Computer Architecture Homework: Comparing Machine Performance, Assignments of Computer Science

Download Computer Architecture Homework: Comparing Machine Performance and more Assignments Computer Science in PDF only on Docsity! 1 of 2 CS 1541 Computer Architecture - Spring 2003 Homework #1 Assigned: Wednesday, January 15. Due: Wednesday, January 22. Due by 5 PM in Shukang Zhou’s mailbox on the 6th floor of Sennott Square Assignment (1) We wish to compare the performance of two different machines: M1 and M2. The following measure- ments have been made on these machines: If the clock rates of machine M1 is 2.1 GHz and the clock rate of machine M2 is 3.0 GHz, what is the clock cycles per instruction (CPI) for each program on each machine? (2) Consider two different implementations, M1 and M2, of the same instruction set. There are four classes of instructions (ALU, branch, load/store, and others) in the instruction set. M1 has a clock rate of 500 MHz. The average number of cycles for each instruction class on M1 is as fol- lows: M2 has a clock rate of 750 MHz. The average number of cycles for each instruction class on M2 is as fol- lows: Program Time on M1 Time on M2 1 8 seconds 5 seconds 2 3 seconds 4 seconds 3 12 seconds 14 seconds Program Number of instructions executed on M1 Number of instructions executed on M2 1 2.50 × 109 1.80 × 109 2 1.00 × 109 1.50 × 109 3 3.20 × 109 4.00 × 109 Class CPI for this class ALU 1.0 Branch 1.5 Load/Store 4.0 Others 2.0 Class CPI for this class ALU 2.0 Branch 2.5 Load/Store 6.0 Others 3.5