made easy test series

Question

please provide a detailed solution

Comments

Kindly type the problem , rather than posting it as a screenshot.

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Is it around 15? What am I supposed to take stall here? 29 and 59 😟

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bhai L1 ka hit time kya liya @gauravkc

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0. Usme koi stall nahi ana chahiye. Avg stall per inst pucha h, so. I might be wrong, not sure 😶

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Im getting around 20.

Taking L1 hit time 1 cycle.

If there is no miss = 3 cycles / instruction.

If there is miss :-

Cycles taken = 1+1/9[30+1/2[60]] = 7.666666667 = 23 cycles / instruction

Stalls = 23-3 = 20cycles. @gauravkc kaha galat hai bhai

 

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Maine try kiya k direct stalls nikle.

hitL1 * 0 + 1/10 (0.5 * 30 + 0.5 * 60)

0.5*30 hona chahiye ya 30?

out of the total miss (50% I'll face 30 cc + 50% I'll face 60 cc)

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30 bhai . agar 0.5 * 30 karra toh 0.5*(60+30) hona chaiye considering hierarchical access

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aur isse stalls thodi aa rahe , isse toh cycles aa rahe . 🤔

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Oh ha correct. 60+30 ayega fir.

Ha cycles aa rhe..  jane de chd 😂

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Type the problem, please.

Answer 1

Ans is 20.

((50/450)*(30)+(25/450)*60)*3

=20.

Answer 2

3 memory reference = 1ins

1 memory reference = 1/3 ins

450 memory reference = 450*1/3=150 ins

stall/ins=(miss l1/total no. of instruction) *hit L2+ (miss L2/total no. of instruction)* l2 miss

            = (50/150)*30+(25/150)*60     

            =10+10=20 Ans