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LoPC

Matthew I. Frank, Anant Agarwal, Mary K. Vernon
1997 Proceedings of the sixth ACM SIGPLAN symposium on Principles and practice of parallel programming - PPOPP '97  
This thesis describes the LoPC model, which is inspired by the LogP model, but which accounts for contention in message passing algorithms on a multiprocessor or network of workstations communicating via  ...  Parallel algorithm designers need computational models that take first order system costs into account, but that are also simple enough to use in practice.  ...  The goal of this thesis is to create a new model for analyzing parallel algorithms, LoPC, that provides accurate predictions of contention costs.  ... 
doi:10.1145/263764.263803 dblp:conf/ppopp/FrankAV97 fatcat:hldl7ochq5ajdgtxvuipixqawe

LoPC

Matthew I. Frank, Anant Agarwal, Mary K. Vernon
1997 SIGPLAN notices  
This paper introduces the LoPC model, which is inspired by the LogP model but accounts for contention for message processing resources in parallel algorithms on a multiprocessor or network of workstations  ...  Parallel algorithm designers need computational models that take first order system costs into account, but are also simple enough to use in practice.  ...  This research was supported in part by ARPA contract #N00014-94-1-0985, NSF grants #MIP-9504399, #CDA-9024618, #CCR-9024144 and #GER-9550429 and by Matthew Frank's NSF Graduate Research Fellowship.  ... 
doi:10.1145/263767.263803 fatcat:nm4x4lfrzfhkrmrx6qlrg7tora

Aggregates and their distributions determined from LOPC observations made using an autonomous profiling float

Colleen M. Petrik, George A. Jackson, David M. Checkley
2013 Deep Sea Research Part I: Oceanographic Research Papers  
We have been studying the distribution and flux of these particles using the SOLOPC, a profiling Lagrangian (SOLO) float with a Laser Optical Particle Counter (LOPC).  ...  Observations included a lognormal-shaped fraction in the normalized volume distribution similar to that observed in results for simulations of particles in the euphotic zone.  ...  Perry for the chance to participate in North Atlantic Bloom Experiment on the RV Knorr in 2008 and the CCE LTER program for work on the R/V Thompson in 2007.  ... 
doi:10.1016/j.dsr.2012.12.009 fatcat:urgsahbnlrewtpjxxjp2ke6pum

LoGPG: Modeling network contention in message-passing programs

C.A. Moritz, M.I. Frank
2001 IEEE Transactions on Parallel and Distributed Systems  
This paper presents a new cost model, called LoGPC, that extends the LogP [9] and LogGP [4] models to account for the impact of network contention and network interface DMA behavior on the performance  ...  In addition, we show that the impact of communication locality on the communication costs is at most a factor of two on Alewife.  ...  RELATED WORK The LogP model [9] is a simple parallel machine model intended to serve as a basis for developing portable parallel algorithms.  ... 
doi:10.1109/71.920589 fatcat:h3arcgip7rhs5n2hxy3l3ngieq

LoGPC

Csaba Andras Moritz, Matthew I. Frank
1998 Performance Evaluation Review  
This paper presents a new cost model, called LoGPC, that extends the LogP [9] and LogGP [4] models to account for the impact of network contention and network interface DMA behavior on the performance  ...  In addition, we show that the impact of communication locality on the communication costs is at most a factor of two on Alewife.  ...  RELATED WORK The LogP model [9] is a simple parallel machine model intended to serve as a basis for developing portable parallel algorithms.  ... 
doi:10.1145/277858.277933 fatcat:ddcgz6e7wrfdtcddsmao53lfzq

LoGPC

Csaba Andras Moritz, Matthew I. Frank
1998 Proceedings of the 1998 ACM SIGMETRICS joint international conference on Measurement and modeling of computer systems - SIGMETRICS '98/PERFORMANCE '98  
This paper presents a new cost model, called LoGPC, that extends the LogP [9] and LogGP [4] models to account for the impact of network contention and network interface DMA behavior on the performance  ...  In addition, we show that the impact of communication locality on the communication costs is at most a factor of two on Alewife.  ...  RELATED WORK The LogP model [9] is a simple parallel machine model intended to serve as a basis for developing portable parallel algorithms.  ... 
doi:10.1145/277851.277933 dblp:conf/sigmetrics/MoritzF98 fatcat:sos664me45aenhnkgiuyssameq

The next generation of Optical Plankton Counter: the Laser-OPC

A. W. Herman
2004 Journal of Plankton Research  
The LOPC-measured shape profiles from the same LOPC/net tows clearly show copepods and appendages and, in some cases, euphausiids.  ...  Using a narrow laser beam and new sampling geometry, the LOPC is now capable of working in plankton densities of 10 6 m À3 , nearly 100 times greater than its predecessor, the OPC, and is also capable  ...  in time, either partially or totally, then the algorithm assumes that it is measuring an MEP.  ... 
doi:10.1093/plankt/fbh095 fatcat:zbqekdghzvbxne2j4gwdeuybje

Quantitative Analysis of Solubility Parameters and Surface Properties of Larch Bark Proanthocyanidins

Siqi Chen, Jie Song, Liuping Du, Yanli Ma, Shixue Ren, Junxue Ren, Shujun Li
2020 Polymers  
The experimentally measured solubility parameters of LPPCs and LOPCs (20.5 and 22.09 (J/m−3)0.5, respectively) were in good agreement with the solubility parameters determined by molecular dynamics simulations  ...  This study provides theoretical and technical support for the use of larch bark proanthocyanidins, which are non-toxic, renewable, and have good ultraviolet resistance, in the field of blending composites  ...  Each sample was injected three times in parallel and the average value was used for the calculations.  ... 
doi:10.3390/polym12122800 pmid:33256072 pmcid:PMC7761477 fatcat:7c242s4bxrahjnyhbn46yxuk4i

