158 results about "Memory copy" patented technology

A data processing system includes a processing unit, a distributed memory including a local memory and a remote memory having differing access latencies, and a cache coupled to the processing unit and to the distributed memory. The cache includes a congruence class containing a plurality of cache lines and a plurality of latency indicators that each indicate an access latency to the distributed memory for a respective one of the cache lines. The cache further includes a cache controller that selects a cache line in the congruence class as a castout victim in response to the access latencies indicated by the plurality of latency indicators. In one preferred embodiment, the cache controller preferentially selects as castout victims cache lines having relatively short access latencies.

A coherence controller is included in a module which includes a plurality of multiprocessor units, each of which contains a main memory and processors equipped with respective cache memories. The module may be one of a plurality of similarly constructed modules connected by a router or other type of switching device. The coherence controller in each module includes a cache filter directory having a first filter directory for guaranteeing coherence between the local main memory and the cache memory in each of the processors of the module, and an external port connected to at least one of the other modules. The cache filter directory also includes a complementary filter directory, which tracks locations of lines or blocks of the local main memory copied from the module into other modules, and for guaranteeing coherence between the local main memory and the cache in each of the processors of the module and the other modules.

One embodiment of the present invention sets forth a technique for reducing the copying of data between memory allocated to a primary processor and a coprocessor is disclosed. The system memory is aliased as device memory to allow the coprocessor and the primary processor to share the same portion of memory. Either device may write and/or read the shared portion of memory to transfer data between the devices rather than copying data from a portion of memory that is only accessible by one device to a different portion of memory that is only accessible by the other device. Removal of the need for explicit primary processor memory to coprocessor memory and coprocessor memory to primary processor memory copies improves the performance of the application and reduces physical memory requirements for the application since one portion of memory is shared rather than allocating separate private portions of memory.

A method is provided for communicating data in an interconnect system comprising a plurality of nodes. In one aspect, the method includes: issuing a command packet from a first node, the command packet comprising a respective header quadword and at least one respective data quadword for conveying a command to a second node, wherein the command is selected from a group comprising a direct memory access (DMA) command, an administrative write command, a memory copy write command, and a built in self test (BIST) command; receiving the command packet at the second node; issuing an acknowledgement packet from the second node, the acknowledgement packet comprising a respective header quadword for conveying an acknowledgement that the command packet has been received at the second node.

An invention for migrating managed application state for a Java based application is disclosed. A first Java module is executed on a first server. The first Java module includes a first entity bean and a first state object in communication with the first entity bean. The first state object stores a state of the first entity bean. The first state object is replicated to a state server or stored in-memory and made capable of migration by replicated state manager. Then, a second Java module is started on a second server as part of the module migration by a control module. The second Java module includes a second state object that is populated with state by either recovering from replica of fist state object stored on the state server or by getting transferred state of an in-memory copy of first state object managed on first server.

A method and apparatus for optimal handling of high bandwidth streaming data in a computer system minimizes computational activities to achieve maximal performance. This performance improvement is accomplished by minimizing the amount of memory copying and also by minimizing the number of allocation and deallocations of objects which occur. Memory copying is a CPU/bandwidth intense operation when there is high speed streaming data on the input. The allocation and deallocation of objects is a system resource intense activity and requires a very significant amount of CPU processing per invocation in a computing device. Using a combination of techniques, the invention provides a technique that reduces both the number of memory copies as well as the number of objects which get allocated and deallocated during the course of operating on the streaming media data.

The invention relates to a method for processing business application through multiple threads. The method simply includes the steps of creating a business scheduling thread, creating an activation circulating business drive thread, registering a scheduling state detection task, starting a default or assigned processing thread number for business processing types, distributing a lockless queue for each business processing thread, selecting the business processing thread which is not busy relatively, obtaining business processing information from the lockless queue of the selected business processing thread for processing, setting the reference count of a data area in the business processing information to be zero through the business processing thread, and feeding back the information when the business scheduling thread receives the information indicating that processing is finished. The method has the advantages that according to current processing capacity, the concurrence number of the threads is controlled, unnecessary memory copy is reduced, use of a system lock is reduced, new business processing types can be added in the running period, business expansibility of a system is improved, system operation efficiency is improved, resource utilization flexibility of the system is improved, and the development period of the business system is shortened.

The invention discloses a method of network processor for copying the message and a network processor, belonging to the communication field. The method includes: after receiving the message, the message is written into the external memory; when determining that the message is needed to be copied, the packaging head of the message and copied message of the message are generated; transmitting the packaging head of the message, then reading and transmitting the message load of the message. The network processor includes: a receiving unit, a processing unit ad a transmitting unit. The invention realizes the aim of copying the message through transmitting the packaging head and the message load for two times, meanwhile no memory copy is processed when processing the message, and no new resource blocks is applied, which advances the performance of copying the message, further strengthening the transmitting capability to bear the operations for the network processor.

