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R3-DLA (Reduce, Reuse, Recycle): A More Efficient Approach to Decoupled Look-Ahead Architectures [article]

Sushant Kondguli, Michael Huang
2018 arXiv   pre-print
Exploiting implicit parallelism to provide automatic performance improvement remains a central goal in engineering future general-purpose computing systems.  ...  One approach is to use a separate thread context to perform continuous look-ahead to improve the data and instruction supply to the main pipeline.  ...  When a branch prediction fed by LT turns out wrong, which is relatively rare (0.06 per kilo instructions), it means that LT is executing down the wrong path.  ... 
arXiv:1812.04514v3 fatcat:lqezt4digbes7jmd6nfsymkhrq

SYRANT: SYmmetric resource allocation on not-taken and taken paths

Nathanael Premillieu, Andre Seznec
2012 ACM Transactions on Architecture and Code Optimization (TACO)  
Une nouvelle technique exploitant l'indépendance de contrôle est présentée dans ce rapport.  ...  Ainsi, lors d'une mauvaise prédiction, le travail déjà effectué sur le mauvais chemin et situé après le point de reconvergence peut être conservé.  ...  The speculative execution of the branches on the wrong path could be exploited to enhance branch prediction after branch misprediction recovery.  ... 
doi:10.1145/2086696.2086722 fatcat:bnkn3hbuxjcalcnp4zeijhg4oq

The impact of incorrectly speculated memory operations in a multithreaded architecture

R. Sendag, Ying Chen, D.J. Lilja
2005 IEEE Transactions on Parallel and Distributed Systems  
The speculated execution of threads in a multithreaded architecture, plus the branch prediction used in each thread execution unit, allows many instructions to be executed speculatively, that is, before  ...  We find that incorrect speculation (wrong execution) on the instruction and thread-level provides an indirect prefetching effect for the later correct execution paths and threads.  ...  Their suggestions helped us to improve the presentation of this paper significantly.  ... 
doi:10.1109/tpds.2005.36 fatcat:prajemixvvhvjokg67ai2hgtsq

CIRC-PACK_D6.4_Legislative barriers for the recycling of fossil based and biobased plastics for packaging and policy recommendations

CIRC-PACK
2020 Zenodo  
CIRC-PACK WP6 (task 6.3): Legislative barriers for the recycling of fossil based and biobased plastics for packaging and policy recommendations  ...  A wrong method of sorting could be a risk for health and safety.  ...  Plastics packaging is a priority area when it comes to design for recyclability. one of the keys to improve recycling levels.  ... 
doi:10.5281/zenodo.3922070 fatcat:jshxewwpo5dr7hdlbdxcty6iey

Coming challenges in microarchitecture and architecture

R. Ronen, A. Mendelson, K. Lai, Shih-Lien Lu, F. Pollack, J.P. Shen
2001 Proceedings of the IEEE  
Furthermore, as CMOS technology continues to advance, microprocessor design is exposed to a new set of challenges.  ...  While the pace of this progress has been quite impressive over the last two decades, it has become harder and harder to keep up this pace.  ...  When the branch is resolved, the wrong path is flushed. Eager execution should use a confidence mechanism to determine the likelihood of a branch to be mispredicted [32] .  ... 
doi:10.1109/5.915377 fatcat:iywintmu5jeltngkqn6h3ryh7u

Architecture of Embedded Microprocessors [chapter]

Eric Rotenberg, Aravindh Anantaraman
2005 Multiprocessor Systems-on-Chips  
Data-level parallelism and regular control flow in streaming applications has led engineers to base many DSPs on the very long instruction word (VLIW) execution model [149], which encodes regular parallelism  ...  in an efficient and predictable way.  ...  In power-constrained embedded systems, performance gains of branch prediction must be weighed against the waste of power caused by squashing wrong-path instructions. 4-11 FIGURE An incorrect branch  ... 
doi:10.1016/b978-012385251-9/50018-9 fatcat:smv3zphpnjfvrh5mslzjvgz4fa

Transparent control independence (TCI)

Ahmed S. Al-Zawawi, Vimal K. Reddy, Eric Rotenberg, Haitham H. Akkary
2007 Proceedings of the 34th annual international symposium on Computer architecture - ISCA '07  
Superscalar architectures have been proposed that exploit control independence, reducing the performance penalty of branch mispredictions by preserving the work of future misprediction-independent instructions  ...  The essential goal of exploiting control independence is to completely decouple future misprediction-independent instructions from deferred misprediction-dependent instructions.  ...  Predication fetches both CD paths of a correctly predicted branch, thereby wasting fetch and execution bandwidth on the alternate CD path, and also needlessly delays the execution of the CIDD First thesis  ... 
doi:10.1145/1250662.1250717 dblp:conf/isca/Al-ZawawiRRA07 fatcat:yhnymgwllvbkfnegvjv4vzc5fu

SEED

Francisco J. Mesa-Martínez, Michael C. Huang, Jose Renau
2006 Proceedings of the 15th international conference on Parallel architectures and compilation techniques - PACT '06  
Conventional designs rely on atomic wakeup-select cycles to ensure compact scheduling.  ...  Compared to a conventional issue queue design, which is assumed favorably to scale in size without any impact on cycle time, the performance degradation of our design is 3% for both INT and FP suites of  ...  When a basic block is committed, its ID is recycled. (BBIDs allocated to wrong-path blocks will be recycled when the first subsequent right-path block is committed.)  ... 
doi:10.1145/1152154.1152193 dblp:conf/IEEEpact/Mesa-MartinezHR06 fatcat:6j7xgjn7nzdwpdzynt7vu5ywne

