Alex,
> >> If it's the latter, we could just have ppc64_cpu --smt=x also set the
> >> subcore amount in parallel to the thread count.
> > FWIW on powernv we just nap the threads on hotplug.
> >
> >> The reason I'm bringing this up is that I'm not quite sure who would be
> >> the instance doing the
On 23.05.14 12:11, Michael Neuling wrote:
Also, is there any performance penalty associated with split core mode?
If not, could we just always default to split-by-4 on POWER8 bare metal?
Yeah, there is a performance hit . When you are split (ie
subcores_per_core = 2 or 4), the core is stuck in
> >> Also, is there any performance penalty associated with split core mode?
> >> If not, could we just always default to split-by-4 on POWER8 bare metal?
> > Yeah, there is a performance hit . When you are split (ie
> > subcores_per_core = 2 or 4), the core is stuck in SMT8 mode. So if you
> > o
On 23.05.14 12:00, Michael Neuling wrote:
On Fri, 2014-05-23 at 11:53 +0200, Alexander Graf wrote:
On 23.05.14 10:15, Michael Neuling wrote:
This patch series implements split core mode on POWER8. This enables up to 4
subcores per core which can each independently run guests (per guest SPRs l
On Fri, 2014-05-23 at 11:53 +0200, Alexander Graf wrote:
> On 23.05.14 10:15, Michael Neuling wrote:
> > This patch series implements split core mode on POWER8. This enables up to
> > 4
> > subcores per core which can each independently run guests (per guest SPRs
> > like
> > SDR1, LPIDR etc are
On 23.05.14 10:15, Michael Neuling wrote:
This patch series implements split core mode on POWER8. This enables up to 4
subcores per core which can each independently run guests (per guest SPRs like
SDR1, LPIDR etc are replicated per subcore). Lots more documentation on this
feature in the code
This patch series implements split core mode on POWER8. This enables up to 4
subcores per core which can each independently run guests (per guest SPRs like
SDR1, LPIDR etc are replicated per subcore). Lots more documentation on this
feature in the code and commit messages.
Most of this code is i
