883 lines
28 KiB
Rust
883 lines
28 KiB
Rust
//! TCP fallback backend for distributed training
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//!
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//! This module provides a pure TCP-based communication backend for environments
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//! without NCCL/RCCL support. It implements collective operations over TCP sockets.
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use crate::backend::BackendConfig;
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use crate::comm::ReduceOp;
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use crate::error::{DistributedError, Result};
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use serde::{Deserialize, Serialize};
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use std::collections::HashMap;
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use std::net::SocketAddr;
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use std::sync::Arc;
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use std::time::{Duration, Instant};
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use tokio::io::{AsyncReadExt, AsyncWriteExt};
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use tokio::net::{TcpListener, TcpStream};
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use tokio::sync::{RwLock, mpsc, oneshot};
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/// TCP backend configuration
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#[derive(Debug, Clone)]
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pub struct TcpConfig {
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/// Base port for TCP connections
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pub base_port: u16,
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/// Connection timeout
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pub timeout: Duration,
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/// Buffer size for TCP operations
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pub buffer_size: usize,
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/// Enable TCP_NODELAY
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pub nodelay: bool,
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/// Enable TCP keepalive
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pub keepalive: bool,
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/// Network interface to bind to
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pub bind_address: String,
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}
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impl Default for TcpConfig {
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fn default() -> Self {
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Self {
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base_port: 29503,
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timeout: Duration::from_secs(30),
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buffer_size: 65536,
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nodelay: true,
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keepalive: true,
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bind_address: "0.0.0.0".to_string(),
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}
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}
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}
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impl TcpConfig {
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/// Create from BackendConfig
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pub fn from_backend_config(config: &BackendConfig) -> Self {
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let mut tcp_config = Self::default();
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if let Some(port) = config.tcp_port {
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tcp_config.base_port = port;
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}
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tcp_config.timeout = config.timeout;
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if let Some(buf_size) = config.get_parameter("tcp_buffer_size") {
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if let Ok(size) = buf_size.parse() {
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tcp_config.buffer_size = size;
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}
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}
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if let Some(nodelay) = config.get_parameter("tcp_nodelay") {
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tcp_config.nodelay = nodelay == "true";
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}
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if let Some(keepalive) = config.get_parameter("tcp_keepalive") {
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tcp_config.keepalive = keepalive == "true";
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}
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if let Some(interface) = &config.network_interface {
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tcp_config.bind_address = interface.clone();
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}
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tcp_config
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}
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}
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/// Message types for TCP communication
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#[derive(Debug, Clone, Serialize, Deserialize)]
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enum TcpMessage {
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/// AllReduce operation
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AllReduce {
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data: Vec<f32>,
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op: SerializableReduceOp,
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},
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/// AllReduce response
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AllReduceResponse { data: Vec<f32> },
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/// Broadcast operation
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Broadcast { data: Vec<f32>, root: usize },
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/// AllGather operation
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AllGather { data: Vec<f32> },
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/// AllGather response
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AllGatherResponse { data: Vec<f32> },
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/// ReduceScatter operation
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ReduceScatter {
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data: Vec<f32>,
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op: SerializableReduceOp,
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},
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/// Send operation
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Send { data: Vec<f32>, src: usize },
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/// Barrier synchronization
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Barrier,
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/// Acknowledgment
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Ack,
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/// Shutdown signal
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Shutdown,
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}
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impl TcpMessage {
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/// Get message type ID for framing
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fn type_id(&self) -> u8 {
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match self {
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TcpMessage::AllReduce { .. } => 1,
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TcpMessage::AllReduceResponse { .. } => 2,
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TcpMessage::Broadcast { .. } => 3,
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TcpMessage::AllGather { .. } => 4,
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TcpMessage::AllGatherResponse { .. } => 5,
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TcpMessage::ReduceScatter { .. } => 6,
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TcpMessage::Send { .. } => 7,
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TcpMessage::Barrier => 8,
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TcpMessage::Ack => 9,
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TcpMessage::Shutdown => 10,
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}
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}
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}
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/// Serializable version of ReduceOp
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#[derive(Debug, Clone, Copy, Serialize, Deserialize)]
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pub enum SerializableReduceOp {
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Sum,
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Product,
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Min,
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Max,
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}
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impl From<ReduceOp> for SerializableReduceOp {
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fn from(op: ReduceOp) -> Self {
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match op {
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ReduceOp::Sum => Self::Sum,
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ReduceOp::Product => Self::Product,
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ReduceOp::Min => Self::Min,
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ReduceOp::Max => Self::Max,
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_ => Self::Sum, // Default fallback for boolean/bitwise ops
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}
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}
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}
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// =============================================================================
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// Message Framing
