摘要:
Embodiments of the present invention provide a memory access method, a switch, and a multiprocessor system. The memory access method includes: receiving, by the switch, a data packet; matching a flow table on the data packet, where the flow table includes at least one flow entry, where the flow entry includes a matching field and an action field, and the at least one flow entry includes a first flow entry, where a matching field of the first flow entry is used to match source node information, destination node information, and a protocol type in the data packet, and an action field of the first flow entry is used to indicate an operation command for a storage device embedded in the switch; and when the data packet successfully matches the first flow entry, performing an operation on the storage device according to the operation command in the action field of the successfully matched first flow entry. In the present invention, a processor in a multiprocessor system accesses a storage device embedded in a switch, so as to reduce and even eliminate a possibility that the processor accesses a remote memory, and reduce a memory access delay.
摘要:
A cabinet server and a data center based on the cabinet server are disclosed. The cabinet server includes at least two function nodes, multiple intra-cabinet antennas, and multiple inter-cabinet antennas. The function nodes are vertically arranged, to form a server core; and the intra-cabinet antennas are vertically arranged, disposed at a side of the server core, and electrically connected to corresponding function nodes, and adjacent intra-cabinet antennas are wirelessly connected. When a radio signal is transmitted within the cabinet server, a transmission path is formed of the vertically arranged intra-cabinet antennas. Because the intra-cabinet antennas are disposed at the side of the server core, electromagnetic radiation generated by the radio signal in a transmission process has a relatively small effect on the function nodes, thereby reducing the effect of the electromagnetic radiation on various electronic devices in the function nodes, improving service lives of the electronic devices, and improving transmission quality of the radio signal.
摘要:
An optical fiber status detection method is used to resolve prior-art problems of relatively high costs and complex assembly caused by separately integrating an OTDR unit. The method includes: alternately sending, by a first station, an optical time domain reflectometer OTDR pulse and optical supervisory channel OSC data to a second station on a same channel, where the second station is a neighboring station of the first station; and receiving, by the first station, reflection light returned by the OTDR pulse by using an optical fiber between the first station and the second station, and obtaining an OTDR probe value according to the reflection light.
摘要:
A DRAM refresh method, apparatus, and system are provided. A to-be-refreshed area in a refresh block is specified in a refresh instruction, so as to refresh a specified location of a DRAM storage array. The method includes: receiving, by a DRAM refresh apparatus, a refresh instruction from a memory controller, where the refresh instruction includes an identifier of a to-be-refreshed block and refresh information used to indicate a to-be-refreshed area, and the refresh instruction is used to instruct the DRAM refresh apparatus to refresh the to-be-refreshed area in the to-be-refreshed block (S902); generating, by the DRAM refresh apparatus, addresses of to-be-refreshed bank rows in the to-be-refreshed block according to the identifier and the refresh information (S904); and refreshing, by the DRAM refresh apparatus, locations corresponding to the addresses of the bank rows in the to-be-refreshed block (S906). In this way, a DRAM refresh time is shortened, refresh power consumption is reduced, a refresh operation is more flexible, and system resource consumption is reduced while data integrity is ensured.
摘要:
A circuit and an array circuit for implementing a shift operation are provided. The circuit for implementing a shift operation includes a resistive random-access memory and four switches, where a first switch is closed when a first end of the first switch is at a low level, a fourth switch is closed when a first end of the fourth switch is at a low level, a second switch is closed when a first end of the second switch is at a high level, and a third switch is closed when a first end of the third switch is at a high level; a second end of the first switch and a second end of the third switch are connected to a negative input end of the resistive random-access memory; a second end of the second switch and a second end of the fourth switch are connected to a positive input end of the resistive random-access memory; the first end of the first switch, the first end of the second switch, the first end of the third switch, and the first end of the fourth switch are connected to an output end of a previous-stage circuit for implementing a shift operation; a third end of the first switch and a third end of the second switch are connected to a bias voltage end; and a third end of the third switch and a third end of the fourth switch are connected to a ground end. The shift circuit has a simple structure and can improve computational efficiency.
摘要:
A data verification method and apparatus, a device, and a storage medium are provided, and belong to the field of data storage technologies. The verification method includes: During data verification, first verification information is obtained, according to a target algorithm, based on verification information of data, second verification information is obtained, according to the target algorithm, based on a target verification set determined based on a first verification set and a second verification set, and finally the first verification information is compared with the second verification information, to obtain a verification result. The verification method can support a plurality of types of data operations, and improve a degree of parallel data processing while ensuring security and accuracy of data verification, thereby improving data processing efficiency.
摘要:
Embodiments of the present invention disclose a method for measuring a dispersion coefficient of an optical fiber, to improve measurement efficiency and reduce measurement costs. The method in the embodiments of the present invention includes: sending, by a network device, a first optical supervisory channel OSC measurement signal and a second OSC measurement signal, where wavelengths of the first OSC measurement signal and the second OSC measurement signal are different; receiving, by the network device, the returned first OSC measurement signal and second OSC measurement signal, where the first OSC measurement signal and the second OSC measurement signal are transmitted through a first optical fiber and a second optical fiber to return to the network device, and the first optical fiber and the second optical fiber are a to-be-tested optical fiber; determining, by the network device, a delay difference between the received first OSC measurement signal and second OSC measurement signal; and determining, by the network device, a dispersion coefficient of the to-be-tested optical fiber based on the delay difference. The embodiments of the present invention further provide a network device. The embodiments of the present invention can improve measurement efficiency, reduce labor use and optical fiber loss, and reduce measurement costs.
摘要:
Embodiments of the present invention provide a memory access method, a switch, and a multiprocessor system. The memory access method includes: receiving, by the switch, a data packet; matching a flow table on the data packet, where the flow table includes at least one flow entry, where the flow entry includes a matching field and an action field, and the at least one flow entry includes a first flow entry, where a matching field of the first flow entry is used to match source node information, destination node information, and a protocol type in the data packet, and an action field of the first flow entry is used to indicate an operation command for a storage device embedded in the switch; and when the data packet successfully matches the first flow entry, performing an operation on the storage device according to the operation command in the action field of the successfully matched first flow entry. In the present invention, a processor in a multiprocessor system accesses a storage device embedded in a switch, so as to reduce and even eliminate a possibility that the processor accesses a remote memory, and reduce a memory access delay.