Re: TSC Timer "Quality" ?
Peter B schrieb: Btw, avoid html encoded email pls. I'm really sorry. :-( Normally I disapprove HTML mails. I forgot to check that because this is not my PC. Björn ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"
Re: TSC Timer "Quality" ?
> >Intel pentium cpu timer tsc: > 'Timecounter "TSC" frequency X Hz quality Y' (from dmesg) > >What is the definition of "quality" ..? > > >I have looked briefly in the /usr/src/sys/i386/i386/tsc.c sourcefile and >the intel-celeron datasheet. Without finding anything useful. > > From src/sys/sys/timetc.h: >54 int tc_quality; >55 /* >56 * Used to determine if this timecounter is > better than >57 * another timecounter higher means better. > Negative >58 * means "only use at explicit request". >59 */ > As far as I understand this, it is used internally only. > Regards > Björn Hmm.. should have looked into the header =) Guess I'll have to check the clock circuit physicaly.. The reason for asking is to explore a way to sample signals asynchronously. But useing timestamps to calculate how it looks when sampled synchronously. Thus avoiding the need for fifo circuitry. Btw, avoid html encoded email pls. ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"
Re: TSC Timer "Quality" ?
Peter B schrieb: Intel pentium cpu timer tsc: 'Timecounter "TSC" frequency X Hz quality Y' (from dmesg) What is the definition of "quality" ..? I have looked briefly in the /usr/src/sys/i386/i386/tsc.c sourcefile and the intel-celeron datasheet. Without finding anything useful. From src/sys/sys/timetc.h: 54 int tc_quality; 55 /* 56 * Used to determine if this timecounter is better than 57 * another timecounter higher means better. Negative 58 * means "only use at explicit request". 59 */ As far as I understand this, it is used internally only. Regards Björn ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"
