From owner-freebsd-hackers  Tue Feb  5 10:26:24 2002
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Date: Tue, 5 Feb 2002 10:26:13 -0800 (PST)
Message-Id: <200202051826.g15IQDt04095@vashon.polstra.com>
To: hackers@freebsd.org
From: John Polstra <jdp@polstra.com>
Cc: phk@critter.freebsd.dk
Subject: Re: A question about timecounters 
In-Reply-To: <90498.1012930272@critter.freebsd.dk>
References: <90498.1012930272@critter.freebsd.dk>
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In article <90498.1012930272@critter.freebsd.dk>,
Poul-Henning Kamp  <phk@critter.freebsd.dk> wrote:
> In message <200202051723.g15HNH603801@vashon.polstra.com>, John Polstra writes:
> 
> Can you try to MFC rev 1.111 and see if that changes anything ?

That produced some interesting results.  I am still testing under
very heavy network interrupt load.  With the change from 1.111, I
still get the microuptime messages about as often.  But look how
much larger the reported backwards jumps are:

    microuptime() went backwards (896.225603 -> 888.463636)
    microuptime() went backwards (896.225603 -> 888.494440)
    microuptime() went backwards (896.225603 -> 888.500875)
    microuptime() went backwards (1184.392277 -> 1176.603001)
    microuptime() went backwards (1184.392277 -> 1176.603749)

John
-- 
  John Polstra
  John D. Polstra & Co., Inc.                        Seattle, Washington USA
  "Disappointment is a good sign of basic intelligence."  -- Chögyam Trungpa


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