Interrupt delay counting system and method based on FPGA

Abstract

According to the FPGA-based interrupt delay counting system and a method provided by the invention, the interrupt delay counter can accurately calculate the interrupt processing duration of the host from peripheral interrupt triggering to interrupt service program processing completion of the host. A calculation result does not need to inform the corresponding interrupt module through a host, andthe interrupt module can directly obtain the corresponding duration from the delay counter.

Description

technical field [0001] The present invention relates to the field of computer technology, in particular to an FPGA-based interruption delay counting system and method. Background technique [0002] With the increasingly widespread application of heterogeneous acceleration, FPGA-based accelerator cards are also developing rapidly. The accelerator card FPGA is connected to the server host through the PCIE interface, and the server host sends the data to be accelerated to the accelerator card FPGA through the PCIE interface, and the accelerator card FPGA returns relevant data through the PCIE interface after processing. [0003] Throughout the system, there are many peripherals that need to send interrupts to the host, and the host executes the interrupt service routine to handle the interrupts. The interrupts of some devices are delay-sensitive. In some specific applications, it is necessary to know the length of time the host processes the interrupts, which requires calculat...

AI Technical Summary

Problems solved by technology

In terms of hardware logic, there is no general approach

[0005] However, the results calculated by software are not as accurate as those obtained by hardware logic calculations, and the module that sends the interrupt cannot directly know the length of time the host processes the interrupt. The host needs to inform the module of the calculated result by writing the register, and the configuration register is also takes time, which in turn leads to new delays

Images