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2013 18th Asia and South Pacific Design Automation Conference (ASP-DAC)最新文献

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SMYLEref: A reference architecture for manycore-processor SoCs SMYLEref:多核处理器soc的参考体系结构
Pub Date : 2013-04-29 DOI: 10.1109/ASPDAC.2013.6509656
Masaaki Kondo, S. Nguyen, Tomoya Hirao, T. Soga, Hiroshi Sasaki, Koji Inoue
Nowadays, the trend of developing micro-processor with tens of cores brings a promising prospect for embedded systems. Realizing a high performance and low power many-core processor is becoming a primary technical challenge. We are currently developing a many-core processor architecture for embedded systems as a part of a NEDO's project. This paper introduces the many-core architecture called SMYLEref along whit the concept of Virtual Accelerator on Many-core, in which many cores on a chip are utilized as a hardware platform for realizing multiple virtual accelerators. We are developing its prototype system with off-the-shelf FPGA evaluation boards. In this paper, we introduce the architecture of SMYLEref and the detail of the prototype system. In addition, several initial experiments with the prototype system are also presented.
目前,数十核微处理器的发展趋势为嵌入式系统带来了广阔的前景。实现高性能、低功耗的多核处理器已成为一个主要的技术挑战。作为NEDO项目的一部分,我们目前正在为嵌入式系统开发一种多核处理器架构。本文介绍了SMYLEref多核架构以及多核虚拟加速器的概念,即利用一个芯片上的多个核作为硬件平台来实现多个虚拟加速器。我们正在用现成的FPGA评估板开发其原型系统。在本文中,我们介绍了SMYLEref的体系结构和原型系统的细节。此外,还介绍了原型系统的几个初步实验。
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引用次数: 11
High performance PIN Ge photodetector and Si optical modulator with MOS junction for photonics-electronics convergence system 用于光电子会聚系统的高性能PIN - Ge光电探测器和MOS结Si光调制器
Pub Date : 2013-04-29 DOI: 10.1109/ASPDAC.2013.6509674
J. Fujikata, M. Noguchi, M. Miura, Masashi Takahashi, Shigeki Takahashi, T. Horikawa, Y. Urino, Takahiro Nakamura, Y. Arakawa
We report on a high speed silicon-waveguide-integrated PIN Ge photodetector of 45 GHz bandwidth, and a high efficiency of 0.3 V·cm silicon optical modulator with a metal-oxide-semiconductor (MOS) junction by applying the low optical loss and high conductivity poly-silicon gate. These OE/EO devices enable low drive voltage of around 1V, which would contribute to a high density optical interposer of the future photonics-electronics convergence system.
本文报道了一种45 GHz带宽的高速硅波导集成PIN - Ge光电探测器,以及一种效率为0.3 V·cm的金属氧化物半导体(MOS)结硅光调制器,该调制器采用低光损耗和高电导多晶硅栅极。这些OE/EO器件可以实现约1V的低驱动电压,这将有助于未来光电子融合系统的高密度光学介面器。
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引用次数: 5
A ring-VCO-based sub-sampling PLL CMOS circuit with 0.73 ps jitter and 20.4 mW power consumption 基于环形vco的分采样锁相环CMOS电路,抖动0.73 ps,功耗20.4 mW
Pub Date : 2013-04-29 DOI: 10.1109/ASPDAC.2013.6509576
Kenta Sogo, A. Toya, T. Kikkawa
This paper presents a ring voltage-controlledoscillator (ring-VCO)-based sub-sampling phase locked loop(PLL) CMOS circuit with low phase noise and low jitter. A 2.08 GHz PLL is developed by use of 65 nm CMOS technology. The in-band phase noise is -119.1 dBc/Hz at 1 MHz and the output jitter integrated from 1 kHz to 10 MHz is 0.73 ps (rms) with the power consumpition 20.4 mW. The normalized jitter-power product is -229.7 dB.
