NPRC-I/O: A NoC-based Real-Time I/O System with Reduced Contention and Enhanced Predictability

Zhe Jiang; Xiaotian Dai; Ian Gray; Ran Wei; Zonghua Gu; Qingling Zhao; Shuai Zhao

doi:10.1109/TCAD.2023.3288511

NPRC-I/O: A NoC-based Real-Time I/O System with Reduced Contention and Enhanced Predictability

Zhe Jiang, Xiaotian Dai, Ian Gray, Ran Wei, Zonghua Gu, Qingling Zhao, Shuai Zhao

Computer Science

Research output: Contribution to journal › Article › peer-review

Abstract

All systems rely on inputs and outputs (I/Os) to perceive and interact with their surroundings. In safety-critical systems, it is important to guarantee both the performance and time-predictability of I/O operations. However, with the continued growth of architectural complexity in modern safety-critical systems, satisfying such real-time requirements has become increasingly challenging due to complex I/O transaction paths and extensive hardware contention. In this paper, we present a new NoC-based Predictable I/O system framework (NPRC-I/O) which reduces this contention and ensures the performance and timepredictability of I/O operations. Specifically, NPRC-I/O contains a programmable I/O command controller (NPRC-CC) and a runtime reconfigurable NoC (RNoC), which provides the capability to adjust I/O transaction paths at run-time. Using this flexibility, we construct an end-to-end transmission latency analysis and an optimisation engine that produces configurations for NPRCI/ O and the I/O traffic in a given system. The constructed analysis and optimisation engine guarantee the timing of all hard realtime traffic while reducing the deadline misses of soft real-time traffic and overall transmission latency.

Original language	English
Journal	IEEE Transactions on Computer-Aided Design of Integrated Circuits and Systems
DOIs	https://doi.org/10.1109/TCAD.2023.3288511
Publication status	Published - 28 Jun 2023

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10.1109/TCAD.2023.3288511

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title = "NPRC-I/O: A NoC-based Real-Time I/O System with Reduced Contention and Enhanced Predictability",

abstract = "All systems rely on inputs and outputs (I/Os) to perceive and interact with their surroundings. In safety-critical systems, it is important to guarantee both the performance and time-predictability of I/O operations. However, with the continued growth of architectural complexity in modern safety-critical systems, satisfying such real-time requirements has become increasingly challenging due to complex I/O transaction paths and extensive hardware contention. In this paper, we present a new NoC-based Predictable I/O system framework (NPRC-I/O) which reduces this contention and ensures the performance and timepredictability of I/O operations. Specifically, NPRC-I/O contains a programmable I/O command controller (NPRC-CC) and a runtime reconfigurable NoC (RNoC), which provides the capability to adjust I/O transaction paths at run-time. Using this flexibility, we construct an end-to-end transmission latency analysis and an optimisation engine that produces configurations for NPRCI/ O and the I/O traffic in a given system. The constructed analysis and optimisation engine guarantee the timing of all hard realtime traffic while reducing the deadline misses of soft real-time traffic and overall transmission latency.",

author = "Zhe Jiang and Xiaotian Dai and Ian Gray and Ran Wei and Zonghua Gu and Qingling Zhao and Shuai Zhao",

year = "2023",

month = jun,

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doi = "10.1109/TCAD.2023.3288511",

language = "English",

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T2 - A NoC-based Real-Time I/O System with Reduced Contention and Enhanced Predictability

AU - Jiang, Zhe

AU - Dai, Xiaotian

AU - Gray, Ian

AU - Wei, Ran

AU - Gu, Zonghua

AU - Zhao, Qingling

AU - Zhao, Shuai

PY - 2023/6/28

Y1 - 2023/6/28

N2 - All systems rely on inputs and outputs (I/Os) to perceive and interact with their surroundings. In safety-critical systems, it is important to guarantee both the performance and time-predictability of I/O operations. However, with the continued growth of architectural complexity in modern safety-critical systems, satisfying such real-time requirements has become increasingly challenging due to complex I/O transaction paths and extensive hardware contention. In this paper, we present a new NoC-based Predictable I/O system framework (NPRC-I/O) which reduces this contention and ensures the performance and timepredictability of I/O operations. Specifically, NPRC-I/O contains a programmable I/O command controller (NPRC-CC) and a runtime reconfigurable NoC (RNoC), which provides the capability to adjust I/O transaction paths at run-time. Using this flexibility, we construct an end-to-end transmission latency analysis and an optimisation engine that produces configurations for NPRCI/ O and the I/O traffic in a given system. The constructed analysis and optimisation engine guarantee the timing of all hard realtime traffic while reducing the deadline misses of soft real-time traffic and overall transmission latency.

AB - All systems rely on inputs and outputs (I/Os) to perceive and interact with their surroundings. In safety-critical systems, it is important to guarantee both the performance and time-predictability of I/O operations. However, with the continued growth of architectural complexity in modern safety-critical systems, satisfying such real-time requirements has become increasingly challenging due to complex I/O transaction paths and extensive hardware contention. In this paper, we present a new NoC-based Predictable I/O system framework (NPRC-I/O) which reduces this contention and ensures the performance and timepredictability of I/O operations. Specifically, NPRC-I/O contains a programmable I/O command controller (NPRC-CC) and a runtime reconfigurable NoC (RNoC), which provides the capability to adjust I/O transaction paths at run-time. Using this flexibility, we construct an end-to-end transmission latency analysis and an optimisation engine that produces configurations for NPRCI/ O and the I/O traffic in a given system. The constructed analysis and optimisation engine guarantee the timing of all hard realtime traffic while reducing the deadline misses of soft real-time traffic and overall transmission latency.

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DO - 10.1109/TCAD.2023.3288511

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SN - 0278-0070

JO - IEEE Transactions on Computer-Aided Design of Integrated Circuits and Systems

JF - IEEE Transactions on Computer-Aided Design of Integrated Circuits and Systems

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