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Date: Wed, 16 Jan 2002 17:03:58 -0800 (PST)
From: Wilson Yeung <wilson@whack.org>
To: "David S. Miller" <davem@redhat.com>
cc: linux-kernel@vger.kernel.org, <linux-net@vger.kernel.org>
Subject: Re: hires timestamps for netif_rx()
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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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