The results of the SPEC CPU 2006 bzip2 benchmark running on an AMD Barcelona has an instruction count of 2.389E12, an execution time of 750 s, and a reference time of 9650 s.

1. Find the CPI if the clock cycle time is 0.333 ns.

2. Find the SPEC ratio.

3. Find the increase in CPU time if the number of instructions of the benchmark is increased by 10% without affecting the CPI.

4. Find the increase in CPU time if the number of instructions of the benchmark is increased by 10% and the CPI is increased by 5%.

5. Find the change in the SPECratio for this change.

6. Suppose that we are developing a new version of the AMD Barcelona processor with a 4 GHz clock rate. We have added some additional instructions to the instruction set in such a way that the number of instructions has been reduced by 15%. Th e execution time is reduced to 700 s and the new SPEC ratio is 13.7. Find the new CPI.

7. Th is CPI value is larger than obtained in 1.11.1 as the clock rate was increased from 3 GHz to 4 GHz. Determine whether the increase in the CPI is similar to that of the clock rate. If they are dissimilar, why?

8. By how much has the CPU time been reduced?

9. For a second benchmark, libquantum, assume an execution time of 960 ns, CPI of 1.61, and clock rate of 3 GHz. If the execution time is reduced by an additional 10% without affecting to the CPI and with a clock rate of 4 GHz, determine the number of instructions.

10. Determine the clock rate required to give a further 10% reduction in CPU time while maintaining the number of instructions and with the CPI unchanged.

11. Determine the clock rate if the CPI is reduced by 15% and the CPU time by 20% while the number of instructions is unchanged.