Re: Kernel without RTC

[Hadimani, Jagadish]

Hello Alexandre,

I guess the Linux kernel uses HPET timer...
But can we can force Linux kernel to use Tsc or per core timer...

Sent from my iPhone

> On 8 Mar 2017, at 6:47 PM, Alexandre Belloni <alexandre.belloni@xxxxxxxxxxxxxxxxxx> wrote:
> 
> Hi,
> 
>> On 07/03/2017 at 00:48:18 +0530, Shah, Nehal-bakulchandra wrote:
>> Hi,
>> 
>> Currently we are having hardware which does not have RTC. It is single processor system. However it does have TSC timer.
>> 
>> Now, how to use scheduler with only TSC as current kernel scheduler leverage the RTC for scheduling? I had seen one old patch
>> 
>> http://marc.info/?l=linux-kernel&m=112013203625990&w=2 
>> 
>> But i guess this patch was later on not taken, It will be great if you can some pointers to move forward?
>> 
> 
> The kernel doesn't use the RTC for its time source so it can
> already work without an RTC.
> 
> 
> -- 
> Alexandre Belloni, Free Electrons
> Embedded Linux and Kernel engineering
> http://free-electrons.com