34results about How to "Reduce context switching" patented technology

A prerequisite-based scheduler is disclosed which takes into account system resource prerequisites for execution. Tasks are only scheduled when they can successfully run to completion and therefore a task, once dispatched, is guaranteed not to become blocked. In a prerequisite table, tasks are identified horizontally, and resources needed for the tasks are identified vertically. At the bottom of the table is the system state, which represents the current state of all resources in the system. If a Boolean AND operation is applied to the task prerequisite row and the system state, and if the result is the same as the prerequisite row, then the task is dispatchable. In one embodiment of the present invention, the prerequisite based scheduler (dispatcher) walks through the prerequisite table from top to bottom until a task is found whose prerequisites are satisfied by the system state. Once found, this task is dispatched.

Optimizations are provided for frame management operations, including a clear operation and/or a set storage key operation, requested by pageable guests. The operations are performed, absent host intervention, on frames not resident in host memory. The operations may be specified in an instruction issued by the pageable guests.

The present subject matter relates to computer operating systems, network interface cards and drivers, CPUs, random access memory and high bandwidth speeds. More specifically, a Linux operating system has specially-designed stream buffers, polling systems interfacing with network interface cards and multiple threads to deliver high performance, high bandwidth packets through the kernel to applications. A system and method are provided for capturing, aggregating, pre- analyzing and delivering packets to user space within a kernel to be primarily used by intrusion detection systems at multi-gigabit line rate speeds.

Provided are a system and method for implementing a database application while guaranteeing the independence of software modules. The system includes an XML processing unit, an SQL information unit, an object pool, and a scheduler. The system can ensure the independence of software modules and the flexibility of developing a database application, reduce the development and maintenance cost of software programs, and guarantee the independence of software programs.

The invention discloses an operating system and a management method. The operating system comprises: a plurality of kernel service modules operated in kernel state corresponding to the system calling type, which are distributed on at least one processor and/or processor kernel; a plurality of application managing modules used for managing application procedure and application progress are distributed on different processor and/or processor kernel from the kernel service modules, which are used for managing application procedure and application progress; the kernel service modules are communicated with the application procedure through a system calling information. The management method comprises: step S1, the application system sends the system calling information, and then executes codes without dependent relation with the system calling result after sending the information; step S2, the kernel service module receives the system calling information and sends the system calling result back to the application procedure; step S3, the application procedure receives the system calling result and executes codes with dependent relation with the system calling result.

The invention discloses a memory migration method and a memory migration device. The memory migration method comprises the steps of: when a memory data migration request of a random source node in a storage system is received, dividing to-be-migrated data according to memory blocks on the basis of continuity of physical addresses of the to-be-migrated data, and determining the number of occupied memory blocks of the source node after dividing of the to-be-migrated data; acquiring memory blocks of which the number is same with the number of the occupied memory blocks of the source node after dividing of the to-be-migrated data in a target node in the storage system; and migrating the to-be-migrated data to the memory blocks in the target node according to the divided memory blocks. The invention further discloses a corresponding memory migration device. According to the memory migration method provided by the embodiment of the invention, through combining and dividing the to-be-migrated data according to the memory blocks, the memory blocks with continuous physical addresses are acquired from the target node; the to-be-migrated data are migrated from the source node to the memory blocks of the target node according to the memory blocks; and the number of context switching in migration can be reduced and a memory migration efficiency can be improved in the memory migration process.

The invention provides a communication method of vehicle rental information of a public transportation system and a communication system, solves the problem of data communication between a vehicle rental supervision system and a lot of rental stations in a B/S mode, improves the maximum amount of concurrent users capably being carried, and improves data transmission efficiency. The communication method comprises operating the vehicle rental supervision system in a Windows system application service mode, establishing a communication service terminal according to an IOCP finished port model, and creating a fixed number of communication interface working thread to be used to perform asynchronous communication with the various rental stations; and, after TCP connection between the rental stations and the communication service terminal is established, all interaction data call a JSON data protocol so as to perform packaging and parsing.

