'8 r1' diaporamas de présentation

Topic 3

Topic 3. Exploitation of Instruction Level Parallelism. The secret to creativity is knowing how to hide your sources. Albert Einstein. Reading List. Slides: Topic3x Henn&Patt: Chapters 3 & 4 Other assigned readings from homework and classes. Instruction Level Parallelism .

1.24k views • 109 slides

John Kubiatowicz Electrical Engineering and Computer Sciences University of California, Berkeley

CS252 Graduate Computer Architecture Lecture 6 Introduction to Advanced Pipelining: Out-Of-Order Execution. John Kubiatowicz Electrical Engineering and Computer Sciences University of California, Berkeley http://www.eecs.berkeley.edu/~kubitron/cs252 http://www-inst.eecs.berkeley.edu/~cs252.

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Lecture 7: Instruction Level Parallelism 2: Getting the CPI < 1

Lecture 7: Instruction Level Parallelism 2: Getting the CPI < 1. Prof. John Kubiatowicz Computer Science 252 Fall 1998. Review: Hardware unrolling, in-order commit, and explicit register renaming.

1.14k views • 77 slides

September 17 th , 2003 Prof. John Kubiatowicz

CS252 Graduate Computer Architecture Lecture 6 Introduction to Advanced Pipelining: Out-Of-Order Pipelining. September 17 th , 2003 Prof. John Kubiatowicz http://www.cs.berkeley.edu/~kubitron/courses/cs252-F03. Earliest forwarding for 4-cycle instructions. Fetch. Decode. Ex1. Ex2. Ex3.

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Loop Example Cycle 7

Loop Example Cycle 7. Note: MULT2 has no registers names in RS. Superscalar Processors. What support do we need to fetch & issue multiple instructions/cycle? (that we have already seen) 1. 2. Review: Unrolled Loop that Minimizes Stalls for Scalar. 1 Loop: LD F0,0(R1) 2 LD F6,-8(R1)

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Evolution of Microprocessor Performance

Evolution of Microprocessor Performance.

450 views • 40 slides

Advanced Computer Architecture 5MD00 Exploiting ILP with SW approaches

Advanced Computer Architecture 5MD00 Exploiting ILP with SW approaches. Henk Corporaal www.ics.ele.tue.nl/~heco TUEindhoven December 2012. Topics. Static branch prediction and speculation Basic compiler techniques Multiple issue architectures Advanced compiler support techniques

576 views • 39 slides

September 15, 2003 Prof. John Kubiatowicz cs.berkeley/~kubitron/courses/cs252-F03

CS252 Graduate Computer Architecture Lecture 5 Software Scheduling around Hazards Out-of-order Scheduling. September 15, 2003 Prof. John Kubiatowicz http://www.cs.berkeley.edu/~kubitron/courses/cs252-F03. PC saved Disable All Ints Supervisor Mode. Restore PC User Mode.

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Review

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ILP In Software

ILP In Software. Outline. Compiler scheduling Static branch prediction Loop unrolling Dependence detection Software Pipelining VLIW Trace scheduling Super block scheduling Hardware support for speculative execution Predicated instructions Poison bits.

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Floating Point/Multicycle Pipelining in DLX

Floating Point/Multicycle Pipelining in DLX. Completion of DLX EX stage floating point arithmetic operations in one or two cycles is impractical since it requires: A much longer CPU clock cycle, and/or An enormous amount of logic.

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Graduate Computer Architecture I

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Lecture 6 MIPS R4000 and Instruction Level Parallelism

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Multiple Instruction Issue: CPI < 1

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CS152 Computer Architecture and Engineering Lecture 15 Advanced pipelining/Compiler Scheduling

CS152 Computer Architecture and Engineering Lecture 15 Advanced pipelining/Compiler Scheduling. Review: Pipelining. Key to pipelining: smooth flow Making all instructions the same length can increase performance! Hazards limit performance Structural: need more HW resources

366 views • 23 slides

Computer Architecture

Computer Architecture. Lecture 7 Compiler Considerations and Optimizations. Structure of Recent Compilers. Front End. Transform Language to Common Intermediate Form

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Lecture 21: Advanced pipelining techniques

Lecture 21: Advanced pipelining techniques. Michael B. Greenwald Computer Architecture CIS 501 Fall 1999. Scheduling. Scheduling does not remove dependencies , it just reduces hazards/stalls. static scheduling : separate dependent instructions to minimize hazards/stalls

309 views • 21 slides

Pipelining 5

Pipelining 5. Two Approaches for Multiple Issue. Superscalar Issue a variable number of instructions per clock Instructions are scheduled either statically or dynamically VLIW (Very Long Instruction Word)

313 views • 19 slides

ILP: Software Approaches

ILP: Software Approaches. Bazat pe slide-urile lui Vincent H. Berk. HW Support for More ILP. Avoid branch prediction by turning branches into conditionally executed instructions: If (X) then A = B op C else NOP If false, then neither store result nor cause exception

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ILP (Recap)

ILP (Recap). Instruction Level Parallelism. Basic Block (BB) ILP is quite small BB: a straight-line code sequence with no branches in except to the entry and no branches out except at the exit

196 views • 10 slides