Operating Systems Design and Implementation, Third Edition phần 2 pptx

... manager and the file system will be found in any operating system. The information server (IS) handles 2 2Simpo PDF Merge and Split Unregistered Version - http://www.simpopdf.com 12 12 Simpo ... might lead to the sequence A1, A2, A3, A1, A2, A3, A1, A2, A3, A1, before thekernel switches to process B. This situation is illustrated in Fig. 2- 28(a).Figure 2- 28. (a) Possible scheduling of ... reader. The question is how do you program the readers and thewriters? One solution is shown in Fig. 2- 21.Figure 2- 21. A solution to the readers and writers problem. (This item is displayed on page...

Operating Systems Design and Implementation, Third Edition phần 3 pptx

... more layers and the priority of a process may change during itsexecution. The clock and system tasks in layer 1 of Fig. 2- 29 receive the highest priority. The device driversof layer 2 get lower ... particularmoment. Fig. 2- 43 shows the queues and the processes that are in place at the instant the kernel completesinitialization and begins to run, that is, at the call to restart at line 725 2 in main.c. ... function in 825 9.c is put_irq_handler (line 81 62) . At initialization put_irq_handler is called foreach process that must respond to an interrupt. This puts the address of the handler routine...

Operating Systems Design and Implementation, Third Edition phần 1 doc

... 2 2Simpo PDF Merge and Split Unregistered Version - http://www.simpopdf.comCopyright[Page iv]Library of Congress Cataloging in Publication DataTanenbaum, Andrew S. Operating Systems: Design ... Systems: Design and Implementation / Andrew S. Tanenbaum, Albert S. Woodhull. 3rd ed. ISBN: 0-13-1 429 38-8 1. Operating systems (Computers) I. Woodhull, Albert S. II. TitleQA76.76.O63T36 20 06005.4'3 ... of a command such ascp file1 file2used to copy file1 to file2. After the shell has forked, the child process locates and executes the file cp and passes to it the names of the source and target...

Operating Systems Design and Implementation, Third Edition phần 4 docx

... using powers of 2a Kilobyte (KB) is 2 10= 1 024 bytes, a Megabyte (MB) is 2 20= 1 024 2 bytes, etc., to express the size of memory devices. A Gigabyte (GB), then, should be 1 024 3, or 2 30 bytes.However, ... with 32, 768 bytes of display memory can hold 20 4 completelines of 160 bytes each, and can do hardware scrolling 179 times before the inability to wrap becomes a 22 22 Simpo PDF Merge and Split ... 306]RS -23 2 TerminalsRS -23 2 terminals are devices containing a keyboard and a display that communicateusing a serial interface, one bit at a time (see Fig. 3 -27 ). These terminals use a 9-pin or 25 -pin...

Operating Systems Design and Implementation, Third Edition phần 5 potx

... REG ,24 576because virtual address 81 92 is in virtual page 2 and this page is mapped onto physicalpage frame 6 (physical addresses 24 576 to 28 671). As a third example, virtual address 20 500 is 20 ... chosen by the operating system. Even if the hardware has beendesigned with, for example, 5 12- byte pages, the operating system can easily regard pages 0 and 1, 2 and 3, 4 and 5, and so on, as ... address 20 500 is 20 bytes from the start of virtual page 5 (virtual addresses 20 480 to 24 575) and maps onto physical address 122 88 + 20 = 123 08.By itself, this ability to map the 16 virtual pages onto any...

Operating Systems Design and Implementation, Third Edition phần 6 ppsx

... D, and F in that order. Their respective load times were 18, 23 , 5, 7, 32, 19,3, and 8. Their reference bits are 1, 0, 1, 1, 0, 1, 1, and 0 and their modified bits are 1, 1, 1, 0, 0, 0,1, and ... time.CallFunctiontimeGet current real time and uptime in secondsstimeSet the real time clock 25 25 Simpo PDF Merge and Split Unregistered Version - http://www.simpopdf.com 2 2Simpo PDF Merge and Split Unregistered ... drivers and servers of MINIX 3 need support forcommunication with the kernel that is not necessary in monolithic operating systems. Fig. 4- 52 shows thesecalls and their purposes.[Page 4 72] Figure...

Operating Systems Design and Implementation, Third Edition phần 7 pps

... 27 217 and 27 218).4. Both parent directories must be on the same device (line 27 221 ).5. Both parent directories must be writable, searchable, and on a writable device (lines 27 224 and 27 225 ).6. ... (line 27 177). 2. The old pathname must not be a directory above the new pathname in the directory tree (lines 27 195 to 27 2 12) .3. Neither . nor is acceptable as an old or new name (lines 27 217 and ... (lines 24 819 and 24 820 ).Once this test has been passed, new_node is called. If new_node succeeds, then the directory entries for "." and " " are made (lines 24 841 and 24 8 42) ....

Operating Systems Design and Implementation, Third Edition phần 8 potx

... */ 025 17 #if __ACK__ ||__GNUC__ 025 18 #define _WORD_SIZE _EM_WSIZE 025 19 #define _PTR_SIZE _EM_WSIZE 025 20 #endif 025 21 025 22 #define _NR_PROCS 64 025 23 #define _NR_SYS_PROCS 32 025 24 025 25 /* ... addresses and lengths in bytes */ 028 18 #endif 028 19 028 20 #if (_MINIX_CHIP ==_CHIP_M68000) 028 21 typedef unsigned long vir_bytes;/* virtual addresses and lengths in bytes */ 028 22 #endif 028 23 028 24 ... M3_STRING 14 03011 030 12 typedefstruct {int m1i1, m1i2, m1i3; char *m1p1, *m1p2, *m1p3;} mess_1; 03013 typedef struct {int m2i1, m2i2, m2i3; longm2l1, m2l2; char *m2p1;} mess _2; 03014 typedef struct...

Operating Systems Design and Implementation, Third Edition phần 9 doc

... timers and run watchdog functions 20 211 *pm_cancel_timer: remove a time from the list of timers 20 2 12 * 20 213 */ 20 214 20 215 #include "pm.h" 20 216 20 217#include <timers.h> 20 218 ... <minix/syslib.h> 20 219 #include <minix/com.h> 20 220 20 221 PRIVATE timer_t*pm_timers = NULL; 20 222 20 223 /*===========================================================================* 20 224 *pm_set_timer ... 1 522 31 522 4 int irq_hook_id = -1; [Page 838]1 522 5 1 522 6 /* Standard and AT keyboard. (PS /2 MCA implies AT throughout.) */ 1 522 7 #define KEYBD 0x60 /*I/O port for keyboard data */ 1 522 8 1 522 9...

Operating Systems Design and Implementation, Third Edition phần 10 pdf

... 28 260 major =CTRLR(nr); 28 261 } 28 2 62 else { 28 263 panic(__FILE__,"monitor 'controller' syntax is 'c#' of 'fd'", NO_NUM); 28 264 } [Page 1 022 ] 28 265 28 266 ... #include<minix/com.h> 28 322 #include "file.h" 28 323 #include "fproc.h" 28 324 #include "inode.h" 28 325 #include "param.h" 28 326 28 327 #define ELEMENTS(a) ... 28 255 major = FLOPPY_MAJOR; 28 256 } 28 257 else if (controller[0] == 'c' && isdigit(controller[1])) { 28 258 if ((nr = (unsigned) atoi(&controller[1]))> NR_CTRLRS) 28 259...

Xem thêm