提出了一种基于环压控振荡器的低相位噪声和低抖动的分采样锁相环(PLL) CMOS电路。采用65纳米CMOS技术,研制了一种2.08 GHz的锁相环。在1mhz时,带内相位噪声为-119.1 dBc/Hz,在1khz到10mhz范围内集成的输出抖动为0.73 ps (rms),功耗20.4 mW。归一化抖动功率积为-229.7 dB。
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引用次数: 5
VISA synthesis: Variation-aware Instruction Set Architecture synthesis VISA综合:变化感知指令集体系结构综合
Pub Date : 2013-04-29 DOI: 10.1109/ASPDAC.2013.6509603
Yuko Hara-Azumi, Takuya Azumi, N. Dutt
We present VISA: a novel Variation-aware Instruction Set Architecture synthesis approach that makes effective use of process variation from both software and hardware points of view. To achieve an efficient speedup, VISA selects custom instructions based on statistical static timing analysis (SSTA) for aggressive clocking. Furthermore, with minimum performance overhead, VISA dynamically detects and corrects timing faults resulting from aggressive clocking of the underlying processor. This hybrid software/hardware approach generates significant speedup without degrading the yield. Our experimental results on commonly used ISA synthesis benchmarks demonstrate that VISA achieves significant performance improvement compared with a traditional deterministic worst case-based approach (up to 78.0%) and an existing SSTA-based approach (up to 49.4%).
我们提出了VISA:一种新颖的变化感知指令集体系结构综合方法,从软件和硬件的角度有效地利用过程变化。为了实现高效的加速,VISA选择基于统计静态时序分析(SSTA)的自定义指令进行主动时钟。此外,在性能开销最小的情况下,VISA可以动态地检测和纠正由底层处理器的主动时钟导致的定时错误。这种软件/硬件混合方法在不降低产量的情况下产生了显著的加速。我们在常用的ISA综合基准上的实验结果表明,与传统的基于确定性最坏情况的方法(高达78.0%)和现有的基于ssta的方法(高达49.4%)相比,VISA实现了显著的性能改进。
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引用次数: 3
WUCC: Joint WCET and Update Conscious Compilation for cyber-physical systems WUCC:网络物理系统的联合WCET和更新意识编译
Pub Date : 2013-04-29 DOI: 10.1109/ASPDAC.2013.6509560
Yazhi Huang, Mengying Zhao, C. Xue
The cyber-physical system (CPS) is a desirable computing platform for many industrial and scientific applications. However, the application of CPSs has two challenges: First, CPSs often include a number of sensor nodes. Update of preloaded code on remote sensor nodes powered by batteries is extremely energy-consuming. The code update issue in the energy sensitive CPS must be carefully considered; Second, CPSs are often real-time embedded systems with real-time properties. Worst-Case Execution Time (WCET) is one of the most important metrics in real-time system design. While existing works only consider one of these two challenges at a time, in this paper, a compiler-level optimization, Joint WCET and Update Conscious Compilation (WUCC), is proposed to jointly consider WCET and code update for cyber-physical systems. The novelty of the proposed approach is that the WCET problem and code update problem are considered concurrently such that a balanced solution with minimal WCET and minimal code difference can be achieved. The experimental results show that the proposed technique can minimize WCET and code difference effectively.
信息物理系统(CPS)是许多工业和科学应用的理想计算平台。然而,cps的应用面临两个挑战:首先,cps通常包含许多传感器节点。更新由电池供电的远程传感器节点上的预加载代码是非常消耗能量的。必须仔细考虑能源敏感型CPS的守则更新问题;其次,cps通常是具有实时属性的实时嵌入式系统。最坏情况执行时间(WCET)是实时系统设计中最重要的指标之一。虽然现有的工作一次只考虑这两个挑战中的一个,但本文提出了一种编译器级优化,即联合WCET和更新意识编译(WUCC),以共同考虑网络物理系统的WCET和代码更新。该方法的新颖之处在于同时考虑了WCET问题和代码更新问题,从而可以实现具有最小WCET和最小代码差异的平衡解决方案。实验结果表明,该方法能有效地减小WCET和码差。
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引用次数: 3
Improving energy efficiency for energy harvesting embedded systems 提高能源收集嵌入式系统的能源效率
Pub Date : 2013-04-29 DOI: 10.1109/ASPDAC.2013.6509645
Yang Ge, Yukan Zhang, Qinru Qiu
While the energy harvesting system (EHS) supplies green energy to the embedded system, it also suffers from uncertainty and large variation in harvesting rate. This constraint can be remedied by using efficient energy storage. Hybrid Electrical Energy Storage (HEES) system is proposed recently as a cost effective approach with high power conversion efficiency and low self-discharge. In this paper, we propose a fast heuristic algorithm to improve the efficiency of charge allocation and replacement in an EHS/HEES equipped embedded system. The goal of our algorithm is to minimize the energy overhead on the DC-DC converter while satisfying the task deadline constraints of the embedded workload and maximizing the energy stored in the HEES system. We first provide an approximated but accurate power consumption model of the DC-DC converter. Based on this model, the optimal operating point of the system can be analytically solved. Integrated with the dynamic reconfiguration of the HEES bank, our algorithm provides energy efficiency improvement and runtime overhead reduction compared to previous approaches.