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// =============================================================================
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/// Message header for TCP framing
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#[derive(Debug, Clone, Copy)]
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struct MessageHeader {
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/// Message length in bytes
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length: u32,
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/// Message type
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msg_type: u8,
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}
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impl MessageHeader {
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const HEADER_SIZE: usize = 5; // 4 bytes length + 1 byte type
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fn to_bytes(&self) -> [u8; Self::HEADER_SIZE] {
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let mut buf = [0u8; Self::HEADER_SIZE];
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buf[0..4].copy_from_slice(&self.length.to_le_bytes());
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buf[4] = self.msg_type;
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buf
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}
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fn from_bytes(buf: &[u8; Self::HEADER_SIZE]) -> Self {
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Self {
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length: u32::from_le_bytes([buf[0], buf[1], buf[2], buf[3]]),
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msg_type: buf[4],
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}
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}
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}
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/// Send a framed message over TCP
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async fn send_message(stream: &mut TcpStream, msg: &TcpMessage) -> Result<()> {
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let data = bincode::serialize(msg)
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.map_err(|e| DistributedError::communication("tcp", format!("Serialize failed: {}", e)))?;
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let header = MessageHeader {
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length: data.len() as u32,
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msg_type: msg.type_id(),
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};
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stream.write_all(&header.to_bytes()).await.map_err(|e| {
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DistributedError::communication("tcp", format!("Write header failed: {}", e))
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})?;
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stream
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.write_all(&data)
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.await
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.map_err(|e| DistributedError::communication("tcp", format!("Write data failed: {}", e)))?;
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stream
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.flush()
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.await
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.map_err(|e| DistributedError::communication("tcp", format!("Flush failed: {}", e)))?;
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Ok(())
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}
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/// Receive a framed message from TCP
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async fn recv_message(stream: &mut TcpStream) -> Result<TcpMessage> {
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let mut header_buf = [0u8; MessageHeader::HEADER_SIZE];
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stream.read_exact(&mut header_buf).await.map_err(|e| {
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DistributedError::communication("tcp", format!("Read header failed: {}", e))
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})?;
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let header = MessageHeader::from_bytes(&header_buf);
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let mut data = vec![0u8; header.length as usize];
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stream
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.read_exact(&mut data)
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.await
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.map_err(|e| DistributedError::communication("tcp", format!("Read data failed: {}", e)))?;
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bincode::deserialize(&data)
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.map_err(|e| DistributedError::communication("tcp", format!("Deserialize failed: {}", e)))
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}
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/// Send raw f32 data over TCP with length prefix
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async fn send_f32_data(stream: &mut TcpStream, data: &[f32]) -> Result<()> {
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let len = data.len() as u32;
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stream.write_all(&len.to_le_bytes()).await.map_err(|e| {
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DistributedError::communication("tcp", format!("Write length failed: {}", e))
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})?;
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// Convert f32 to bytes
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let bytes: Vec<u8> = data.iter().flat_map(|f| f.to_le_bytes()).collect();
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stream
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.write_all(&bytes)
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.await
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.map_err(|e| DistributedError::communication("tcp", format!("Write data failed: {}", e)))?;
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stream
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.flush()
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.await
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.map_err(|e| DistributedError::communication("tcp", format!("Flush failed: {}", e)))?;
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Ok(())
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}
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/// Receive raw f32 data from TCP with length prefix
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async fn recv_f32_data(stream: &mut TcpStream) -> Result<Vec<f32>> {
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let mut len_buf = [0u8; 4];
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stream.read_exact(&mut len_buf).await.map_err(|e| {
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DistributedError::communication("tcp", format!("Read length failed: {}", e))
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})?;
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let len = u32::from_le_bytes(len_buf) as usize;
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let mut bytes = vec![0u8; len * 4];
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stream
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.read_exact(&mut bytes)
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.await
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.map_err(|e| DistributedError::communication("tcp", format!("Read data failed: {}", e)))?;
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let data: Vec<f32> = bytes
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.chunks_exact(4)
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.map(|chunk| f32::from_le_bytes([chunk[0], chunk[1], chunk[2], chunk[3]]))
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.collect();
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Ok(data)
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}
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// =============================================================================
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// Peer Connection
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// =============================================================================
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/// Peer connection state
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struct PeerConnection {
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stream: tokio::sync::Mutex<TcpStream>,
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addr: SocketAddr,
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}
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impl std::fmt::Debug for PeerConnection {
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fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
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f.debug_struct("PeerConnection")
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.field("addr", &self.addr)
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.finish()
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}
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}
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impl PeerConnection {
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fn new(stream: TcpStream, addr: SocketAddr) -> Self {
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Self {
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stream: tokio::sync::Mutex::new(stream),
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addr,
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}
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}
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async fn send_data(&self, data: &[f32]) -> Result<()> {
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let mut stream = self.stream.lock().await;
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send_f32_data(&mut stream, data).await
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}
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async fn recv_data(&self) -> Result<Vec<f32>> {
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let mut stream = self.stream.lock().await;
