Date: Wed, 01 Sep 2010 19:13:27 +0300 From: Alexander Motin <mav@FreeBSD.org> To: gljennjohn@googlemail.com Cc: freebsd-hackers@freebsd.org, FreeBSD-Current <freebsd-current@freebsd.org> Subject: Re: One-shot-oriented event timers management Message-ID: <4C7E7BA7.5090206@FreeBSD.org> In-Reply-To: <20100901180926.4b04e2cc@ernst.jennejohn.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> <20100901141541.3e36c868@ernst.jennejohn.org> <20100901180926.4b04e2cc@ernst.jennejohn.org>
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Gary Jennejohn wrote: > On Wed, 1 Sep 2010 14:15:41 +0200 > Gary Jennejohn <gljennjohn@googlemail.com> wrote: > >> On Wed, 01 Sep 2010 13:44:26 +0300 >> Alexander Motin <mav@FreeBSD.org> wrote: >>> Updated patch: http://people.freebsd.org/~mav/timers_oneshot6.patch >>> >>> Patch also includes some optimizations to reduce lock contention. >>> >>> Thanks for testing. >>> >> OK, I'll give it a try, althought your previous patch seems to be working >> quite well. > > This has changed the behavior of the HPET timers somewhat. > > With patch5 I was seeing approximately equal interrupt counts from > hpet0 and hpet1. > > Now the majority of interrupts are on hpet0 by a factor of 6 to 10. > > Not a show stopper, just thought I'd mention it. > > One difference is that I didn't apply tm6292_idle.patch this time. That could be the reason. This patch removes up to few hundreds events per second. -- Alexander Motin
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