Abstract: An enhanced Java Bytecode verifier suitable for operation in a Java computing environment is disclosed. The enhanced Java Bytecode verifier operates to determine whether one or more Java conventional Bytecode commands within a stream of Bytecodes are likely to place a reference to a Java object on the execution stack. In one embodiment, the conventional Java Bytecode commands identified as such are translated by the enhanced Java Bytecode verifier into one or more corresponding Java commands. When a corresponding command is executed, the reference associated with the conventional Java command is placed on a reference stack as well as the execution stack.

Abstract: An apparatus and method for distributing multiple clock signals to multiple devices using an encoded clock signal is provided. A source clock signal can be encoded to result in an encoded system clock. The encoded system clock can be distributed to multiple devices in a computer system. The devices can decode the encoded system clock signal to generate a system clock signal and a global clock signal. The system clock signal and the global clock signal can then be distributed to their respective clock loads on each device. In certain embodiments, additional information, such as state information, can be encoded into the encoded system clock. A device can be configured to decode the additional information and can alter its state accordingly.

Abstract: A computer system includes a register that is configured to contain a zero value. In response to a predetermined occurrence on the computer system, such as a hardware interrupt, the computer system launches a trap routine. This routine generates output data that needs to be stored within the memory space of the computer system. In order to write out this data from within the trap routine, a desired target address is specified as a negative offset from the zero value stored in the register. This avoids the need to have to locate another (unused) register in which to store the write address.

Abstract: A smaller footprint is loaded into the virtual machine by loading only those methods of library classes that the executed application actually requires. This is accomplished by taking the classes of the targeted application and statically determining which methods of these classes, as well as of the library classes, can actually be used by the application. A generated method usage map of usable methods for each class are saved in a file. At runtime, the virtual machine consults this file and selectively loads into memory only those classes listed in the file. This saves memory space in the virtual machine and speeds execution.

Abstract: A method and device divides a dividend by a divisor, the dividend and the divisor both being integers. The method and device determine a maximum possible number of quotient digits (NDQ) based on a number of significant digits of the divisor and the dividend, normalizes the dividend and divisor, and calculates NDQ number of quotient digits from the normalized divisor and dividend.

Abstract: A technique for incrementally collecting enormous objects including scanning portions of the enormous objects on different collection steps. The scanning can be accomplished with a number of collection sets where the enormous object is re-linked and older cars remembered sets are updated on subsequent collection steps. Unscanned portions of the enormous object are scanned on subsequent collection cycles until the enormous object has been fully scanned. This incremental collection can be performed concurrently with collections of other generations and applications.

Abstract: Methods, systems and articles of manufacture consistent with the present invention configure a computing system with a logging service that interacts with implementation objects associated with particular types of storage devices through a storage interface. The implementation objects may include processes used to access the storage devices during logging operations. The logging service may also be configured to adjust which storage device is to be used for logging operations without restarting the computing system. This adjustment may be made through a property file that includes properties specific to individual types of storage devices. The property file may be modified to include new properties by a system administrator or by the logging service during runtime operations of the computing system. The new properties may designate new storage devices to be used by the logging service to perform subsequent logging operations.

Abstract: A garbage collector that divides a dynamically allocated heap into car sections grouped into trains in accordance with the train algorithm subdivides large trains into subtrains. When an object that is reachable from the train-algorithm-managed generation of the heap is evacuated from a car being collected during a collection increment, it is placed into the last car in the subtrain in which the reference to it resides, even if that car is not the last car in the train to which the reference's subtrain belongs. The train-algorithm test for dead trains is performed not only on top-level trains but also on sub-trains.

Abstract: A storage system comprises a storage array controller and a storage array, which includes multiple storage devices and disk drive controllers. The storage array controller issues scrubbing operation commands to one or more of the disk drive controllers. In response, each disk drive controller that receives a scrubbing operation command reads data from within a data range from at least one of the disk drives, calculates a new checksum for the data, and compares the new checksum to a preexisting checksum for the data. If the new checksum doesn't equal the preexisting checksum, the data within the data range is determined to be erroneous.

Abstract: Improved methods and apparatus suitable for accessing synchronized data in a broadcast system are disclosed. A synchronized data accessing system providing an interface that can be used by a data requester to access synchronized data is disclosed. The data requester can initiate a request to access synchronized data using the interface, and data can be made available and accessed by the data requester through the interface.

Abstract: A method and system to allow user applications can access hardware platform-specific configuration information in a generic way. A platform independent framework lies on a layer that interfaces with the operating system layer. Accordingly, when a platform is changed, the operating system layer is notified of the change to facilitate informing the user of the change. This framework also has a plug-in publishing interface that is used to develop platform-specific modules to publish or export hardware configurations to other users. In another embodiment, this framework has a user interface that allows the user to make the necessary changes to the system management and hardware diagnostic tools whenever the platform is changed to ensure that the tools function correctly.

