41 results about "Demand paging" patented technology

A virtual memory management unit (306) includes a redundancy insertion module (307) which is used for inserting redundancy into an encoded data stream to be compressed, such that after being compressed each logical data block fits into a different one from a set of equal-sized physical data blocks of a given size. For example, said redundancy may be given by no-operation (NOP) instructions represented by a number of dummy sequences of a given length (L) into an encoded data stream to be compressed, each dummy sequence being composed of a number of identical binary or hexadecimal fill-in values.

A demand paging apparatus and a method for an embedded system are provided. The demand paging apparatus includes a nonvolatile storage device, a physical memory, a demand paging window, and a demand paging manager. The nonvolatile storage device stores code and data which are handled by demand paging. The physical memory processes information about a requested page that is read from the nonvolatile storage device. The demand paging window generates a fault for the page and, thus, causes demand paging to occur. The demand paging window is part of an address space to which an application program stored in the nonvolatile storage device refers. The demand paging manager processes the page fault generated in the demand paging window.

An apparatus for providing storage is provided that includes a jitter buffer element. The jitter buffer element includes a primary jitter buffer storage that includes a primary low water mark and a primary high water mark. The jitter buffer element also includes a secondary jitter buffer storage that includes a secondary low water mark and a secondary high water mark. A first data segment within the primary jitter buffer storage is held for a processor. A playout point may advance from a bottom of the primary jitter buffer storage to the primary low water mark. When the playout point reaches the primary low water mark, the processor communicates a message for the secondary jitter buffer storage to request a second data segment up to the secondary high water mark associated with the secondary jitter buffer storage.

A method and apparatus for reducing a page replacement time in a system using a demand paging technique are provided. The apparatus includes a memory management unit which transmits a signal indicating that a page fault occurs, a device driver which reads a page having the page fault from a nonvolatile memory, and a page fault handler that searches and secures a space for storing the page having the page fault in a memory. The searching and securing of the space in the memory is performed within a limited time calculated beforehand and a part of data to be loaded to the memory of the system is stored in the nonvolatile memory.

Aspects include computing devices, systems, and methods for implementing executing decompression of a compressed page. A computing device may determine a decompression block belonging to a compressed page that contains a code instruction requested in a memory access request. Decompression blocks, other than the decompression block containing the requested code instruction, may be selected for decompression based on their locality with respect to the decompression block containing the requested code instruction. Decompression blocks not identified for decompression may be substituted for a fault or exception code. The computing device may decompress decompression blocks identified for decompression, terminating the decompression of the compressed page upon filling all blocks with decompressed blocks, faults, or exception code. The remaining decompression blocks belonging to the compressed page may be decompressed after or concurrently with the execution of the requested code instruction.

An apparatus and method for handling an interrupt disabled section and page pinning apparatus and method are provided. An apparatus for handling an interrupt disabled section includes: a generating unit which generates a list of interrupt disabled sections, in which demand paging can occur, in order to execute a program; an examining unit which searches the generated list when the program demands to disable an interrupt and examines whether information corresponding to the interrupt disabling demand is included in the list; and a loading unit which reads out a page required to execute the program from an auxiliary storage device when the information corresponding to the interrupt disabling demand is included in the list, and loads the page into a physical memory.

A method and terminal for demand paging at least one of code and data requiring a real-time response is provided. The method includes splitting and compressing at least one of code and data requiring a real-time response to a size of a paging buffer and storing the compressed at least one of code and data in a physical storage medium, if there is a request for demand paging for the at least one of code and data requiring the real-time response, classifying the at least one of code and data requiring the real-time response as an object of Random Access Memory (RAM) paging that pages from the physical storage medium to a paging buffer, and loading the classified at least one of code and data into the paging buffer.

Aspects include computing devices, systems, and methods for implementing executing decompression of a compressed page. A computing device may determine a decompression block belonging to a compressed page that contains a code instruction requested in a memory access request. Decompression blocks, other than the decompression block containing the requested code instruction, may be selected for decompression based on their locality with respect to the decompression block containing the requested code instruction. Decompression blocks not identified for decompression may be substituted for a fault or exception code. The computing device may decompress decompression blocks identified for decompression, terminating the decompression of the compressed page upon filling all blocks with decompressed blocks, faults, or exception code. The remaining decompression blocks belonging to the compressed page may be decompressed after or concurrently with the execution of the requested code instruction.

A paging mode remote conversion system and method of a mobile communication terminal, and the mobile communication terminal therefor are provided to demand paging mode conversion via a user authentication procedure using a cipher, thereby preventing a paging mode from being converted by another person regardless of a subscriber's intention. A paging mode remote conversion system registers an authentication cipher and personal information for including a mobile communication terminal number of a service subscriber(S401,S402). If subscriber authentication for using a service is demanded to the conversion system from a subscriber terminal through an ARS(Automatic Response System) or a wire / wireless Internet, the personal information and the authentication cipher are inputted to conduct the subscriber authentication(S403-S406). If conversion into a particular paging mode is demanded by a subscriber whose authentication is successful, the system sends a call to the subscriber's terminal by using a particular sending number for conversion into the corresponding paging mode(S407-S409). The subscriber's terminal converts into the corresponding paging mode by analyzing the sending number(S410,S411).

The invention discloses a multi-area on-demand paging system and its application method. The system includes at least one paging box, the paging box is equipped with a control box and a plurality of on-demand buttons, an area selection knob, a first dial switch and a microphone, each on-demand button corresponds to a pre-recorded prompt word, and each of the area selection knobs Each stall corresponds to a playing area, and the value of the first dial switch constitutes the identity mark of the paging box, and the control box is connected with the processor for controlling the loudspeaker system in the broadcasting area; the control box is used to transmit the identity signal of the paging box , the corresponding playback area selection signal, the signal containing the corresponding prompt word, and / or, the real-time audio stream is output to the processor, so that the processor controls the broadcast area speaker system to play the prompt word or real-time sound in the corresponding playback area. The invention is used for multi-area on-demand and broadcast control, and easily realizes the function of free switching between on-demand prompt sound and multi-area broadcast.

Provides a mechanism for automatically using huge pages. The OS loader performs aggressive contiguous allocation and then pages out small pages on demand into as contiguous and naturally aligned physical address ranges as possible of the size set for large pages. The operating system detects when huge pages are full and switches mappings to use huge pages. If the operating system is running with a low amount of memory, the operating system can free up parts and degrade gracefully.

One embodiment of the present invention includes techniques to support demand paging across a processing unit. Before a host unit transmits a command to an engine that does not tolerate page faults, the host unit ensures that the virtual memory addresses associated with the command are appropriately mapped to physical memory addresses. In particular, if the virtual memory addresses are not appropriately mapped, then the processing unit performs actions to map the virtual memory address to appropriate locations in physical memory. Further, the processing unit ensures that the access permissions required for successful execution of the command are established. Because the virtual memory address mappings associated with the command are valid when the engine receives the command, the engine does not encounter page faults upon executing the command. Consequently, in contrast to prior-art techniques, the engine supports demand paging regardless of whether the engine is involved in remedying page faults.