Re: hires timestamps for netif_rx()

From: Wilson Yeung (
Date: Wed Jan 16 2002 - 20:03:58 EST

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.

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