[LAU] RT kernel

[Rui Nuno Capela]

On 11/05/2016 12:45 AM, Paul Davis wrote:
>
> On Fri, Nov 4, 2016 at 9:51 PM, Rui Nuno Capela wrote:
>>
>>  echo "CONFIG_PREEMPT_RT_FULL=y" >> .config
 >>  echo "CONFIG_HZ_1000=y" >> .config
>>
>> On 11/04/2016 09:24 PM, Paul Davis wrote:
>>>
>>> surely a tickless kernel is much better on almost any vaguelymodern hardware?
>>>
>>> On Fri, Nov 4, 2016 at 3:30 PM, Rui Nuno Capela wrote:
>>>>
>>>> none of the above abstains you from a tickless kernel
>>>>
>>>> CONFIG_NO_HZ and CONFIG_NO_HZ_IDLE are untouched, as far as`make oldconfig` goes
>>>>
>
> i'm just wondering why you'd bother to set HZ when the preferred configuration is NO_HZ .. ?
>

well, the so called "tickless" option is about omitting kernel 
scheduling clock ticks on *idle* cpus. the sched clock will still tick 
to the HZ setting on regular basis on non-idle situations.

setting the HZ=1000 is mostly desirable for the default ALSA MIDI system
timers to have a better resolution than the Linus' default (HZ=250).

byee
-- 
rncbc aka. Rui Nuno Capela