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A Bandwidth Control Arbitration for SoC Interconnections Performing Applications with Task Dependencies.

Salvador Ibarra-Delgado1,2, Remberto Sandoval-Arechiga1, José Ricardo Gómez-Rodríguez1

  • 1Center of Research, Innovation and Development in Telecommunications (CIDTE), Academic Unit of Electrical Engineering, Autonomous University of Zacatecas, Zacatecas 98000, Mexico.

Micromachines
|December 3, 2020
PubMed
Summary

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Electrical engineering plays a pivotal role in our daily lives, with control systems at the heart of many applications, from home appliances to sophisticated space shuttles. Control systems manage and regulate the behavior of devices and processes, ensuring they function safely, correctly, and efficiently.
In modern vehicles, control systems manage various functions to enhance performance and safety. The steering wheel and accelerator are primary inputs in a car's control system. The...
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There are several methods to control power flow in power systems:
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Phase-lag controllers are widely used in control systems to improve stability and reduce steady-state errors. A dimmer switch controlling the brightness of a light bulb serves as a practical example of phase-lag control, gradually adjusting the bulb's brightness. Mathematically, phase-lag control or low-pass filtering is represented when the factor 'a' is less than 1.
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Bus Impedance Matrix01:24

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Calculating subtransient fault currents for three-phase faults in an N-bus power system involves using the positive-sequence network. When a three-phase short circuit occurs at a specific bus, the analysis uses the superposition method to evaluate two separate circuits.
In the first circuit, all machine voltage sources are short-circuited, leaving only the prefault voltage source at the fault location. The positive-sequence bus impedance matrix can be determined by solving the nodal equations,...
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Load-frequency control01:28

Load-frequency control

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Load-frequency control (LFC) is vital for maintaining power system stability, ensuring that frequency and power flows remain within acceptable limits during load changes. Turbine-governor control eliminates rotor accelerations and decelerations following load changes. However, a steady-state frequency error persists when the change in the turbine-governor reference setting is zero. In an interconnected power system, each area agrees to export or import a scheduled amount of power through...
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Fast Decoupled and DC Powerflow

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The fast decoupled power flow method addresses contingencies in power system operations, such as generator outages or transmission line failures. This method provides quick power flow solutions, essential for real-time system adjustments. Fast decoupled power flow algorithms simplify the Jacobian matrix by neglecting certain elements, leading to two sets of decoupled equations:
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Square Split-Ring Resonator as a Sensor for Detection of Nanoparticles in PVDF-Based Nanocomposites at Ultra-High Frequencies: MXenes and MoS<sub>2</sub> Concentrations.

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A Survey of Software-Defined Networks-on-Chip: Motivations, Challenges and Opportunities.

Micromachines·2021
This summary is machine-generated.

A novel bus arbitration policy offers fine-grained bandwidth control for System-on-Chips (SoCs). This method, using opportunistic access and supervised debt, ensures deadlock-free operation and outperforms existing strategies.

Area of Science:

  • Computer Engineering
  • Hardware Architecture
  • System Design

Background:

  • System-on-Chips (SoCs) face resource contention from dependent tasks.
  • Existing arbitration policies (e.g., Round-Robin, TDMA) lack fine-grained bandwidth control.
  • Effective arbitration is crucial for guaranteeing application access and bandwidth.

Purpose of the Study:

  • To introduce an innovative arbitration policy for SoC interconnection systems.
  • To provide fine-grained control over bus utilization and access.
  • To address the limitations of current arbitration strategies in managing competing applications.

Main Methods:

  • Developed a novel arbitration policy combining opportunistic access and supervised debt.
  • Each competing element is assigned a flit budget for resource utilization.
Keywords:
System-on-Chiparbiterbandwidth controlinterconnectionquality of service

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  • Opportunistic access allows requests beyond the budget, managed by supervised debt tracking.
  • Applied the policy to buses, switches, and routers within interconnection systems.

    • Main Results:

    • The proposed policy achieves deadlock-free behavior, even with task-dependent applications.
    • Cycle-accurate simulation models were used for performance analysis.
    • Demonstrated superior bandwidth control compared to Lottery, TDMA, and Weighted Round-Robin.
    • The synergy between opportunistic and supervised debt techniques proved effective.

    Conclusions:

    • The novel arbitration policy provides essential fine-grained bandwidth control for SoCs.
    • It effectively manages resource contention in complex, task-dependent environments.
    • This approach offers a significant improvement over existing arbitration methods for interconnection systems.