Abstract: A data processing system includes an interrupt controller that counts, as an interrupt processing execution count, executions of interrupt processing by threads executed by data processing devices; and a processor that is configured to select one scheduling method from among a plurality of scheduling methods, based on the interrupt processing execution count.

Abstract: A given sensor node, upon determining that data processing requested by another sensor node cannot be completed by the given sensor node, selects a sensor node that based on hop count based information stored in a storage apparatus, is away from a receiver. The given sensor node transmits to the selected sensor node, request notification requesting execution of the data processing exclusive of an executable portion. The given sensor node executes the executable portion, upon receiving securement completion notification indicating that the execution of the data processing indicated in the transmitted request notification can be completed by at least one sensor node among plural sensor nodes.

Abstract: A thread processing method that is executed by a multi-core processor, includes supplying a command to execute a first thread to a first processor; judging a dependence relationship between the first thread and a second thread to be executed by a second processor; comparing a first threshold and a frequency of access of any one among shared memory and shared cache memory by the first thread; and changing a phase of a first operation clock of the first processor when the access frequency is greater than the first threshold and upon judging that no dependence relationship exists.

Abstract: A scheduling method that is executed by a first central processing unit (CPU) includes determining whether a task belongs to a first task category; determining whether a first access area accessed by the task is located in a first memory or a second memory, when the task belongs to the first task category; and setting a memory accessed by the task to the first memory or the second memory, based on a result at the determining.

Abstract: A scheduling method is executed by a given CPU among multiple CPUs. The scheduling method includes subtracting for each of the CPUs, a number of processes assigned to the CPU from a maximum number of speculative processes that can be assigned to each of the CPUs; summing results yielded at the subtracting to yield a total number of speculative processes; and assigning to the CPUs, speculative processes of a number is less than or equal to the total number of speculative processes.

Abstract: A computer-readable recording medium stores a data sharing program that causes a processor of a first terminal to execute a process that includes detecting a communication bandwidth used between the first terminal and a second terminal that are communicably connected in an ad-hoc network; comparing the detected communication bandwidth and a bandwidth related to a storage apparatus of the first terminal; determining an operation scheme related to data sharing of data in the storage apparatus of the first terminal and data in a storage apparatus of the second terminal, based on a comparison result obtained at the comparing; notifying the second terminal of the determined operation scheme; and executing a mounting process that enables access of the storage apparatus of the first terminal by the second terminal, based on the determined operation scheme.

Abstract: A scheduling method is executed by a processor, and includes detecting a transition from a first process to a second process; acquiring from memory, an operating frequency and a CPU count for executing the second process; suspending a CPU under operation or starting a suspended CPU, based on the CPU count; and assigning the operating frequency to a CPU that is to execute the second process.

Abstract: A multicore processor system includes multiple processors; a device; a memory that stores information of voltage and clock frequency for minimizing power consumption in connection with a number of the processors accessing to the device; and a power control unit that controls the voltage and the clock frequency of the processors on the basis of the information stored in the memory if the number of the processors accessing to the device changes.

Abstract: Among plural communications nodes that transfer data to a communications apparatus by multihop communication, a communications node includes a transmitting circuit configured to transmit a synchronization request signal requesting transmission of a synchronization signal for synchronizing the multihop communication at the communications node; a receiving circuit configured to receive the synchronization signal in response to the synchronization request signal transmitted by the transmitting circuit; and a power control circuit configured to control the receiving circuit such that a state of the receiving circuit is a first state where power consumption of the receiving circuit is a first power before the transmitting circuit transmits the synchronization request signal and is a second state where the power consumption of the receiving circuit is a second power that is higher than the first power after the transmitting circuit transmits the synchronization request signal.

Abstract: An analysis method includes detecting, by a computer, a malfunctioning node count of nodes malfunctioning among plural nodes in a period during operation of a system configured to realize a function even when a portion of nodes malfunction among the plural nodes; and calculating, by the computer and based on the detected malfunctioning node count and the period, a count of nodes that malfunction per unit time after the period.

Abstract: A power supply control method includes detecting that a result of a first function performed by a first device ceases to be displayed on a display screen; suspending power supply to the first device and supplying power to a second device, based on a detection of the result ceasing to be displayed; and causing the second device to output a response signal to a CPU in response to a control signal from the CPU.

Abstract: A coprocessor stores to local memory, a driver execution start time, for each execution start of drivers. If a CPU call process is executed during the execution of driver A, the coprocessor calculates the difference of the execution start time and the current time, for drivers B and C. Taking driver C as an example, the coprocessor adds to the difference calculated for the driver C, a processing time required for the CPU call process of driver A and a processing time required for a normal process of driver B. The coprocessor determines whether respective addition results for driver C comply with respective time constraints. If it is determined that an addition result for the driver C cannot comply with the time constraint, and the coprocessor sends an execution request for driver C to another coprocessor.