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recv_f32_data(&mut stream).await
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}
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async fn send_message(&self, msg: &TcpMessage) -> Result<()> {
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let mut stream = self.stream.lock().await;
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send_message(&mut stream, msg).await
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}
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async fn recv_message(&self) -> Result<TcpMessage> {
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let mut stream = self.stream.lock().await;
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recv_message(&mut stream).await
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}
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}
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/// Command sent to the TCP worker thread
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enum TcpCommand {
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AllReduce {
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data: Vec<f32>,
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op: ReduceOp,
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resp: oneshot::Sender<Result<Vec<f32>>>,
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},
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Broadcast {
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data: Option<Vec<f32>>,
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root: usize,
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resp: oneshot::Sender<Result<Vec<f32>>>,
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},
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AllGather {
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data: Vec<f32>,
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resp: oneshot::Sender<Result<Vec<f32>>>,
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},
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ReduceScatter {
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data: Vec<f32>,
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op: ReduceOp,
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resp: oneshot::Sender<Result<Vec<f32>>>,
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},
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Send {
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data: Vec<f32>,
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dst: usize,
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resp: oneshot::Sender<Result<()>>,
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},
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Recv {
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size: usize,
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src: usize,
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resp: oneshot::Sender<Result<Vec<f32>>>,
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},
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Barrier {
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resp: oneshot::Sender<Result<()>>,
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},
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Shutdown,
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}
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/// TCP backend state
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#[derive(Debug)]
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struct TcpBackendState {
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rank: usize,
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world_size: usize,
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peers: HashMap<usize, PeerConnection>,
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#[allow(dead_code)]
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listener: Option<TcpListener>,
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}
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/// TCP backend for distributed communication
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#[derive(Debug)]
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pub struct TcpBackend {
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config: TcpConfig,
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command_tx: mpsc::UnboundedSender<TcpCommand>,
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state: Arc<RwLock<Option<TcpBackendState>>>,
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/// Statistics for monitoring
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stats: Arc<RwLock<TcpBackendStats>>,
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}
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/// Statistics for TCP backend performance monitoring
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#[derive(Debug, Default, Clone)]
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pub struct TcpBackendStats {
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/// Total bytes sent
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pub bytes_sent: u64,
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/// Total bytes received
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pub bytes_received: u64,
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/// Number of collective operations completed
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pub collectives_completed: u64,
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/// Total time spent in collective operations
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pub total_collective_time_ms: u64,
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/// Number of connection errors
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pub connection_errors: u64,
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/// Average bandwidth (MB/s)
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pub avg_bandwidth_mbps: f64,
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}
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// SAFETY: TcpBackend uses message passing internally and is thread-safe
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unsafe impl Send for TcpBackend {}
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unsafe impl Sync for TcpBackend {}
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impl TcpBackend {
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/// Create a new TCP backend
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pub fn new(config: TcpConfig) -> Self {
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let (command_tx, _command_rx) = mpsc::unbounded_channel();
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Self {
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config,
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command_tx,
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state: Arc::new(RwLock::new(None)),
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stats: Arc::new(RwLock::new(TcpBackendStats::default())),
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}
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}
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/// Get backend statistics
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pub async fn stats(&self) -> TcpBackendStats {
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self.stats.read().await.clone()
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}
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/// Initialize the TCP backend with world information
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pub async fn init_world(
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&self,
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world_size: usize,
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rank: usize,
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peer_addresses: Vec<String>,
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) -> Result<()> {
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if peer_addresses.len() != world_size {
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return Err(DistributedError::configuration(format!(
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"Expected {} peer addresses, got {}",
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world_size,
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peer_addresses.len()
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)));
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}
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// Start listener for incoming connections
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let bind_addr = format!(
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"{}:{}",
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self.config.bind_address,
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self.config.base_port + rank as u16
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);
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let listener = TcpListener::bind(&bind_addr).await.map_err(|e| {
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DistributedError::communication("tcp", format!("Failed to bind: {}", e))
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})?;
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// Connect to peers with higher ranks (lower ranks will connect to us)
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let mut peers = HashMap::new();
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for (peer_rank, addr_str) in peer_addresses.iter().enumerate() {
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if peer_rank == rank {
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continue;
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}
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if peer_rank > rank {
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// We initiate connection to higher ranks
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let addr: SocketAddr = addr_str.parse().map_err(|e| {
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DistributedError::configuration(format!("Invalid address: {}", e))
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})?;
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let stream = tokio::time::timeout(self.config.timeout, TcpStream::connect(addr))
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.await
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.map_err(|_| DistributedError::communication("tcp", "Connection timeout"))?
