摘要:
A communication apparatus is disclosed that includes a transmission circuit configured to transmit transmission data to a communication counterpart; a reception circuit configured to receive reception data from the communication counterpart; a storage device configured as at least two buffers including a transmission buffer that stores the transmission data and a reception buffer that stores the reception data; and an address mapping unit configured to perform address mapping of the buffers including the transmission buffer and the reception buffer on the storage device, and adjust the storage capacity of the transmission buffer and the storage capacity of the reception buffer.
摘要:
An image forming apparatus includes an image input device that reads an image to obtain image data and a printer engine that forms an image on a medium based on image data. A bus of a PCI Express standard is used to transfer data. Storage areas serving as end points of the standard and hardware resources that transmit data and receive image data to and from the storage areas are connected to an identical switch according to the PCI Express standard. Specifically, an input/output area, an image input device, and a printer engine are connected to one switch, and a storage area, a compressor, and a hard disk is connected to another switch.
摘要:
A high-speed serial switch fabric is configured to perform a mapping of a traffic class that is capable of differentiating traffics onto a virtual channel. The high-speed serial switch fabric connects a plurality of devices. A traffic-class setting unit sets, when a conflict occurs between devices connected to the high-speed serial switch fabric, the traffic class for each of traffics in the devices having the conflict. A channel setting unit assigns each of set traffic classes to different virtual channels, and gives a priority of data communication to each of the set traffic classes.
摘要:
A data transferring system based on the PCI Express standard in which power saving is realized is disclosed. In the data transferring system, a data transferring device transfers image data based on the PCI Express standard by synchronizing with a line synchronizing signal LSYNC. At this time, the data transferring device causes a period between packets (image data) to be transferred in one line cycle of the line synchronizing signal LSYNC to be shorter than a transition period “t1” which is required to transit from a link state L0 to a link state L0s and from the link state L0s to the link state L0. With this, the number of the transition periods “t1” is reduced and the period of the link state L0s is made long.
摘要:
An information processor that is connected to at least one other information processor via a network, includes a detecting unit that detects an optional device to be used for information processing, as a target optional device, installed on the other information processor, an issuing unit that issues an access request to use the target optional device to the other information processor, a receiving unit that receives an access permission for access to the target optional device from the other information processor, and a processing unit that performs the information processing with the target optional device.
摘要:
A data transferring system in which detecting a route from an upper position to a lower position on a tree structure is realized by hardware of communication devices and processes for detecting the above are simplified is disclosed. A root complex broadcasts a search message to a lower node on a tree structure. When a port of the node confirms and receives the search message, the port adds its own information, specifically, the device number of the port, to the data payload part of the search message and sends the search message including the information to a node (end point) located at the lowest position on the tree structure. When the end point receives the search message, the end point sends a reply message to the root complex. The device numbers of the ports where the search message passes through are attached to the reply message.
摘要:
An information processing apparatus includes a plurality of data communication devices via a high-speed serial bus with a plurality of traffics in different directions present between the data communication devices. A transfer-rate measuring unit measures a transfer rate of each of the traffics. A parameter adjusting unit adjusts a parameter for a data transfer in each of the traffics in such as manner that the transfer rate of each of the traffics measured by the transfer-rate measuring unit becomes a preset target value.
摘要:
A high-speed serial switch fabric is configured to perform a mapping of a traffic class that is capable of differentiating traffics onto a virtual channel. The high-speed serial switch fabric connects a plurality of devices. A traffic-class setting unit sets, when a conflict occurs between devices connected to the high-speed serial switch fabric, the traffic class for each of traffics in the devices having the conflict. A channel setting unit assigns each of set traffic classes to different virtual channels, and gives a priority of data communication to each of the set traffic classes.
摘要:
An information processing system includes a high-speed serial bus that transmits and receives data independently over communication channels via a tree-structured network including a point-to-point connection, and a control unit that issues a request command based on a request synchronization signal for data with a timing constraint on line synchronous transfer by a line synchronization signal to transmit a plurality of data, including the data with the timing constraint, simultaneously via the high-speed serial bus.
摘要:
An image forming system comprising a serial communication control part, an image input part, an image output part, an image processing part, a storage part, a printer controller, and a high-speed serial bus. The high-speed serial bus mutually couples the serial communication control part and at least one of the image input part, the image output part, the image processing part, the storage part and the printer controller.