'Data hazards' diaporamas de présentation

Topic 2

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Pipelining: Basic and Intermediate Concepts

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Instruction-Level Parallelism

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CS184b: Computer Architecture (Abstractions and Optimizations)

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Lecture 9

Lecture 9. Pipeline Hazards. Pipelined datapath and control. In the previous lecture, we finalized the pipelined datapath for instruction sequences which do not include hazards of any kind. Remember that we have two kinds of hazards to worry about:

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Instruction Level Parallelism and Dynamic Execution

Instruction Level Parallelism and Dynamic Execution. Recall from Pipelining Review. Pipeline CPI = Ideal pipeline CPI + Structural Stalls + Data Hazard Stalls + Control Stalls Ideal pipeline CPI : measure of the maximum performance attainable by the implementation

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???? ?????? ??????? 234267

???? ?????? ??????? 234267. ????? ??' 3 : Data Hazards ????? ?? ????? ?? ???? ???? Yohai Devir Franck Sala. ADD $1 $2 $3 (R1 ? R2 + R3) ADD $4 $1 $5 (R4 ? R1 + R5). ALU. Instruction Memory. Data Hazard. ID. EX. MEM. WB. Register File. Data Memory.

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Introduction to pipelining

Computer Organisatie 2009 - Andy D. Pimentel. Introduction to pipelining. A. B. C. D. Pipelining is Natural!. Pipelining provides a method for executing multiple instructions at the same time. Laundry Example

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EENG 449bG/CPSC 439bG Computer Systems Lecture 3 MIPS Instruction Set & Intro to Pipelining

EENG 449bG/CPSC 439bG Computer Systems Lecture 3 MIPS Instruction Set & Intro to Pipelining. January 20, 2004 Prof. Andreas Savvides Spring 2004 http://www.eng.yale.edu/courses/eeng449bG. The MIPS Architecture. Features: GPRs with load-store

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Lecture 6: Dynamic Scheduling with Scoreboarding and Tomasulo Algorithm (Section 2.4)

Lecture 6: Dynamic Scheduling with Scoreboarding and Tomasulo Algorithm (Section 2.4). Scoreboard Implications. Out-of-order completion => WAR, WAW hazards Solutions for WAR CDC 6600: Stall Write to allow Reads to take place; Read registers only during Read Operands stage.

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Review: Datapath with Data Hazard Control

0. ID/EX.RegisterRt. Review: Datapath with Data Hazard Control. PCSrc. ID/EX.MemRead. Hazard Unit. ID/EX. IF/ID.Write. EX/MEM. 0. PC.Write. IF/ID. 1. Control. Add. MEM/WB. Branch. Add. 4. Shift left 2. Read Addr 1. Instruction Memory. Data Memory. Register File. Read

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Design and Verification of an Image Processing CPU Using UVM

Design and Verification of an Image Processing CPU Using UVM. Co-author Milos Becvar EM Microelectronic-US. by Greg Tumbush Tumbush Enterprises. Introduction Design of CPU Verification of CPU Functional Coverage Results Summary. Agenda:. Introduction Design of CPU

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How Computers Work Lecture 13 Details of the Pipelined Beta

How Computers Work Lecture 13 Details of the Pipelined Beta. PC Q. XADDR. RA1 Memory RD1. JMP(R31,XADDR,XP). ISEL. 0. 1. 31:26. 25:21. 20:5. 9:5. 4:0. OPCODE. RA. C. RB. RC. +1. 0. 1. OPCODE. Register File. RA1 RD1. Register File. RA2 RD2. SEXT. ASEL. BSEL.

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Lecture 5: Pipelining Basics

Lecture 5: Pipelining Basics. Biggest contributors to performance: clock speed, parallelism Today: basic pipelining implementation (Sections A.1-A.3). The Assembly Line. Unpipelined. Start and finish a job before moving to the next. Jobs. Time. A. B. C.

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Pipeline Control Hazards and Instruction Variations

Pipeline Control Hazards and Instruction Variations. Hakim Weatherspoon CS 3410, Spring 2011 Computer Science Cornell University. See P&H Appendix 4.8 & 2.16 and 2.17. Announcements. PA1 available: mini-MIPS processor PA1 due next Friday Work in pairs Use your resources

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Pipelined b Processor

Pipelined b Processor. Recap: Unpipelined b. ILL OP. JT. Instruction Memory. XAdr. A. D. 4 3 2 1 0. PCSEL. ra<20:16>. rb<15:11>. rc<25:21>. 00. PC. WASEL. 0. 1. RA2SEL. XP. 1. +4. RA1. RA2. WD. WA. Register File. 0. WERF. WE. rc<25:21>. RD1.

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Chapter 4B: The Processor, Part B-2

Chapter 4B: The Processor, Part B-2. Read Section 4.7. Adapted from Slides by Prof. Mary Jane Irwin, Penn State University And Slides Supplied by the textbook publisher . DM. DM. Reg. Reg. Reg. Reg. IM. IM. ALU. ALU. Memory-to-Memory Copies Data Hazard.

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