IO delay time statistical method, system and device and storage medium

The invention provides an IO delay time statistical method, system and device and a storage medium, and the method comprises the steps: after monitoring that a user layer IO is issued, inserting a plurality of time detection points in the execution process of an IO request, obtaining key action triggering time of a memory data page dirty stage, a block input/output request generation stage, an input/output scheduling stage, a driving processing stage, a hardware processing stage and an input/output completion stage in the execution process of the IO request; calculating time consumption of each stage according to the key action triggering time; and calculating the execution process delay time of the IO request according to the consumed time of each stage. According to the method, statistics of IO time consumption of each important stage is realized, tracking of finer granularity of an IO link can be completed, and the specific position of IO delay occurrence can be positioned according to the IO time consumpt