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Diffstat (limited to 'profiling/server/src/basePipeServer/BasePipeServer.cpp')
| -rw-r--r-- | profiling/server/src/basePipeServer/BasePipeServer.cpp | 293 |
1 files changed, 293 insertions, 0 deletions
diff --git a/profiling/server/src/basePipeServer/BasePipeServer.cpp b/profiling/server/src/basePipeServer/BasePipeServer.cpp new file mode 100644 index 0000000000..fde5684160 --- /dev/null +++ b/profiling/server/src/basePipeServer/BasePipeServer.cpp @@ -0,0 +1,293 @@ +// +// Copyright © 2020 Arm Ltd. All rights reserved. +// SPDX-License-Identifier: MIT +// + +#include <iostream> +#include <boost/cast.hpp> +#include <vector> +#include <iomanip> +#include "BasePipeServer.hpp" + +using namespace armnnUtils; + +namespace armnnProfiling +{ + +bool BasePipeServer::ReadFromSocket(uint8_t* packetData, uint32_t expectedLength) +{ + // This is a blocking read until either expectedLength has been received or an error is detected. + long totalBytesRead = 0; + while (boost::numeric_cast<uint32_t>(totalBytesRead) < expectedLength) + { + long bytesRead = Sockets::Read(m_ClientConnection, packetData, expectedLength); + if (bytesRead < 0) + { + std::cerr << ": Failure when reading from client socket: " << strerror(errno) << std::endl; + return false; + } + if (bytesRead == 0) + { + std::cerr << ": EOF while reading from client socket." << std::endl; + return false; + } + totalBytesRead += bytesRead; + } + return true; +}; + +bool BasePipeServer::WaitForStreamMetaData() +{ + if (m_EchoPackets) + { + std::cout << "Waiting for stream meta data..." << std::endl; + } + // The start of the stream metadata is 2x32bit words, 0 and packet length. + uint8_t header[8]; + if (!ReadFromSocket(header, 8)) + { + return false; + } + EchoPacket(PacketDirection::ReceivedHeader, header, 8); + // The first word, stream_metadata_identifer, should always be 0. + if (ToUint32(&header[0], TargetEndianness::BeWire) != 0) + { + std::cerr << ": Protocol error. The stream_metadata_identifer was not 0." << std::endl; + return false; + } + + uint8_t pipeMagic[4]; + if (!ReadFromSocket(pipeMagic, 4)) + { + return false; + } + EchoPacket(PacketDirection::ReceivedData, pipeMagic, 4); + + // Before we interpret the length we need to read the pipe_magic word to determine endianness. + if (ToUint32(&pipeMagic[0], TargetEndianness::BeWire) == PIPE_MAGIC) + { + m_Endianness = TargetEndianness::BeWire; + } + else if (ToUint32(&pipeMagic[0], TargetEndianness::LeWire) == PIPE_MAGIC) + { + m_Endianness = TargetEndianness::LeWire; + } + else + { + std::cerr << ": Protocol read error. Unable to read PIPE_MAGIC value." << std::endl; + return false; + } + // Now we know the endianness we can get the length from the header. + // Remember we already read the pipe magic 4 bytes. + uint32_t metaDataLength = ToUint32(&header[4], m_Endianness) - 4; + // Read the entire packet. + std::vector<uint8_t> packetData(metaDataLength); + if (metaDataLength != + boost::numeric_cast<uint32_t>(Sockets::Read(m_ClientConnection, packetData.data(), metaDataLength))) + { + std::cerr << ": Protocol read error. Data length mismatch." << std::endl; + return false; + } + EchoPacket(PacketDirection::ReceivedData, packetData.data(), metaDataLength); + m_StreamMetaDataVersion = ToUint32(&packetData[0], m_Endianness); + m_StreamMetaDataMaxDataLen = ToUint32(&packetData[4], m_Endianness); + m_StreamMetaDataPid = ToUint32(&packetData[8], m_Endianness); + + return true; +} + +armnn::profiling::Packet BasePipeServer::WaitForPacket(uint32_t timeoutMs) +{ + // Is there currently more than a headers worth of data waiting to be read? + int bytes_available; + Sockets::Ioctl(m_ClientConnection, FIONREAD, &bytes_available); + if (bytes_available > 8) + { + // Yes there is. Read it: + return ReceivePacket(); + } + else + { + // No there's not. Poll for more data. + struct pollfd pollingFd[1]{}; + pollingFd[0].fd = m_ClientConnection; + int pollResult = Sockets::Poll(pollingFd, 1, static_cast<int>(timeoutMs)); + + switch (pollResult) + { + // Error + case -1: + throw armnn::RuntimeException(std::string("File descriptor reported an error during polling: ") + + strerror(errno)); + + // Timeout + case 0: + throw armnn::TimeoutException("Timeout while waiting to receive packet."); + + // Normal poll return. It could still contain an error signal + default: + // Check if the socket reported an error + if (pollingFd[0].revents & (POLLNVAL | POLLERR | POLLHUP)) + { + if (pollingFd[0].revents == POLLNVAL) + { + throw armnn::RuntimeException(std::string("Error while polling receiving socket: POLLNVAL")); + } + if (pollingFd[0].revents == POLLERR) + { + throw armnn::RuntimeException(std::string("Error while polling receiving socket: POLLERR: ") + + strerror(errno)); + } + if (pollingFd[0].revents == POLLHUP) + { + throw armnn::RuntimeException(std::string("Connection closed by remote client: POLLHUP")); + } + } + + // Check if there is data to read + if (!