https://github.com/priyabug/efficient-data-transfer-with-rdma-memory-registration-and-request-handling

This project explores efficient data transfer mechanisms using RDMA, focusing on memory registration, request handling, and performance optimizations.Here we can see the demonstration of how RDMA improves network efficiency by bypassing the operating system kernel and offloading data movement to the network interface card.
https://github.com/priyabug/efficient-data-transfer-with-rdma-memory-registration-and-request-handling

flow-control generating-memory operating-system pinning-memory read-direct-memory-access synchronization work-queue zero-copy

Last synced: 2 months ago
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This project explores efficient data transfer mechanisms using RDMA, focusing on memory registration, request handling, and performance optimizations.Here we can see the demonstration of how RDMA improves network efficiency by bypassing the operating system kernel and offloading data movement to the network interface card.

• Host: GitHub
• URL: https://github.com/priyabug/efficient-data-transfer-with-rdma-memory-registration-and-request-handling
• Owner: Priyabug
• Created: 2024-12-19T23:30:22.000Z (5 months ago)
• Default Branch: main
• Last Pushed: 2025-03-04T02:58:49.000Z (3 months ago)
• Last Synced: 2025-03-04T03:31:22.590Z (3 months ago)
• Topics: flow-control, generating-memory, operating-system, pinning-memory, read-direct-memory-access, synchronization, work-queue, zero-copy
• Language: C
• Homepage:
• Size: 12.7 KB
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
# 🌐 Efficient Data Transfer with RDMA: Memory Registration and Request Handling

## ✨ Description

Efficient data transfer mechanisms are essential for **high-performance computing (HPC)** and modern **distributed systems**.  

**Remote Direct Memory Access (RDMA)** enables direct memory access between the memory spaces of different machines without involving the operating system, resulting in **ultra-low latency** and **high throughput** communication.  

This concept is particularly relevant in scenarios like:

- **Large-scale data processing**

- **Cloud computing**

- **Networked storage systems**

The implementation of **efficient RDMA-based data transfer** involves two critical processes:

1. **Memory registration**

2. **Request handling**

These processes are designed to optimize the use of RDMA by minimizing overhead and ensuring seamless communication.

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## 💻 Languages and Utilities Used

- **C++**

- **Visual Studio Code**

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## 🖥️ Environments Used

- **Windows 10 (21H2)**

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## 🚀 Program Walk-through

### 1. **RDMA Memory Registration**

Memory registration is a prerequisite for RDMA operations, as RDMA devices require memory to be registered to ensure direct access. This process involves:

- **Pinning Memory:**  

Allocating and locking physical memory pages to prevent them from being swapped out by the operating system.

- **Generating Memory Keys:**  

Associating registered memory regions with unique keys to facilitate access control during RDMA operations.

- **Avoiding Re-registration Overheads:**  

Efficient systems implement techniques such as **memory pooling** or **caching registered memory regions** to avoid repetitive registration costs.

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### 2. **Request Handling**

Efficient request handling is crucial for leveraging RDMA's potential in **real-time** and **large-scale** data transfer. This includes:

- **Work Queues (WQ):**  

Managing RDMA operations through **Send, Receive**, and **Completion Queues** to process requests asynchronously.

- **Zero-Copy Transfers:**  

Utilizing RDMA's ability to directly **read from** or **write to remote memory**, eliminating the need for intermediate data copies.

- **Flow Control and Synchronization:**  

Coordinating RDMA requests to handle **contention** and ensure consistency between **sender** and **receiver buffers**.

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