Abstract: A method for providing a next clock edge value calculation includes obtaining a clock file data, calculating a next clock edge value using the clock file data, and generating an output file using the next clock edge value. A method for providing an nth clock edge value calculation includes obtaining a clock file data and an n value calculating an nth clock edge value using the clock file data and the n value, and generating an output file using the nth clock edge value.

Abstract: A method for updating code includes receiving an update command for a first program resident in a first code space including at least one segment, transferring program control to a second program executing in second code space including one or more segment, selecting one of the at least one segment, mapping the selected segment to data space and writing the selected segment. A method for detecting corrupt software code includes defining a correlation rule for a program that includes at least one segment that includes multiple markers. The correlation rule defines a relationship between two or more of the markers. The method also includes writing the program to a memory device, reading two or more of the markers from the memory device, determining whether a segment is corrupt by applying the correlation rule to the two or more markers and indicating whether the segment is corrupt based upon the determining.

Abstract: A data network provides independent transmission channels for transmitting high bandwidth and low latency information data packets between nodes. The data information packets are organized into at least two groups of data packets according to predetermined criteria. The predetermined criteria includes a latency budget of the data packets, the size of the data packets and the type of operation. The low latency channel is also coupled to transmit control information relating to network protocol.

Abstract: A handheld computing device is used to copy files from the screen of a fixed computer. The display of the handheld device is linked to that of the underlying computer and file and directory icons together with their underlying files are copied to the handheld device. Files from the handheld device can also be transferred to the fixed computer. When a user is running a program on the fixed computer, he may capture the state of that computer and transfer everything needed to permit execution of that program to continue uninterrupted on the handheld device. Thus files and executing programs may be lifted from the fixed computer and used on the handheld device.

Abstract: A system that solves a global inequality constrained optimization problem specified by a function ƒ and a set of inequality constraints pi(x)?0(i=1, . . . , m), wherein ƒ and pi are scalar functions of a vector x=(x1, x2, x3, . . . xn). The system performs an interval inequality constrained global optimization process to compute guaranteed bounds on a globally minimum value of the function ƒ(x) subject to the set of inequality constraints. The system applies term consistency and box consistency to a set of relations associated with the global inequality constrained optimization problem over a subbox X, and excludes any portion of the subbox X that violates the set of relations. The system also performs an interval Newton step on the subbox X to produce a resulting subbox Y. The system integrates the sub-parts of the process with branch tests designed to increase the overall speed of the process.

Abstract: A method for transparently optimizing data access. The method includes gathering information related to data usage when a system is processing and determining a usage pattern of the system using gathered information.

Abstract: A system and method for rapid processing of scene-graph-based data and/or programs is disclosed. In one embodiment, the system may be configured to utilize a scene graph directly. In another embodiment, the system may be configured to generate a plurality of structures and thread that manage the data originally received as part of the scene graph. The structures and threads may be configured to convey information about state changes through the use of messaging. The system may include support for messaging between threads, messaging with time and/or event stamps, epochs to ensure consistency, and ancillary structures such as render-bins, geometry structures, and rendering environment structures.

Abstract: Disclosed are novel methods and apparatus for efficiently providing concurrently programmable dynamic memory built-in self-testing (BIST). In an embodiment of the present invention, a method of utilizing a BIST system is disclosed. The method includes: loading setup data into a configuration register; loading a first instruction into a shift register; loading the first instruction into an update register; executing the loaded first instruction to perform a memory test; upon receiving a first update command, loading a second instruction into the shift register; and upon receiving a second update command, loading the second instruction into the update register.

Abstract: A technique for adjusting a communication system involves a link, where the link includes a data line arranged to transmit a data signal and a clock line adapted to transmit a clock signal. The technique uses one or more counters to test the transmission across the link. Dependent on one or more of these counters, a test circuit, connected to the link, compares a known test pattern signal to a latched test pattern signal transmitted on the data line. The test circuit includes an adjustment circuit arranged to generate an adjustable clock signal from the clock signal, where the adjustable clock signal determines when to latch the transmitted test pattern signal The test circuit adjusts a timing of the adjustable clock signal relative to the data signal of the link.

Abstract: An electrolytic cell which comprises at least one anode and at least one cathode, an inlet channel through which liquor may be charged to the electrolytic cell, and an outlet channel through which liquor may be removed from the electrolytic cell, in which the outlet channel is operatively connected to the inlet channel, and in which the inlet channel comprises an ejector. The inlet and outlet channels may be formed in a unit made up of a plurality of shaped sheets, e.g. of electrically non-conducting plastics material, which together form the inlet and outlet channels.