Operating Systems Design and Implementation, Third Edition phần 3 pptx

... start of this file (lines 832 5 to 835 4) and provides space for storage of processor registers and other information that must be saved when a task switch is made. MINIX 3 uses only the fields that ... table. The array gate_table (lines 838 3 to 8418), is initialized by the compiler with the addresses of the routines that handle exceptions and hardware interrupts and then is used i...

Ngày tải lên: 12/08/2014, 22:21

... terms task and device driver is needed. In older versions of MINIX all 3 3 Simpo PDF Merge and Split Unregistered Version - http://www.simpopdf.com paper. [Page 93] 5 5 Simpo PDF Merge and Split ... debugging and status information about other drivers and servers, something that is more necessary in a system like MINIX 3, designed for experimentation, than would be the case for...

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... 0- 13- 142 938 -8 Print ISBN- 13 : 978-0- 13- 142 938 -3 eText ISBN-10 : 0- 13- 185991-9 eText ISBN- 13 : 978-0- 13- 185991 -3 Pages: 1080 Copyright Preface Chapter 1. Introduction Section 1.1. What Is an Operating System? Section 1.2. ... Andrew S. Tanenbaum, Albert S. Woodhull. 3rd ed. ISBN: 0- 13- 142 938 -8 1. Operating systems (Computers) I. Woodhull, Albert S. II. Title QA...

Ngày tải lên: 12/08/2014, 22:21

... sequences defined by the ANSI standard and recognized by MINIX 3 was shown in Fig. 3- 32. Parsing escape sequences is not trivial. Valid escape sequences in MINIX 3 can be as short as two characters, as ... choice of which request to handle next. Using FCFS, it would go next to cylinder 1, then to 36 , and so on. This algorithm would require arm motions of 10, 35 , 20, 18, 25, and...

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... it terminates. However, nowadays, few, if any, operating systems, support this model, even on mainframe batch systems. [Page 37 7] 4.1 .3. Relocation and Protection Multiprogramming introduces two ... code differed from the PSW key. Since only the operating system could change the protection codes and key, user processes were 3 3 Simpo PDF Merge and Split Unregistered Version...

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... 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 ... that the 3 3 Simpo PDF Merge and Split Unregistered Version - http://www.simpopdf.com 32 32 Simpo PDF Merge and Split Unregistered Version - http://www.simpopdf.com Creation t...

Ngày tải lên: 12/08/2014, 22:21

... change in MINIX 3, so the V2 i-node is used with the V -3 file system. The V2 i-node is twice as big as the old one, which was designed for compactness on systems with no hard drive and 36 0-KB diskettes. ... read_write (line 25124) to handle character special files, and from rw_block (line 22661) to handle block special files. It builds a standard message (see Fig. 3- 17) and sen...

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... m_m5; 030 29 mess_7 m_m7; 030 30 mess_8 m_m8; 030 31 } m_u; 030 32 } message; 030 33 030 34 /* The following defines provide names for useful members. */ 030 35 #define m1_i1 m_u.m_m1.m1i1 030 36 #define ... 030 05 *==========================================================================*/ 030 06 030 07 #define M1 1 030 08 #define M3 3 030 09 #define M4 4 030 10 #define M3_STRING 14 030...

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... 1 730 0 /* Function prototypes. */ 1 730 1 1 730 2 struct mproc; 1 730 3 struct stat; 1 730 4 struct mem_map; 1 730 5 struct memory; 1 730 6 1 730 7 #include <timers.h> 1 730 8 1 730 9 /* alloc.c */ 1 731 0 ... 1 833 2 *===========================================================================*/ 1 833 3 PRIVATE void patch_mem_chunks(mem_chunks, map_ptr) 1 833 4 struct memory *mem_chun...

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... 2 833 3 *===========================================================================*/ 2 833 4 PUBLIC int dev_open(dev, proc, flags) 2 833 5 dev_t dev; /* device to open */ 2 833 6 int proc; /* process to open for */ 2 833 7 int flags; /* mode bits and flags */ 2 833 8 { 2 833 9 int major, ... (sizeof(a)/sizeof((a)[0])) 2 832 8 2 832 9 extern int dmap_size; 2 833 0 2 833 1 /*===============...

Ngày tải lên: 12/08/2014, 22:21