摘要:
A pointer comparing unit determines whether a value of a writing pointer is identical to a value of a reading pointer. When it is determined that the value of the writing pointer is different from the value of the reading pointer, an inter-memory transfer unit reads data stored in a location where a data transfer apparatus reads transmission data from a transmission ring buffer, transfers the data to a reception memory, and writes the data in a location designated by the reading pointer of a reception ring buffer. When the inter-memory transfer unit completes writing of the data in the reception ring buffer, a reading-pointer updating unit updates the reading pointer.
摘要:
A pointer comparing unit determines whether a value of a writing pointer is identical to a value of a reading pointer. When it is determined that the value of the writing pointer is different from the value of the reading pointer, an inter-memory transfer unit reads data stored in a location where a data transfer apparatus reads transmission data from a transmission ring buffer, transfers the data to a reception memory, and writes the data in a location designated by the reading pointer of a reception ring buffer. When the inter-memory transfer unit completes writing of the data in the reception ring buffer, a reading-pointer updating unit updates the reading pointer.
摘要:
According to an aspect of an embodiment, a data transfer device comprises a plurality of transfer circuits managed by a processor, a request accepting unit, a status information collecting unit and a notification data generating unit. The plurality of transfer circuits each controls transfer of data. The request accepting unit accepts a transfer request from at least one of the plurality of transfer circuits. The status information collecting unit collects status information indicating status of data transfer relating to all of the plurality of transfer circuits, upon acceptance of the transfer request. The notification data generating unit generates notification data including information of the transfer circuit regarding which the request accepting unit has received the transfer request and status information collected by the status information collecting unit. And the notification data generating unit transmits the generated notification data to the processor.
摘要:
According to an aspect of an embodiment, a data transfer device comprises a plurality of transfer circuits managed by a processor, a request accepting unit, a status information collecting unit and a notification data generating unit. The plurality of transfer circuits each controls transfer of data. The request accepting unit accepts a transfer request from at least one of the plurality of transfer circuits. The status information collecting unit collects status information indicating status of data transfer relating to all of the plurality of transfer circuits, upon acceptance of the transfer request. The notification data generating unit generates notification data including information of the transfer circuit regarding which the request accepting unit has received the transfer request and status information collected by the status information collecting unit. And the notification data generating unit transmits the generated notification data to the processor.
摘要:
A data relay device relays a read request from a source device to a destination device and relays data corresponding to the read request from the destination device to the source device. The data relay device monitors elapsed time from a time point at which a read request is relayed to the destination device. When the elapsed time reaches warning time or error time, the data relay device sends a warning message or an error message to the source device.
摘要:
A data relay device relays a read request from a source device to a destination device and relays data corresponding to the read request from the destination device to the source device. The data relay device monitors elapsed time from a time point at which a read request is relayed to the destination device. When the elapsed time reaches warning time or error time, the data relay device sends a warning message or an error message to the source device.
摘要:
A method of writing data includes receiving a record of a variable-length data format, creating a field-checking code for each field of the record received, creating a block-checking code in units of the fixed-length data for the data received, and writing data by reading the record, assembling fixed length data that includes the field-checking code and the block-checking code by using the field-checking code and the block-checking code, and transferring the data to a cache memory.
摘要:
A data transferring apparatus receives comparison data to be compared with stored data from an external unit, searches data corresponding to the comparison data from among the stored data, and transfers the data searched to the external unit. A control unit generates comparison-condition information for searching predetermined stored data from a data storing memory. A comparison-data storing unit stores the comparison data received. A comparison-condition storing unit stores the comparison-condition information generated, upon the comparison-data storing unit storing the comparison data. A transfer processing unit transfers the stored data searched to the external unit.
摘要:
In a data relay device, it is judged whether a destination address of data received from an adapter matches with an address specified for an interruption process. Only data that is judged appropriate is sent to a controller.
摘要:
A data transfer apparatus receives comparison data to be compared with stored data from an external unit, searches data corresponding to the comparison data from among the stored data, and transfers the searched data to the external unit. A control unit generates comparison-condition information for searching predetermined stored data from a data storing memory. A comparison-data storing unit stores the received comparison data. A comparison-condition storing unit stores the generated comparison-condition information. A transfer processing unit transfers the searched stored-data to the external unit.