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Price Performance Metrics. CS3353. 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.
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Price Performance Metrics CS3353
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.
Memory Price Performance Ratio • Capacity • Speed
Memory Price Performance: Capacity • Compute the cost per GB, $/GB
Memory Price Performance: Speed • Cost/GB * maximum throughput.
Disk Price Performance Ratio • Disk performance is based on • Capacity • Reliability • Speed
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.
Disk Price Performance: Capacity • Total cost for array / bytes of available storage
Disk Price Performance: Reliability • Based on the • MTBF • Number of drives in the array • Total cost / (MTBF/n-drives)
Disk Price Performance: Speed • IO speed and the RAID implementation • Price/byte • speed in bytes/sec • The product of the two above is $/sec.