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Date:      Wed, 06 Feb 2002 01:02:34 -0500 (EST)
From:      John Baldwin <jhb@FreeBSD.org>
To:        Garance A Drosihn <drosih@rpi.edu>
Cc:        current@FreeBSD.org
Subject:   RE: Performance of -current vs -stable
Message-ID:  <XFMail.020206010234.jhb@FreeBSD.org>
In-Reply-To: <p05101401b88638b62611@[128.113.24.47]>

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On 06-Feb-02 Garance A Drosihn wrote:
> Could it be due to the DDB, INVARIANTS & WITNESS options in the
> kernel?  If it is that's fine with me, I'm just wondering where
> that magnitude of a slowdown would be coming from.

WITNESS can really hurt.  Quite possibly I should turn it off in GENERIC now (I
wouldn't mind if someone else did that.)  Before major locking changes people
should still use it to look for bugs, but it isn't very efficient I'm afraid. :(

-- 

John Baldwin <jhb@FreeBSD.org>  <><  http://www.FreeBSD.org/~jhb/
"Power Users Use the Power to Serve!"  -  http://www.FreeBSD.org/

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