(pollingFd[0].revents & (POLLIN))) + { + // This is a corner case. The socket as been woken up but not with any data. + // We'll throw a timeout exception to loop around again. + throw armnn::TimeoutException("File descriptor was polled but no data was available to receive."); + } + return ReceivePacket(); + } + } +} + +armnn::profiling::Packet BasePipeServer::ReceivePacket() +{ + uint32_t header[2]; + if (!ReadHeader(header)) + { + return armnn::profiling::Packet(); + } + // Read data_length bytes from the socket. + std::unique_ptr<unsigned char[]> uniquePacketData = std::make_unique<unsigned char[]>(header[1]); + unsigned char* packetData = reinterpret_cast<unsigned char*>(uniquePacketData.get()); + + if (!ReadFromSocket(packetData, header[1])) + { + return armnn::profiling::Packet(); + } + + EchoPacket(PacketDirection::ReceivedData, packetData, header[1]); + + // Construct received packet + armnn::profiling::Packet packetRx = armnn::profiling::Packet(header[0], header[1], uniquePacketData); + if (m_EchoPackets) + { + std::cout << "Processing packet ID= " << packetRx.GetPacketId() << " Length=" << packetRx.GetLength() + << std::endl; + } + + return packetRx; +} + +bool BasePipeServer::SendPacket(uint32_t packetFamily, uint32_t packetId, const uint8_t* data, uint32_t dataLength) +{ + // Construct a packet from the id and data given and send it to the client. + // Encode the header. + uint32_t header[2]; + header[0] = packetFamily << 26 | packetId << 16; + header[1] = dataLength; + // Add the header to the packet. + std::vector<uint8_t> packet(8 + dataLength); + InsertU32(header[0], packet.data(), m_Endianness); + InsertU32(header[1], packet.data() + 4, m_Endianness); + // And the rest of the data if there is any. + if (dataLength > 0) + { + memcpy((packet.data() + 8), data, dataLength); + } + EchoPacket(PacketDirection::Sending, packet.data(), packet.size()); + if (-1 == armnnUtils::Sockets::Write(m_ClientConnection, packet.data(), packet.size())) + { + std::cerr << ": Failure when writing to client socket: " << strerror(errno) << std::endl; + return false; + } + return true; +} + +bool BasePipeServer::ReadHeader(uint32_t headerAsWords[2]) +{ + // The header will always be 2x32bit words. + uint8_t header[8]; + if (!ReadFromSocket(header, 8)) + { + return false; + } + EchoPacket(PacketDirection::ReceivedHeader, header, 8); + headerAsWords[0] = ToUint32(&header[0], m_Endianness); + headerAsWords[1] = ToUint32(&header[4], m_Endianness); + return true; +} + +void BasePipeServer::EchoPacket(PacketDirection direction, uint8_t* packet, size_t lengthInBytes) +{ + // If enabled print the contents of the data packet to the console. + if (m_EchoPackets) + { + if (direction == PacketDirection::Sending) + { + std::cout << "TX " << std::dec << lengthInBytes << " bytes : "; + } + else if (direction == PacketDirection::ReceivedHeader) + { + std::cout << "RX Header " << std::dec << lengthInBytes << " bytes : "; + } + else + { + std::cout << "RX Data " << std::dec << lengthInBytes << " bytes : "; + } + for (unsigned int i = 0; i < lengthInBytes; i++) + { + if ((i % 10) == 0) + { + std::cout << std::endl; + } + std::cout << "0x" << std::setfill('0') << std::setw(2) << std::hex << static_cast<unsigned int>(packet[i]) + << " "; + } + std::cout << std::endl; + } +} + +uint32_t BasePipeServer::ToUint32(uint8_t* data, TargetEndianness endianness) +{ + // Extract the first 4 bytes starting at data and push them into a 32bit integer based on the + // specified endianness. + if (endianness == TargetEndianness::BeWire) + { + return static_cast<uint32_t>(data[0]) << 24 | static_cast<uint32_t>(data[1]) << 16 | + static_cast<uint32_t>(data[2]) << 8 | static_cast<uint32_t>(data[3]); + } + else + { + return static_cast<uint32_t>(data[3]) << 24 | static_cast<uint32_t>(data[2]) << 16 | + static_cast<uint32_t>(data[1]) << 8 | static_cast<uint32_t>(data[0]); + } +} + +void BasePipeServer::InsertU32(uint32_t value, uint8_t* data, TargetEndianness endianness) +{ + // Take the bytes of a 32bit integer and copy them into char array starting at data considering + // the endianness value. + if (endianness == TargetEndianness::BeWire) + { + *data = static_cast<uint8_t>((value >> 24) & 0xFF); + *(data + 1) = static_cast<uint8_t>((value >> 16) & 0xFF); + *(data + 2) = static_cast<uint8_t>((value >> 8) & 0xFF); + *(data + 3) = static_cast<uint8_t>(value & 0xFF); + } + else + { + *(data + 3) = static_cast<uint8_t>((value >> 24) & 0xFF); + *(data + 2) = static_cast<uint8_t>((value >> 16) & 0xFF); + *(data + 1) = static_cast<uint8_t>((value >> 8) & 0xFF); + *data = static_cast<uint8_t>(value & 0xFF); + } +} + +} // namespace armnnProfiling
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