Supported HZ(Timer Frequency) for imx6 dl

[ramanareddy]

Hi there,

What are the supported Timer Frequency(HZ) values for i.MX6dl.

In the kernel config of 3.18.29 I see the values 100, 200 upto 1000.

But are these supported by i.MX6dl ?

By default it is set to 100HZ.

If I change this to 200 0r 500 what are the negative consequences I will face?

I am facing issues with the select system call timeout to 25ms at 100HZ.

[igorpadykov · Accepted solution]

Hi Ramana

i.MX6 hardware supports all these frequencies. However in linux

there are many processes/applications which should be serviced by processor.

Each timer interrupt routine consumes processor time, so interrupting frequently

will left less time to other processes. So this is operating system problem and I am not

sure that all other frequencies were tested.

Best regards
igor
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[ramanareddy]

Thank you Igor