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    SubjectRe: finding out the value of HZ from userspace
    Arjan van de Ven wrote:
    > On Thu, 2004-03-11 at 15:17, Micha Feigin wrote:
    >
    >>Is it possible to find out what the kernel's notion of HZ is from user
    >>space?
    >>It seem to change from system to system and between 2.4 (100 on i386)
    >>to 2.6 (1000 on i386).
    >
    >
    > if you can see 1000 from userspace that is a bad kernel bug; can you say
    > where you find something in units of 1000 ?

    create_elf_tables() in fs/binfmt_elf.c tells every ELF execve():
    NEW_AUX_ENT(AT_CLKTCK, CLOCKS_PER_SEC);
    which can be found by crawling through the stack above the pointer
    to the last environment variable.

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