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timesync: reduce the frequency tolerance from half to double the system clock

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the frequency tolerance used by timesync was from a 10th to 10 times
the frequency of the system clock! switching a system from tsc to pic
timer changes the system clock frequency from 300MHz to arround 1.8Ghz
on a x200s laptop resulting in time running way too slow or way too fast.

so we change timesync to only accept frequencies from half to double the
system clock which still seems huge, but at least catches the case above
resulting in timesync ignoring the old frequency file.
This commit is contained in:
cinap_lenrek 2013-06-25 20:28:51 +02:00
parent 5165864dbb
commit c01833286b
1 changed files with 2 additions and 2 deletions
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4
sys/src/cmd/aux/timesync.c
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@ -288,8 +288,8 @@ main(int argc, char **argv)
/* figure out our time interface and initial frequency */
inittime();
gettime(0, 0, &hz);
minhz = hz/10;
maxhz = hz*10;
minhz = hz / 2;
maxhz = hz * 2;
myprec = getclockprecision(hz);
/* convert the accuracy from nanoseconds to ticks */