[PATCH] eal/unix: allow creating thread with real-time priority

[Thomas Monjalon]

25/10/2023 17:18, Thomas Monjalon:
> 25/10/2023 17:14, Bruce Richardson:
> > On Wed, Oct 25, 2023 at 08:08:52AM -0700, Stephen Hemminger wrote:
> > > On Wed, 25 Oct 2023 15:44:25 +0200
> > > Thomas Monjalon <thomas at monjalon.net> wrote:
> > > 
> > > > > > 
> > > > > > I'll try to pass the test by adding a sleep in the test thread.
> > > > > >   
> > > > > 
> > > > > "sched_yield()" rather than sleep perhaps? Might better convey the
> > > > > intention of the call.  
> > > > 
> > > > Do we have sched_yield on Windows?
> > > 
> > > Windows has an equivalent but sched_yield() won't work here.
> > > Since the DPDK thread is still higher priority than the kernel thread,
> > > the scheduler will reschedule the DPDK thread. You need to sleep
> > > to let kthread run.
> > 
> > Interesting. Thanks for clarifying the situation.
> 
> Indeed interesting.
> I've just sent a v2 before reading this.
> 
> So I should try a v3 with a sleep.
> But then I need to find a better name than rte_thread_yield.
> Ideas?

I will go with rte_thread_yield_realtime().
Any sleep will suffice on Linux? What about a nanosleep?
I suppose Sleep(0) is OK on Windows?