PPT-Evaluation of Dynamic Branch Prediction Schemes in a MIPS P

Debajit B h attacharya Ali JavadiAbhari ELE 475 Final Project 9 th May 2012 Motivation Branch Prediction Simulation Setup amp Testing Methodology Dynamic Branch Prediction Single Bit Saturating Counter. Static Branch Prediction. Code around delayed branch. To reorder code around branches, need to predict branch statically when compile . Simplest scheme is to predict a branch as taken. Average misprediction = untaken branch frequency = 34% SPEC. (. iPhone. 3G). Jeff Brantley. Chris Gregg. Bill . Stitson. Processor Overview. Features. Designed for consumer and wireless products . RISC Processor with Harvard Architecture. Vector Floating Point coprocessor. CS 3220. Fall 2014. Hadi Esmaeilzadeh. hadi@cc.gatech.edu. . Georgia Institute of Technology. Some slides adopted from Prof. . Milos . Prvulovic. Control Hazards Revisited. Forwarding helps a lot with data hazards. Saehoon Kim. §. , . Yuxiong He. *. ,. . Seung-won Hwang. §. , . Sameh Elnikety. *. , . Seungjin Choi. §. §. *. Web Search Engine . Requirement. 2. Queries. High quality + Low latency. This talk focuses on how to achieve low latency without compromising the quality. and Portal bulk lodgements. Transition to preferred . channels. UNCLASSIFIED . – MIPS, ECI and Portal bulk lodgements. 1. MIPS, ECI and Portal . In the lead up to Tax Time 2014, we worked closely with stakeholders to encourage clients to lodge electronically through the Business Portal (BP) or Standard Business Reporting (SBR). . 5. Branch Prediction . (2.3) and . Scoreboarding. (A.7). 2. Why do we want to predict branches?. MIPS based pipeline – 1 instruction issued per cycle, branch hazard of 1 cycle.. Delayed branch. Modern processor and next generation – multiple instructions issued per cycle, more branch hazard cycles will incur.. Consider executing this sequence of instructions in the pipeline:. address instruction. ----------------------------. 36: sub $10, $4, $8. 40: . beq. $1, $3, 72. 44: and $12, $2, $5. Matthew S. Gerber, Ph.D.. Assistant Professor. Department of Systems and Information Engineering. University of Virginia. IACA Presentations on Social Media. The Modern Analyst. and Social Media (Woodward). As we saw last week, dynamic instruction issue allows us to exploit as much parallelism as exists in instruction code. Our stalling situations are limited to finite resources, cache misses and branches. cycle. Structural hazards. A required resource is busy. Data hazard. Need to wait for previous instruction to complete its data read/write. Control hazard. Deciding on control action depends on previous instruction. The materials of this lecture can be found in A7-A8 (3. rd. Edition) and B7-B8 (4. th. Edition). . The MIPS memory . Actually, everything above 0x7fffffff is used by the system.. What is in there?. EE194/Comp140 Mark Hempstead ECEC 194: High Performance Computer Architecture Spring 2016 Tufts University Instructor: Prof. Mark Hempstead mark@ece.tufts.edu Lecture 3: Review of Branch Prediction, Memory Hierarchy and Caches Topics: branch predictors, out-of-order intro, register renaming. 2. 2-Bit Bimodal Prediction. For each branch, maintain a 2-bit saturating counter:. if the branch is taken: counter = min(3,counter+1). Updates for Large Practices. March 17. th. 2022. 2:00 pm EST. Kayley Jaquet. Manager of Regulatory Affairs. Agenda. MIPs Program Recap: How did we get here?. 2022 Performance Year Updates. Thresholds and Category Weights.