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Power Capping: What Works, What Does Not

Pavlos Petoumenos, Lev Mukhanov, Zheng Wang, Hugh Leather, Dimitrios S. Nikolopoulos
2015 2015 IEEE 21st International Conference on Parallel and Distributed Systems (ICPADS)  
We also explore possible alternative power capping mechanisms beyond what has been previously proposed and evaluate them under the same setup.  ...  Our results provide interesting insights regarding the different trade-offs of power capping techniques, which will be useful for designing and implementing highly efficient power capping in the future  ...  Thread packing is still useful for the cases where forced idleness does not work as intended or for the cases where using the maximum number of cores is not the most energy efficient choice.  ... 
doi:10.1109/icpads.2015.72 dblp:conf/icpads/PetoumenosMWLN15 fatcat:hb5qce4rtjdvbpp6titl63sfsi

Maximizing Performance Under a Power Cap

Huazhe Zhang, Henry Hoffmann
2016 Proceedings of the Twenty-First International Conference on Architectural Support for Programming Languages and Operating Systems - ASPLOS '16  
In this work we propose PUPiL, a hybrid software/hardware power capping system. Unlike previous approaches, PUPiL combines hardware's fast reaction time with software's flexibility.  ...  In contrast, hardware power capping quickly converges to the the power cap, but only manages voltage and frequency, limiting its potential performance.  ...  Government under the DARPA BRASS program, by the Dept. of Energy under DOE DE-AC02-06CH11357, by the NSF under CCF 1439156, and by a DOE Early Career Award.  ... 
doi:10.1145/2872362.2872375 dblp:conf/asplos/ZhangH16 fatcat:dvbnpympnzdkrau4bpt7jntnq4

Maximizing Performance Under a Power Cap

Huazhe Zhang, Henry Hoffmann
2016 ACM SIGOPS Operating Systems Review  
In this work we propose PUPiL, a hybrid software/hardware power capping system. Unlike previous approaches, PUPiL combines hardware's fast reaction time with software's flexibility.  ...  In contrast, hardware power capping quickly converges to the the power cap, but only manages voltage and frequency, limiting its potential performance.  ...  Government under the DARPA BRASS program, by the Dept. of Energy under DOE DE-AC02-06CH11357, by the NSF under CCF 1439156, and by a DOE Early Career Award.  ... 
doi:10.1145/2954680.2872375 fatcat:zjoz2d4md5cvveva5lp6stzwvy

Maximizing Performance Under a Power Cap

Huazhe Zhang, Henry Hoffmann
2016 SIGARCH Computer Architecture News  
In this work we propose PUPiL, a hybrid software/hardware power capping system. Unlike previous approaches, PUPiL combines hardware's fast reaction time with software's flexibility.  ...  In contrast, hardware power capping quickly converges to the the power cap, but only manages voltage and frequency, limiting its potential performance.  ...  Government under the DARPA BRASS program, by the Dept. of Energy under DOE DE-AC02-06CH11357, by the NSF under CCF 1439156, and by a DOE Early Career Award.  ... 
doi:10.1145/2980024.2872375 fatcat:23vzzg2mkbajlkos2uoom7sdze

Maximizing Performance Under a Power Cap

Huazhe Zhang, Henry Hoffmann
2016 SIGPLAN notices  
In this work we propose PUPiL, a hybrid software/hardware power capping system. Unlike previous approaches, PUPiL combines hardware's fast reaction time with software's flexibility.  ...  In contrast, hardware power capping quickly converges to the the power cap, but only manages voltage and frequency, limiting its potential performance.  ...  Government under the DARPA BRASS program, by the Dept. of Energy under DOE DE-AC02-06CH11357, by the NSF under CCF 1439156, and by a DOE Early Career Award.  ... 
doi:10.1145/2954679.2872375 fatcat:atrmpd43hzd4td5bcgqhufzrwy

Benefits in Relaxing the Power Capping Constraint

Daniele Cesarini, Andrea Bartolini, Luca Benini
2017 Proceedings of the 1st Workshop on AutotuniNg and aDaptivity AppRoaches for Energy efficient HPC Systems - ANDARE '17  
In this manuscript we evaluate the impact of HW power capping mechanisms on a real scientific application composed by parallel execution.  ...  By comparing HW capping mechanism against static frequency allocation schemes we show that a speed up can be achieved if the power constraint is enforced in average, during the application run, instead  ...  ACKNOWLEDGMENTS Work supported by the EU FETHPC project ANTAREX (g.a. 671623), EU project ExaNoDe (g.a. 671578), and EU ERC Project MULTI-THERMAN (g.a. 291125).  ... 
doi:10.1145/3152821.3152878 dblp:conf/IEEEpact/CesariniBB17 fatcat:bwulgarainbxdnicrnx7yn5iwm

About farmers' bargaining power within the new CAP

Beatriz Velázquez, Bruno Buffaria
2017 Agricultural and Food Economics  
The main research question here is if the current setting does, or does not, allow attaining the objective of strengthening the bargaining power of producers, while at the same time avoiding the creation  ...  of monopoly power.  ...  The main research question here is if the current setting does, or does not, allow attaining the objective of strengthening the bargaining power of producers, while at the same time avoiding the creation  ... 
doi:10.1186/s40100-017-0084-y fatcat:bvovjxfdvvdipnyl4ps6vqblku

