Abstract: Methods for thermal management of an integrated circuit are disclosed. In particular, a dual control loop, having a first control loop and a second control loop, is used to maintain the temperature of an integrated circuit at a first temperature and a second temperature, respectively. In order to prevent the integrated circuit from overheating during periods of rapid temperature increase, the second control loop may be configured to control temperature at the second temperature below the specification limit of the integrated circuit by reducing power to the integrated circuit. The second control loop samples and maintains temperature of the integrated circuit at time intervals relatively faster than that of the first control loop. However, the second control loop is configured to release control to the first control loop when the temperature of the integrated circuit is reduced. The first control loop may then control power to the integrated circuit.

Abstract: In some implementations, a mobile device can be configured to monitor environmental, system and user events. The occurrence of one or more events can trigger adjustments to system settings. In some implementations, the mobile device can be configured to keep frequently invoked applications up to date based on a forecast of predicted invocations by the user. In some implementations, the mobile device can receive push notifications associated with applications that indicate that new content is available for the applications to download. The mobile device can launch the applications associated with the push notifications in the background and download the new content. In some implementations, before running an application or accessing a network interface, the mobile device can be configured to check energy and data budgets and environmental conditions of the mobile device to preserve a high quality user experience.

Abstract: Execution control techniques are described for use in a translator that converts subject code into target code. The translator includes a translator trampoline function that is called from a translator run loop and which in turn calls either to a translator code generator to generate target code, or else calls previously generated target code for execution. Control then returns to the translator trampoline function to make a new call, or returns to the translator run loop. Other aspects include making context switches through the trampoline function and setting first and second calling conventions either side of the trampoline function. Jumping directly or indirectly between target code blocks during execution is also described.

Abstract: A linked multiple independent control system can include two or more independent controllers configured to cooperatively control operating points of a system. In one particular embodiment, the linked multiple independent control system can control operating temperatures of a computing device. In one embodiment, the independent controllers can operate in parallel to develop control effort signals that are used by the computing device to affect operating parameters of one or more components included in the computing device. In another embodiment, independent controllers can have independent temperature thresholds that can affect control effort signals only from the related controller.

Abstract: An execution control method is described for use in a translator (19) which converts subject code (17) into target code (21). The translator (19) includes a translator trampoline function (191) which is called from a translator run loop (190) and which in turn calls either to a translator code generator (192) to generate target code, or else calls previously generated target code (212) for execution. Control then returns to the translator trampoline function (191) to make a new call, or returns to the translator run loop (190). Other aspects include making context switches through the trampoline function (191) and setting first and second calling conventions either side of the trampoline function (191). Jumping directly or indirectly between target code blocks (212) during execution is also described.

Abstract: A target computing system performs program code conversion from subject code, executable by a subject computing architecture, into target code executable by the target computing system, and then executes the target code. The target system handles exceptions during binding to native code. Native code binding executes a portion of native code in place of translating a portion of the subject code into the target code. Upon an exception during execution of the portion of native code, the target system saves a target state representing a current point of execution for the portion of native code, and creates a subject state representing an emulated point of execution in the subject architecture. A subject exception handler handles the exception with reference to the subject state. Upon resuming execution from the exception using the subject state, the saved target state is restored to resume execution in the section of portion of native code.

Abstract: Precise exception handling relies on a precise subject state including an accurate program counter and register values of a subject processor. Subject code (17) is translated into target code (21) executable by a target processor (13). The generated target code (17) includes counterpart target instructions (214) associated with fault-vulnerable subject code instructions (174). Further, each of the counterpart target code instruction (214) is associated with recovery information (195). When an exception (e.g. a fault) occurs, the recovery information (195) is retrieved and used to recover a precise subject state, in particular by taking account of optimizations to generate the common-case target code (21). The precise subject state is then used to precisely handle the exception.

Abstract: Described is method and apparatus for handling exception signals in combination particularly with the dynamic conversion of binary code executable by a one computing platform into binary code executed instead by another computing platform. An exception handling unit selectively handles some exception signals with respect to a target state and handles others with respect to a subject state derived from the target state. Signal handling sub-units are arranged to process the exception signal with respect to the target state and output a request either to return to execution or to pass on the exception signal. A delivery path selection unit is arranged to determine a delivery path of the exception signal to a selected group of the plurality of signal handling sub-units. A signal control unit is arranged to deliver the exception signal in turn to each of the selected group of signal handling sub-units.