PPT-Speculative execution

Landon Cox April 5 2017 Making disk accesses tolerable Basic idea Remove disk accesses from critical path Transform disk latencies into memory latencies Requires predicting the future Caching. 1 2 speculative execution. In order to fully exploit the potential of value speculation, however, a highly accurate value predictor and efficient architectural support for value speculative execution Purple Door Guide 2 The basics Speculative applications involve sending a CV and covering letter to an employer to enquire about possible vacancies in the sector you are interested in. They are a g Kevin Wallace, CSE504. 2010-04-28. 2. Problem. Attacker-facing code must be written to guard against all possible inputs. There are many execution paths; not a single one should lead to a vulnerability. Benjamin Wester. Peter Chen and Jason . Flinn. University of Michigan. Speculative Execution. Sequential dependent tasks. Predict results of Task A. to break dependence. Execute Task B in parallel. Isolate all effects. via. Merge Semantics in STMs. Kaushik. . Ravichandran. (kaushikr@gatech.edu). Santosh. . Pande. (santosh@cc.gatech.edu) . College of Computing. Georgia Institute of Technology. Introduction. Connected Components Problem and Speculative Parallelization. and . External Synchrony. Edmund . B.Nightingale. , . Kaushik. . Veeraraghavan. Peter Chen, Jason . Flinn. Presented by Han Wang. Slides based on the SOSP and OSDI presentations. C. onsistency. A. vailability. THE ONLY THING I CAN. TRUST. @. ANDY_PAVLO. Thirty Years Ago…. 2. S. mall # of . CPU. . C. ores. S. mall . M. emory. . S. izes. I. NTERACTIVE . T. ransactions. Check whether user has already voted.. of . Remote Data. Arun Raman. Princeton University. Greta . Yorsh. ARM, UK. Martin . Vechev. IBM . Research&ETH. Zurich. Eran. . Yahav. Technion. , Israel. Acknowledgments: . Nick Mitchell and Mark . In-order execution does not always give the best performance on . superscalar. machines.. The following example uses . in-order execution. and . in-order completion. .. Multiplication takes one more cycle to complete than addition/subtraction.. Loop Execution on . GPU and CPU. Mehrzad. . Samadi. 1. Amir Hormati. 2. Janghaeng. Lee. 1. and . Scott . Mahlke. 1. 1. 1. University . of Michigan - Ann . Arbor. 2. Microsoft Research, Microsoft. Amdahl’s Law. 9. th. Pacific Water . Conference and . Expo - Tonga. 9. th. – 12. th. august 2016. Without . execution strategy is aimless. ,. Without strategy execution is . useless. – Morris Chang CEO of TMSC. Big Data Systems. Khanh. Nguyen, Lu Fang, Harry . Xu. , Brian . Demsky. Donald Bren School of . Information and Computer Sciences. BIG DATA. …. 2. BIG DATA. Scalability . JVM crashes . due to . Hardware-Based Speculation. Prof. Chung-Ta King. Department of Computer Science. National Tsing Hua University, Taiwan. (Slides are from textbook, Prof. Hsien-. Hsin. Lee, Prof. . Yasun. Hsu) . About This Lecture. Model Applied to PGAS Computations. David . Ozog. *. , Allen . Malony. *. , Jeff Hammond. ‡. , . Pavan. . Balaji. † . * University . of . Oregon. ‡ . Intel . Corporation. † . Argonne . National .