'Delay slot' diaporamas de présentation

Code Scheduling

Code Scheduling. Outline. Modern architectures Delay slots Introduction to instruction scheduling List scheduling Resource constraints Interaction with register allocation Scheduling across basic blocks Trace scheduling Scheduling for loops Loop unrolling Software pipelining.

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8 Processing of control transfer instructions

8 Processing of control transfer instructions. 8.1 Introduction 8.2 Basic approaches to branch handling 8.3 Delayed branching 8.4 Branch processing 8.5 Multiway branching 8.6 Guarded execution. TECH Computer Science. CH01. 8.1 Intro to Branch.

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659 views • 58 slides

September 13, 2000 Prof. John Kubiatowicz

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Octavo: An FPGA-Centric Processor Architecture

Octavo: An FPGA-Centric Processor Architecture. Charles Eric LaForest J. Gregory Steffan ECE, University of Toronto FPGA 2012, February 24. Easier FPGA Programming. We focus on overlay architectures Nios , MicroBlaze , Vector Processors These inherited their architectures from ASICs

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??? Instruction-Level Parallelism and Its Dynamic Exploitation

??? Instruction-Level Parallelism and Its Dynamic Exploitation. ??? chenwz@zju.edu.cn ????????? 2011 ? 09 ?. 3.3.5 Pipelining Control Hazards. Taxonomy of Hazards Structural hazards These are conflicts over hardware resources. Data hazards

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Lecturer PSOE, new dad Dan Garcia cs.berkeley/~ddgarcia

inst.eecs.berkeley.edu/~cs61c CS61C : Machine Structures Lecture #20 Introduction to Pipelined Execution, pt II 2005-11-09. There is one handout today at the front and back of the room!. CPS today!. Lecturer PSOE, new dad Dan Garcia www.cs.berkeley.edu/~ddgarcia.

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Pipelining Control Hazards and Deeper pipelines

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Lecture 5: Interrupts, Superscalar

Lecture 5: Interrupts, Superscalar. Professor Alvin R. Lebeck Computer Science 220 / ECE 252 Fall 2008. Admin. Homework #1 Due Today Homework #2 Assigned Reading H&P Chapter 2 & 3 (suggested) Research papers (not yet ready to read, but will be soon!):

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COMP 4211 Seminar Presentation

COMP 4211 Seminar Presentation. Based On: Computer Architecture A Quantitative Approach by Hennessey and Patterson Presenter : Feri Danes. Outline. Exceptions Handling Floating Points Operations Case Study: MIPS R4000 Pipeline Case Study: MIPS R4300 Pipeline. What is Exception?.

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Pipeline Control Hazards and Instruction Variations

Pipeline Control Hazards and Instruction Variations. Hakim Weatherspoon CS 3410, Spring 2012 Computer Science Cornell University. See P&H Appendix 4.8. Goals for Today. Recap: Data Hazards Control Hazards What is the next instruction to execute if a branch is taken? Not taken?

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Lecture 3: Control flow, interrupts and exceptions

Lecture 3: Control flow, interrupts and exceptions. Prof. John Kubiatowicz Computer Science 252 Fall 1998. Changes in the flow of instructions make pipelining difficult. Must avoid adding too much overhead in pipeline startup and drain.

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EECE 476: Computer Architecture Slide Set #6: Multicycle Operations

EECE 476: Computer Architecture Slide Set #6: Multicycle Operations. Tor Aamodt. Learning Objectives. By the end of this slide set, be able to: Describe three types of data dependencies and hazards and explain the difference between a data dependency and a data hazard

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SE-292 High Performance Computing Pipelining

SE-292 High Performance Computing Pipelining. IF. IF. IF. IF. ID. ID. ID. ID. EX. EX. EX. EX. MEM. MEM. MEM. MEM. WB. WB. WB. WB. Pipelining. time. i1. i2. i3. i4. Execution time of instruction is still 5 cycles, but throughput is now 1 instruction per cycle

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SE-292 High Performance Computing Pipelining

SE-292 High Performance Computing Pipelining. IF. IF. IF. IF. ID. ID. ID. ID. EX. EX. EX. EX. MEM. MEM. MEM. MEM. WB. WB. WB. WB. Pipelining. time. i1. i2. i3. i4. Execution time of instruction is still 5 cycles, but throughput is now 1 instruction per cycle

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(Recap) Control Hazards

(Recap) Control Hazards. Control (Branch) Hazard. A : beqz r2, label B : --------- label: P : Problem : The outcome of the branch (taken/not taken) is determined deep in the pipeline Do not know whether to execute B or execute P? Solutions :

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Lecture: Pipelining Extensions

Lecture: Pipelining Extensions. Topics: control hazards, multi-cycle instructions, pipelining equations. Summary. For the 5-stage pipeline, bypassing can eliminate delays between the following example pairs of instructions: add/sub R1, R2, R3

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Lecture 12: Pipelining

Lecture 12: Pipelining. Computer Engineering 585 Fall 2001. 11%. compress. 3%. 3%. 22%. eqntott. 2%. 2%. 11%. espresso. 4%. 1%. 12%. gcc. 3%. 4%. 11%. li. 4%. 8%. Benchmark. 6%. doduc. 2%. 2%. 6%. ear. 4%. 4%. 10%. hydro2d. 2%. 0%. 9%. mdljdp. 0%. 0%. 2%.

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Branch & Pipelines

ammar:. Branch & Pipelines. Branch & Pipelines. write. ifetch. read. compute. Bnch. write. ifetch. read. compute. Delay Slot. write. ifetch. read. compute. Branch Target. By the end of the read stage of the Branch instruction, the CPU knows

126 views • 5 slides

Branch & Pipelines

ammar:. Branch & Pipelines. Branch & Pipelines. write. ifetch. read. compute. Bnch. write. ifetch. read. compute. Delay Slot. write. ifetch. read. compute. Branch Target. By the end of the read stage of the Branch instruction, the CPU knows

150 views • 5 slides