Hi, AFAIK. If you enable CONFIG_NO_HZ, then there is no meaning of HZ. If CPU is heavy loaded it run with 10ms, and it idle then timer tick is off. 2. drawback of dynamic CONFIG_NO_HZ tick a) slow response (less interactive system) On Fri, Jun 29, 2012 at 9:36 AM, Mulyadi Santosa <mulyadi.santosa@gmail.com> wrote:
Hi...
On Thu, Jun 28, 2012 at 6:21 PM, solmac john <johnsolmac@gmail.com> wrote:
Thanks for reply
what is CONFIG_NO_HZ
it enables so called dynamic tick....
can we enable CONFIG_NO_HZ and CONFIG_HZ both in our config
yup...that's fine...even better, it's recommended nowadays to reduce power consumption at certain degree.
and what the drawback of dynamic CONFIG_NO_HZ tick.
uhm, some people said to me that in certain combination, config_no_hz will introduce higher latency. This is due to the cost of occasional timer rearming, instead of classic approach where timer is programmed to shot regularly. But, if your setup is not very latency sensitive, the overhead is most likely negligible.
-- regards,
Mulyadi Santosa Freelance Linux trainer and consultant
blog: the-hydra.blogspot.com training: mulyaditraining.blogspot.com
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