Thread Key DMA Pool for Packet Processing
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Solution Overview
Problem
Traditional network and storage systems in cloud computing architectures face performance and administrative bottlenecks, particularly in managing packet processing and buffer utilization in high-performance networking devices with limited CPU capability and memory.
Innovation Solution
A system that employs a thread scheduling engine to assign thread keys for software threads and utilizes a pool of direct memory access (DMA) resources for efficient packet processing, allowing multiple threads to access DMA resources without locking and optimizing buffer utilization through dynamic allocation and linked lists or linear arrays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional network and storage systems are used in cloud computing architectures, then system stability is maintained, but performance bottlenecks and administrative overhead increase
Solution Approach 1:
The system segments packet processing into multiple independent software threads, each capable of processing packets concurrently. This segmentation allows the system to achieve high throughput by distributing processing across multiple threads while maintaining manageable complexity through modular design
Solution Approach 2:
The patent implements a universal DMA resource pool that can be accessed by multiple software threads for packet processing. This multi-functional resource pool eliminates the need for separate DMA resources for each thread, reducing administrative overhead while maintaining high processing capability
2Productivity
If multiple software threads access DMA resources concurrently, then packet processing throughput increases, but resource contention and locking overhead increase
Solution Approach 1:
The system implements a self-service mechanism where software threads can directly access and utilize DMA resources from the shared pool without requiring external coordination or locking. Each thread independently manages its own access to DMA resources, eliminating the time loss associated with traditional locking mechanisms
Solution Approach 2:
The patent introduces an intermediary thread key mechanism that mediates access to the shared DMA resource pool. This intermediary allows multiple threads to access resources concurrently without direct contention, as the thread key serves as an indirect access path that eliminates the need for mutex locks or semaphores
3Productivity
If a thread key is assigned to each software thread for DMA resource access, then concurrent access without locking is enabled, but memory footprint increases
Solution Approach 1:
The thread key structure is designed as a universal, compact identifier that can be reused across multiple DMA resource accesses. This single thread key serves multiple purposes: identifying the software thread, enabling direct access to the DMA resource pool, and facilitating concurrent operations without requiring separate data structures for each thread, thus minimizing memory footprint
Solution Approach 2:
Instead of allocating separate, large data structures for each software thread, the system uses a compact thread key that acts as a lightweight reference or copy identifier. This approach allows multiple threads to be represented with minimal memory overhead while still enabling full concurrent access capability to the shared DMA resources
Data Source
AI summary
A system and method can support efficient packet processing in a network environment. The system can comprise a thread scheduling engine that operates to assign a thread key to each software thread in a plurality of software threads. Furthermore, the system can comprise a pool of direct memory access (DMA) resources that can be used to process packets in the network environment. Additionally, each said software thread operates to request access to a DMA resource in the pool of DMA resources by presenting an assigned thread key, and a single software thread is allowed to access multiple DMA resources using the same thread key.