Re: ACPI-fast default timecounter, but HPET 83% faster

2009-06-14 Thread Kris Kennaway
John Baldwin wrote: 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

Re: ACPI-fast default timecounter, but HPET 83% faster

2009-04-30 Thread John Baldwin
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

Re: ACPI-fast default timecounter, but HPET 83% faster

2009-04-30 Thread Bruce Cran
On Thu, 30 Apr 2009 08:46:41 -0400 John Baldwin j...@freebsd.org wrote: On Sunday 26 April 2009 10:27:42 pm Garrett Cooper wrote: 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

Re: ACPI-fast default timecounter, but HPET 83% faster

2009-04-27 Thread Joerg Sonnenberger
On Mon, Apr 27, 2009 at 01:50:31AM +0200, Pieter de Goeje wrote: While fiddling with the sysctl kern.timecounter.hardware, I found out that on my system HPET is significantly faster than ACPI-fast. I did some extensive testing on a variety of AMD and Intel boards and never found a system where

Re: ACPI-fast default timecounter, but HPET 83% faster

2009-04-26 Thread Garrett Cooper
On Sun, Apr 26, 2009 at 4:50 PM, Pieter de Goeje pie...@degoeje.nl wrote: Dear hackers, While fiddling with the sysctl kern.timecounter.hardware, I found out that on my system HPET is significantly faster than ACPI-fast. Using the program below I measured the number of clock_gettime() calls