摘要:
A switching error detection and recovery mechanism recognizes that an I/O configuration has changed. Comparing new configuration data to previous data maintained in a CDT table structure, and detecting unequal path information, an error condition is recognized. After recognizing the error condition, recovery actions are taken to notify the operator and insure data integrity. The CDT is structured so that redundant data is eliminated, and so records may be efficiently and dynamically added and deleted.
摘要:
A switching error detection and recovery mechanism recognizes that an I/O configuration has changed. Comparing new configuration data to previous data maintained in a CDT table structure, and detecting unequal path information, an error condition is recognized. After recognizing the error condition, recovery actions are taken to notify the operator and insure data integrity. The CDT is structured so that redundant data is eliminated, and so records may be efficiently and dynamically added and deleted.
摘要:
A data processing I/O system including a main storage for storing data and data processing instructions arranged in software programs, and a channel subsystem having hardware for reporting conditions in the channel subsystem to the software. A special Channel Subsystem Call (CHSC) instruction is used to store event information from the channel subsystem into the main memory for use by the software such that new or restored resources such as a channel path, a channel path and partial control unit link address, or a channel path and full control unit link address, may be originally made accessible, or may be restored to the I/O system. A mechanism is also provided to inquire of a device how long it expects to not be accessible to give the device sufficient time to reset itself before it is varied offline, thus preventing a device from being isolated or "boxed" prematurely.
摘要:
Control unit level reset operations in systems having switched point-to-point I/O interface topologies is accomplished by determining and storing channel path identification numbers (CHPID's) and control unit link addresses (CULA's) for each device in the system, scanning this stored data to find devices whose CHPID's and CULA's match the CHPID and CULA for a device or a control unit having a reported error, quiescing devices with such matching CHPID's and CULA's, issuing a control unit level reset command and reactivating the quiesced devices. For systems having both multidropped and switched point-to-point topologies, provision is made for preliminarily determining whether a given control unit reset can be performed on the control unit level.
摘要:
Provides a software-to-software interface and a software-to-hardware interface between software users and a hardware ADM facility (ADMF) in a data processing system. Such software user presents only virtual addresses to the software-to-software interface in a MSB list. The user list defines virtual address spaces, including a "hiperspace", in a manner that represents physical backing media as different random-access electronic storages, such main storage (MS) and expanded storage (ES). The real data transfers are within or between the backing storages. The user list is transformed into an ADM operation block (AOB), which is assigned an ADM UCB in a UCB queue which is associated with an ADM subchannel. The software-to-hardware interface generates an ORB, containing the AOB address, as an operand of a SSCB instruction which is executed to queue the associated subchannel onto one of plural co-processor queues in the ADMF. The ADMF uses the AOB to perform the requested page moves, and generates an interruption upon completion of each request which is sent to the hardware-to-software interface to remove the associated ADMF request from the ADM software request queue and free the associated ADM UCB for use by another user request.
摘要:
A snoop coherency method, system and program are provided for intervening a requested cache line from a plurality of candidate memory sources in a multiprocessor system on the basis of the sensed temperature or power dissipation value at each memory source. By providing temperature or power dissipation sensors in each of the candidate memory sources (e.g., at cores, cache memories, memory controller, etc.) that share a requested cache line, control logic may be used to determine which memory source should source the cache line by using the power sensor signals to signal only the memory source with acceptable power dissipation to provide the cache line to the requester.
摘要:
A computer display system, method and article of manufacture are presented allowing a user to interactively arrange two-dimensional windows for display in three dimensions on a two-dimensional display screen of the computer system. A window manager associated with the display screen is configured to respond to a user's selection of a frame edge of a window, e.g., using a third mouse button, by rotating the window from a two-dimensional depiction to a three-dimensional depiction. Rotation of the window occurs on an edge frame opposite to the selected edge frame and the rotation angle is related to the magnitude that the user drags the pointing device after selection of one edge frame of the window to be swung. In a similar manner, multiple windows can be swung for three-dimensional viewing and simultaneous display within the display screen.
摘要:
A computer display system, method and article of manufacture are presented allowing a user to interactively arrange two-dimensional windows for display in three dimensions on a two-dimensional display screen of the computer system. A window manager associated with the display screen is configured to respond to a user's selection of a frame edge of a window, e.g., using a third mouse button, by rotating the window from a two-dimensional depiction to a three-dimensional depiction. Rotation of the window occurs on an edge frame opposite to the selected edge frame and the rotation angle is related to the magnitude that the user drags the pointing device after selection of one edge frame of the window to be swung. In a similar manner, a pointing indicator is superimposed within the rotated window for tracking within the rotated coordinates of the window in response to user manipulation of an associated pointing device.
摘要:
A mechanical seal construction employing a one-piece plastics packing ring of relatively rigid material for creating a sealed relationship between the nonrotatable seal ring and the stuffing box or gland. The packing ring has a main substantially rectangular body portion which defines an inner annular surface of substantial axial extent, which inner surface has a light interference fit with an opposed surface on the nonrotatable seal ring. A thin ringlike rib is integral with and externally surrounds the main body portion and projects radially outwardly therefrom, which rib is disposed in the axially central plane of the main body portion. This rib has the radially outer end or edge surface thereof maintained in a light interference fit with an opposed surrounding surface as defined on the gland or stuffing box. The seal areas are defined adjacent the axial end surfaces of the main body portion, one of which engages an opposed surface on the nonrotatable seal ring, and the other of which engages an opposed surface on either the gland or stuffing box.