Operating Systems Design and Implementation, Third Edition phần 8 potx

... 0 788 3 else penalty ; /* give slow wayback */ 0 788 4 prev_ptr = rp; /* store ptr for next */ 0 788 5 } 0 788 6 0 788 7 /* Determine the new priority of thisprocess. The bounds are determined 0 788 8 ... */ 0 482 6 #define _SRC_ 0 0 482 7 #define _DST_ 1 0 482 8 0 482 9/* Number of random sources */ 0 483 0 #define RANDOM_SOURCES 16 0 483 1 0 483 2 /* Constants and macros forbit map manipulation. */ 0 483 3 ... mem after 16M. More chunks are needed 0 486 6 * for DOSMINIX. 0 486 7 */ 0 486 8 #define NR_MEMS 8 0 486 9 0 487 0 #endif /* CONST_H */ 0 487 1 0 487 2 0 487 3 0 487 4 0 487 5++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++kernel/type.h++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++...

Operating Systems Design and Implementation, Third Edition phần 5 potx

... chosen by the operating system. Even if the hardware has beendesigned with, for example, 512-byte pages, the operating system can easily regard pages 0 and 1, 2 and 3, 4 and 5, and so on, as ... and deserves someexplanation. It was originally derived from three factors:1. The desire to keep the system easy to understand.2. The architecture of the original IBM PC CPU (an Intel 80 88) ,3. ... usertypes a command, the operating system copies the requested program from disk to memory and executes it.When the process finishes, the operating system displays a prompt character and waits for...

Operating Systems Design and Implementation, Third Edition phần 1 doc

... 0-13-1429 38- 8PrintISBN-13: 9 78- 0-13-1429 38- 3eTextISBN-10: 0-13- 185 991-9eTextISBN-13: 9 78- 0-13- 185 991-3Pages: 1 080 CopyrightPrefaceChapter1. IntroductionSection1.1. WhatIsan Operating System?Section1.2. ... Merge and Split Unregistered Version - http://www.simpopdf.com• Table ofContents&" ;87 %" class="v1"height="17">Index Operating Systems Design and Implementation, ... PDF Merge and Split Unregistered Version - http://www.simpopdf.comCopyright[Page iv]Library of Congress Cataloging in Publication DataTanenbaum, Andrew S. Operating Systems: Design and Implementation...

Operating Systems Design and Implementation, Third Edition phần 2 pptx

... quantum.[View full size image] 8 8Simpo PDF Merge and Split Unregistered Version - http://www.simpopdf.com[Page 88 (continued)]2.3. Classical IPC ProblemsThe operating systems literature is full ... interactive systems, especially timesharing systems and servers, different goals apply. The most importantone is to minimize response time, that is the time between issuing a command and getting ... used in batch systems. In the following ones we will examine interactive and real-time systems. It is worth pointing out that some algorithms are used in both batch and interactive systems. We...

Operating Systems Design and Implementation, Third Edition phần 3 pptx

... (lines 83 83 to 84 18) , is initialized by the compiler with the addresses ofthe routines that handle exceptions and hardware interrupts and then is used in the loop at lines 84 64 to 84 68 to initialize ... ofpossible sources and destinations, and the call may require either sending or receiving or both sending and receiving a message. A number of tests must be made. On lines 7 480 and 7 481 the function ... second function in 82 59.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 4 docx

... on and for newer systems with Pentium-class CPUs, but even among these there are differences.For instance, the oldest Pentium systems use the 16-bit AT bus originally designed for the 80 286 ... the BIOS.[Page 288 ] 8 8Simpo PDF Merge and Split Unregistered Version - http://www.simpopdf.comDisk Arm Scheduling AlgorithmsIf the disk driver accepts requests one at a time and carries them ... keyboard.c, and console.c, all of which are large files,When a user logs in on the system console, a shell is created for him with /dev/console as standard input,standard output, and standard error....

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 ... historicalnote, when the 80 -column punched card was king many (mainframe) operating systems based their file systems on files consisting of 80 -character records, in effect, card images. These systems also ... mainframe operating systems require themaximum size to be specified when the file is created, in order to let the operating system reserve themaximum amount of storage in advance. Modern operating systems...

Operating Systems Design and Implementation, Third Edition phần 7 pps

... (lines 2 481 9 and 2 482 0).Once this test has been passed, new_node is called. If new_node succeeds, then the directory entries for "." and " " are made (lines 2 484 1 and 2 484 2). ... whichunderstands about i-nodes and indirect blocks. For an ordinary file, the variables b and dev on line 25 280 and line 25 281 contain the physical block number and device number, respectively. ... read_write (line 25124) to handlecharacter special files, and from rw_block (line 22661) to handle block special files. It builds a standardmessage (see Fig. 3-17) and sends it to the specified...

Operating Systems Design and Implementation, Third Edition phần 9 doc

... kill theprocess. 1 988 0 */ 1 988 1 1 988 2 vir_bytes new_sp; 1 988 3 int s; 1 988 4 int slot; 1 988 5 int sigflags; 1 988 6 struct sigmsgsm; 1 988 7 1 988 8 slot = (int) (rmp - mproc); 1 988 9 if ((rmp->mp_flags ... getpgrp */1 788 0 1 788 1 no_sys, /* 64 = unused */ 1 788 2 no_sys, /* 65 = UNPAUSE */ 1 788 3 no_sys, /* 66 = unused */ 1 788 4no_sys, /* 67 = REVIVE */ 1 788 5 no_sys, /* 68 = TASK_REPLY */ 1 788 6 no_sys, ... name_buf)) != NULL); 188 02 188 03 if (m < 0) { 188 04 close(fd);/* something wrong with header */ 188 05 return(stk_bytes > ARG_MAX ? ENOMEM : ENOEXEC); 188 06 } 188 07 188 08 /* Can the process'...

Operating Systems Design and Implementation, Third Edition phần 10 pdf

... 283 85 case DEV_REVIVE: 283 86 revive(st.REP_PROC_NR, st.REP_STATUS); 283 87break; 283 88 case DEV_IO_READY: 283 89 select_notified(d, st.DEV_MINOR, st.DEV_SEL_OPS); 283 90 break; 283 91 default: 283 92 ... 283 70 283 71 for(d = 0;d < NR_DEVICES; d++) 283 72 if (dmap[d].dmap_driver == m->m_source) 283 73 break; 283 74 283 75 if (d >=NR_DEVICES) 283 76 return; 283 77 283 78 do { 283 79 int r; 283 80 ... 283 80 st.m_type = DEV_STATUS; 283 81 if((r=sendrec(m->m_source, &st)) != OK) 283 82 panic(__FILE__,"couldn't sendrec for DEV_STATUS", r); 283 83 283 84 switch(st.m_type) { 283 85...

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