measurement

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Hello,

I use PSCHED_GET_TIME(stamp) to measure the
delay of some kernel function.

function_name( ) {
int psched_clock_scale;
psched_time_t stamp1, stamp2;
psched_tdiff_t delay;

PSCHED_GET_TIME(stamp1);
PSCHED_GET_TIME(stamp2);
delay=PSCHED_TDIFF(stamp2, stamp1);
printk(KERN_INFO "[%ld], [%ld], [%ld]\n", stamp1, stamp2, delay);
}

But the result like this [135967], [0], [135967].
I really don't know why stamp2 is 0, and
I can't find out the scale of stamp1/stamp2.
(micro-second ?? )

Thanks.
Cheers,
Steven

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