A computer system consists of hardware, system programs, and application programs figs 1

... program and data User program and data Operating System Address 0xFFFFFFFF Limit Base 0 (a) User-2 data User -1 data User program Operating System Base-2 Limit-2 Limit-2 Limit -1 Base-2 Base -1 (b) Limit -1 Base -1 ... programs Hardware System programs Command interpreter Machine language Microarchitecture Physical devices Fig. 1- 1. A computer system consists...

Ngày tải lên: 28/04/2014, 16:35

... of a global vari- able. Thread 1& apos;s code Thread 2's code Thread 1& apos;s stack Thread 2's stack Thread 1& apos;s globals Thread 2's globals Fig. 2 -17 . Threads can have private ... cache(&buf, &page); } if (page not in cache(&page)) read page from disk(&buf, &page); return page(&page); } (a) (b) Fig. 2 -11 . A rough outline of the code...

Ngày tải lên: 28/04/2014, 16:35

... allocation matrix C 11 C 21 C n1 C 12 C 22 C n2 C 13 C 23 C n3 C 1m C 2m C nm Row n is current allocation to process n Resources available (A 1 , A 2 , A 3 , …, A m ) Request matrix R 11 R 21 R n1 R 12 R 22 R n2 R 13 R 23 R n3 R 1m R 2m R nm Row ... (c) Fig. 3 -11 . Three resource allocation states: (a) Safe. (b) Safe. (c) Unsafe. Process Tape drives Plotters A B C...

Ngày tải lên: 28/04/2014, 16:35

... algorithm. (a) 0 0 0 0 0 1 1 0 0 0 2 1 0 0 0 3 1 0 0 0 0 1 2 3 Page (b) 0 0 1 0 0 1 0 0 0 0 2 1 1 0 0 3 1 1 0 0 Page (c) 0 0 1 1 0 1 0 0 1 0 2 0 0 0 0 3 1 1 1 0 Page (d) 0 0 1 1 1 1 0 0 1 1 2 0 0 0 1 3 0 0 0 0 Page (e) 0 0 1 1 1 1 0 0 1 1 2 0 0 0 0 3 0 0 1 0 (f) 0 1 1 1 0 0 0 0 0 1 0 0 0 1 1 0 (g) 0 0 0 0 1 0 0 0 1 1 0 0 1 1 1 0 (h)...

Ngày tải lên: 28/04/2014, 16:35

... sector. 0 1 2 3 4 5 6 7 8 9 1 0 1 1 1 2 1 3 1 4 1 5 1 6 1 7 1 8 1 9 2 0 2 1 2 2 2 3 2 4 2 5 2 6 2 7 2 8 2 9 3 0 3 1 2 9 3 0 3 1 0 1 2 3 4 5 6 7 8 9 1 0 1 1 1 2 1 3 1 4 1 5 1 6 1 7 1 8 1 9 2 0 2 1 2 2 2 3 2 4 2 5 2 6 2 7 2 8 2 6 2 7 2 8 2 9 3 0 3 1 0 1 2 3 4 5 6 7 8 9 1 0 1 1 1 2 1 3 1 4 1 5 1 6 1 7 1 8 1 9 2 0 2 1 2...

Ngày tải lên: 28/04/2014, 16:35

... numbers 86 234 897 422 14 0 223 223 16 0 12 6 14 2 14 1 10 011 011 011 011 00 011 011 011 111 011 1 10 1 011 011 011 011 0 011 011 011 011 1 011 11 1 011 1 011 1 011 11 110 110 1 010 0 011 11 000 011 1 011 010 111 10 111 011 011 011 11 110 010 0 011 1 011 11 011 1 011 1 011 1 011 1 11 011 111 011 1 011 1 230 16 2 612 342 214 16 0 664 216 320 18 0 482 42 13 6 210 97...

Ngày tải lên: 28/04/2014, 16:35

... 7 -12 . An example of RMS and EDF real-time scheduling. A1 A1 B1 B1 A1 A2 B2 B 3A3 A4 A5 B4 A5 B1 B2 B2 Failed A2 B3 B4 0 10 20 30 40 50 60 70 80 90 10 0 11 0 12 0 13 0 14 0 Time (msec) A B C EDF RMS A2 A3 ... movie. A1 A1 A1 B1 B1 A2 A2 A2 A3 A3 B3 A4 A3 B3 A4 A5 B4 A5 B4 A4 A5 B1 B2 B2 B2 B3 B4 0 10 20 30 40 50 60 70 80 90 10 0 11 0 12 0 13 0...

Ngày tải lên: 28/04/2014, 16:35

... User- level software. Globally shared virtual memory consisting of 16 pages Memory Network (a) (b) (c) 012 345678 910 111 213 1 415 CPU 0 025 9 CPU 1 136 810 CPU 2 4 711 12 14 CPU 3 13 15 CPU 0 025 9 CPU 1 136 8 10 10 CPU ... call. The stubs are shaded gray. (a) Machine 1 Machine 2 Run-time system Operating system Shared memory Application Hardware Run-time sy...

Ngày tải lên: 28/04/2014, 16:35

... A cryptographically-protected capability. Goal Threat Data confidentiality Exposure of data Data integrity Tampering with data System availability Denial of service Fig. 9 -1. Security goals and ... (b) After the procedure A has been called. (c) Buffer overflow shown in gray. (a) First page (in memory) Second page (not in memory) Page boundary A A A A A A (b) B A A A A...

Ngày tải lên: 28/04/2014, 16:35

... z Fig. 10 -26. (a) Separate file systems. (b) After mounting. 0 (a) 1 2 3 8 9 10 111 213 1 415 0 1 2 3 10 111 213 1 415 0 1 1 213 1 415 (b) (c) Process A& apos;s shared lock A& apos;s shared lock B's shared ... parent Allocate child's stack and user area Fill child's user area from parent Allocate PID for child Set up child to share parent's text Copy page...

Ngày tải lên: 28/04/2014, 16:35