1. Price Performance Metrics CS3353

2. CPU Price Performance Ratio Given – Average of 6 clock cycles per instruction – Clock rating for the cpu – Number of cores per cpu-die. Calculate the total MIPS rating for the chip Divide the MIPS rating by the cost to get the price performance ratio.

3. Memory Price Performance Ratio Capacity Speed

4. Memory Price Performance: Capacity Compute the cost per GB, $/GB

5. Memory Price Performance: Speed Cost/GB * maximum throughput.

6. Disk Price Performance Ratio Disk performance is based on – Capacity – Reliability – Speed

7. Disk Price Performance: Capacity Cents/GB Note that RAID will impact the price performance measure based on capacity. – Determine the RAID storage efficiency – Do not include the Parity storage for this measurement – If the drives are different sizes, then the HDD with the smallest capacity determines the capacity of all the drives in the array. – Include the cost of any additional required hardware like a RAID controller.

8. Disk Price Performance: Capacity Total cost for array / bytes of available storage

9. Disk Price Performance: Reliability Based on the – MTBF – Number of drives in the array – Total cost / (MTBF/n-drives)

10. Disk Price Performance: Speed IO speed and the RAID implementation – Price/byte – speed in bytes/sec – The product of the two above is $/sec.