Method and system for measuring interruption duration of embedded system at high precision and medium

Abstract

The invention discloses a method for measuring interruption duration of an embedded system with high precision, and relates to the technical field of computers. Comprising the following steps: S1, specifying an interrupt exception type corresponding to an exception vector number; s2, when the interrupt exception occurs, the system jumps to a general exception entry function of the system; s3, the general exception entry function judges exception types through exception type numerical values; s4, calling an interrupt vector processing macro function in the interrupt entry function; s5, at the inlet of the interrupt vector processing macro function, firstly executing the interrupt duration measurement starting macro function to obtain an input interrupt timestamp, then calling and executing the interrupt processing function to obtain an output interrupt timestamp, and finally executing the interrupt duration measurement ending timing and data statistics function macro function at the outlet of the interrupt vector processing macro function; and S6, after the interrupt processing is completed, returning to a system state. According to the non-invasive performance analysis method, hardware resources can be fully utilized and the debugging efficiency can be improved on the premise of not modifying a program function flow.

Description

technical field [0001] The invention relates to the field of computer technology, in particular to a method, system and medium for measuring the interrupt duration of an embedded system with high precision. Background technique [0002] Interruption is a very important concept in computer systems, and modern computers all use the interrupt mechanism without exception. In the process of computer executing the program, due to a special situation (or called "event"), the CPU stops the current program and turns to execute the event processing program (commonly known as interrupt processing or interrupt service program). After the program is executed, return to the breakpoint and continue to execute the original program. This process is called interruption. [0003] Interrupt latency (interrupt duration) is one of the most important performance indicators of a real-time operating system. It usually refers to the time elapsed from when an external device sends an interrupt reques...

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Problems solved by technology

[0005] However, the above two measurement methods are intrusive performance analysis methods. When using them, the program function flow needs to be modified, which is inconvenient to operate

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