3 results about "Sequential consistency" patented technology

The application discloses a cross-clock domain register synchronization method and device. It relates to the technical field of digital integrated circuit design. The method comprises the following steps: when the target clock domain is unavailable, routing the bus read-write request to a shadow register array driven by a system clock, and writing a write transaction log into a log queue when the write transaction is completed, the write transaction log comprising a target address, write data and byte enable; when the target clock domain changes from unavailable to available and the log queue is not empty, setting the handshake signal of the bus interface to invalid, reading the write transaction log from the log queue according to the write sequence, and writing the write data into the target register through a byte mask circuit according to the target address in the write transaction log; when the target clock domain is available and the log queue is empty, routing the bus read-write request to the target register, and setting the handshake signal of the bus interface to valid. The method realizes register access integrity and sequential consistency in the target clock dynamic change scenario.

The application provides a time synchronization method of a tree type FC network, comprising the following steps: establishing a tree type FC network; each boundary clock device realizes time synchronization with a master clock source through a time synchronization strategy; each slave clock device connected to the same boundary clock device realizes time synchronization with the connected boundary clock device through the time synchronization strategy. Through the delay measurement of FC over PON and the time synchronization primitive exchange mode, all FC storage nodes can keep nanosecond-level time synchronization, and through the carry chain fine time synchronization, the synchronization accuracy of the FC storage nodes can be improved to picosecond level, so that the data write sequence consistency in the distributed storage can be ensured, and the data conflict caused by the time inconsistency can be avoided.