Date: Wed, 01 Sep 2010 22:16:38 +0300 From: Alexander Motin <mav@FreeBSD.org> To: Brandon Gooch <jamesbrandongooch@gmail.com> Cc: freebsd-hackers@freebsd.org, FreeBSD-Current <freebsd-current@freebsd.org> Subject: Re: One-shot-oriented event timers management Message-ID: <4C7EA696.3030901@FreeBSD.org> In-Reply-To: <AANLkTikcHn-SXk7Rx6NcSQKtBh-Df-g2pzeU%2BzHor9Vy@mail.gmail.com> References: <4C7A5C28.1090904@FreeBSD.org> <20100830110932.23425932@ernst.jennejohn.org> <4C7B82EA.2040104@FreeBSD.org> <20100830121148.11926306@ernst.jennejohn.org> <20100831102918.4f5404cc@ernst.jennejohn.org> <4C7CC1DE.1080907@FreeBSD.org> <4C7E2E8A.3030709@FreeBSD.org> <AANLkTikcHn-SXk7Rx6NcSQKtBh-Df-g2pzeU%2BzHor9Vy@mail.gmail.com>
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Brandon Gooch wrote: > This latest patch causes an interrupt storm with the HPET timer on my > system. The machine took about 8 minutes to boot and bring me to a > login prompt. System interactivity (i.e. input from keyboard, output > on console) was fine, but after checking the output of `systat vmstat > -1`, I saw the interrupt rate on each HPET entry was over 120k! > > Can I provide any useful detail? Of course, test patches are always welcome :) I was able to reproduce alike storm in some situations. Try new version: http://people.freebsd.org/~mav/timers_oneshot7.patch -- Alexander Motin
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