? armnn::Optional<std::string>() :
                 GetStringNameFromBuffer(data, eventRecordsOffsets[i] + offset + unitsOffset + uint32_t_size);
     }

     return eventRecords;
 }

 void DirectoryCaptureCommandHandler::operator()(const arm::pipe::Packet& packet)
 {
     if (!m_QuietOperation)    // Are we supposed to print to stdout?
     {
         std::cout << "Counter directory packet received." << std::endl;
     }

     // The ArmNN counter directory is static per ArmNN instance. Ensure we don't parse it a second time.
     if (!ParsedCounterDirectory())
     {
         ParseData(packet);
         m_AlreadyParsed = true;
     }

     if (!m_QuietOperation)
     {
         PrintCounterDirectory(m_CounterDirectory);
     }
 }

 const ICounterDirectory& DirectoryCaptureCommandHandler::GetCounterDirectory() const
 {
     return m_CounterDirectory;
 }

 std::string DirectoryCaptureCommandHandler::GetStringNameFromBuffer(const unsigned char* const data, uint32_t offset)
 {
     std::string deviceName;
     uint8_t nextChar = ReadUint8(data, offset);

     while (isprint(nextChar))
     {
         deviceName += static_cast<char>(nextChar);
         offset++;
         nextChar = ReadUint8(data, offset);
     }

     return deviceName;
 }

 }    // namespace pipe

 }    // namespace arm
	//
	// Copyright © 2019 Arm Ltd and Contributors. All rights reserved.
	// SPDX-License-Identifier: MIT
	//

	#include "DirectoryCaptureCommandHandler.hpp"

	#include <armnn/BackendId.hpp>
	#include "ProfilingUtils.hpp"

	#include <atomic>
	#include <iostream>

	namespace arm
	{

	namespace pipe
	{

	// Utils
	uint32_t uint16_t_size = sizeof(uint16_t);
	uint32_t uint32_t_size = sizeof(uint32_t);

	void DirectoryCaptureCommandHandler::ParseData(const arm::pipe::Packet& packet)
	{
	uint16_t categoryRecordCount;
	uint16_t counterSetRecordCount;
	uint16_t deviceRecordCount;

	uint32_t offset = 0;

	if (packet.GetLength() < 8)
	{
	std::cout << "Counter directory packet received." << std::endl;
	return;
	}

	const unsigned char* data = packet.GetData();
	// Body header word 0:
	// 0:15 [16] reserved: all zeros
	offset += uint16_t_size;
	// 16:31 [16] device_records_count: number of entries in the device_records_pointer_table
	deviceRecordCount = ReadUint16(data, offset);
	offset += uint16_t_size;

	// Body header word 1:
	// 0:31 [32] device_records_pointer_table_offset: offset to the device_records_pointer_table
	// The offset is always zero here, as the device record pointer table field is always the first item in the pool
	const uint32_t deviceRecordsPointerTableOffset = ReadUint32(data, offset);
	offset += uint32_t_size;

	// Body header word 2:
	// 0:15 [16] reserved: all zeros
	offset += uint16_t_size;
	// 16:31 [16] counter_set_count: number of entries in the counter_set_pointer_table
	counterSetRecordCount = ReadUint16(data, offset);
	offset += uint16_t_size;

	// Body header word 3:
	// 0:31 [32] counter_set_pointer_table_offset: offset to the counter_set_pointer_table
	const uint32_t counterPointerTableSetOffset = ReadUint32(data, offset);
	offset += uint32_t_size;

	// Body header word 4:
	// 0:15 [16] reserved: all zeros
	offset += uint16_t_size;
	// 16:31 [16] categories_count: number of entries in the categories_pointer_table
	categoryRecordCount = ReadUint16(data, offset);
	offset += uint16_t_size;

