[PATCH v2] tests: posix: use cpu clock for sleep

[Yury Khrustalev]

On Wed, Feb 18, 2026 at 09:51:06AM +0000, Yury Khrustalev wrote:
> On Tue, Feb 17, 2026 at 01:09:56PM -0500, DJ Delorie wrote:
> > Yury Khrustalev <yury.khrustalev@arm.com> writes:
> > >  so I don't see what's wrong here. Please elaborate.
> > 
> > Perhaps I'm miscommunicating.
> > 
> > I don't care which clock you use to determine if 2 seconds has passed.

> > ...

> > 
> > This is a busy-wait loop.  It would be better on most platforms to do
> > *something* to pause the program, even if only a little.  Example:
> > 
> > +  while (ts.tv_sec < end || (ts.tv_sec == end && ts.tv_nsec < end_ns))
> > +    {
> > +      sleep(1);
> > +      clock_gettime (CLOCK_PROCESS_CPUTIME_ID, &ts);
> > +    }

Also, CLOCK_PROCESS_CPUTIME_ID time does not increase when the process
sleeps (i.e. does not consume CPU time).