A Degree Priority Routing Algorithm for Irregular Mesh Topology NoCs

Author(s):  
Ling Wang ◽  
Hui Song ◽  
Dongxin Wen ◽  
Yingtao Jiang
Author(s):  
V. Samadi Bokharaei ◽  
A. Shamaei ◽  
H. Sarbaziazad ◽  
M. Abbaspour

2017 ◽  
Vol 17 (2) ◽  
pp. 73-82 ◽  
Author(s):  
Akash Punhani ◽  
Pardeep Kumar ◽  
Nitin Nitin

Abstract The performance of the interconnection network doesn’t only depend on the topology, but it also depends on the Routing algorithm used. The simplest Routing algorithm for the mesh topology in networks on chip is the XY Routing algorithm. The level based Routing algorithm has been proved to be more efficient than the XY Routing algorithm. In this paper, level based Routing algorithm using the dynamic programming has been proposed. The proposed Routing algorithm proves to be more efficient in the terms of the computation. The proposed Routing algorithm has achieved up to two times bigger speed.


2014 ◽  
Vol 37 ◽  
pp. 85-91 ◽  
Author(s):  
Muhammad H. Raza ◽  
Ankit K. Kansara ◽  
Aliraza Nafarieh ◽  
William Robertson

2021 ◽  
Vol 20 (3) ◽  
pp. 1-6
Author(s):  
Mohammed Shaba Saliu ◽  
Muyideen Omuya Momoh ◽  
Pascal Uchenna Chinedu ◽  
Wilson Nwankwo ◽  
Aliu Daniel

Network-on-Chip (NoC) has been proposed as a viable solution to the communication challenges on System-on-Chips (SoCs). As the communication paradigm of SoC, NoCs performance depends mainly on the type of routing algorithm chosen. In this paper different categories of routing algorithms were compared. These include XY routing, OE turn model adaptive routing, DyAD routing and Age-Aware adaptive routing.  By varying the load at different Packet Injection Rate (PIR) under random traffic pattern, comparison was conducted using a 4 × 4 mesh topology. The Noxim simulator, a cycle accurate systemC based simulator was employed. The packets were modeled as a Poisson distribution; first-in-first-out (FIFO) input buffer channel with a depth of five (5) flits and a flit size of 32 bits; and a packet size of 3 flits respectively. The simulation time was 10,000 cycles. The findings showed that the XY routing algorithm performed better when the PIR is low.  In a similar vein, the DyAD routing and Age-aware algorithms performed better when the load i.e. PIR is high.


Author(s):  
Kamel Messaoudi ◽  
Salah Toumi ◽  
El-Bay Bourennane

Background: Network on chip is proposed as new reusable and scalable communication system for applications with important number of IPs. The NoC architecture characteristics are based on several factors: the implementation strategy of IPs, the power dissipation, the placement of IPs, data transfer time, the requirements of the given application, etc. The N×M Mesh topology combined with the XY routing algorithm are generally chosen in many studies. Hardware IPs proposed in the literature, for various applications as example video encoders, operates at different frequencies and generally implemented according to several strategies and different bus sizes. Connecting these IPs using the same communication system is very difficult. Methods: In this paper, we present a new topology based on multi-layer mesh topology and adapted for video coding applications. The proposed topology exploits the video coding information regarding groups of cores that communicate through two cores only. The idea is to use a specific NoC for each group of cores and connect the NoCs with bridge in the positions of two communication cores. The choice of parameters in each NoC depends on the characteristic of IPs in the same group in order to maximize communication adaptivity and performance. Results: Synthesis results show that the proposed multi-layer mesh topology NoC uses much less resources than the traditional NxM mesh topology NoC. Conclusion: This reduction in term of resources is assured by the considerable reduction in the length and number of global interconnects, resulting in an increase in the performance and decrease in the power consumption and area of wire limited circuits.


Author(s):  
Renu Verma ◽  
Mohammad Ayoub Khan ◽  
Amit Zinzuwadiya

Efficient routing is challenging and crucial problem in the irregular mesh NoC topologies because of increasing hardware cost and routing tables. In this paper, the authors propose an efficient deadlock-free routing algorithm for irregular mesh NoCs which reduces the latency and power consumption significantly. The problem with degree priority based routing algorithm is that it cannot remove deadlocks in irregular mesh topologies. Therefore, the authors use the extended Logic Based Distributed Routing (LBDRe) to remove deadlock situations without using any virtual channel in the degree priority based routing algorithm. The proposed LBDRe based technique also removes the dependency on routing tables. The authors further apply odd-Even routing algorithm to LBDRe to ensure that some turns are prohibited to remove deadlocks. Experimental results show that the proposed routing algorithm reduces power consumption by 9–22% and overall average latency by 8–12% with the minimum hardware cost for the irregular mesh NoC topologies.


2008 ◽  
Vol 57 (9) ◽  
pp. 1156-1168 ◽  
Author(s):  
Shu-Yen Lin ◽  
Chun-Hsiang Huang ◽  
Chih-Hao Chao ◽  
Keng-Hsien Huang ◽  
An-Yeu Wu

In recent days, On-Chip Communication is a major requirement in modern systems that produce efficient communication with less complexity and high throughput. Due to heavy traffic and increasing Network-On Chip (NoC) size, the routing algorithm produces poor performances. Normally, round-robin and matrix arbiters are used in NoC for high-speed switches. In this research work, three different types of arbiter algorithms are used such as priority algorithm, Time Division Multiplexed (TDM) algorithm, and Viterbi algorithm to improve the linearity of the NOC. Initially, the priority algorithm helps to minimize traffic congestion when the arbiter is in a busy mode. Second, the fairness and Quality of Service (QoS) of the NoC structure are analyzed by the TDM algorithm. Finally, the Viterbi algorithm based error prediction process is done in an NoC structure. Due to the usage of three proposed arbiter algorithms, the area of NoC can be reduced. The packet can be reached to the destination by using the arbitration process with less loss. In this research, the proposed methodology is called as Low AreaFault-Tolerant Adaptive Arbitration based NoC architecture (LAFTAA- NoC architecture). Finally, the Field Programmable Gate Array (FPGA) performance is evaluated such as LUT, flip flop, slices, and frequency in Spartan 6 hardware. In the proposed method, 2.42% of LUT, 3.1% of flip flop, and 8.63% of slices have reduced when compared to existing work.


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