There is a proper way to do this and hackish way. The proper way is to eventually provide some interface via the work BenH has been doing with vDSO (while out). The hackish way is to export it via some /proc or sysfs attribute. The hackish way will not make its way into a mainline tree.
- kumar On Mar 7, 2005, at 5:02 AM, Bj?rn ?stby wrote: > I'm currently using ELDK 3.0 (kernel 2.4.25) and a mpc823e trying to > do some latency measurements for my final thesis project. > > I'm wondering if there is any possibility to read the Timer Counter > Register (TCN1) in user space. I have initially used gettimeofday(), > which provides sufficient resolution (usec), but I suppose that > solution probably adds on some kind of unknown context-switch latency. > Does anyone have a clue on how to access this in user space? Could > inline assembler or perhaps mmap() do the trick (I'm using C as > programming language)?. > > > > Regards, > Bjorn > > > > <ATT07173.txt>
