Network Adapter TaaS for Lower Host Translation Overhead
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Solution Overview
Problem
Existing network adapters require continuous emulation of address translation structures and logic, leading to inefficiencies and increased host burden in managing address translations, particularly in virtualized environments.
Innovation Solution
A network adapter with integrated Translation-as-a-Service (TaaS) circuitry that independently performs address translations, including VA-to-VA, VA-to-PA, and VA-to-MA translations, relieving the host of the need to maintain parallel translation structures and logic.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the host maintains parallel translation structures and logic for address translation, then address translation can be performed, but host overhead and complexity increase
Solution Approach 1:
The patent extracts the address translation service functionality from the host system and relocates it to the network adapter. The TaaS circuitry within the network adapter independently performs address translations that were previously handled by the host, thereby reducing host overhead while maintaining translation capability.
Solution Approach 2:
The TaaS circuitry acts as an intermediary between the network adapter and the host memory system. It handles address translation requests independently, serving as a mediator that resolves address translations without requiring the host to maintain parallel translation structures, thus reducing host burden.
2Ease of operation
If address translation is integrated into the network adapter, then host overhead is reduced, but network adapter complexity increases
Solution Approach 1:
The patent merges the address translation service functionality with the network adapter by integrating TaaS circuitry into it. This combination allows the network adapter to perform both network processing and address translation functions, reducing host overhead while consolidating functionality in a single device.
Solution Approach 2:
The network adapter is enhanced with multi-functionality by incorporating TaaS circuitry that can perform various types of address translations (VA-to-PA, VA-to-VA, etc.). This universal translation capability is integrated into the network adapter, allowing it to serve multiple purposes without proportionally increasing complexity.
3Productivity
If address translation is coupled with memory access operations, then translation can be performed, but performance is reduced due to continuous emulation requirements
Solution Approach 1:
The TaaS circuitry performs address translations independently of actual memory access operations. By decoupling translation from memory access, the system can perform translations on-demand without requiring continuous emulation, thereby improving performance and reducing wasted time.
Solution Approach 2:
The patent segments the address translation operation from the memory access operation. The TaaS circuitry handles translation as a separate, independent function that can be performed whenever needed, rather than being tightly coupled with memory access timing, thus eliminating the need for continuous emulation.
Data Source
AI summary
A network adapter including a host interface, a network interface, packet processing circuitry, and Translation-as-a-Service (TaaS) circuitry. The host interface is to communicate with a host over a peripheral bus. The network interface is to send and receive packets to and from a network for the host. The packet processing circuitry is to process the packets. The TaaS circuitry is integrated in the network adapter and is to (i) receive from a requesting device a request to translate an input address into a requested address in a requested address space, (ii) translate the input address into the one or more requested addresses, and (iii) return the one or more requested addresses to the requesting device.