Recent questions tagged data-dependences

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1

Data dependancies
Anti- dependency will not ALWAYS create stall because we can use register renaming to remove stall. Please confirm below statement: Anti-dependency MAY create stall (True/False)

asked 1 day ago in CO & Architecture by Suneel Padala (57 points) | 8 views

+2 votes

1 answer

2

COA: Number of RAW hazards
Consider the following Instruction sequence I1: ADD R1,R2,R1 I2: LW R2,0(R1) I3: LW R1,4(R1) I4: OR R3,R1,R2 And assume following five stage pipeline with following stages: IF,ID,EXE,MEM,WB The no of RAW hazards in the above Instruction sequence is? (A) 3 (B) 2 (C) 4 (D) 1 Note:- I think there are 2 RAW hazards, b/w I1 & I2 and I3&I4.

asked Jan 20 in CO & Architecture by Vijay Thakur Boss (17k points) | 147 views

0 votes

0 answers

3

RAW, WAR, WAW hazards
J1: R1 = 100 J2: R1 = R2 + R4 J3: R2 = R4 + 25 J4: R4 = R1 + R3 J5: R1 = R1 + 30 Give the no of RAW, WAR and WAW hazards

asked Dec 3, 2017 in CO & Architecture by Tuhin Dutta Loyal (8.1k points) | 222 views

+2 votes

1 answer

4

WAR amd WAW dependency
R4 <- R1 + R4 R4 <- R2 + R4 R4 <- R3 + R5 Number of WAR and WAW dependencies?

asked Nov 4, 2017 in CO & Architecture by Rajesh R Active (1.6k points) | 84 views

0 votes

0 answers

5

Database #1NF
R(ABCDE) { A,BC,CD} are candidate key of relation R after 1 NF design which one is possible multi valued attributes before 1 NF design ???

asked Oct 27, 2017 in Databases by air1ankit Active (3.7k points) | 75 views

+3 votes

1 answer

6

Number of WAR
Number of WAR dependencies possible R1 <- R3 + R2 R3 <- R3 + R5 R3 <- R2 + R3 Is it 2 or 3?

asked Oct 26, 2017 in CO & Architecture by Rajesh R Active (1.6k points) | 76 views

0 votes

1 answer

7

Database
1- R(ABCD) FD'S ARE {AB->C ,C->D,D->EA ,DE->F,EF->B} 2-R(ABCD) FDS ARE { A->BC, CD->E, B->D,E-A} 3- R(ABCD) {AB-> CD,C->B,D->C} Find the candidate key ??? For above questions and please explain too.

asked Oct 17, 2017 in Databases by air1ankit Active (3.7k points) | 77 views

0 votes

0 answers

8

Calculate sum of (WAR, RAW and WAW) dependencies instructions.

asked Sep 28, 2017 in CO & Architecture by sunil sarode Active (1.3k points) | 214 views

+1 vote

0 answers

9

Random
If asked to count the number of RAW dependencies, do we consider only adjacent instructions or both adjacent and non-adjacent? Please explain in detail.

asked Sep 28, 2017 in CO & Architecture by Warlock lord Active (3.4k points) | 28 views

+1 vote

1 answer

10

database
For relation R=(L, M, N, O, P), the following dependencies hold: M→O, NO→P, P→Land L→MN R is decomposed into R1 = (L, M, N, P) and R2 = (M, O).What is the highest normal form satisfied by the above decomposition? My doubt is For R1 it is in 2NF and R2 it is in BCNF .But ,dependency preserving also violates .So whts the highest normal form ?

asked Jul 25, 2017 in Databases by set2018 Loyal (7.9k points) | 97 views

0 votes

1 answer

11

no of raw dependencies

asked Jan 19, 2017 in CO & Architecture by vaishali jhalani Loyal (5.8k points) | 107 views

0 votes

1 answer

12

ace database test series
Answer given is 4 tables: (Employee), (Monitors), (Project, Sponsors) and (Department). Is this answer right?

asked Nov 24, 2016 in Databases by Purple Active (3.5k points) | 80 views

+14 votes

3 answers

13

pipeline_hazard
no of RAW,WAR and WAW ?

asked Nov 23, 2016 in CO & Architecture by Debashish Deka Veteran (57.2k points) | 2.7k views

+1 vote

0 answers

14

Why there is no RAW conflict in follwing code ? Explain

asked Jan 20, 2016 in CO & Architecture by pC Boss (22.3k points) | 178 views

0 votes

1 answer

15

pipelining - without operand forwarding

asked Dec 24, 2015 in CO & Architecture by Himanshu1 Boss (15.4k points) | 481 views

+3 votes

7 answers

16

number of WAR dependencies

asked Dec 8, 2015 in CO & Architecture by Deepak Sharma 1 (157 points) | 1.4k views

+2 votes

1 answer

17

RAW dependencies
ADD R1 , R2, R2; ADD R3, R2, R1; SUB R4, R1 , R5; ADD R3, R3, R4; FIND THE NUMBER OF READ AFTER WRITE(RAW) DEPENDENCIES IN THE ABOVE CODE.

asked Sep 27, 2015 in CO & Architecture by Umang Raman Boss (15.9k points) | 412 views

+1 vote

1 answer

18

In Operand Forwarding technique how does the next instruction is able to access the dependent operand which is calculated in the previous instruction in the same Cpu Cycle?

asked Apr 3, 2015 in CO & Architecture by Anurag_s Loyal (8.1k points) | 689 views

+24 votes

2 answers

19

GATE2015-3-47
Consider the following code sequence having five instructions from $I_1 \text{ to } I_5$. Each of these instructions has the following format. OP Ri, Rj, Rk Where operation OP is performed on contents of registers Rj and Rk and the result is stored in register Ri. $I_1$ ... above statements is/are correct? Only S1 is true Only S2 is true Only S1 and S3 are true Only S2 and S3 are true

asked Feb 16, 2015 in CO & Architecture by jothee Veteran (101k points) | 2.9k views

+1 vote

1 answer

20

how many (RAW,WAR,WAW) dependencies exists in the following set of instruction R1<-R2+R3 R3<-R1-R2 R4<-R1+R3 R1<-R1*R3

asked Jan 26, 2015 in CO & Architecture by gate2015 (149 points) | 660 views

+14 votes

1 answer

21

GATE2007-IT-39
Data forwarding techniques can be used to speed up the operation in presence of data dependencies. Consider the following replacements of LHS with RHS. $R1→ Loc, Loc→ R2 \quad ≡ R1→ R2, R1 → Loc$ $R1→ Loc, Loc→ R2 \quad ≡ R1→ R2$ $R1→ Loc, R2 → Loc \quad ≡ ... RHS be the same as executing the LHS irrespective of the instructions that follow ? i and iii i and iv ii and iii ii and iv

asked Oct 30, 2014 in CO & Architecture by Ishrat Jahan Boss (19.1k points) | 1.4k views

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