Messages in this thread | | | Date | Mon, 15 Jul 2002 11:50:58 -0700 (PDT) | From | Linus Torvalds <> | Subject | Re: HZ, preferably as small as possible |
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On Mon, 15 Jul 2002, Albert D. Cahalan wrote: > > It's not a different value in libproc. There's autodetection. > I can't just support "the majority of ARM", and people keep > giving me shit about HZ supposedly being a per-arch constant. > (not that there's a sane way to get a per-arch constant from > user code anyway)
But that's just _wrong_.
There _is_ a sane way to get the per-arch constant, and there has been for a long long time.
The kernel exports it with the AT_CLKTCK ELF auxiliary note to every ELF binary ever loaded, and I think glibc in turn exports that value through the regular sysconf(_SC_CLK_TCK) thing. (Yeah, I disagree with some of the glibc sysconf implementation, but it sure should be there, and it's documented).
If that doesn't work, then it's a glibc bug (well, in theory there could be a kernel bug too, but since it's a one-liner in the kernel I really doubt it).
Linus
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