The embodiment of the invention discloses a memory processing method and memory management equipment. The method comprises the steps: receiving a memory dump request by the memory management equipment, wherein the memory dump request contains a process identification (PID), and memory pages of the process corresponding to the PID are needed dump memory pages; according to the PID, querying a process page table, and acquiring the memory pages of the process corresponding to the PID; if the attributes of the memory pages are read only attributes, carrying out backups of the memory pages in a memory; and sending a first backup request to external memory so that the external memory copies the backup memory pages into the external memory, wherein the first backup request contains the memory pages of the backups, and can ensure the data consistency while realizing online memory dump.

A system, method, and a computer readable for protecting content of a memory page are disclosed. The method includes determining a start of a semi-synchronous memory copy operation. A range of addresses is determined where the semi-synchronous memory copy operation is being performed. An issued instruction that removes a page table entry is detected. The method further includes determining whether the issued instruction is destined to remove a page table entry associated with at least one address in the range of addresses. In response to the issued instruction being destined to remove the page table entry, the execution of the issued instruction is stalled until the semi-synchronous memory copy operation is completed.

An discussion of an address translation for a source and a destination of the data that utilizes different page tables. For example, a direct memory access (DMA) engine is used as a memory-to-memory copy engine by utilizing a page-table walk and address translation for a source side of the copy, and an independent page-table walk and address translation for a destination side of the copy.

A system, method, and a computer readable for inserting data into a cache memory based on information in a semi-synchronous memory copy instruction are disclosed. The method comprises determining a start of a semi-synchronous memory copy operation. The semi-synchronous memory copy operation is checked for a given value in at least one cache injection bit. In response to the given value in the cache injection bit, a predefined number of lines of destination data is copied into at least one level of cache memory.

Disclosed are an apparatus for a high-speed streaming data transmission using a PMEM controller and a method thereof. The PMEM controller (i.e., an I/O processor) transmits data stored in a storage device to a network through a process for a PMEM to local copy of the data between a large-capacity PM (Peripheral Memory) and a main memory or for a PMEM to PMEM copy of the data in the PM. According to this process, the data transmission speed can be improved. Also, by reducing the memory copy of disc streaming data, the interference with the main processor can be minimized, and thus high-quality streaming data can be supported.

A system, method, and computer program product for semi-synchronously copying data from a first portion of memory to a second portion of memory are disclosed. The method comprises receiving, in a processor, a call for a semi-synchronous memory copy operation. The semi-synchronous memory copy operation preserves temporal persistence of validity for a virtual source address corresponding to a source location in a memory and a virtual target address corresponding to a target location in the memory by setting a flag bit. The call includes at least the virtual source address, the virtual target address, and an indicator identifying a number of bytes to be copied. The memory copy operation is placed in a queue for execution by a memory controller. The queue is coupled to the memory controller. At least one subsequent instruction is continued to be executed as the subsequent instruction becomes available from an instruction pipeline.

The invention discloses a rapid implementation method based on an embedded program and a system thereof. The system comprises a starting unit which is used for guiding an embedded system for initialization and the like, a core unit which is used for connection between the bottom layer and the top layer of the embedded system, a file system unit which is used for managing and storing file information, an API function library unit which is used for storing API functions, an API function table unit which is used for locating and finding the API functions, an application program unit which is used for operation of application programs and a memory copying unit which is used for upgrading an operating system. The technical scheme of the invention simplifies the complex dynamic loading process during operation of the program, realizes the quick link of application programs and library functions, and improves the operating speed of the programs.

The invention discloses a method and a device for accelerating a memory copy of a microprocessor. The method comprises the following steps : firstly, adding a memory copy unit in the microprocessor; secondly, transmitting a memory copy instruction obtained by decoding according to a decoding logic to the memory copy unit; and detecting the correlation between a new memory copy request and other memory copy requests by the memory copy unit through a correlated detection part and caching the new memory copy request and the correlation thereof to a request queue; and thirdly, performing the current memory copy request with pages as unit and cooperatively performing the correlated memory copy requests. The device comprises the memory copy unit special for performing the memory copy request and the correlated detection part for detecting the correlation between the new memory copy request and the other memory copy requests in the queue. The method and the device disclosed by the invention have the advantages of high performance of the memory copy, simpleness in realization of hardware, small cost, excellent expansibility, strong compatibility, favorable concurrency, low access frequency and low power consumption.