WO1999057632A2 - Initializing and restarting operating systems - Google Patents
Initializing and restarting operating systems Download PDFInfo
- Publication number
- WO1999057632A2 WO1999057632A2 PCT/US1999/008032 US9908032W WO9957632A2 WO 1999057632 A2 WO1999057632 A2 WO 1999057632A2 US 9908032 W US9908032 W US 9908032W WO 9957632 A2 WO9957632 A2 WO 9957632A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- image
- operating system
- configurations
- device driver
- configuration
- Prior art date
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Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F8/00—Arrangements for software engineering
- G06F8/40—Transformation of program code
- G06F8/54—Link editing before load time
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
- G06F11/14—Error detection or correction of the data by redundancy in operation
- G06F11/1402—Saving, restoring, recovering or retrying
- G06F11/1415—Saving, restoring, recovering or retrying at system level
- G06F11/1438—Restarting or rejuvenating
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F9/00—Arrangements for program control, e.g. control units
- G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
- G06F9/44—Arrangements for executing specific programs
- G06F9/4401—Bootstrapping
- G06F9/4406—Loading of operating system
Definitions
- BIOS basic input/output system
- the BIOS controls many important functions of the personal computer, such as how it interprets key strokes, how it puts characters on the screen, and how it communicates with other devices.
- the BIOS typically instructs the computer to test itself every time the user turns the computer on. To do this, the BIOS uses a power on self test or "POST".
- POST power on self test
- a user might simultaneously, in a pictare-within-picture system, play a game running on the Windows® operating system and simultaneously watch television. If the game were to crash, an error message could appear on the screen which would interfere with normal television viewing and at least for a short period, the television picture would be affected by the computer crash.
- RTOS Real Time Operating System
- a method for preventing a system failure includes developing an image for an operating system adapted to a specific configuration. The image is then stored. Upon detection of a program failure, the ⁇ mage is loaded into system memory.
- Fig. 1 is a diagrammatic depiction of one embodiment of the present invention
- Fig. 2 is a flow diagram for a fast initiation program
- Fig. 3 is a block diagram showing the computer system which could implement the embodiment of the present invention shown in Fig. 1 ;
- Fig. 4 is a more detailed diagrammatic depiction of the base operating system image shown in Fig. 1 ;
- a hard disk drive 10 may store a number of files for an operating system such as the Windows® operating system. Typical files 12 would be user files, registry files and other operating system files.
- a special disk partition 14 provides an area for a new base image 16 and a base operating system image 18.
- the base operating system image 18 may be a stored virtual image which may have been preloaded at an originating computer manufacturing facility.
- the image captures a system configuration for a base computer system with a predefined, set of hardware and software configuration parameters. These parameters may be applicable to a particular computer as it is originally configured or it may be a hypothetical set of configurations which may or may not correspond precisely to the configuration of the computer.
- the base operating system image 18 may, for example, include initial register settings, device settings, base memory page files and the like. In short, it includes everything that is loaded into memory at run time including dedicated applications and a user shell. Basically, the image includes all the necessary parameters for an operating system, such as the Windows® operating system, to operate an actual or hypothetical computer configuration.
- the image 18 includes information about the memory and registers of an actual or hypothetical base machine after bootup time.
- An example of the operation of one illustrative embodiment could involve a set top personal computer operating a television tuner and a video game in a screen within a screen display. If it becomes necessary to restart the system, it would be desirable for the transition to occur seamlessly. Namely, it would be desirable that the system restart without the user noticing a significant change in either the video game or the television picture.
- the special disk partition 14 also includes a new base image 16.
- An exemplary flow for a fast initiation program begins by providing an open operating system, as indicated at block 120. Thereafter, a base image is developed as described herein and the base image is stored, as shown in blocks 122 and 124. After the system has booted (block 126), the image is loaded into memory (block 128). Control is then transferred to the operating system, as indicated at block 130.
- the base image 18 includes a virtual device driver (VxD) 102, application program interface (API) 100 and a VxD and executive 102.
- VxD virtual device driver
- API application program interface
- the VxD API 100 may, for example, be the device I/O control API provided with the Windows® 32 bit operating systems.
- the API 100 initiates the VxD 102, causing the VxD 102 to create the base image 18 or the new image 16.
- the dedicated applications 106 are critical program applications which advantageously run in a seamless fashion even after a crash.
- the application programs responsible for digital television function desirably run in a seamless fashion so that if there is a crash, for example, on a Windows® application such as a game, the user would not notice the crash on his or her digital television picture.
- These dedicated applications 106 may be loaded with the image 16 or 18, the API 100 and the VxD and executive 102.
- the registry 112 is a status database, such as the Windows® registry.
- the registry 112 is not part of the image 16 or 18 but it provides the latest information on hardware and software configurations. It is used by the image 18 to bring the system back (after a crash) with all the settings that existed just before the crash. In other words, when the system is restored, the latest settings can be recalled using information obtained by the dedicated applications 106 from the registry 112. For example, in a set top personal computer application, the television channel that was being viewed when the crash occurred can be obtained from the registry 112.
- the shared memory 110 allows the base image 18 to communicate with the system management mode (SMM) memory 108. As indicated in Fig. 4, the SMM runs in protected system management memory space. This space exists at ring 0 and is very protected.
- SMM system management mode
- the image 16 or 18 is created by the executive 102.
- the VxD and executive 102 are called at a point where the dedicated applications and the user shell are loaded and ready to query the VxD API 100 for a wakeup signal.
- the image may include the complete memory state of the machine including hardware registers of the processor and devices, together with some system files.
- the image may be created at the computer manufacturing plant but new images can be created by making the same VxD call, for example, when the system configuration is changed. For example, if a new dedicated application were added, it would be desirable to store a new image.
