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A Proactive System for Voltage-Droop Mitigation in a 7-nm Hexagon™ Processor
IEEE Journal of Solid-State Circuits ( IF 4.6 ) Pub Date : 2020-12-30 , DOI: 10.1109/jssc.2020.3043786 Vijay Kiran Kalyanam , Eric Mahurin , Keith A. Bowman , Jacob A. Abraham
IEEE Journal of Solid-State Circuits ( IF 4.6 ) Pub Date : 2020-12-30 , DOI: 10.1109/jssc.2020.3043786 Vijay Kiran Kalyanam , Eric Mahurin , Keith A. Bowman , Jacob A. Abraham
A proactive clock-gating system (PCGS) in a 7-nm Qualcomm
® Hexagon™ digital signal processor (DSP) improves performance or energy efficiency by reducing the magnitude of supply voltage (
$V_{\mathrm {DD}}$
) droops. The PCGS integrates a digital power meter (DPM) to monitor the power per cycle based on microarchitectural events and a voltage-clock-gating (VCG) circuit with a power-delivery-network (PDN) model to predict the $V_{\mathrm {DD}}$ response to DPM power changes. When the PDN model anticipates a potential $V_{\mathrm {DD}}$
-droop violation, the VCG adapts the clock frequency (
$F_{\mathrm {CLK}}$
) by gating the global clock to reduce the actual $V_{\mathrm {DD}}$
-droop magnitude. Silicon measurements of the PCGS in the 7-nm DSP demonstrate a 10% higher $F_{\mathrm {CLK}}$ or 5% lower $V_{\mathrm {DD}}$
.
中文翻译:
主动式系统,可减轻7纳米Hexagon™处理器的电压降
在7纳米高通公司甲主动时钟门控系统(PCGS) ®六角™数字信号处理器(DSP)通过降低电源电压的幅度(提高性能或能量效率 $ V _ {\ mathrm {DD}} $
)下垂。PCGS集成了一个基于微体系结构事件的数字功率计(DPM)来监视每个周期的功率,以及一个带有时钟时钟门控(VCG)电路和功率传递网络(PDN)模型的电源,以预测功率的变化。 $ V _ {\ mathrm {DD}} $ 对DPM功率变化的响应。当PDN模型预期有潜力时 $ V _ {\ mathrm {DD}} $
违反下垂,VCG会调整时钟频率(
$ F _ {\ mathrm {CLK}} $
)通过设置全局时钟来减少实际 $ V _ {\ mathrm {DD}} $
下降幅度。7纳米DSP中PCGS的硅测量结果显示高出10% $ F _ {\ mathrm {CLK}} $ 或降低5% $ V _ {\ mathrm {DD}} $
。
更新日期:2020-12-30
中文翻译:
主动式系统,可减轻7纳米Hexagon™处理器的电压降
在7纳米高通公司甲主动时钟门控系统(PCGS) ®六角™数字信号处理器(DSP)通过降低电源电压的幅度(提高性能或能量效率