Date: Sat, 11 Sep 2010 08:18:51 +0300 From: Alexander Motin <mav@FreeBSD.org> To: Bruce Cran <bruce@cran.org.uk>, FreeBSD-Current <freebsd-current@freebsd.org> Subject: Re: LAPIC timer reported as 0 Hz during boot Message-ID: <4C8B113B.6040607@FreeBSD.org> In-Reply-To: <mailpost.1284160672.8998064.30186.mailing.freebsd.current@FreeBSD.cs.nctu.edu.tw> References: <mailpost.1284160672.8998064.30186.mailing.freebsd.current@FreeBSD.cs.nctu.edu.tw>
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Bruce Cran wrote: > Looking through a dmesg from today I noticed that the LAPIC timer is being > reported as running at 0 Hz: > > Event timer "LAPIC" frequency 0 Hz quality 500 Frequency of LAPIC timer is not reported instantly. It requires calibration to be discovered. Calibration requires time. To reduce boot time I am not calibrating LAPIC timer until it is used first time. With presence of HPET timer there is high chance that LAPIC timer will never be calibrated on significant part of systems. It is not a bug. -- Alexander Motin
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