- One way to implement this function is to set a flag whenever the system reboots. The check at block 62 can then determine whether the flag indicates a reboot has occurred suggesting a new base image should be developed. If the flag is not set, the flow jumps down and the executive 102 is run (block 68). If changes have been made, a new base image is created at 64 and stored at 66. The stored image is then transferred to system memory 22 (block 67) and the executive is run (block 68).
- the real time executive 102 runs at ring O underneath other more visible operations. It is used to allow extension of the operating system kernel which, since it is preprogrammed, may not be amenable (after the fact) to the functionality described herein. However, the executive functionality could be incorporated into the kernel in developing a new operating system. The executive then implements the operating system functionality using the special disk partition 14. The provision of the virtual image is useful not only at initiation but also in the variety of circumstances which may require restarting of the operating system. The most important is a program error or crash. A crash is a program error caused by hardware or software problems. A program may crash in response to an exception, an infinite loop, a race condition, a resource shortage or a memory violation.
- An exemplary software program for implementing the above described program includes the step of developing an image of a base system configuration (block 140).
- a virtual device driver is developed, as indicated in block 142, and the image developed in block 140 and the virtual device driver developed in block 142 are stored, as indicated in block 144. If quick activation is desired, the image and the virtual device driver are loaded, as indicated in blocks 146 and 148.
- the kernel determines, at diamond 70, whether or not there is a crash. If the kernel is operating and determines that there has been a crash, the kernel can take corrective action, as indicated at block 72. If the kernel is not operating or has not detected the crash, a check is made at diamond 74 to determine whether the system management mode has detected the crash.
- the system management mode monitors for a number of different crash circumstances and routinely detects a variety of different failures.
- Other detectors of system failure can be used as well including those variously described as heart beat monitors, watch dog timers, and crash detectors. In each case the systems detect some symptom of failure such as a hang, a lack of bus operations or some other system associated with a crash.
- a crash is detected at diamond 74, either by the system management mode or some other way, a check is made at diamond 76 to determine whether or not it would be possible to overcome the problem merely by closing the application. If so, the application is merely closed at block 72.
- the system management mode or other crash detector may have a cache which provides information about different failures which may occur.
- the cache which may be stored on the hard disk drive 10, provides information about the best way to deal with those failures. If the failure is one in which the problem can be overcome merely by closing the application, it would normally be desirable to undertake that approach. If the recorded cache information suggests it is not possible merely to close the application, a check is made at diamond 78 to determine whether or not the executive should be run.
- the cache is checked to determine whether or not the use of the virtual image will overcome the problem. If not, the flow moves to a reset 80 and the system is reset in the conventional fashion. If the cache information indicates that the virtual image could be used to overcome the problem, the VxD is initiated, as indicated at block 82. Thereafter, the virtual image is called at block 84 and the executive takes over control at 86. The executive brings the system up using the predefined virtual image, as originally loaded into the system, or as modified as described previously, to accommodate changed system configurations. Thus, the virtual image of a base or new base image may not only expedite the initiation of the operating system but may also provide a useful tool for crash handling.
Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB0022497A GB2353381B (en) | 1998-04-30 | 1999-04-13 | Initializing and restarting operating systems |
EP99916655A EP1137987B1 (en) | 1998-04-30 | 1999-04-13 | Initializing and restarting operating systems |
JP2000547539A JP3598272B2 (en) | 1998-04-30 | 1999-04-13 | Starting and restarting the operating system |
AT99916655T ATE286606T1 (en) | 1998-04-30 | 1999-04-13 | INITIALIZING AND RESTARTING OPERATING SYSTEMS |
AU34922/99A AU3492299A (en) | 1998-04-30 | 1999-04-13 | Initializing and restarting operating systems |
DE69923085T DE69923085T2 (en) | 1998-04-30 | 1999-04-13 | INITIALIZING AND RESTARTING OPERATING SYSTEMS |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/070,419 US6173417B1 (en) | 1998-04-30 | 1998-04-30 | Initializing and restarting operating systems |
US09/070,419 | 1998-04-30 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO1999057632A2 true WO1999057632A2 (en) | 1999-11-11 |
WO1999057632A3 WO1999057632A3 (en) | 1999-12-16 |
Family
ID=22095171
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US1999/008032 WO1999057632A2 (en) | 1998-04-30 | 1999-04-13 | Initializing and restarting operating systems |
Country Status (11)
Country | Link |
---|---|
US (2) | US6173417B1 (en) |
EP (1) | EP1137987B1 (en) |
JP (1) | JP3598272B2 (en) |
KR (1) | KR100430468B1 (en) |
CN (1) | CN1118750C (en) |
AT (1) | ATE286606T1 (en) |
AU (1) | AU3492299A (en) |
DE (1) | DE69923085T2 (en) |
GB (1) | GB2353381B (en) |
TW (1) | TW428143B (en) |
WO (1) | WO1999057632A2 (en) |
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JP2002513964A (en) | 2002-05-14 |
GB2353381A (en) | 2001-02-21 |
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WO1999057632A3 (en) | 1999-12-16 |
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GB0022497D0 (en) | 2000-11-01 |
CN1299483A (en) | 2001-06-13 |
TW428143B (en) | 2001-04-01 |
ATE286606T1 (en) | 2005-01-15 |
US6393560B1 (en) | 2002-05-21 |
DE69923085D1 (en) | 2005-02-10 |
AU3492299A (en) | 1999-11-23 |
CN1118750C (en) | 2003-08-20 |
US6173417B1 (en) | 2001-01-09 |
JP3598272B2 (en) | 2004-12-08 |
EP1137987B1 (en) | 2005-01-05 |
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