How can I know whether the timer of the Linux is correct or not?

[ZhouY.external@infineon.com]

Hello everyone,
  I am using a pre-compiled Linux kernel(2.4.18) to boot my MIPS 4Kc Malta
Board. Since I want to measure the performance of my applications, I decided
to use the syscall 'clock_gettime' to get the time data, but how can I
determine whether these time results fits my board's frequency or not, i.e.
are these results true?
  Anybody knows that?
  Thanks in advance!

  Best regards,

  Yidan Zhou