	// Body header word 5:
	// 0:31 [32] categories_pointer_table_offset: offset to the categories_pointer_table
	const uint32_t categoriesPointerTableOffset = ReadUint32(data, offset);
	offset += uint32_t_size;

	std::vector<uint32_t> deviceRecordOffsets(deviceRecordCount);
	std::vector<uint32_t> counterSetOffsets(counterSetRecordCount);
	std::vector<uint32_t> categoryOffsets(categoryRecordCount);

	offset = deviceRecordsPointerTableOffset;
	for (uint32_t i = 0; i < deviceRecordCount; ++i)
	{
	deviceRecordOffsets[i] = ReadUint32(data, offset);
	offset += uint32_t_size;
	}

	offset = counterPointerTableSetOffset;
	for (uint32_t i = 0; i < counterSetRecordCount; ++i)
	{
	counterSetOffsets[i] = ReadUint32(data, offset);
	offset += uint32_t_size;
	}

	offset = categoriesPointerTableOffset;
	for (uint32_t i = 0; i < categoryRecordCount; ++i)
	{
	categoryOffsets[i] = ReadUint32(data, offset);
	offset += uint32_t_size;
	}

	offset = deviceRecordsPointerTableOffset;
	for (uint32_t deviceIndex = 0; deviceIndex < deviceRecordCount; ++deviceIndex)
	{
	uint32_t deviceRecordOffset = offset + deviceRecordOffsets[deviceIndex];
	// Device record word 0:
	// 0:15 [16] cores: the number of individual streams of counters for one or more cores of some device
	uint16_t deviceCores = ReadUint16(data, deviceRecordOffset);
	// 16:31 [16] deviceUid: the unique identifier for the device
	deviceRecordOffset += uint16_t_size;
	uint16_t deviceUid = ReadUint16(data, deviceRecordOffset);
	deviceRecordOffset += uint16_t_size;

	// Device record word 1:
	// Offset from the beginning of the device record pool to the name field.
	uint32_t nameOffset = ReadUint32(data, deviceRecordOffset);

	deviceRecordOffset = deviceRecordsPointerTableOffset + nameOffset;

	const std::string& deviceName = GetStringNameFromBuffer(data, deviceRecordOffset);
	const Device* registeredDevice = m_CounterDirectory.RegisterDevice(deviceName, deviceCores);
	m_UidTranslation[registeredDevice->m_Uid] = deviceUid;
	}

	offset = counterPointerTableSetOffset;
	for (uint32_t counterSetIndex = 0; counterSetIndex < counterSetRecordCount; ++counterSetIndex)
	{
	uint32_t counterSetOffset = offset + counterSetOffsets[counterSetIndex];

	// Counter set record word 0:
	// 0:15 [16] count: the number of counters which can be active in this set at any one time
	uint16_t counterSetCount = ReadUint16(data, counterSetOffset);
	counterSetOffset += uint16_t_size;

	// 16:31 [16] deviceUid: the unique identifier for the counter_set
	uint16_t counterSetUid = ReadUint16(data, counterSetOffset);
	counterSetOffset += uint16_t_size;

	// Counter set record word 1:
	// 0:31 [32] name_offset: offset from the beginning of the counter set pool to the name field
	// The offset is always zero here, as the name field is always the first (and only) item in the pool
	counterSetOffset += uint32_t_size;
	counterSetOffset += uint32_t_size;

	auto counterSet =
	m_CounterDirectory.RegisterCounterSet(GetStringNameFromBuffer(data, counterSetOffset), counterSetCount);
	m_UidTranslation[counterSet->m_Uid] = counterSetUid;
	}
	ReadCategoryRecords(data, categoriesPointerTableOffset, categoryOffsets);
	}

	void DirectoryCaptureCommandHandler::ReadCategoryRecords(const unsigned char* const data,
	uint32_t offset,
	std::vector<uint32_t> categoryOffsets)
	{
	uint32_t categoryRecordCount = static_cast<uint32_t>(categoryOffsets.size());

	for (uint32_t categoryIndex = 0; categoryIndex < categoryRecordCount; ++categoryIndex)
	{
	uint32_t categoryRecordOffset = offset + categoryOffsets[categoryIndex];

