1 1.1.1.1.28.2 msaitoh Notes on CPU clock oscillator tolerance with SunOS 4.1.1 and 4.1.3 2 1.1.1.1.28.2 msaitoh 3 1.1.1.1.28.2 msaitoh A bug in SunOS 4.1.1 results in the kernel time losing 1 microsecond 4 1.1.1.1.28.2 msaitoh per tick of the system clock. The bug was fixed (bugid 1094383) for 5 1.1.1.1.28.2 msaitoh SunOS 4.1.1 and corrected in SunOS 4.1.3. The easiest way to fix this 6 1.1.1.1.28.2 msaitoh is to replace the 4.1.1 binary clock.o with the corresponding 4.1.3 7 1.1.1.1.28.2 msaitoh binary. Without this change it is necessary to use the tickadj program 8 1.1.1.1.28.2 msaitoh included in this distribution with the -t 9999 option. 9 1.1.1.1.28.2 msaitoh 10 1.1.1.1.28.2 msaitoh The tickadj option will work in all cases except when the kernel has 11 1.1.1.1.28.2 msaitoh been modified to correct the CPU clock oscillator frequency using a 12 1.1.1.1.28.2 msaitoh 1-pps signal from a precision source. The bugfix must be installed for 13 1.1.1.1.28.2 msaitoh this wrinkle to work properly. 14 1.1.1.1.28.2 msaitoh 15 1.1.1.1.28.2 msaitoh Dave Mills (mills (a] udel.edu) 16