能量收集系统(EHS)在为嵌入式系统提供绿色能源的同时,也存在不确定性和采收率变化较大的问题。这种限制可以通过使用高效的能量存储来弥补。混合储能系统作为一种具有高功率转换效率和低自放电的低成本储能方法,近年来被提出。为了提高EHS/HEES嵌入式系统中电荷分配和替换的效率,提出了一种快速启发式算法。该算法的目标是在满足嵌入式工作负载的任务期限约束的同时,使DC-DC变换器的能量开销最小化,并使HEES系统中存储的能量最大化。我们首先提供了一个近似但准确的DC-DC转换器的功耗模型。基于该模型,可以解析求解出系统的最优工作点。与以前的方法相比,我们的算法与HEES库的动态重构相结合,提供了能源效率的提高和运行时开销的减少。
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引用次数: 7
Manycore processor for video mining applications 用于视频挖掘应用的多核处理器
Pub Date : 2013-04-29 DOI: 10.1109/ASPDAC.2013.6509659
Y. Matsumoto, H. Uchida, M. Hagimoto, Yasumori Hibi, S. Torii, Masamichi Izumida
Through Architecture-Algorithm co-design for Video Mining Applications we designed a scalable Manycore processor consists of clustered heterogeneous cores with stream processing capabilities, and zero-overhead inter-process communication through FIFO with a hardware-software mechanism. For achieving high-performance and low-power consumption, especially so as to reduce memory access required for Video Mining Applications, each application is partitioned to exploit both task and data parallelism, and programmed as a distributed stream processing with relatively large local register-file based on Kahn Process Network model.
通过视频挖掘应用的架构-算法协同设计,我们设计了一个可扩展的多核处理器,该处理器由具有流处理能力的集群异构内核组成,并通过具有硬件软件机制的FIFO实现零开销的进程间通信。为了实现高性能和低功耗,特别是为了减少视频挖掘应用程序所需的内存访问,基于Kahn进程网络模型,对每个应用程序进行分区,利用任务和数据并行性,并将其编程为具有较大本地寄存器文件的分布式流处理。
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引用次数: 6
Signal integrity modeling and measurement of TSV in 3D IC 三维集成电路中TSV信号完整性建模与测量
Pub Date : 2013-04-29 DOI: 10.1109/ASPDAC.2013.6509551
Joohee Kim, Joungho Kim
In order to guarantee signal integrity of a TSV-based channel in 3D IC design, the modeling and measurements are conducted for electrical characterization of the TSV-based channel including TSVs and RDLs with various performance metrics such as insertion loss, noise coupling and eye diagrams. Based on the modeling and measurements of the fabricated TSV channels, design guide for the signal integrity of the channel is proposed.
