On Sunday 26 April 2009 10:27:42 pm Garrett Cooper wrote: > I'm seeing similar results. > > [r...@orangebox /usr/home/gcooper]# dmesg | grep 'Timecounter "' > Timecounter "i8254" frequency 1193182 Hz quality 0 > Timecounter "ACPI-fast" frequency 3579545 Hz quality 1000 > Timecounter "HPET" frequency 14318180 Hz quality 900 > [r...@orangebox /usr/home/gcooper]# ./cgt > 1369355 > [r...@orangebox /usr/home/gcooper]# sysctl > kern.timecounter.hardware="ACPI-fast" > kern.timecounter.hardware: HPET -> ACPI-fast > [r...@orangebox /usr/home/gcooper]# ./cgt > 772289 > > Why's the default ACPI-fast? For power-saving functionality or because > of the `quality' factor? What is the criteria that determines the > `quality' of a clock as what's being reported above (I know what > determines the quality of a clock visually from a oscilloscope =])?
I suspect that the quality of the HPET driver is lower simply because no one had measured it previously and HPET is newer and less "proven". -- John Baldwin _______________________________________________ freebsd-hackers@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to "freebsd-hackers-unsubscr...@freebsd.org"
