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How does IMX6 improve the response speed of external interrupts?

Question asked by 其东 刘 on Sep 2, 2019
Latest reply on Sep 2, 2019 by igorpadykov

Hello everyone,

    my development board is IMX6Q-sabresd. My Linux kernel version is 3.14.52。

   I use pin 1-4 of GPIO6 as my external interrupt, and each interrupt pin 1S generates about 1440 interrupts. When my four external interrupts work at the same time, the kernel will not respond in time. For example, my external interrupt is generated 500 times, and the kernel may only respond 498 times. The operation that I interrupted is the function in 8250_core.c: serial8250_default_handle_irq
Is there any good way to solve the problem I am having now?