Memory-Mapped Hardware FIFOs for Low-Latency Packet Handling
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Solution Overview
Problem
Current microprocessor systems face challenges in efficiently handling high-data-rate network traffic, leading to latency penalties, cache pollution, and potential data corruption or loss due to the processing of network packets.
Innovation Solution
The implementation of memory-mapped hardware FIFOs with a small state machine or microcontroller to efficiently manage and process data across a distributed computing architecture, allowing for low-power processors to handle incoming and outgoing data efficiently by mapping FIFO heads and tails into the processor's address space and offloading queue management to hardware.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If network packets are sent to cache for processing, then data can be stored and retrieved, but latency penalties increase and cache pollution occurs
Solution Approach 1:
The patent extracts network packet handling operations from the main processor and cache system by introducing dedicated hardware FIFO buffers and state machines. These specialized components handle packet queuing, addressing, and data movement independently, preventing cache pollution and reducing latency associated with general-purpose processor handling.
Solution Approach 2:
The patent introduces hardware FIFO buffers as intermediary components between the network interface and the processor/cache system. These FIFOs act as mediators that buffer incoming packets, manage data flow, and coordinate with the processor only when necessary, thereby reducing direct cache access and latency penalties.
2Ease of operation
If multiple FIFOs are implemented to handle different data types, then data organization improves, but device complexity increases
Solution Approach 1:
The patent implements universal FIFO buffer structures that can handle multiple data types and network protocols through configuration rather than separate hardware instances. The state machine and control logic are designed to be multi-functional, adapting to different data organization requirements without increasing physical device complexity.
3Productivity
If hardware FIFOs are used instead of software queues, then processing speed increases, but manufacturing complexity increases
Solution Approach 1:
The patent replaces software-based queue management with hardware-implemented FIFO buffers and state machines. This substitution of mechanical/hardware systems for software systems enables parallel processing and eliminates software overhead, significantly increasing data processing speed despite the increased manufacturing complexity of hardware components.
Data Source
AI summary
An apparatus for a microprocessor computer system and method for configuring the same where said microprocessor computer system comprises a processor core and at least one hardware buffer FIFO with memory-mapped head and tail that handles data movement among the processor cores, networks, raw data input and outputs, and memory. The method for configuring said microprocessor computer system comprises utilizing a FIFO auxiliary processor to process said data traversing said hardware FIFO; utilizing said hardware FIFOs to efficiently pipe data through functional blocks; and utilizing a FIFO controller to perform DMA operations that include non-unit-stride access patterns and transfers among processor cores, networks, raw data input and outputs, memory, and other memory-mapped hardware FIFOs.