Patent application number | Description | Published |
20090307707 | SYSTEM AND METHOD FOR DYNAMICALLY ADAPTIVE MUTUAL EXCLUSION IN MULTI-THREADED COMPUTING ENVIRONMENT - A system and associated method for mutually exclusively executing a critical section by a process in a computer system. The critical section accessing a shared resource is controlled by a lock. The method measures a detection time when a lock contention is detected, a wait time representing a duration of wait for the lock at each failed attempt to acquire the lock, and a delay representing a total lapse of time from the detection time till the lock is acquired. The delay is logged and used to calculate an average delay, which is compared with a suspension overhead time of the computer system on which the method is executed to determine whether to spin or to suspend the process while waiting for the lock to be released. | 12-10-2009 |
20090320028 | SYSTEM AND METHOD FOR LOAD-ADAPTIVE MUTUAL EXCLUSION WITH WAITING PROCESS COUNTS - A system and associated method for mutually exclusively executing a critical section by a process in a computer system. The critical section accessing a shared resource is controlled by a lock. The method measures a detection time when a lock contention is detected, a wait time representing a duration of wait for the lock at each failed attempt to acquire the lock, and a delay representing a total lapse of time from the detection time till the lock is acquired. The delay is logged and used to calculate an average delay, which is compared with a suspension overhead time of the computer system to determine whether to spin or to suspend the process while waiting for the lock to be released. The number of processes waiting for the lock and the number of processes suspended are respectively counted to optimize the method. | 12-24-2009 |
20100146494 | Compiler generator - A system including an input compiler that receives a unified input description containing syntax rules for both regular and context-free expressions and interspersed code, the first compiler configured to translate the unified input description into a common internal representation is disclosed. The system also includes a regular expression checker, a context-free expression checker, a code checker and a second compiler coupled to the code checker. | 06-10-2010 |
20100306848 | Method and Data Processing System to Prevent Manipulation of Computer Systems - The present invention relates to the field of computer technology, and relates in particular to a method and system to prevent computer programs and data of any kind stored in a computer system from being manipulated and in particular for preventing hacker attacks and virus infection in computer systems, wherein said computer system comprises a storage means able to be read from and to be written to, and a means for switching said storage means into a write-protected mode. In order to provide improved prevention, the following steps are proposed, either during boot or during an installation process of an application program: | 12-02-2010 |
20110145612 | Method and System to Determine and Optimize Energy Consumption of Computer Systems - A method, system and computer program product to manage energy consumption within a computing environment. Energy consumption of different hardware components are measured in the computing environment. Measurement includes voltage and current versus time used by the hardware components. The different measured values of energy consumption are collected, followed by tracking the hardware component used in time during an execution of an individual execution context within the computing environment. The energy consumption of the individual execution context is calculated by associating the corresponding collected measured energy consumption to the hardware component used. | 06-16-2011 |
20120185710 | DETERMINING AND OPTIMIZING ENERGY CONSUMPTION OF COMPUTER SYSTEMS - Management of energy consumption within a computing environment. Energy consumption of different hardware components are measured in the computing environment. Measurement includes voltage and current versus time used by the hardware components. The different measured values of energy consumption are collected, followed by tracking the hardware component used in time during an execution of an individual execution context within the computing environment. The energy consumption of the individual execution context is calculated by associating the corresponding collected measured energy consumption to the hardware component used. | 07-19-2012 |
20120216178 | COMPILER GENERATOR - A method of generating an executable that operates as a compiler includes: receiving a unified input description containing syntax rules for both regular and context-free expressions and interspersed code; generating a common internal representation from the unified input description; checking regular expressions in the common internal representation; checking context-free expressions in the common representation; checking the interspersed code; and outputting the executable. | 08-23-2012 |
20130096901 | Verifying Simulation Design Modifications - A mechanism is provided for verifying design modifications to a simulation design unit included within a simulation model of an integrated electronic device. A modified description is received of a simulation design unit that failed to meet an expected physical property value during an initial simulation of the entire integrated electronic device. A simulation of the simulation design unit is executed using a list of identified input signals from a trace file. The trace file is generated during the initial simulation and indicates state values for the list of identified input signals. A determination is made as to whether the simulation of the simulation design unit fails to meet the expected physical property value. An indication is generated that modifications made to an initial description of the simulation design unit are successful in response to the simulation of the simulation design unit meeting the expected physical property value. | 04-18-2013 |
20130246760 | CONDITIONAL IMMEDIATE VALUE LOADING INSTRUCTIONS - A data processor comprising a plurality of registers, and instruction execution circuitry having an associated instruction set, wherein the instruction set includes an instruction specifying at least a mask operand, a register operand and an immediate value operand, and the instruction execution circuitry, in response to an instance of the instruction, determines a Boolean value based on the mask operand and sets a respective one of a plurality of registers specified by the register operand of the instance to a value of the immediate value operand if the Boolean value is true. The instruction execution circuitry, in response to the instance of the instruction, may set the respective one of the plurality of registers specified by the register operand of the instance to zero if the Boolean value is false. | 09-19-2013 |