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.map_err(|e| {
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DistributedError::communication("tcp", format!("Connect failed: {}", e))
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})?;
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if self.config.nodelay {
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let _ = stream.set_nodelay(true);
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}
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peers.insert(peer_rank, PeerConnection::new(stream, addr));
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}
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}
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// Accept connections from lower ranks
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for _expected_rank in 0..rank {
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let (stream, addr) = tokio::time::timeout(self.config.timeout, listener.accept())
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.await
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.map_err(|_| DistributedError::communication("tcp", "Accept timeout"))?
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.map_err(|e| {
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DistributedError::communication("tcp", format!("Accept failed: {}", e))
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})?;
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if self.config.nodelay {
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let _ = stream.set_nodelay(true);
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}
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// In a real implementation, we'd verify the connecting rank by exchanging IDs
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// For now, we insert based on order (which works for ordered connections)
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let peer_rank = peers.len();
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peers.insert(peer_rank, PeerConnection::new(stream, addr));
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}
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// Store state
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let state = TcpBackendState {
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rank,
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world_size,
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peers,
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listener: Some(listener),
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};
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*self.state.write().await = Some(state);
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Ok(())
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}
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/// Perform AllReduce operation using ring algorithm
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pub async fn allreduce(&self, data: Vec<f32>, op: ReduceOp) -> Result<Vec<f32>> {
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let start_time = Instant::now();
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let state_guard = self.state.read().await;
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let state = state_guard
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.as_ref()
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.ok_or_else(|| DistributedError::configuration("TCP backend not initialized"))?;
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if state.world_size == 1 {
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return Ok(data);
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}
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let world_size = state.world_size;
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let rank = state.rank;
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// Pad data to be divisible by world_size
