On Wed, Aug 22, 2012 at 5:39 PM, richard -rw- weinberger <
richard.weinber...@gmail.com> wrote:
> On Wed, Aug 22, 2012 at 3:23 PM, Dragos Diaconescu
> <diacones...@gmail.com> wrote:
> > On an ubuntu kernel I used a busy waiting, with ndelay function which
> uses
> > the TSC register, but
> > I have noticed that this register cannot be read from an UML.
>
> Please provide a test case.
> I don't have yet a test case. What I want to do is to make a busy
> waiting, and interrupt this busy waiting
>
at an interval of some nanoseconds and to use the ndelay function. I saw
that in the kernel implementation
for the uml there is no "delay_tsc"
function and there is only the "delay_loop" function. I am wondering why
the delay_tsc is not implemented. Is it not
possible to read the TSC register?
I would need this for having a nanosecond precision.
--
> Thanks,
> //richard
>
Best wishes,
Dragos
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