Huawei Technologies Co., Limited

Kejia Lan

Ying Li

Chenghong He

Yongbo Cheng

Tao He

Donghao Yu

A method for retransmitting data includes a transmitter receiving a retry request, where the retry request includes a sequence number of a first to-be-retransmitted flit. The transmitter reads data in a retry buffer based on the sequence number of the first to-be-retransmitted flit and retransmits the data, where the retry buffer includes flits of at least two types of data packets, and retransmission manners of the at least two types of data packets are different.

Method for retransmitting data and apparatus

A directory maintenance method and apparatus are provided. The method includes sending, by a main memory according to a correspondence between a cache line in a directory and a cache, listening information to each cache corresponding to a cache line at a preset frequency; receiving, by each cache corresponding to the cache line, the listening information, and sending a listening response according to the listening information; and receiving, by the main memory, the listening response, and updating the directory according to the listening response, where the listening response includes a state of the cache line in the cache sending the listening response. The directory maintenance method and apparatus that are disclosed in the present invention can lower an impact of listening caused due to replacement on normal processing of a processor, and reduce degradation of system performance.

Directory maintenance method and apparatus

A method for temporarily storing data and a storage device is provided. The method for temporarily storing data is applied to the storage device, and the storage device includes a source agent and a target agent. The method includes: sending, by the source agent, a data obtaining request to the target agent; receiving, by the source agent, target data that is corresponding to the data obtaining request and is returned by the target agent; determining, by the source agent, whether a snooping request that is for the target data and sent by the target agent is received after the data obtaining request is sent and before the target data is received, where the snooping request indicates that the target agent is simultaneously processing an obtaining request from another source agent for the target data; and if the snooping request is received, discarding, by the source agent, the target data.

Method for temporarily storing data and storage device

A method and an apparatus for processing a system command during memory backup. The method includes: acquiring a write address corresponding to a write operation command; if data corresponding to the write address has been read from a raw memory area but is not written to a backup memory area, mapping the write operation command to the raw memory area, and writing data to the write address in the raw memory area according to the write operation command; and deducting a set value from the write address to obtain an initial address to subsequently read data from the raw memory area. According to the embodiments of the present invention, a problem of system command blocking is solved during a memory backup operation, so that a system command is processed in a timely manner.

Method and apparatus for processing system command during memory backup

A method according to an embodiment of the present disclosure comprising: receiving a read instruction transmitted by a host device, the read instruction including a first address; reading first data together with a first CRC code and a first ECC which are associated with the first data from a memory based on the first address; and performing error detection on the first data based on the first CRC code, and performing error correction on the first data based on the first ECC if an error is detected. With the embodiments of the disclosure, the CRC code with better capability of error detection is adopted to perform error detection on the data. If any error is detected, error correction is performed using the ECC. Thus, it is possible to overcome the problem as to insufficient capability of error detection of the ECC in the prior art, thereby improving the system performance.

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Chengdu, China

Kejia Lan