On Tue, Jun 13, 2000 at 12:28:42PM +0000, Peter Rival wrote:
>
> But then again, Tru64 has probably in the area of an order of
> magnitude (at least) more locks than Linux does, so one lock hogging
> that much time is a much clearer sign than the more coarse
> granularity of Linux.
Bingo...
> So what am I saying? Yes, it is a bad thing from a perf
> perspective, and only gets worse as the systems get bigger and
> faster. That's why I try to keep on top of the lockmeter code for
> Alpha (can be gotten from SGI, works now with a small patch from me
> until John integrates it) - so we can make sure we always know what
> is going on whenever possible. (Not helpful in this case, as it's
> at boot time, but other than that...)
That's important - that you see them primarily during boot, rather
than often during normal operation. That's indicative of boot tasks
that simply take a long time and happen to need to hold a lock during
that time. I'd be much more concerned if these happened frequently
during normal operation.
--Jay++
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Jay A Estabrook Alpha Engineering - LINUX Project
Compaq Computer Corp. - MRO1-2/K20 (508) 467-2080
200 Forest Street, Marlboro MA 01752 Jay.Estabrook@compaq.com
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