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Date:      09 Jan 2001 12:49:39 +0100
From:      Dag-Erling Smorgrav <des@ofug.org>
To:        Poul-Henning Kamp <phk@critter.freebsd.dk>
Cc:        current@FreeBSD.ORG
Subject:   Re: bogus microuptime() warnings?
Message-ID:  <xzp1yudgd2k.fsf@flood.ping.uio.no>
In-Reply-To: Poul-Henning Kamp's message of "Tue, 09 Jan 2001 12:14:35 %2B0100"
References:  <15658.979038875@critter>

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Poul-Henning Kamp <phk@critter.freebsd.dk> writes:
> No, this is either a problem reading the i8254 timecounter reliably
> or an interrupt latency problem.

Given that this is -CURRENT, interrupt latency is a likely
explanation...

Going off on a tangent, I'm getting a lot fewer "hwptr went backwards"
with the latest -CURRENT than I used to...

> If you sysctl's indicate that you are running on the TSC timecounter
> and you can reproduce this there is some chance we can create a workaround.

I'll check.

DES
-- 
Dag-Erling Smorgrav - des@ofug.org


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