Date: Mon, 01 Apr 1996 12:05:18 +0000 From: Poul-Henning Kamp <phk@critter.tfs.com> To: Bruce Evans <bde@zeta.org.au> Cc: freebsd-current@freefall.freebsd.org, kuku@gilberto.physik.rwth-aachen.de Subject: Re: calcru: negative time: Message-ID: <15516.828360318@critter.tfs.com> In-Reply-To: Your message of "Mon, 01 Apr 1996 21:15:40 %2B1000." <199604011115.VAA15805@godzilla.zeta.org.au>
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> >[deleted] > >calcru: negative time: -11929 usec > >calcru: negative time: -3909 usec > >calcru: negative time: -3842 usec > >calcru: negative time: -17709 usec > >calcru: negative time: -3480 usec > > This is caused by hardclock() interrupt latency. The problem is > especially noticable on i586's and i686's because any latency causes the > clock to go backwards; on i386's and i486's, the latency must be > 1 > clock tick (10000 usec) to cause problems. Normally the latency on > i586's is > 0 but < 10 usec and isn't detectable. There must be bugs > elsewhere to cause latencies of more than a few tens of usecs. My i386 has really high numbers here. Could this be a spl<something() botch ? -- Poul-Henning Kamp | phk@FreeBSD.ORG FreeBSD Core-team. http://www.freebsd.org/~phk | phk@login.dknet.dk Private mailbox. whois: [PHK] | phk@ref.tfs.com TRW Financial Systems, Inc. Future will arrive by its own means, progress not so.
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