Yea but to be clear that's non a dynamic value it has to be configured when the kernel is compiled. Some unix flavors had that option due to odd differences between different versions of their own home grown hardware. That really is an unusual thing to adjust now unless you are running on some funkie nonstandard embeded cpu On Oct 3, 2012 4:17 PM, "Akemi Yagi" <[email protected]> wrote: > > On Wed, Oct 3, 2012 at 3:02 AM, jdow <[email protected]> wrote: > > On 2012/10/03 01:33, g wrote: > > >> as stated in orig post, it was used as a _factor_to_adjust_ the > >> 'tick rate'. no speed up or slow down as 'adj-time' does. > > > I have the impression that Linux tends to be tickless and adjusts > > itself to perceived needs to a large degree. But I've not followed > > that very much of late. > > RHEL (therefore SL) kernels became tickless as of 6.0. > > If the OP meant, by 'tick rate', "kernel timer interrupt frequency", > then it is defined in the kernel config. > > In the case of SL 6.3 kernels, > > $ grep _HZ /boot/config-`uname -r` > CONFIG_NO_HZ=y > # CONFIG_HZ_100 is not set > # CONFIG_HZ_250 is not set > # CONFIG_HZ_300 is not set > CONFIG_HZ_1000=y > CONFIG_HZ=1000 > > Akemi On Oct 3, 2012 4:17 PM, "Akemi Yagi" <[email protected]> wrote:
> On Wed, Oct 3, 2012 at 3:02 AM, jdow <[email protected]> wrote: > > On 2012/10/03 01:33, g wrote: > > >> as stated in orig post, it was used as a _factor_to_adjust_ the > >> 'tick rate'. no speed up or slow down as 'adj-time' does. > > > I have the impression that Linux tends to be tickless and adjusts > > itself to perceived needs to a large degree. But I've not followed > > that very much of late. > > RHEL (therefore SL) kernels became tickless as of 6.0. > > If the OP meant, by 'tick rate', "kernel timer interrupt frequency", > then it is defined in the kernel config. > > In the case of SL 6.3 kernels, > > $ grep _HZ /boot/config-`uname -r` > CONFIG_NO_HZ=y > # CONFIG_HZ_100 is not set > # CONFIG_HZ_250 is not set > # CONFIG_HZ_300 is not set > CONFIG_HZ_1000=y > CONFIG_HZ=1000 > > Akemi >