Abstract: A sensor node executes any one among a first operation by which another sensor node is requested to execute data process and if the request is not accepted the sensor node starts executing the data processing after waiting for charging and a second operation by which the sensor node starts executing the data processing after waiting for charging, without requesting the data processing to be executed. The sensor node compares an expected value of a first time that elapses until execution is started by the sensor node or the other sensor node when the first operation is executed, and a second time that elapses until execution is started by the sensor node when the second operation is executed. Based on the comparison result, the sensor node executes among the first operation and the second operation, the operation for which the time that elapses until execution is started is shorter.

Abstract: A determining method includes obtaining by each monitoring apparatus among plural monitoring apparatuses disposed encompassing a given area having plural wireless communications apparatuses, hop count information that indicates a hop count of a wireless signal transmitted by one wireless communications apparatus among the wireless communications apparatuses and received by the monitoring apparatus via multi-hop communication by the wireless communications apparatuses; calculating by each monitoring apparatus, an estimated line that represents candidates of a position of the one wireless communications apparatus, the estimated line being calculated from an estimated distance between the monitoring apparatus and the one wireless communications apparatus, based on the hop count; correcting by each monitoring apparatus, the calculated estimated line based on information indicating a node-less area in which no wireless communications apparatus of the given area is present; and determining the position of the one w

Abstract: A data processor includes: a plurality of controllers that process data; a program memory that stores a standby instruction and a data processing instruction at a plurality of addresses respectively; and a queue that stores different execution start addresses for the plurality of controllers, wherein after the plurality of controllers sequentially access the queue, the plurality of controllers acquire the different execution start addresses from the queue in an order of the sequential access, start execution of instructions from the acquired different execution start addresses in the program memory, and execute the data processing instruction and execute the standby instruction the number of times different for each of the controllers.

Abstract: A communications network control method by a computer includes obtaining measurement area information indicating a measurement area of a sensor included in a communications node, the computer obtaining the measurement area information for each communications node in a communications node group that is included in a communications network and that is among plural communications nodes arranged in an arrangement area; obtaining divided area information indicating plural divided areas obtained by dividing the arrangement area; deriving for each divided area among the plural divided areas, a first value corresponding to a count of communications nodes that are in the communications node group and at least partially include the divided area in the measurement area indicated by the obtained measurement area information; and providing control of changing among the plural communications nodes, communications nodes included in the communications network, according to the first value derived for each divided area.

Abstract: An endian conversion method is executed by a CPU, and includes executing a program that includes endian conversion setting; and performing, when accessing an address of a main memory indicated in the endian conversion setting, endian conversion of data specified by the address of the main memory.

Abstract: A multi-core processor system includes a memory unit that for each input destination thread defined as a thread to which given data is input, stores identification information of an assignment destination core for the input destination thread; and a multi-core processor that is configured to update, in the memory unit and when assignment of the input destination thread to a multi-core processor is detected, the identification information of the assignment destination core for the input destination thread; detect a writing request for the given data; identify based on the given data for which the writing request is detected, the updated identification information among information stored in the memory unit; and store the given data to a memory of the assignment destination core that is indicated in the updated identification information and among cores making up the multi-core processor.

Abstract: A system includes communications nodes, respectively having a sensor; and a communications apparatus that simultaneously requests the communications nodes to transmit sensor data. A first communications node among the communications nodes, when determining that among a first state where the communications apparatus includes the first communications node when requesting transmission and a second state where the communications apparatus excludes the first communications node when requesting transmission, the first communications node is in the second state: determines whether a predetermined difference is present between a predetermined value and the sensor data of the first communications node, and transmits a notification signal that notifies the communications apparatus of the predetermined difference, when determining that the predetermined difference is present.

Abstract: A sensor node among sensor nodes that synchronously switch between a first state and a second state transmits an abnormality notification signal to a collecting apparatus when in the first state and an abnormality occurs at the sensor node. The sensor node, when in the second state, transmits to the communications apparatus, a data signal that differs from the abnormality notification signal. During each interval of the first state, the sensor node enters a third state during a first partial interval of the interval of the first state, and receives and transfers an abnormality notification signal transmitted by another sensor node among the sensor nodes. During each interval of the first state, the sensor node further enters a fourth state during a second partial interval of the interval of the first state and different from the first partial interval, and refrains from receiving the abnormality notification signal.