In an embodiment, a processor may include a register file including one or more sets of registers for one or more data types specified by the ISA implemented by the processor. The processor may have a processor mode in which the context is reduced, as compared to the full context. For example, for at least one of the data types, the registers included in the reduced context exclude one or more of the registers defined in the ISA for that data type. In an embodiment, one half or more of the registers for the data type may be excluded. When the processor is operating in a reduced context mode, the processor may detect instructions that use excluded registers, and may signal an exception for such instructions to prevent use of the excluded registers.

The embodiment of the invention discloses a data storage method, a device and a computer-readable storage medium, wherein protocol components corresponding to each shared protocol type are pre-established; the program code for communicating with the cloud is integrated into the protocol components. When the local device receives the data, according to the shared protocol type of the data, the corresponding target protocol component is called, and the communication link with the cloud can be established. Data is transferred to the cloud over this communication link. In the technical scheme, theprotocol component is establish beforehand, direct communication with the cloud can be realized, the context switch between the kernel state and the user state is reduced, the flow of data transmission is simplified, the time spent in data transmission is save, and the data processing performance of the local equipment is further improved.

The embodiment of the invention provides an optimization method and device for system performance. The method comprises the steps that interactive resources of a first function module and a second function module are associated by the configuration of a first message processing interface of the first function module; the first function module is merged with a current thread corresponding to the second function module according to the interactive resources, so that when the current thread receives messages sent from other threads from the interactive resources, function modules corresponding to the messages can be recognized according to destination addresses carried by the messages, and the recognized function modules are operated. According to the optimization method and device for the system performance, the processes of context switches and message interaction between the threads are reduced, and the interactive resource waste caused by frequent multi-thread switches is reduced.

The invention discloses a data processing method and device. The data processing method comprises the steps of obtaining information of a first buffer area; acquiring a first cache data block corresponding to the first buffer area according to the information of the first buffer area and a mapping relationship between the buffer area and the cache data block; setting a writing state of the first cache data block to forbid a reading operation for the first cache data block; obtaining a version number of the first cache data block; judging whether the obtained version number of the first cache data block is the same as the current version number of the first cache data block or not; If yes, writing data to be written into the first cache data block, and clearing a writing state of the firstcache data block to allow a reading operation for the first cache data block. By adopting the data processing method provided by the invention, the problem of concurrence of cache data reading and writing of a single producer and multiple consumers is solved.

The present invention relates to a multicore communication processing service. More specifically, aspects of the present invention provide a technology for converting a plurality of data packet units into one jumbo frame unit, copying the converted jumbo frame to a plurality of dual in-line memories (DIMMs) by logical distribution, and computing the jumbo frame through each CPU including multicore processors corresponding to the plurality of DIMM channels, thereby reducing the number of packets per second and securing efficiency in memories and CPU resources, and also adding/removing a header field for each data packet included in the jumbo frame according to a path transmitted or received from a network interface card (NIC) of the jumbo frame or processing the data packet using the header field only, thereby minimizing packet receive event and reducing context switching generated upon the packet receive event, which results in improvement of jumbo frame processing performance.

The invention discloses a file log monitoring method and system and computing equipment, and relates to the technical field of file systems. The method is executed in an operating system of the computing device, a file operation monitoring module is established between a virtual file system and a real file system in a kernel of the operating system, the file operation monitoring module comprises a log manager, the log manager comprises a log cache queue, the kernel further comprises a network stack, and the network stack is connected with the virtual file system and the real file system. The method comprises the steps that a file operation monitoring module obtains a file operation event from a virtual file system, converts the file operation event into a corresponding file log and adds the file log to a log cache queue; and the log manager obtains the file log from the log cache queue, sends the file log to a buffer area of the network stack through the Socket, and sends the file log to the log monitoring server through the network stack. According to the technical scheme, the file log can be efficiently sent to the log monitoring server, and few system resources are occupied.