1checktsc is a user space program that checks TSC synchronization 2between pairs of CPUs on an SMP system using a technique borrowed 3from the Linux 2.6.18 kernel. 4 5The test passes if all TSCs are within +/- "threshold" clock cycles 6of each other. The default value of "threshold" is 500 clock cycles 7and can be changed using the --threshold option. 8 9Default behaviour is to check all of the CPUs on a system and to 10report the observed difference in TSC values between each pair of CPUs. 11The --cpus option can be used to specify a subset of the CPUs to test. 12 13When run with the --silent option the test produces no output (other 14than for catastrophic errors) and success or failure is indicated by 15a 0 or 1 exit status from the program. 16 17Author: md@google.com 18License: GPL 19 20