Scalable two-stage Clos-network switch and module-first matching

Memory-space-memory (MSM) arrangement is a popular architecture to implement three-stage Clos-network switches with distributed arbitration. The scalability of this architecture, however, is limited by the round-trip communication delay between the first and the second stages. Moreover, virtual output queue does not completely remove the blocking in the buffered modules under multi-class traffic. In this paper, we propose a competition-free memory–memory–memory (CFM3) switch which is a three-stage Clos-network switch with buffered center stage. The CFM3 deploys buffered modules in all stages to simplify communication between stages. To reduce the blocking, each module is equipped with a set of buffers fully separated according to the destinations, classes of packets and the input ports of the module. Despite the buffered center stage, CFM3 is free from reordering problem due to simple control mechanism. Simulation result shows the delay of the proposed CFM3 switch closely approaches that of the ideal Output Queued switch under multi-class traffic when strict priority policy popularly used for class-based switch is deployed. The CFM3 achieves 100% throughput under uniformly distributed four-class traffic with strict priority policy while traditional MSM switch records about 77% throughput.

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Shared Buffer-Based Reverse Scheduling for Onboard Clos-Network Switch

Communications and Networking - Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering ◽

10.1007/978-3-030-06161-6_70 ◽

2019 ◽

pp. 719-728

Author(s):

Wanli Chen ◽

Kai Liu ◽

Xiang Chen ◽

Xiangming Kong

Keyword(s):

Clos Network ◽

Network Switch ◽

Shared Buffer

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Two-stage self-seeding method for preparation of single crystals of poly(phenylene sulfide)

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100153816 ◽

1989 ◽

Vol 47 ◽

pp. 368-369

Author(s):

Sengshiu Chung ◽

Peggy Cebe

Keyword(s):

Single Crystals ◽

High Performance ◽

Dilute Solution ◽

Two Stage ◽

Annealing Behavior ◽

High Performance Polymers ◽

Seeding Method ◽

Phenylene Sulfide

We are studying the crystallization and annealing behavior of high performance polymers, like poly(p-pheny1ene sulfide) PPS, and poly-(etheretherketone), PEEK. Our purpose is to determine whether PPS, which is similar in many ways to PEEK, undergoes reorganization during annealing. In an effort to address the issue of reorganization, we are studying solution grown single crystals of PPS as model materials.Observation of solution grown PPS crystals has been reported. Even from dilute solution, embrionic spherulites and aggregates were formed. We observe that these morphologies result when solutions containing uncrystallized polymer are cooled. To obtain samples of uniform single crystals, we have used two-stage self seeding and solution replacement techniques.

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Scalable two-stage Clos-network switch and module-first matching

A Practical Large-Capacity Three-Stage Buffered Clos-Network Switch Architecture

MCS: Buffered Clos-network switch with in-sequence packet forwarding

High-capacity clos-network switch for data center networks

Packet dispatching using module matching in the modified MSM Clos-network switch

A Clos-Network Switch Architecture Based on Partially-Buffered Crossbar Fabrics

Concurrent round-robin dispatching scheme in a clos-network switch

A Split-Central-Buffered Load-Balancing Clos-Network Switch With In-Order Forwarding

THREE-STAGE CLOS-NETWORK SWITCH ARCHITECTURE WITH BUFFERED CENTER STAGE FOR MULTI-CLASS TRAFFIC

Shared Buffer-Based Reverse Scheduling for Onboard Clos-Network Switch

Two-stage self-seeding method for preparation of single crystals of poly(phenylene sulfide)

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