Efficient sampling port buffer management method

Abstract

Disclosed is an efficient sampling port buffer management method. The efficient sampling port buffer management method comprises 1) distributing two buffer zones and a write buffer counter for a sampling port during initialization of the sampling port; 2) during data write-in of a source port, writing data into the buffer zone pointed by a temporary pointer; 3) after data write-in is completed, switching the pointers pointing to the two buffer zones, and meanwhile updating a write buffer counter and adding the number by one in the write buffer counter; 4) during data reading from the source port, firstly, storing the counting value of the write buffer counter, then reading data from the buffer zone pointed by a valid pointer, after reading is completed, comparing the stored counting value with the latest counting value of the write buffer counter to determine whether the counting value of the write buffer counter changes, if so, repeating the step 4) until the counting value of the write buffer counter has no change, and if not, completing the reading; 5) sending and writing messages by calling the sampling port. The efficient sampling port buffer management method can improve the communication efficiency of the sampling port.

Description

technical field [0001] The invention belongs to the technical field of computer software control, and relates to a high-efficiency sampling port buffer management method. Background technique [0002] In order to meet the requirements of modularized and integrated avionics IMA system, a multi-partition operating system has emerged. The salient feature of a multi-partition operating system is that each partition is isolated from each other in space and time. Inter-partition communication is the main way to achieve information exchange between partitions. The sampling port is an important communication method for inter-partition communication. The function of the sampling port It is required to maintain only one message. When the source port writes a message, no matter whether the previously written message is read or not, the new message will overwrite the previous message; the destination port only reads the most recently arrived message. The sampling port needs to support ...

AI Technical Summary

Problems solved by technology

[0005] If new messages are written in the process of reading messages and need to be read again, the performance of the above two methods will be further degraded

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