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Date: Thu, 17 Jan 2002 14:15:53 -0500
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To: davem@redhat.com
Subject: Re: hires timestamps for netif_rx()
Newsgroups: mail.linux-kernel
In-Reply-To: <20020116.211251.35505694.davem@redhat.com>
In-Reply-To: <Pine.GSO.4.40.0201161827510.28457-100000@apogee.whack.org>
Organization: TMR Associates, Schenectady NY
Cc: linux-kernel@vger.kernel.org
From: davidsen@tmr.com (bill davidsen)
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In article <20020116.211251.35505694.davem@redhat.com> you write:
|    From: Wilson Yeung <wilson@whack.org>
|    Date: Wed, 16 Jan 2002 18:45:02 -0800 (PST)
| 
|    Notice that all the timestamps are the same, which led me to believe that
|    xtime was being gotten directly.
|    
| This is what happens only if your CPU lacks a timestamp counter
| (TSC on x86).  What kind of CPU are you performing this experiment
| on?

In the part of the message you snipped:
> That's interesting, because when I call do_gettimeofday() instead of
> get_fast_time(), I get different kinds of results that imply that these
> are not equivalent.  I'm running the kernel on a PIII.

I would think that was short for "Pentium-III" which should have TSC.
-- 
bill davidsen <davidsen@tmr.com>
  CTO, TMR Associates, Inc
Doing interesting things with little computers since 1979.
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