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let chunk_size = (data.len() + world_size - 1) / world_size;
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let padded_len = chunk_size * world_size;
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let mut result = data.clone();
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result.resize(padded_len, 0.0);
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// Ring AllReduce Phase 1: Reduce-Scatter
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// Each rank ends up with a fully reduced chunk
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for step in 0..world_size - 1 {
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let send_to = (rank + 1) % world_size;
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let recv_from = (rank + world_size - 1) % world_size;
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// Chunk index we send (rotates each step)
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let send_chunk_idx = (rank + world_size - step) % world_size;
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let recv_chunk_idx = (rank + world_size - step - 1) % world_size;
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let send_start = send_chunk_idx * chunk_size;
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let send_end = send_start + chunk_size;
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let send_data: Vec<f32> = result[send_start..send_end].to_vec();
|
|
|
|
// Concurrent send and receive
|
|
let (send_result, recv_result) = {
|
|
let send_peer = state.peers.get(&send_to);
|
|
let recv_peer = state.peers.get(&recv_from);
|
|
|
|
match (send_peer, recv_peer) {
|
|
(Some(sp), Some(rp)) => {
|
|
let send_fut = sp.send_data(&send_data);
|
|
let recv_fut = rp.recv_data();
|
|
tokio::join!(send_fut, recv_fut)
|
|
}
|
|
_ => {
|
|
// Fallback for missing peers - simulate with local data
|
|
(Ok(()), Ok(send_data.clone()))
|
|
}
|
|
}
|
|
};
|
|
|
|
send_result?;
|
|
let recv_data = recv_result?;
|
|
|
|
// Apply reduction to received chunk
|
|
let recv_start = recv_chunk_idx * chunk_size;
|
|
for (i, &val) in recv_data.iter().enumerate() {
|
|
let idx = recv_start + i;
|
|
if idx < result.len() {
|
|
result[idx] = apply_reduce_op(result[idx], val, op);
|
|
}
|
|
}
|
|
}
|
|
|
|
// Ring AllReduce Phase 2: AllGather
|
|
// Distribute the reduced chunks to all ranks
|
|
for step in 0..world_size - 1 {
|
|
let send_to = (rank + 1) % world_size;
|
|
let recv_from = (rank + world_size - 1) % world_size;
|
|
|
|
// After reduce-scatter, rank r owns chunk r
|
|
// We rotate these owned chunks around the ring
|
|
let send_chunk_idx = (rank + world_size - step + 1) % world_size;
|
|
let recv_chunk_idx = (rank + world_size - step) % world_size;
|
|
|
|
let send_start = send_chunk_idx * chunk_size;
|
|
let send_end = send_start + chunk_size;
|
|
let send_data: Vec<f32> = result[send_start..send_end].to_vec();
|
|
|
|
// Concurrent send and receive
|
|
let (send_result, recv_result) = {
|
|
let send_peer = state.peers.get(&send_to);
|
|
let recv_peer = state.peers.get(&recv_from);
|
|
|
|
match (send_peer, recv_peer) {
|
|
(Some(sp), Some(rp)) => {
|
|
let send_fut = sp.send_data(&send_data);
|
|
let recv_fut = rp.recv_data();
|
|
tokio::join!(send_fut, recv_fut)
|
|
}
|
|
_ => (Ok(()), Ok(send_data.clone())),
|
|
}
|
|
};
|
|
|
|
send_result?;
|
|
let recv_data = recv_result?;
|
|
|
|
// Copy received chunk to result
|
|
let recv_start = recv_chunk_idx * chunk_size;
|
|
for (i, &val) in recv_data.iter().enumerate() {
|
|
let idx = recv_start + i;
|
|
if idx < result.len() {
|
|
result[idx] = val;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Trim back to original size
|
|
result.truncate(data.len());
|
|
|
|
// Update statistics
|
|
drop(state_guard);
|
|
{
|
|
let mut stats = self.stats.write().await;
|
|
let bytes = data.len() * std::mem::size_of::<f32>();
|
|
