Serge Bets <[EMAIL PROTECTED]> writes: > On Thursday, July 24, 2008 at 1:48:40 +0000, Bill Unruh wrote:
>> Apparently the HPET disables the rtc interrupts and takes them over. >Those HPET emulated RTC interrupts indeed seem to be nothing else than >unusable rubbish, by design. They introduce an unacceptable level of >error in the measures. Error 4 orders of magnitude greater than what's >reasonably expectable from proper RTC interrupts. The problem is a balance between uacceptable number of interrupts vs accuracy. Having100KHz interrupt rate just to impliment UIE would be unacceptable. >> No amount of care in the hwclock program can get around this kind of >> nonesense. >Exactly. Disabling HPET seems the only solution to have proper RTC >interrupts. Alternatively tell hwclock to *not* use interrupts, via >either the --directisa or --nointerrupt options. This is less elegant, >and costs many processor cycles. But accuracy should be good. >Serge. >-- >Serge point Bets arobase laposte point net _______________________________________________ questions mailing list [email protected] https://lists.ntp.org/mailman/listinfo/questions
