i.MX Processors中的主题 Re: How does IMX6D bind IRQ to a specified CPU core?

How does IMX6D bind IRQ to a specified CPU core?

864535720 — Fri, 30 Aug 2019 01:18:10 GMT

Hello everyone,

my development board is IMX6Q-sabresd. My Linux kernel version is 3.14.52.
When I use an external interrupt, I use the GPIO6_IO01 pin. I found that the CPU occasionally failed to respond to my external interrupts in time. Later I found out that most of the responses to the interrupts were CPU0. I want to bind my external interrupt to CPU1.
I use the command: echo 2 > proc/irq/321/smp_affinity
Hint: -sh: echo: write error: Input/output error

Later I tried to bind other interrupts to CPU1, which reduced the load on CPU0 and solved my problem. Now what I want to ask is: How do I bind my external interrupt to CPU1?
Looking forward to your reply.

Re: How does IMX6D bind IRQ to a specified CPU core?

igorpadykov — Fri, 30 Aug 2019 02:12:51 GMT

Hi 其东刘

one can look at

Enable and Distribute IRQs in Linux - Stack Overflow

Best regards
igor
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Re: How does IMX6D bind IRQ to a specified CPU core?

864535720 — Fri, 30 Aug 2019 04:00:29 GMT

I refer to the URL you gave to make changes. Found that it can't be bound. Hint: -sh: echo: write error: Input/output error