2.4.0test12: problems timing events

Hi, I tried to time events inside the kernel in 2.4.0test12: Basically the same code works fine in 2.2.18 with about 1us jitter. However in 2.4.0test12 the jitter is around 600ms! What I did is this: I modified the interrupt routine of the serial driver to get a precision time-stamp via

2.4.0test12: problems timing events

Hi, I tried to time events inside the kernel in 2.4.0test12: Basically the same code works fine in 2.2.18 with about 1us jitter. However in 2.4.0test12 the jitter is around 600ms! What I did is this: I modified the interrupt routine of the serial driver to get a precision time-stamp via