Date: Wed, 20 Sep 2000 05:23:03 +1100 (EST) From: Bruce Evans <bde@zeta.org.au> To: "Andrey A. Chernov" <ache@nagual.pp.ru> Cc: current@FreeBSD.ORG Subject: Re: recent kernel, microuptime went backwards Message-ID: <Pine.BSF.4.21.0009200514520.2289-100000@besplex.bde.org> In-Reply-To: <20000919184043.A346@nagual.pp.ru>
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On Tue, 19 Sep 2000, Andrey A. Chernov wrote: > With very latest kernel I got lots of > > microuptime() went backwards (1.3624050 -> 1.998840) > > messages just before > > Mounting root from ufs:/dev/da0s1a It really does go backwards. This is caused by the giant lock preventing the clock interrupt task from running soon enough. The giant lock can also prevent the clock interrupt task from running often enough even after booting. E.g., "dd if=/dev/random of=/dev/null bs=large" does several bad things. Bruce To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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