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SubjectHow to know HZ from userspace?

Is there any way to read out the compile-time HZ value of the kernel?

I had a brief look at /proc/* and didn't find anything.

The background, why it is needed:

There are certain settings, for example the icmp rate limiting values,
which can be set using sysctl. Those setting are basically derived from
HZ values (1*HZ, for example).

If you now want to set those values from a userspace program / script in
a portable manner, you need to be able to find out of HZ of the currently
running kernel.

Live long and prosper
- Harald Welte /
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