Market Power in Double Price Cap electricity Market

Seyed Saeid Mohtavipour, Amir Hossein Gholami
2016 Bulletin de la Société royale des sciences de Liège  
In this paper, we examine double price cap electricity market from the viewpoint of non-pivotal firms.  ...  Collusive scarcity is developed by abolishing the widespread assumption that non-pivotal firms have not enjoyed a strategic behaviour of capacity withholding.  ...  However, electricity industry is a critical system on both technical and economical ground that a simple auction algorithm does not properly tackle the underlying abuse of market power.  ... 
doi:10.25518/0037-9565.5267 fatcat:rqx6ktljjnar7pb65fncixwlba

Investigating power capping toward energy-efficient scientific applications

Azzam Haidar, Heike Jagode, Phil Vaccaro, Asim YarKhan, Stanimire Tomov, Jack Dongarra
2018 Concurrency and Computation  
working within the power constraints of modern and future high-performance computing (HPC) systems.  ...  To investigate potential power savings, a power management framework must be used for dynamic power monitoring and power capping.  ...  In Figure 2B , we observe that capping the power from 220 Watts down to 180 Watts does not affect the performance of dgemv.  ... 
doi:10.1002/cpe.4485 fatcat:k7iv4hplx5fqzne6kupmpjharq

CAP: Criticality analysis for power-efficient speculative multithreading

James Tuck, Wei Liu, Josep Torrellas
2007 2007 25th International Conference on Computer Design  
To improve SM's power efficiency, we note that not all the tasks that are running in a SM environment are equally critical.  ...  While Speculative Multithreading (SM) on a Chip Multiprocessor (CMP) has the ability to speed-up hard-toparallelize applications, the power inefficiency of aggressive speculation is a concern.  ...  Table does not contain the A.1→C edge, we naturally assume that A.2 is now critical.  ... 
doi:10.1109/iccd.2007.4601932 dblp:conf/iccd/TuckLT07 fatcat:i42mxr4rgzbu3nncxrw6dbfife

Auctioning vs. Grandfathering in Cap-and-Trade Systems with Market Power and Incomplete Information

Francisco Alvarez, Francisco J Andrr
2013 Social Science Research Network  
We present a model with a cap-and-trade system in which there is imperfect competition and some firm has market power.  ...  to the auction or not.  ...  What the leader does is to overstate his demand in the primary market to keep the price low.  ... 
doi:10.2139/ssrn.2362888 fatcat:xlzou74c3jg4deolc22vfkjftq

Trade & Cap

Jorge Londoño, Azer Bestavros, Nikolaos Laoutaris
2010 Proceedings of the 2010 Workshop on Economics of Networks, Systems, and Computation - NetEcon '10  
We propose Trade & Cap (T&C), an economics-inspired mechanism that incentivizes users to voluntarily coordinate their consumption of the bandwidth of a shared network link so as to converge on what they  ...  by a desirable aggregate cap on link utilization.  ...  The drawback of a strict reservation system is that it does not take advantage of the statistical multiplexing between the flows sharing the link.  ... 
doi:10.1145/1879082.1879092 fatcat:prs2ohg7knhyjbtjclylccbek4

Shutdown Policies with Power Capping for Large Scale Computing Systems [chapter]

Anne Benoit, Laurent Lefèvre, Anne-Cécile Orgerie, Issam Raïs
2017 Lecture Notes in Computer Science  
capping to avoid disruption of the system.  ...  Our models are validated through simulations on real workload traces and power measurements on real testbeds. 3  ...  Therefore, maximum power cap does not vary because it highly depends on jobs and also because the difference between P idle and P off is more important than the difference between the peaks witnessed during  ... 
doi:10.1007/978-3-319-64203-1_10 fatcat:oydi7hd63zbdxkugjaqt4n4ena

Percussion Caps

1849 Scientific American  
like purpose, and the inventor does not claim those things as new, but confines himself to the pe culiar manner of placing the valves'in the co ver and bottom of the cylinders.We know not whether this  ...  The diff erent cams are worked by suita ble gearing with the main shaft.The equilibrium valves are not new, and the manner herein described for working the val ves, is eq' uivalent to other plans tor a  ... 
doi:10.1038/scientificamerican03241849-212d fatcat:dic4duefrjdbdnspdgxjnhrrkm

Optimizing Power and Buffer Congestion on Wireless Sensor Nodes Using CAP (Coordinated Adaptive Power) Management Technique

Gauri Joshi, Prabhat Ranjan
2011 International Journal of Wireless & Mobile Networks  
With CAP management we are trying to adaptively change the power consumption of sensor nodes.  ...  The main objective of CAP Management is to save the power during normal periods and reduce the data loss due to buffer congestion (overflow) during catastrophic periods.  ...  Anshul Goel for their interest and support in this work.  ... 
doi:10.5121/ijwmn.2011.3218 fatcat:b3rrv62npnhczejygvixke5hnm
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