Pipelining

Question

A program executed 14 million instructions on a 5-stage X pipeline which execute one instruction on one cycle. Of these, 3 million are memory instructions. The I-cache hit rate is 95% and the D-cache hit rate is 70%. The average extra latency when going to lower levels of memory is 6 cycles. Ignoring all stalls except cache misses, what is t he run-time of the program?

• A. 9.6 million cycles
• B. 19.4 million cycles
• C. 18.2 million cycles
• D. 23.6 million cycles

Comments

Tavg=14+3*(0.95*1+0.05*(0.70*6+0.30*(6+6))=18.2 million cycle

I am getting C pls check

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is the answer right ?

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Bro I don't have the answer...I have approached like above..is something missing in the question...pls post ur solution...