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Diffstat (limited to 'html/hints/sun4')
| -rw-r--r-- | html/hints/sun4 | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/html/hints/sun4 b/html/hints/sun4 new file mode 100644 index 0000000..424fa18 --- /dev/null +++ b/html/hints/sun4 @@ -0,0 +1,15 @@ +Notes on CPU clock oscillator tolerance with SunOS 4.1.1 and 4.1.3 + +A bug in SunOS 4.1.1 results in the kernel time losing 1 microsecond +per tick of the system clock. The bug was fixed (bugid 1094383) for +SunOS 4.1.1 and corrected in SunOS 4.1.3. The easiest way to fix this +is to replace the 4.1.1 binary clock.o with the corresponding 4.1.3 +binary. Without this change it is necessary to use the tickadj program +included in this distribution with the -t 9999 option. + +The tickadj option will work in all cases except when the kernel has +been modified to correct the CPU clock oscillator frequency using a +1-pps signal from a precision source. The bugfix must be installed for +this wrinkle to work properly. + +Dave Mills (mills@udel.edu) |