Test method for CPU timer accuracy

Abstract

The invention discloses a method for testing the accuracy of a CPU timer. The method comprises the following steps; step one, taking the timing of an accurate timing instrument as a reference benchmark and conducting a plurality times of measuring with different time ranges to the fist tested timer in the CPU; and step two, when the tested timer in the step one has an accurate timing, taking the timing of the fist tested timer as a benchmark and testing the accuracy of the rest timers in the CPU. The method does not need the help of special instruments, and can be tested at any time when the system is electrified; and the test process does not influence the operation of the system.

Description

technical field [0001] The invention relates to the test of a CPU timer, in particular to a method for the accuracy of the CPU timer. Background technique [0002] The application of the CPU timer is very extensive, and its role is also very critical. In some systems, a timer (TIMER) is used as the clock of the operating system, and several other timers are used as auxiliary clocks to jointly complete the timing tools required by the operating system and other functions. An error in software or hardware design may result in inaccurate timing of the timer, resulting in the failure of the system to operate normally. Various problems caused by inaccurate timing of the timer are hidden, and it is difficult to solve these problems, so the test of its accuracy is extremely important. [0003] At present, there are few testing methods for the accuracy of the timer. Basically, an instrument is used to test the clock signal of the hardware, so as to achieve the purpose of indirectl...

AI Technical Summary

Problems solved by technology

However, in some cases, even if the hardware clock signal test is normal, the accuracy of the CPU timer cannot be guaranteed

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