Social Contracts and Informal Workers in the Global South [chapter]

2022 Extended Producer Responsibility: opportunities and challenges for waste pickers  
paid by informal workers in Accra, Ghana 4.2 Mean and median effective tax rates by income quintile 4.3 Reported preference for high vs low taxes 4.4 Reported reasons for tax non-compliance 9.1 Ability to  ...  and executing strategies (Schmalz et al. 2018) .  ...  and recycle waste and space to sort, store, bundle and process waste; with private waste collection companies to access waste; and with scrap dealers or industries which buy reclaimed waste.  ... 
doi:10.4337/9781839108068 fatcat:vzsmz6d5y5ccjfiyh2z5uxshfy

Recycling of Valuable Metals from Poly Cracker Ash of Printed Circuit Boards (PCBS) by Physical Beneficiation and Hydrometallurgical Treatment [chapter]

Vinod Kumar, Anjan Kumari, Manis Kumar Jha, A. Vidyadhar, B. K. Soni
2014 EPD Congress 2014  
I should like to express our deep appreciation of the hard work and devotion to duty of Dr. B. R. Nijhawan, Director of the Laboratory, and his colleagues.  ...  A novel two stage smelting process has been developed to recover manganese as ferro-silico-manganese. A pilot plant to process 350 kg/ day leached residue has been set up.  ...  In particular our joint research in the area of metal recycling from E-waste is poised to establishing the sustainable future society in both countries.  ... 
doi:10.1002/9781118889664.ch66 fatcat:trqkj7a2m5fbhlspu6bsbne5sm

Alumina Addition to Fluoride Slags for Recycling of Low Oxygen High Conductivity Copper Scrap through Electroslag Crucible Melting

V. V. Satya Prasad, A. Sambasiva Rao, U. Prakash, V. Ramakrishna Rao, P. Krishna Rao, Krishna M. Gupt
1998 ISIJ International  
I should like to express our deep appreciation of the hard work and devotion to duty of Dr. B. R. Nijhawan, Director of the Laboratory, and his colleagues.  ...  A novel two stage smelting process has been developed to recover manganese as ferro-silico-manganese. A pilot plant to process 350 kg/ day leached residue has been set up.  ...  In particular our joint research in the area of metal recycling from E-waste is poised to establishing the sustainable future society in both countries.  ... 
doi:10.2355/isijinternational.38.1387 fatcat:oxo7u4k7tjcvjgd4f4gjrxzpme

CAVA

Luis Ceze, Karin Strauss, James Tuck, Josep Torrellas, Jose Renau
2006 ACM Transactions on Architecture and Code Optimization (TACO)  
Specifically, the value prediction engine is located close to the L2 cache, off the critical path, and is trained only with L2 misses.  ...  Ceze et al. a confidence estimator to minimize wasted work on rollbacks because of mispeculations.  ...  Examples are loads that follow the wrong path of a branch, or loads that need to be replayed to satisfy the memory consistency model or other conditions.  ... 
doi:10.1145/1138035.1138038 fatcat:b7gutp6sjndbxfjk4v4mckejme

Squash Reuse via a Simplified Implementation of Register Integration

Amir Roth, Gurindar S. Sohi
2001 Journal of Instruction-Level Parallelism  
Integration also reduces the amount of wasteful speculation in the machine, cutting the number of instructions executed by up to 17% and the number of instructions fetched along mis-speculated paths by  ...  Integration reduces contention for execution resources, collapses dependent chains of operations and accelerates branch resolution.  ...  The authors thank the anonymous reviewers, whose comments helped improve this manuscript.  ... 
dblp:journals/jilp/RothS01 fatcat:nbqpyisxc5ehhiabk2tjey4j7q

Precise Runahead Execution

Ajeya Naithani, Josue Feliu, Almutaz Adileh, Lieven Eeckhout
2020 2020 IEEE International Symposium on High Performance Computer Architecture (HPCA)  
A recent improvement tracks the chain of instructions that leads to the long-latency load, stores it in a runahead buffer, and executes only this chain during runahead execution, with the purpose of generating  ...  Runahead execution improves processor performance by accurately prefetching long-latency memory accesses.  ...  If a branch instruction in the ROB turns out to be mispredicted, the processor discards all wrong-path instructions (including runahead instructions, if any), flushes the pipeline, and resumes normal execution  ... 
doi:10.1109/hpca47549.2020.00040 dblp:conf/hpca/NaithaniFAE20 fatcat:2x7rql4xi5dufdohvxn2eg3k4q

Food for Thought: Applying Behavioural Insights to Household Food Waste Recycling Behaviour

Linzi A. Shearer
2020
sustained influence on household food waste recycling behaviour.  ...  Local authorities, who are responsible for waste management, have historically relied on changes to physical infrastructure or informational interventions to drive performance improvements.  ...  Waste policy in the 1990s and 2000s largely focussed on improving dry recycling rates, with weight-based recycling targets leading to an almost exclusive focus on dry recycling over waste prevention and  ... 
doi:10.15126/thesis.00853724 fatcat:atje3yxzvrebjd63yrhv2d7h64
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