Date: Sat, 27 Sep 2008 08:20:04 GMT From: "Paul van Berlo" <pvanberlo@fastmail.fm> To: freebsd-amd64@FreeBSD.org Subject: Re: amd64/127484: [timecounters] Drift problem with FreeBSD 7.0 and 7.1 PRERELEASE Message-ID: <200809270820.m8R8K4Te085359@freefall.freebsd.org>
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The following reply was made to PR amd64/127484; it has been noted by GNATS. From: "Paul van Berlo" <pvanberlo@fastmail.fm> To: bug-followup@FreeBSD.org, tg.at.swox.com@FreeBSD.org Cc: Subject: Re: amd64/127484: [timecounters] Drift problem with FreeBSD 7.0 and 7.1 PRERELEASE Date: Sat, 27 Sep 2008 09:52:00 +0200 Hello, I'm experiencing the exact same issue on 7.0/amd64. I have an Asrock A780FullDisplayPort mainboard (with an AMD Athlon64 X2 CPU, CnQ disabled, so the CPU doesn't throttle and always runs at 2.0Ghz, tested with both ACPI HPET enabled and disabled in bios), and looking at NTP it appears my clock is between 1-3 seconds slow each time it synchronizes. kern.timecounter.choice: TSC(-100) HPET(900) ACPI-safe(850) i8254(0) dummy(-1000000) I tried setting kern.timecounter.hardware to HPET (default), ACPI-safe and i8254. Neither of these solved the issue. I also set kern.hz=100 which didn't solve the issue either. 27 Sep 08:52:07 ntpd[761]: ntpd exiting on signal 15 27 Sep 08:53:25 ntpd[761]: synchronized to 194.171.167.130, stratum=1 27 Sep 08:53:27 ntpd[761]: time reset +1.365546 s 27 Sep 08:54:38 ntpd[761]: synchronized to 194.171.167.130, stratum=1 27 Sep 09:08:46 ntpd[761]: synchronized to 194.109.153.91, stratum=3 27 Sep 09:08:48 ntpd[761]: synchronized to 194.171.167.130, stratum=1 27 Sep 09:16:20 ntpd[761]: time reset +2.359489 s 27 Sep 09:16:20 ntpd[761]: kernel time sync enabled 2001 27 Sep 09:17:32 ntpd[761]: synchronized to 194.109.153.91, stratum=3 27 Sep 09:17:32 ntpd[761]: synchronized to 194.171.167.130, stratum=1 27 Sep 09:30:40 ntpd[761]: synchronized to 194.171.167.130, stratum=1 27 Sep 09:38:10 ntpd[761]: time reset +2.907558 s 27 Sep 09:39:21 ntpd[761]: synchronized to 194.171.167.130, stratum=1 Best regards, Paul van Berlo
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