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Multidomain Inter/Intrachip Silicon Photonic Networks for Energy-Efficient Rack-Scale Computing Systems
- Source :
- IEEE Transactions on Computer-Aided Design of Integrated Circuits and Systems. 39:626-639
- Publication Year :
- 2020
- Publisher :
- Institute of Electrical and Electronics Engineers (IEEE), 2020.
-
Abstract
- Rack-scale computing systems are promising to undertake the emerging large-scale applications by distributing massive tasks to processing cores. The communication and coordination efficiency of these tasks and resources directly affect the system performance and energy consumption. Silicon photonic interconnects are expected to address the communication and system power consumption challenges imposed on rack-scale systems. However, the control for optical interconnects can cause server performance degradation if not properly designed, especially for the complicated and time-consuming multidomain networks. In this paper, we study the optical interconnects for rack-scale computing systems and propose a new communication flow and control scheme for the efficient coordination of distributed resources. Particularly, we first propose a forward propagation strategy that parallels the path reservation process with the distributed tasks connection setup. Second, we develop a pre-emptive chain feedback (PCF) scheme to optimize multidomain path reservation. The PCF scheme pre-emptively allocates network resources with the help of multicell reservation window and quickly releases resources with a feedback mechanism. This solution increases the network resources utilization and task coordination efficiency while minimizing path reservation overheads. Comparing to the baseline InfiniBand network fabric and handshake scheme, PCF can improve network throughput greatly under uniform and hotspot traffic patterns. Realistic benchmark results show that the PCF scheme on average reduces 52% and 60% energy consumption per unit system performance than InfiniBand and the handshake scheme for a 256-node rack system.
- Subjects :
- Process (engineering)
Computer science
Distributed computing
InfiniBand
Throughput
02 engineering and technology
Energy consumption
Computer Graphics and Computer-Aided Design
020202 computer hardware & architecture
Server
0202 electrical engineering, electronic engineering, information engineering
Benchmark (computing)
Electrical and Electronic Engineering
Software
Efficient energy use
Subjects
Details
- ISSN :
- 19374151 and 02780070
- Volume :
- 39
- Database :
- OpenAIRE
- Journal :
- IEEE Transactions on Computer-Aided Design of Integrated Circuits and Systems
- Accession number :
- edsair.doi...........51ca8331f8725d463ce50cadc41a93a0
- Full Text :
- https://doi.org/10.1109/tcad.2019.2894810