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13 November, 23:18

We are trying to reduce the current time of 15s by 30% but this leads to an increase of 18% in the CPI. For each processor, what clock rate should we have to achieve this time reduction?

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  1. 14 November, 02:33
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    For reduction

    Execution time = (instructions * CPI) / (Clock rate)

    Since CPI is increased by 18%

    18/100 + 1 = 1.18

    Therefore

    P1 CPI = CPI x 1.18

    P2 CPI = CPIx 1.18

    P3 CPI = CPI x 1.18

    Since clockrate reduces by 30% we have it to be a 0.7

    P1: (Instructions x P1CPI) / 0.7

    P2: (Instructionsx P2CPI) / 0.7

    P3: (Instructions x P2CPI) / 0.7
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