On Wed, 23 Jan 2008 18:38:53 PST, john stultz said: > I recently noticed on one of my boxes that when synched with an NTP > server, the drift value reported for the system was ~283ppm. While in > some cases, clock hardware can be that bad, it struck me as unusual as > the system was using the acpi_pm clocksource, which is one of the more > trustworthy and accurate clocksources on x86 hardware. > > I brought up another system and let it sync to the same NTP server, and > I noticed a similar 280some ppm drift.
So I got curious, and dropped the patch onto my workstation - 24-rc8-mm1 x86_64 and it applied just fine with an offset reported. Before the patch, the drift was reported as 140.67 or so. After, it's sitting at -0.681. Am running with hpet clocksource rather than acpi_pm, which probably explains the 140 I see rather than the 280 John saw....
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