On Wed, 9 Dec 2020 at 20:23, Sandeep <sandy.8925@xxxxxxxxx> wrote:
>
> On Wed, 9 Dec 2020 at 16:33, Chatradhi, Naveen Krishna
> <NaveenKrishna.Chatradhi@xxxxxxx> wrote:
> >
> > [AMD Official Use Only - Approved for External Use]
> >
> > Hi Guenter,
> >
> > >> This patch will require an Ack from Naveen; support for this model was previously removed due to inconsistent results; see commit f28e360f2903
> > ("hwmon: (amd_energy) match for supported models"),
> > I could not get hold of a board with the mentioned processor.
> >
> > Sandeep,
> >
> > Earlier, we noticed on some of the family 17h processors the core and socket energy counters are not well calibrated.
> >
> > While running avx-turbo work load https://github.com/travisdowns/avx-turbo as below, we noticed that for a given time,
> > the sum of the energy consumed by all the cores in a socket is greater than the energy consumed by the socket itself.
> >
> > Can you run the avx-turbo test, with following options and confirm the results ?
> >
> > ./avx-turbo --iters 10000000 --spec avx256_fma_t/8
> >
> > This will run AVX code on all 8 cores for about 1 second. To run it for longer, increase the --iters argument.
> >
> > Regards,
> > Naveenk
>
> Sure, I'll run that test. I have a 3900X though, which is 12 core, so
> do I have to adjust anything for that CPU, or just run with the
> parameters you've specified?
>
> - Sandeep
Ok, I ran the test for both 8 cores and 12 cores - in both cases, I
can confirm that the sum of the energy consumed by all the cores in a
socket, is NOT greater than the energy consumed by the socket itself.
- Sandeep