$\log_{\rm n}{\rm P}$ and $\log_{3}{\rm P}$: Accurate Analytical Models of Point-to-Point Communication in Distributed Systems

Kirk W. Cameron, Rong Ge, Xian-he Sun
2007 IEEE transactions on computers  
We illustrate the utility of the model in three ways: 1) to derive a simplified, useful, more accurate model of point-to-point communication in clusters of SMPs, 2) to predict and analyze point-to-point  ...  Many existing models of point-to-point communication in distributed systems ignore the impact of memory and middleware. Including such details may make these models impractical.  ...  LoPC and LoGPC model contention in the interrupt queues among all network interfaces involved in communication for small and large messages, respectively.  ... 
doi:10.1109/tc.2007.38 fatcat:4xr2pexpj5dwpnob7bgrb44mqa

Adaptive Performance Modeling on Hierarchical Grid Computing Environments

Wahid Nasri, Luiz Angelo Steffenel, Denis Trystram
2007 Seventh IEEE International Symposium on Cluster Computing and the Grid (CCGrid '07)  
In the past, efficient parallel algorithms have always been developed specifically for the successive generations of parallel systems (vector machines, shared-memory machines, distributed-memory machines  ...  Toward this goal, we propose a generic framework based on communication models and adaptive approaches in order to adaptively model performances on grid computing environments.  ...  We begin, in section 2, by presenting the architectural model of the target parallel and distributed system and the performance evaluation models of a parallel algorithm.  ... 
doi:10.1109/ccgrid.2007.17 dblp:conf/ccgrid/NasriST07 fatcat:mwvet4iduzb5vhapzitjlbhf6a

Adaptive approaches for efficient parallel algorithms on cluster-based systems

Wahid Nasri, Luiz Angelo Steffenel, Denis Trystram
2009 International Journal of Grid and Utility Computing  
His research interests are in high performance computing, including performance modeling, the design of efficient parallel algorithms, scheduling and load balancing for cluster computing.  ...  Currently, he is looking for models and adaptive techniques for modeling performances and adapting parallel poly-algorithms on grid environments.  ...  ACKNOWLEDGEMENTS Experiments presented in this paper were carried out using the Grid'5000 experimental testbed, an initiative from the French Ministry of Research through the ACI GRID incentive action,  ... 
doi:10.1504/ijguc.2009.022026 fatcat:qmld36stsjakjg75hs6qyuidry

Sinking Organic Particles in the Ocean—Flux Estimates From in situ Optical Devices

Sarah Lou Carolin Giering, Emma Louise Cavan, Sünnje Linnéa Basedow, Nathan Briggs, Adrian B. Burd, Louise J. Darroch, Lionel Guidi, Jean-Olivier Irisson, Morten H. Iversen, Rainer Kiko, Dhugal Lindsay, Catarina R. Marcolin (+6 others)
2020 Frontiers in Marine Science  
In particular, advances are needed to enable the optimal translation of imaged objects into carbon content and sinking velocities.  ...  In addition, different devices often measure different optical properties, leading to difficulties in comparing results.  ...  ACKNOWLEDGMENTS We thank the Scientific Committee on Oceanic Research (SCOR) and all members of the Working Group 150 (TOMCAT: Translation of Optical Measurements into particle Content, Aggregation & Transfer  ... 
doi:10.3389/fmars.2019.00834 fatcat:xb2kjktaj5bv7pwnb5j25e4w4y

Improving Performance Models for Irregular Point-to-Point Communication [article]

Amanda Bienz, William D. Gropp, Luke N. Olson
2018 arXiv   pre-print
In this paper, a node-aware based model is presented. Furthermore, the model is extended to include communication queue search time as well as an additional parameter estimating network contention.  ...  Parallel applications are often unable to take full advantage of emerging parallel architectures due to scaling limitations, which arise due to inter-process communication.  ...  This material is based in part upon work supported by the Department of Energy, National Nuclear, under Award Number DE-NA0002374.  ... 
arXiv:1806.02030v1 fatcat:ab3342rj5re4lmswzrrycaq4cy

Accurate Analytical Models for Message Passing on Multi-core Clusters

Bibo Tu, Jianping Fan, Jianfeng Zhan, Xiaofang Zhao
2009 2009 17th Euromicro International Conference on Parallel, Distributed and Network-based Processing  
Derived from log n P and log 3 P models, new analytical models mlog n P and its reduction 2log {2,3} P are proposed to unitedly abstract memory hierarchy on multi-core clusters in vertical and horizontal  ...  strides; Horizontal memory hierarchy has become more prominent due to distinct performance among three levels of communication in a multi-core cluster: intra-CMP, inter-CMP and inter-node, which should  ...  Cost prediction of Collective Communication In this section, we use 2log {2,3} P model to analyze common collective communication algorithms, linear broadcast algorithm and binomial tree broadcast algorithm  ... 
doi:10.1109/pdp.2009.18 dblp:conf/pdp/TuFZZ09 fatcat:qnrk227sq5c4zbeg3yewzw7wky

Memory Aware Load Balance Strategy on a Parallel Branch-and-Bound Application [article]

Juliana M. N. Silva and Cristina Boeres and Lúcia M. A. Drummond and Artur A. Pessoa
2013 arXiv   pre-print
In this paper, the Multicore Cluster Model (MCM) is proposed, which captures the most relevant performance characteristics in multicores systems such as the influence of memory hierarchy and contention  ...  bottlenecks, as for example, memory contention.  ...  LoPC [27] addresses contention problem that arises when sending messages in multiprocessors, i.e considers the sharing of global memory between processors.  ... 
arXiv:1302.5679v1 fatcat:ykifvbysnrelfbjvtsgxiyy2om
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