	// Category record word 1:
	// 0:15 Reserved, value 0x0000.
	categoryRecordOffset += uint16_t_size;
	// 16:31 Number of events belonging to this category.
	uint32_t eventCount = ReadUint16(data, categoryRecordOffset);
	categoryRecordOffset += uint16_t_size;

	// Category record word 2
	// 0:31 Offset from the beginning of the category data pool to the event_pointer_table
	uint32_t eventPointerTableOffset = ReadUint32(data, categoryRecordOffset);
	categoryRecordOffset += uint32_t_size;

	// Category record word 3
	// 0:31 Offset from the beginning of the category data pool to the name field.
	uint32_t nameOffset = ReadUint32(data, categoryRecordOffset);
	categoryRecordOffset += uint32_t_size;

	std::vector<uint32_t> eventRecordsOffsets(eventCount);

	eventPointerTableOffset += offset + categoryOffsets[categoryIndex];

	for (uint32_t eventIndex = 0; eventIndex < eventCount; ++eventIndex)
	{
	eventRecordsOffsets[eventIndex] =
	ReadUint32(data, eventPointerTableOffset + uint32_t_size * eventIndex);
	}

	const std::vector<CounterDirectoryEventRecord>& eventRecords =
	ReadEventRecords(data, eventPointerTableOffset, eventRecordsOffsets);

	const Category* category = m_CounterDirectory.RegisterCategory(
	GetStringNameFromBuffer(data, offset + categoryOffsets[categoryIndex] + nameOffset + uint32_t_size));
	for (auto& counter : eventRecords)
	{
	const Counter* registeredCounter = m_CounterDirectory.RegisterCounter(armnn::profiling::BACKEND_ID,
	counter.m_CounterUid,
	category->m_Name,
	counter.m_CounterClass,
	counter.m_CounterInterpolation,
	counter.m_CounterMultiplier,
	counter.m_CounterName,
	counter.m_CounterDescription,
	counter.m_CounterUnits);
	m_UidTranslation[registeredCounter->m_Uid] = counter.m_CounterUid;
	}
	}
	}

	std::vector<CounterDirectoryEventRecord> DirectoryCaptureCommandHandler::ReadEventRecords(
	const unsigned char* data, uint32_t offset, std::vector<uint32_t> eventRecordsOffsets)
	{
	uint32_t eventCount = static_cast<uint32_t>(eventRecordsOffsets.size());

	std::vector<CounterDirectoryEventRecord> eventRecords(eventCount);
	for (unsigned long i = 0; i < eventCount; ++i)
	{
	uint32_t eventRecordOffset = eventRecordsOffsets[i] + offset;

	// Event record word 0:
	// 0:15 [16] count_uid: unique ID for the counter. Must be unique across all counters in all categories
	eventRecords[i].m_CounterUid = ReadUint16(data, eventRecordOffset);
	eventRecordOffset += uint16_t_size;
	// 16:31 [16] max_counter_uid: if the device this event is associated with has more than one core and there
	// is one of these counters per core this value will be set to
	// (counter_uid + cores (from device_record)) - 1.
	// If there is only a single core then this value will be the same as
	// the counter_uid value
	eventRecords[i].m_MaxCounterUid = ReadUint16(data, eventRecordOffset);
	eventRecordOffset += uint16_t_size;

	// Event record word 1:
	// 0:15 [16] counter_set: UID of the counter_set this event is associated with. Set to zero if the event
	// is NOT associated with a counter_set
	eventRecords[i].m_CounterSetUid = ReadUint16(data, eventRecordOffset);
	eventRecordOffset += uint16_t_size;

	// 16:31 [16] device: UID of the device this event is associated with. Set to zero if the event is NOT
	// associated with a device
	eventRecords[i].m_DeviceUid = ReadUint16(data, eventRecordOffset);
	eventRecordOffset += uint16_t_size;

