From: davidsen@tmr.com (bill davidsen)
To: davem@redhat.com
Cc: linux-kernel@vger.kernel.org
Subject: Re: hires timestamps for netif_rx()
Date: Thu, 17 Jan 2002 14:15:53 -0500 [thread overview]
Message-ID: <200201171915.OAA02742@gatekeeper.tmr.com> (raw)
In-Reply-To: <20020116.211251.35505694.davem@redhat.com>
In-Reply-To: <Pine.GSO.4.40.0201161827510.28457-100000@apogee.whack.org>
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.
next prev parent reply other threads:[~2002-01-17 19:16 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-01-16 19:56 CML2-2.1.4 is available Eric S. Raymond
2002-01-16 22:50 ` Ross Vandegrift
2002-01-16 22:43 ` Eric S. Raymond
2002-01-16 23:00 ` Ross Vandegrift
2002-01-16 23:01 ` Eric S. Raymond
2002-01-17 1:02 ` Ross Vandegrift
2002-01-17 1:51 ` [kbuild-devel] " Eric S. Raymond
2002-01-17 4:32 ` Eric S. Raymond
2002-01-16 23:33 ` hires timestamps for netif_rx() Wilson Yeung
2002-01-17 0:17 ` David S. Miller
2002-01-17 1:03 ` Wilson Yeung
2002-01-17 1:08 ` David S. Miller
2002-01-17 2:45 ` Wilson Yeung
2002-01-17 5:12 ` David S. Miller
2002-01-17 5:48 ` CM8338 hissing sound with linux kernel 2.4.6 to 2.4.17 vernie
2002-01-17 20:54 ` Thomas Cataldo
2002-01-17 19:15 ` bill davidsen [this message]
2002-01-17 1:23 ` hires timestamps for netif_rx() Andi Kleen
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