1 / 3

Understanding Hazards in Instruction Sequences for Efficient Processing

Learn about hazards in instruction sequences, how to detect and resolve them, and the concept of structure hazard with illustrative examples.

zorina
Download Presentation

Understanding Hazards in Instruction Sequences for Efficient Processing

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. CO97 Test-6

  2. The Problem • Given the following sequence of instructions, sub $2, $1, $3and $12, $2, $5or $13, $6, $2add $14, $2, $2beq $13, $13, L1lw $3, 100($2)sub $2, $2, $3 (1) show the incurred hazards, (20%) (2) show how to detect these hazards, and (28%) (3) show how to resolve these hazards. (32%) (4) What is structure hazard? Give an example for illustration. (20%)

  3. The Solution of Test-6 • Given the following sequence of instructions, 1. sub $2, $1, $32. and $12, $2, $5 /* DH-1(1,2), See pp. 407, stall or forwarding from EX/MEM*/ 3. or $13, $6, $2 /* DH-2(1,3), See pp. 410, stall or forwarding from the MUX after MEM/WB*/ 4. add $14, $2, $25. beq $13, $13, L1 /* DH-4(3,5), BH(5), beq, moving branch decision to ID stage + (one stall or branch prediction) */6. lw $3, 100($2) 7. sub $2, $2, $3 /* DH-3(6,7), See pp. 413, stall one cycle */ (1) show the incurred hazards, (20%) each 5%(2) show how to detect these hazards, and (28%) each 7% (3) show how to resolve these hazards. (32%) each 8%(4) What is structure hazard? Give an example for illustration. (20%) /* Refer to pp. 375 */

More Related