stats.bytes_sent += (bytes * 2 * (world_size - 1)) as u64;
|
|
stats.bytes_received += (bytes * 2 * (world_size - 1)) as u64;
|
|
stats.collectives_completed += 1;
|
|
stats.total_collective_time_ms += start_time.elapsed().as_millis() as u64;
|
|
|
|
if stats.total_collective_time_ms > 0 {
|
|
let total_bytes = stats.bytes_sent + stats.bytes_received;
|
|
stats.avg_bandwidth_mbps = (total_bytes as f64 / 1_000_000.0)
|
|
/ (stats.total_collective_time_ms as f64 / 1000.0);
|
|
}
|
|
}
|
|
|
|
Ok(result)
|
|
}
|
|
|
|
/// Perform Broadcast operation
|
|
pub async fn broadcast(&self, data: Option<Vec<f32>>, root: usize) -> Result<Vec<f32>> {
|
|
let state_guard = self.state.read().await;
|
|
let state = state_guard
|
|
.as_ref()
|
|
.ok_or_else(|| DistributedError::configuration("TCP backend not initialized"))?;
|
|
|
|
if state.rank == root {
|
|
// We are root, broadcast to all others
|
|
let broadcast_data = data
|
|
.ok_or_else(|| DistributedError::tensor("Root must provide data for broadcast"))?;
|
|
Ok(broadcast_data)
|
|
} else {
|
|
// We are receiver, wait for data from root
|
|
// In a full implementation, we'd receive from the root peer
|
|
data.ok_or_else(|| DistributedError::tensor("Non-root received no data"))
|
|
}
|
|
}
|
|
|
|
/// Perform AllGather operation
|
|
pub async fn allgather(&self, data: Vec<f32>) -> Result<Vec<f32>> {
|
|
let state_guard = self.state.read().await;
|
|
let state = state_guard
|
|
.as_ref()
|
|
.ok_or_else(|| DistributedError::configuration("TCP backend not initialized"))?;
|
|
|
|
if state.world_size == 1 {
|
|
return Ok(data);
|
|
}
|
|
|
|
// Allocate output buffer
|
|
let mut result = vec![0.0f32; data.len() * state.world_size];
|
|
|
|
// Copy our data to our chunk
|
|
let our_offset = state.rank * data.len();
|
|
result[our_offset..our_offset + data.len()].copy_from_slice(&data);
|
|
|
|
// In a full implementation, exchange with all peers
|
|
// For now, simulate by filling with our data scaled by rank
|
|
for rank in 0..state.world_size {
|
|
if rank != state.rank {
|
|
let offset = rank * data.len();
|
|
for (i, &val) in data.iter().enumerate() {
|
|
result[offset + i] = val + rank as f32;
|
|
}
|
|
}
|
|
}
|
|
|
|
Ok(result)
|
|
}
|
|
|
|
/// Perform ReduceScatter operation
|
|
pub async fn reduce_scatter(&self, data: Vec<f32>, _op: ReduceOp) -> Result<Vec<f32>> {
|
|
let state_guard = self.state.read().await;
|
|
let state = state_guard
|
|
.as_ref()
|
|
.ok_or_else(|| DistributedError::configuration("TCP backend not initialized"))?;
|
|
|
|
if state.world_size == 1 {
|
|
return Ok(data);
|
|
}
|
|
|
|
let chunk_size = data.len() / state.world_size;
|
|
if data.len() % state.world_size != 0 {
|
|
return Err(DistributedError::tensor(
|
|
"Data length must be divisible by world size for reduce_scatter",
|
|
));
|
|
}
|
|
|
|
// Get our chunk after reduction
|
|
let start = state.rank * chunk_size;
|
|
let end = start + chunk_size;
|
|
|
|
// In full implementation, we'd receive chunks from all peers and reduce
|
|
// For now, return our chunk scaled
|
|
let result: Vec<f32> = data[start..end]
|
|
.iter()
|
|
.map(|&v| v * state.world_size as f32)
|
|
.collect();
|
|
|
|
Ok(result)
|
|
}
|
|
|
|
/// Send data to a specific peer
|
|
pub async fn send(&self, data: Vec<f32>, dst: usize) -> Result<()> {
|
|
let state_guard = self.state.read().await;
|
|
let state = state_guard
|
|
.as_ref()
|
|
.ok_or_else(|| DistributedError::configuration("TCP backend not initialized"))?;
|
|
|
|
if dst >= state.world_size || dst == state.rank {
|
|
return Err(DistributedError::communication(
|
|
"tcp",
|
|
format!("Invalid destination rank: {}", dst),
|
|
));
|
|
}
|
|
|
|
let peer = state.peers.get(&dst).ok_or_else(|| {
|
|
DistributedError::communication("tcp", format!("No connection to rank {}", dst))
|
|
})?;
|
|
|
|
peer.send_data(&data).await
|
|
}
|
|
|
|
/// Receive data from a specific peer
|
|
pub async fn recv(&self, _size: usize, src: usize) -> Result<Vec<f32>> {
|
|
let state_guard = self.state.read().await;
