公开(公告)号：DE3778347D1

公开(公告)日：1992-05-21

申请号：DE3778347

申请日：1987-12-15

Applicant: IBM

Inventor： DIXON JERRY DUANE ,  SOTOMAYOR JR

IPC: G06F3/06 ,  G06F12/08 ,  G06F12/0866 ,  G06F12/16 ,  G11B20/18

Abstract: In a DASD caching system, in which pages of sectors of data are stored by reading in a desired sector and prefetching a plurality of adjacent sectors for later access, errors in disk storage media cause error signals to be generated. Such errors are handled by storing indications of which sectors have errors and which do not, and accessing such indications in response to later requests for such sectors. Such indications are stored in each page in the cache. Further, a history is maintained of which pages and sectors therein, were placed in the cache in the past.

公开(公告)号：DE3810233A1

公开(公告)日：1988-10-20

申请号：DE3810233

申请日：1988-03-25

Applicant: IBM

Inventor： DIXON JERRY DUANE ,  SOTOMAYOR JR

IPC: G06F3/06 ,  G06F12/08 ,  G06F12/0866 ,  G06F12/16 ,  G11B20/18

Abstract: In a DASD caching system, in which pages of sectors of data are stored by reading in a desired sector and prefetching a plurality of adjacent sectors for later access, errors in disk storage media cause error signals to be generated. Such errors are handled by storing indications of which sectors have errors and which do not, and accessing such indications in response to later requests for such sectors. Such indications are stored in each page in the cache. Further, a history is maintained of which pages and sectors therein, were placed in the cache in the past.

公开(公告)号：DE69423853T2

公开(公告)日：2000-10-19

申请号：DE69423853

申请日：1994-11-11

Applicant: IBM

Inventor： GOLUB DAVID BARNETT ,  RAWSON III FREEMAN LEIGH ,  SOTOMAYOR JR

IPC: G06F13/10 ,  G06F9/46

Abstract: A system and method is provided for managing input/output (I/O) resources in a computer system. The system includes a hardware resource manager which tracks the use of the I/O resources. In addition, the hardware resource manager can allocate the resources between device drivers and provide a standard implementation to be used by device drivers.

公开(公告)号：DE69516350D1

公开(公告)日：2000-05-25

申请号：DE69516350

申请日：1995-06-16

Applicant: IBM

Inventor： MAGEE JAMES MICHAEL ,  SOTOMAYOR JR ,  YOUNGWORTH CHRISTOPHER DEAN

IPC: G06F15/16 ,  G06F9/46 ,  G06F9/54 ,  G06F15/177

Abstract: A microkernel interprocess communication subsystem and method provide fast and efficient communication between clients and servers in uniprocessing, multiprocessing, and distributed processing environments. A microkernel operating system includes a capability engine module that manages capabilities or rights to map regions of the memory shared by multiprocessing tasks. There is a wide range of port rights that can be attributed to a task port; various permission levels, security levels, priority levels, processor and resource availability, etc. The capability engine analyses these rights and selectively enables transfers between tasks. In this manner, the capability engine manages the interprocess communication that must take place between the many clients and servers in a Microkernel System, in a fast and efficient manner.

公开(公告)号：DE69529310T2

公开(公告)日：2003-10-16

申请号：DE69529310

申请日：1995-03-15

Applicant: IBM

Inventor： RAWSON III ,  SOTOMAYOR JR

IPC: G06F1/20 ,  G06F1/26 ,  G06F1/32 ,  G06F9/44 ,  G06N5/04

Abstract: A power management architecture in a data processing system comprising physical devices having at least one state, each state has corresponding power value, and where a system state is defined as the set of all current states of the physical devices. Power objects and thermal objects, each corresponding to a physical device, contain information about the power requirements and thermal characteristics of each possible state for that physical device. The power and thermal objects also describe the allowed state transitions from each possible state to another state, and the power requirements and thermal characteristics of all possible state transitions. Also communicated is the current state of each physical device. Event means generate signals indicating the occurrence of an event in the system. A policy module contains rules, implementing the power management, that direct an action, the rules being a function of events and of power object information. A controller, in communication with the physical devices, the thermal and power objects, the event means, and the policy module, changes the state of any one of the physical devices in response to an event. The controller determines whether to change a physical device state based on the policy module rules.

公开(公告)号：DE69529310D1

公开(公告)日：2003-02-13

申请号：DE69529310

申请日：1995-03-15

Applicant: IBM

Inventor： RAWSON III ,  SOTOMAYOR JR

IPC: G06F1/20 ,  G06F1/26 ,  G06F1/32 ,  G06F9/44 ,  G06N5/04

Abstract: A power management architecture in a data processing system comprising physical devices having at least one state, each state has corresponding power value, and where a system state is defined as the set of all current states of the physical devices. Power objects and thermal objects, each corresponding to a physical device, contain information about the power requirements and thermal characteristics of each possible state for that physical device. The power and thermal objects also describe the allowed state transitions from each possible state to another state, and the power requirements and thermal characteristics of all possible state transitions. Also communicated is the current state of each physical device. Event means generate signals indicating the occurrence of an event in the system. A policy module contains rules, implementing the power management, that direct an action, the rules being a function of events and of power object information. A controller, in communication with the physical devices, the thermal and power objects, the event means, and the policy module, changes the state of any one of the physical devices in response to an event. The controller determines whether to change a physical device state based on the policy module rules.

公开(公告)号：DE69423853D1

公开(公告)日：2000-05-11

申请号：DE69423853

申请日：1994-11-11

Applicant: IBM

Inventor： GOLUB DAVID BARNETT ,  RAWSON III FREEMAN LEIGH ,  SOTOMAYOR JR

IPC: G06F13/10 ,  G06F9/46

Abstract: A system and method is provided for managing input/output (I/O) resources in a computer system. The system includes a hardware resource manager which tracks the use of the I/O resources. In addition, the hardware resource manager can allocate the resources between device drivers and provide a standard implementation to be used by device drivers.