On 8/7/07, Dor Laor <[EMAIL PROTECTED]> wrote: > Luca claims the HPET intefer the RTC. Can it be disabled? ( I know some > new chipsets implement rtc using HPET).
Basically HPET can operate in legacy mode - where it uses the same IRQ as the RTC (and RTC won't deliver any interrupt) - or in "standard" mode where the IO-APIC can be configured to deliver the interrupt on any line. ATM Linux can only use the legacy mode. You can of course disable HPET, but then it won't be available for in-kernel timekeeping (in case e.g. the TSC is not stable/synced). I'd rather add support for HPET as timer in QEMU... On the original issue: if the host is running at HZ=100 then the precision of the timer may be a awkward (usually around 20ms), but it's surprising that it causes such a huge drift. Luca ------------------------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now >> http://get.splunk.com/ _______________________________________________ kvm-devel mailing list kvm-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/kvm-devel
