A Method for Detecting Bus Delay

Abstract

The invention discloses a bus delay detection method and belongs to the technical field of data transmission buses. The method comprises a writing delay detection process and a reading delay detection process. The writing delay detection process comprises the steps of A1, detecting a writing address signal and a writing response signal, and performing processing to obtain a writing delay value; A2, detecting a writing burst signal, and performing processing to obtain a writing throughput rate count value; and A3, performing calculation according to a writing delay judgment value and the writing throughput rate count value to obtain a writing delay value of each byte, outputting the writing delay value of each byte, and exiting from the process. The reading delay detection process comprises the steps of B1, detecting a reading address signal and a reading data signal, and performing processing to obtain a reading delay value; B2, detecting a reading burst signal, and performing processing to obtain a reading throughput rate count value; and B3, performing calculation according to a reading delay judgment value and the reading throughput rate count value to obtain a reading delay value of each byte, outputting the reading delay value of each byte, and exiting from the process. The technical scheme has the beneficial effects that the calculation process of delay detection is simplified and the calculation amount of delay detection is reduced.

Description

technical field [0001] The invention relates to the field of data transmission bus technology, in particular to a method for detecting time delay. Background technique [0002] The existing evolved on-chip bus (Advanced Microcontroller Bus Architecture, AMBA) transmission protocol is a data transmission protocol that can be applied to a system on chip (System on Chip, SoC), and the current latest version of the protocol is AMBA 3.0. [0003] In the AMBA transmission protocol, the most important component is an evolved extensible interface (Advanced Extensible Interface, AXI) bus. Two important indicators to measure the transmission performance of the AXI bus are latency (Latency) and bandwidth (Bandwidth). In the prior art, for a general bus, a bus monitor (Bus Monitor) is usually placed on the bus, and the delay and bandwidth of the bus are obtained through real-time monitoring, so as to achieve the purpose of measuring bus performance. However, since the AXI bus supports...

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Problems solved by technology

[0004] According to the problems existing in the prior art, a technical scheme of a method for detecting bus delay is now provided, aiming to solve the problems in the prior art that the detection delay of the AXI bus is troublesome and the calculation process is relatively complicated

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