Homework09-sol - Homework #09 (Solution) 3/28/2003 3:24 AM...

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ECSE-2660 Computer Architecture, Networks, & Operating Systems, Spring 2003 Page 1 of 3 Homework #09 (Solution) 3/28/2003 3:24 AM Working Set 1. (30 points) The following lists represent the page references for two processes, P1, and P2. For each time interval, calculate the size of the working set (WS) of each process for window sizes (W ≡∆ ) of 3 and 6. Assume that there is no frame in memory for the processes P1 and P2 before time 1. Time P1-page references P2-page references Size of P1 WS (W=3) Size of P1 WS (W=6) Size of P2 WS (W=3) Size of P2 WS (W=6) 1 2 5 1 1 1 1 2 2 1 1 1 2 2 3 6 5 2 2 2 2 4 8 3 3 3 3 3 5 4 9 3 4 3 4 6 8 1 2 4 3 4 7 6 3 3 4 3 4 8 2 5 3 4 3 4 9 2 11 2 4 3 5 10 6 5 2 4 2 5 11 8 7 3 3 3 5 12 2 9 3 3 3 5 13 4 5 3 4 3 4 14 10 3 3 5 3 5 15 4 5 2 5 2 4 16 8 3 3 4 2 4 17 10 7 3 4 3 4 18 2 9 3 4 3 4 19 4 1 3 4 3 5 20 10 3 3 4 3 5 21 6 9 3 5 3 4 Grading: 1 pt off for each wrong cell, up to 6 per column. Bus characteristics 2. (30 points) S&G Problem 14.17 (2002 and 2003 editions) or 13.17 (1999 edition), parts (a) through (d). (a) (7 points) 7200 rpm = 120 rps.= 120 tracks/sec Max transfer rate = 120 tracks/second x 160 sectors/track x 512 bytes/sector = 9,830,400 bytes/sec (=9.375 MB/sec) Grading: 7pts for correct, 3pts for right method, 1pt for trying. Answer for part (b) here, instead of approximate
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Homework09-sol - Homework #09 (Solution) 3/28/2003 3:24 AM...

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