-----BEGIN PGP SIGNED MESSAGE----- Hash: RIPEMD160 Brad Knowles wrote:
>> At 4:53 PM +0000 2005-09-29, John Pettitt wrote: >> > >>>> I don't agree with Brad that 10ms is as good as it gets, > >> >> >> If your HZ= setting is 100, then 10ms is, by definition, as good >> as it gets. At least, when it comes to measuring short-term single >> event clock timing matters. >> >> No HZ is not the gating factor because the system returns a time based on the processor cycle count (*) On my FreeBSD Celeron box a tight loop calling gettimeofday() shows an average increment of 1.4 microseconds per loop and yes the values change on every call. John (*) on machines with APM enabled all bets are off because the CPU frequency is not stable. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.1 (MingW32) iD8DBQFDPEafaVyA7PElsKkRA2brAKD1mAc/K/e4yd5lckB+p4AkhZvH7gCdEKcG dAbH1+jjGWSt96cTIthWA3A= =Qay5 -----END PGP SIGNATURE----- _______________________________________________ questions mailing list [email protected] https://lists.ntp.isc.org/mailman/listinfo/questions