	// Event record word 2:
	// 0:15 [16] interpolation: type describing how to interpolate each data point in a stream of data points
	eventRecords[i].m_CounterInterpolation = ReadUint16(data, eventRecordOffset);
	eventRecordOffset += uint16_t_size;

	// 16:31 [16] class: type describing how to treat each data point in a stream of data points
	eventRecords[i].m_CounterClass = ReadUint16(data, eventRecordOffset);
	eventRecordOffset += uint16_t_size;

	// Event record word 3-4:
	// 0:63 [64] multiplier: internal data stream is represented as integer values, this allows scaling of
	// those values as if they are fixed point numbers. Zero is not a valid value
	uint32_t multiplier[2] = { 0u, 0u };

	multiplier[0] = ReadUint32(data, eventRecordOffset);
	eventRecordOffset += uint32_t_size;
	multiplier[1] = ReadUint32(data, eventRecordOffset);
	eventRecordOffset += uint32_t_size;

	std::memcpy(&eventRecords[i].m_CounterMultiplier, &multiplier, sizeof(multiplier));

	// Event record word 5:
	// 0:31 [32] name_eventRecordOffset: eventRecordOffset from the
	// beginning of the event record pool to the name field
	// The eventRecordOffset is always zero here, as the name field is always the first item in the pool
	uint32_t nameOffset = ReadUint32(data, eventRecordOffset);
	eventRecordOffset += uint32_t_size;

	// Event record word 6:
	// 0:31 [32] description_eventRecordOffset: eventRecordOffset from the
	// beginning of the event record pool to the description field
	// The size of the name buffer in bytes
	uint32_t descriptionOffset = ReadUint32(data, eventRecordOffset);
	eventRecordOffset += uint32_t_size;

	// Event record word 7:
	// 0:31 [32] units_eventRecordOffset: (optional) eventRecordOffset from the
	// beginning of the event record pool to the units field.
	// An eventRecordOffset value of zero indicates this field is not provided
	uint32_t unitsOffset = ReadUint32(data, eventRecordOffset);

	eventRecords[i].m_CounterName = GetStringNameFromBuffer(data, offset +
	eventRecordsOffsets[i] +
	nameOffset +
	uint32_t_size);

	eventRecords[i].m_CounterDescription = GetStringNameFromBuffer(data, offset +
	eventRecordsOffsets[i] +
	descriptionOffset +
	uint32_t_size);

	eventRecords[i].m_CounterUnits = unitsOffset == 0 ? armnn::Optional<std::string>() :
	GetStringNameFromBuffer(data, eventRecordsOffsets[i] + offset + unitsOffset + uint32_t_size);
	}

	return eventRecords;
	}

	void DirectoryCaptureCommandHandler::operator()(const arm::pipe::Packet& packet)
	{
	if (!m_QuietOperation) // Are we supposed to print to stdout?
	{
	std::cout << "Counter directory packet received." << std::endl;
	}

	// The ArmNN counter directory is static per ArmNN instance. Ensure we don't parse it a second time.
	if (!ParsedCounterDirectory())
	{
	ParseData(packet);
	m_AlreadyParsed = true;
	}

	if (!m_QuietOperation)
	{
	PrintCounterDirectory(m_CounterDirectory);
	}
	}

	const ICounterDirectory& DirectoryCaptureCommandHandler::GetCounterDirectory() const
	{
	return m_CounterDirectory;
	}

	std::string DirectoryCaptureCommandHandler::GetStringNameFromBuffer(const unsigned char* const data, uint32_t offset)
	{
	std::string deviceName;
	uint8_t nextChar = ReadUint8(data, offset);

	while (isprint(nextChar))
	{
	deviceName += static_cast<char>(nextChar);
	offset++;
	nextChar = ReadUint8(data, offset);
	}

	return deviceName;
	}

	} // namespace pipe

	} // namespace arm