为了保证基于tsv的通道在3D IC设计中的信号完整性,对基于tsv的通道进行了建模和测量,包括tsv和rdl,具有各种性能指标,如插入损耗、噪声耦合和眼图。在对制造的TSV通道进行建模和测量的基础上,提出了通道信号完整性的设计准则。
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引用次数: 12
ShieldUS: A novel design of dynamic shielding for eliminating 3D TSV crosstalk coupling noise ShieldUS:一种新颖的动态屏蔽设计,用于消除3D TSV串扰耦合噪声
Pub Date : 2013-04-29 DOI: 10.1109/ASPDAC.2013.6509678
Yuan-Ying Chang, Yoshi Shih-Chieh Huang, N. Vijaykrishnan, C. King
3D IC is a promising technology to meet the demands of high throughput, high scalability, and low power consumption for future generation integrated circuits. One way to implement the 3D IC is to interconnect layers of two-dimensional (2D) IC with Through-Silicon Via (TSV), which shortens the signal lengths. Unfortunately, while TSVs are bundled together as a cluster, the crosstalk coupling noise may lead to transmission errors. As a result, the working frequency of TSVs has to be lowered to avoid the errors, leading to narrower bandwidth that TSVs can provide. In this paper, we first derive the crosstalk noise model from the perspective of 3D chip and then propose ShieldUS, a runtime data-to-TSVs remapping strategy. With ShieldUS, the transition patterns of data over TSVs are observed at runtime, and relatively stable bits will be mapped to the TSVs which act as shields to protect the other bits which have more fluctuations. We evaluate the performance of ShieldUS with address lines from real benchmark traces and data lines of different similarities. The results show that ShieldUS is accurate and flexible. We further study dynamic shielding and our design of Interval Equilibration Unit (IEU) can intelligently select suitable parameters for dynamic shielding, which makes dynamic shielding practical and does not need to predefine parameters. This also improves the practicability of ShieldUS.
3D集成电路是一种很有前途的技术,可以满足未来一代集成电路对高吞吐量、高可扩展性和低功耗的需求。实现3D IC的一种方法是将二维(2D) IC层与通硅通孔(TSV)互连,从而缩短信号长度。不幸的是,当tsv作为一个集群捆绑在一起时,串扰耦合噪声可能导致传输误差。因此,为了避免误差,必须降低tsv的工作频率,从而导致tsv可以提供的带宽更窄。本文首先从三维芯片的角度推导了串扰噪声模型,然后提出了一种运行时数据到tsv的重映射策略ShieldUS。使用ShieldUS,在运行时观察tsv上数据的转换模式,相对稳定的位将被映射到tsv上,tsv作为屏蔽来保护其他波动较大的位。我们使用真实基准跟踪和不同相似度的数据线的地址线来评估ShieldUS的性能。结果表明,该系统具有精确、灵活的特点。进一步对动态屏蔽进行了研究,所设计的区间均衡单元(IEU)可以智能选择合适的动态屏蔽参数,使动态屏蔽不需要预先设定参数,实现了实用化。这也提高了盾盾的实用性。
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引用次数: 19
A novel cell placement algorithm for flexible TFT circuit with mechanical strain and temperature consideration 一种考虑机械应变和温度的柔性TFT电路单元放置算法
Pub Date : 2013-04-29 DOI: 10.1109/ASPDAC.2013.6509644
Jiun-Li Lin, Po-Hsun Wu, Tsung-Yi Ho
Mobility is the key device parameter to affect circuit performance in flexible thin-film transistor (TFT) technologies, and it is very sensitive to the change of mechanical strain and temperature. However, existing algorithms only consider the impact of mechanical strain in cell placement of flexible TFT circuit. Without taking temperature into consideration, mobility may be dramatically decreased which leads to circuit performance degradation. This paper presents the first work to reduce the mobility influence caused by the change of both mechanical strain and temperature. Experimental results show that the proposed algorithms can effectively reduce the chip temperature and the influence caused by mobility variation.
在柔性薄膜晶体管(TFT)技术中,迁移率是影响电路性能的关键器件参数,对机械应变和温度的变化非常敏感。然而,现有的算法只考虑了柔性TFT电路放置单元时机械应变的影响。如果不考虑温度,迁移率可能会急剧下降,从而导致电路性能下降。本文提出了降低机械应变和温度变化对合金迁移率影响的初步研究工作。实验结果表明,该算法能有效降低芯片温度和迁移率变化带来的影响。
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引用次数: 4
期刊
2013 18th Asia and South Pacific Design Automation Conference (ASP-DAC)
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