1 1.1 kardel Notes on CPU clock oscillator tolerance with SunOS 4.1.1 and 4.1.3 2 1.1 kardel 3 1.1 kardel A bug in SunOS 4.1.1 results in the kernel time losing 1 microsecond 4 1.1 kardel per tick of the system clock. The bug was fixed (bugid 1094383) for 5 1.1 kardel SunOS 4.1.1 and corrected in SunOS 4.1.3. The easiest way to fix this 6 1.1 kardel is to replace the 4.1.1 binary clock.o with the corresponding 4.1.3 7 1.1 kardel binary. Without this change it is necessary to use the tickadj program 8 1.1 kardel included in this distribution with the -t 9999 option. 9 1.1 kardel 10 1.1 kardel The tickadj option will work in all cases except when the kernel has 11 1.1 kardel been modified to correct the CPU clock oscillator frequency using a 12 1.1 kardel 1-pps signal from a precision source. The bugfix must be installed for 13 1.1 kardel this wrinkle to work properly. 14 1.1 kardel 15 1.1 kardel Dave Mills (mills (a] udel.edu) 16