Date: Wed, 1 Sep 2010 18:29:48 -0500 From: Brandon Gooch <jamesbrandongooch@gmail.com> To: Alexander Motin <mav@freebsd.org> Cc: freebsd-hackers@freebsd.org, FreeBSD-Current <freebsd-current@freebsd.org> Subject: Re: One-shot-oriented event timers management Message-ID: <AANLkTikL8Bwg=eX-eUX50VThVkYJ-H_Bz1dB6geKHPYy@mail.gmail.com> In-Reply-To: <4C7EA696.3030901@FreeBSD.org> 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> <4C7EA696.3030901@FreeBSD.org>
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On Wed, Sep 1, 2010 at 2:16 PM, Alexander Motin <mav@freebsd.org> wrote: > 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 Definitely solved it!!! Awesome, BTW, check out my C3 time: # gnu-watch -n1 'sysctl dev.cpu | grep cx_usage' Every 1.0s: sysctl dev.cpu | grep cx_usage Wed Sep 1 17:56:31 2010 dev.cpu.0.cx_usage: 0.00% 0.03% 99.96% last 7159us dev.cpu.1.cx_usage: 0.00% 0.00% 100.00% last 6343us I've now seen my computer at it's lowest battery drain rate yet (around 11000 mW) while "using" my system. This just keeps getting better and better mav@, hope we see more testers soon :) -Brandon
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