[TUHS] UNIX on S/370

Warner Losh imp at bsdimp.com
Tue Nov 21 05:36:05 AEST 2017

On Mon, Nov 20, 2017 at 12:10 PM, Larry McVoy <lm at mcvoy.com> wrote:

> On Mon, Nov 20, 2017 at 02:07:27PM -0500, Paul Winalski wrote:
> > It would mean that you wouldn't have to implement machine check
> > support and other hardware error handling.  The VM hypervisor would do
> > that for you.  It would also let you run multiple versions of UNIX
> > simultaneously.  Very convenient if you're doing kernel or driver
> > development.
> Indeed.  I'm currently trying to convince Netflix that the way to get the
> most performance out of a NUMA machine is to boot a different kernel on
> each NUMA domain.  One way we might demo that is on a 4 domain system
> lock down 3 hypervisors and their guest OS to 3/4 of the NUMA domains
> and give the host kernel the 4th.

Having a single nic presents a bit of a challenge for this... I look
forward to this demo...

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