Voltage-Frequency Island Partitioning for GALS-based Networks-on-Chip

Ogras,; Marculescu, Diana; Choudhary,

doi:10.1109/dac.2007.375135

Cited by 38 publications

(64 citation statements)

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“…The VFI partitioning technique proposed in [6] merges PEs that are adjacent in the predetermined tile mapping; however, it is more profitable to group PEs with similar operating speed demands. Therefore, we first need to know the proper voltage/frequency value of each PE, which is determined by the precedence/deadline constraints and the workload of each task.…”

Section: Overall Design Flowmentioning

confidence: 99%

“…Ogras et al [6,7] first proposed the VFI partitioning and static voltage assignment methodology taking into account the overhead due to mcFIFO and VLC. However, they did not consider the tile mapping and routing path allocation problem.…”

Section: Related Workmentioning

confidence: 99%

“…To alleviate these problems, a VFI-based NoC design paradigm has recently been introduced [6][7][8], where an NoC is partitioned into several voltage/frequency islands (VFIs). Each island is composed of multiple tiles and is optimized with its own supply voltage and operating frequency to minimize overall energy consumption.…”

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confidence: 99%

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Communication-aware VFI partitioning for GALS-based networks-on-chip

Shin

Kim

Kwon

et al. 2011

Des Autom Embed Syst

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The voltage/frequency island (VFI) design paradigm is a practical architecture for energy-efficient networks-on-chip (NoC) systems. In VFI-based NoC systems, each island can be operated with different voltage and clock frequency and thus it is important to carefully partition processing elements (PEs) into islands based on their workloads and communications. In this paper, we propose an energy-efficient design scheme that optimizes energy consumption and hardware costs in VFI-based NoC systems. Since on-chip networks take up a substantial portion of system power budget in NoC-based systems, the proposed scheme uses communication-aware VFI partitioning and tile mapping/routing algorithms to minimize the inter-VFI communications. Experimental results show that the proposed design technique can reduce communication energy consumption by 32-51% over existing techniques and total energy consumption by 3-14%.

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Section: Overall Design Flowmentioning

confidence: 99%

Section: Related Workmentioning

confidence: 99%

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Communication-aware VFI partitioning for GALS-based networks-on-chip

Shin

Kim

Kwon

et al. 2011

Des Autom Embed Syst

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“…Many controller architectures/algorithms are proposed [12] to solve the NoC problems related to these dynamic variables. The power consumption can be controlled by a robust controller that controls the voltage and clock frequency of different voltage frequency islands [13]. To obtain accurate predictions of data flow, we also need a good model for the NoC router.…”

Section: Literature Review and Proposed Ideamentioning

confidence: 99%

State observer controller design for packets flow control in networks-on-chip

Sehgal

Chauhan

2009

J Supercomput

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Packet-switched networks-on-chips (NoCs) are efficient communication architectures for future multiprocessors system-on-chip (MP-SoC) platforms. However the run-time management of their communication, especially flow control from individual intellectual property (IP) in an NoC which contains large number of IPs, is a challenging task. This paper proposes a state space model for NoC with state observer controller in its feedback path. It is seen that controlling the input and output flow rates alone is not sufficient to stabilize the network, but it is also important to monitor the intermediate flow rates from the on-chip routers. This is possible through a state space model for the NoC. The state observer observes the flow rates from each on-chip router which are then treated as state space variables. These variables can be controlled by the poles placement in the feedback controller. The proposed mathematical model can also observe the required intermediate flow rates which cannot be measured directly (reduced state observer). With these observed states we can attach a state controller. With this controller the network can be stabilized by controlling the flow rates at the intermediate level.State observer controller design for packets flow control 299

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“…Inevitably, some designs for homogeneous are not suitable for NoC when on-die variation is taken into consideration. NoC approach offers a matchless platform for imp lementing the GA LS paradigm [4]. Second, once a link's workload has achieved its capacity, more flo ws sharing this link will cause congestion and further degrade network performance.…”

Section: Introductionmentioning

confidence: 99%

Bandwidth-based Application-Aware Multipath Routing for NoCs

Ding¹,

Yang²,

Ren³

et al. 2015

Proceedings of the International Conference on Computer Information Systems and Industrial Applications

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Abstract--Most of routing algorithms for On-chip communication are neither application-aware nor routing packets using multiple paths. In addition, they hardly consider link bandwidth variation resulting from widely applied global asynchronous local synchronous (GALS ) mechanism. In this paper, we propose a bandwidth-based application-aware multipath routing (BAMR) algorithm to assign multiple routing paths by leveraging the knowledge of application and network bandwidth features. With the increase of number of flows resulting from the split of flows, we present a new method named dynamic-amount fixed-number (DAFN) flow control mechanism to avoid deadlock. We compare our algorithm with XY, YX, an d O1TURN with synthetic traffic patterns and traffic trace of parallel implementation of H.264. Experiments demonstrate that BAMR achieves higher throughput with decrease in latency. Furthermore, the proposed algorithm achieves better workload balance by distributing traffic over multiple paths.

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Voltage-Frequency Island Partitioning for GALS-based Networks-on-Chip

Cited by 38 publications

References 0 publications

Communication-aware VFI partitioning for GALS-based networks-on-chip

Communication-aware VFI partitioning for GALS-based networks-on-chip

State observer controller design for packets flow control in networks-on-chip

Bandwidth-based Application-Aware Multipath Routing for NoCs

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