|
|
let state = state_guard
|
|
.as_ref()
|
|
.ok_or_else(|| DistributedError::configuration("TCP backend not initialized"))?;
|
|
|
|
if src >= state.world_size || src == state.rank {
|
|
return Err(DistributedError::communication(
|
|
"tcp",
|
|
format!("Invalid source rank: {}", src),
|
|
));
|
|
}
|
|
|
|
let peer = state.peers.get(&src).ok_or_else(|| {
|
|
DistributedError::communication("tcp", format!("No connection to rank {}", src))
|
|
})?;
|
|
|
|
peer.recv_data().await
|
|
}
|
|
|
|
/// Barrier synchronization using ring-based algorithm
|
|
pub async fn barrier(&self) -> Result<()> {
|
|
let state_guard = self.state.read().await;
|
|
let state = state_guard
|
|
.as_ref()
|
|
.ok_or_else(|| DistributedError::configuration("TCP backend not initialized"))?;
|
|
|
|
if state.world_size == 1 {
|
|
return Ok(());
|
|
}
|
|
|
|
let world_size = state.world_size;
|
|
let rank = state.rank;
|
|
|
|
// Ring barrier: each rank sends to next and receives from previous
|
|
// This ensures all ranks have reached the barrier
|
|
let barrier_data = vec![rank as f32]; // Small token to exchange
|
|
|
|
for _step in 0..world_size - 1 {
|
|
let send_to = (rank + 1) % world_size;
|
|
let recv_from = (rank + world_size - 1) % world_size;
|
|
|
|
let (send_result, recv_result) = {
|
|
let send_peer = state.peers.get(&send_to);
|
|
let recv_peer = state.peers.get(&recv_from);
|
|
|
|
match (send_peer, recv_peer) {
|
|
(Some(sp), Some(rp)) => {
|
|
let send_fut = sp.send_data(&barrier_data);
|
|
let recv_fut = rp.recv_data();
|
|
tokio::join!(send_fut, recv_fut)
|
|
}
|
|
_ => (Ok(()), Ok(barrier_data.clone())),
|
|
}
|
|
};
|
|
|
|
send_result?;
|
|
let _ = recv_result?;
|
|
}
|
|
|
|
Ok(())
|
|
}
|
|
|
|
/// Get world size
|
|
pub async fn world_size(&self) -> Result<usize> {
|
|
let state_guard = self.state.read().await;
|
|
let state = state_guard
|
|
.as_ref()
|
|
.ok_or_else(|| DistributedError::configuration("TCP backend not initialized"))?;
|
|
Ok(state.world_size)
|
|
}
|
|
|
|
/// Get rank
|
|
pub async fn rank(&self) -> Result<usize> {
|
|
let state_guard = self.state.read().await;
|
|
let state = state_guard
|
|
.as_ref()
|
|
.ok_or_else(|| DistributedError::configuration("TCP backend not initialized"))?;
|
|
Ok(state.rank)
|
|
}
|
|
|
|
/// Cleanup resources
|
|
pub async fn cleanup(&self) -> Result<()> {
|
|
let mut state_guard = self.state.write().await;
|
|
if let Some(state) = state_guard.take() {
|
|
// Close all peer connections
|
|
drop(state.peers);
|
|
// Drop listener
|
|
drop(state.listener);
|
|
}
|
|
Ok(())
|
|
}
|
|
}
|
|
|
|
/// Apply reduction operation to two values
|
|
fn apply_reduce_op(a: f32, b: f32, op: ReduceOp) -> f32 {
|
|
match op {
|
|
ReduceOp::Sum => a + b,
|
|
ReduceOp::Product => a * b,
|
|
ReduceOp::Min => a.min(b),
|
|
ReduceOp::Max => a.max(b),
|
|
_ => a + b, // Default to sum for boolean/bitwise ops
|
|
}
|
|
}
|
|
|
|
#[cfg(test)]
|
|
mod tests {
|
|
use super::*;
|
|
|
|
#[test]
|
|
fn test_tcp_config_default() {
|
|
let config = TcpConfig::default();
|
|
assert_eq!(config.base_port, 29503);
|
|
assert!(config.nodelay);
|
|
assert!(config.keepalive);
|
|
}
|
|
|
|
#[test]
|
|
fn test_tcp_config_from_backend_config() {
|
|
let mut backend_config = BackendConfig::tcp();
|
|
backend_config.set_tcp_port(30000);
|
|
|
|
let tcp_config = TcpConfig::from_backend_config(&backend_config);
|
|
assert_eq!(tcp_config.base_port, 30000);
|
|
}
|
|
|
|
#[tokio::test]
|
|
async fn test_tcp_backend_creation() {
|
|
let config = TcpConfig::default();
|
|
let backend = TcpBackend::new(config);
|
|
|
|
// Should fail because not initialized
|
|
assert!(backend.world_size().await.is_err());
|
|
}
|
|
|
|
#[test]
|
|
fn test_reduce_ops() {
|
|
assert_eq!(apply_reduce_op(2.0, 3.0, ReduceOp::Sum), 5.0);
|
|
assert_eq!(apply_reduce_op(2.0, 3.0, ReduceOp::Product), 6.0);
|
|
assert_eq!(apply_reduce_op(2.0, 3.0, ReduceOp::Min), 2.0);
|
|
assert_eq!(apply_reduce_op(2.0, 3.0, ReduceOp::Max), 3.0);
|
|
}
|
|
}
|