Date: Sat, 25 Jun 2011 16:35:43 +0000 (UTC) From: Marcel Moolenaar <marcel@FreeBSD.org> To: cvs-src-old@freebsd.org Subject: cvs commit: src/sys/ia64/ia64 clock.c Message-ID: <201106251636.p5PGa3me038028@repoman.freebsd.org>
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marcel 2011-06-25 16:35:43 UTC
FreeBSD src repository
Modified files:
sys/ia64/ia64 clock.c
Log:
SVN rev 223542 on 2011-06-25 16:35:43Z by marcel
Define the minimum fractional period in terms of hz. We know hz is
a magnitude smaller than itc_freq. A minimum period of 10*hz is
sufficient precision. As a side-effect, the number of clocks per
second, when the machine is idle, dropped by more than 50%.
Be anal and define the maximum period to be at least 4G seconds.
With a 64-bit counter and an ITC frequency that's expected to be
always less than 4Ghz, it takes longer than that to wrap around.
Revision Changes Path
1.42 +2 -2 src/sys/ia64/ia64/clock.c
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