Re: hires timestamps for netif_rx()

[Wilson Yeung]

On Wed, 16 Jan 2002, David S. Miller wrote:
>    I'd love to have a run-time tuneable kernel parameter that lets me use
>    do_gettimeofday() instead of get_fast_time for received packet
>    timestamping.  Does this seem reasonable?
>
> Can you demonstrate a difference in accurace between these two
> routines on any architecture :-)

The discreprency is that get_fast_time() returns the current value of
xtime, while do_gettimeofday() may actually calculate the time and
consider both xtime and the jiffies.