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Message-ID: <48E48EE9.9090900@symas.com> Date: Thu, 02 Oct 2008 02:05:45 -0700 From: Howard Chu <hyc@...as.com> To: Thomas Gleixner <tglx@...utronix.de> CC: linux-kernel <linux-kernel@...r.kernel.org> Subject: Re: APIC frequency too slow on HP dv5z Thomas Gleixner wrote: > On Tue, 30 Sep 2008, Howard Chu wrote: > >> More often than not, on a warm boot I see something like this >> >> msg.new:[ 1.940031] Using local APIC timer interrupts. >> msg.new:[ 1.944031] APIC timer calibration result 466046 >> msg.new:[ 1.944031] Detected 0.466 MHz APIC timer. >> msg.new:[ 1.944031] APIC frequency too slow, disabling apic timer >> >> On cold boots it may see 12.5MHz, or may not... >> >> [ 2.000584] Using local APIC timer interrupts. >> [ 2.004067] APIC timer calibration result 12500236 >> [ 2.004080] Detected 12.500 MHz APIC timer. >> >> I haven't figured out yet what the pattern is behind the behavior. Has anyone >> else seen this kind of problem before? > > Hmm, strange. Which kernel version ? I only started paying attention recently. 2.6.27-rc4 thru rc7 for sure. I'm running rc7 right now, that's what those log snippets are from. -- -- Howard Chu CTO, Symas Corp. http://www.symas.com Director, Highland Sun http://highlandsun.com/hyc/ Chief Architect, OpenLDAP http://www.openldap.org/project/ -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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