Hi,
I realize this is an older thread but I have spent much of today trying
to
diagnose the problem.
I have discovered how to reliably reproduce the problem with very little
effort.
It seems that reproducing the issue has been hit and miss for people as
it seems
to primarily affect games/programs that make use of nVidia PhysX. My
understanding of npt's inner workings is quite primitive but I have
still spent
much of my time trying to diagnose the fault and identify the cause.
Using the free program FluidMark[1] it is possible to reproduce the
issue, where
on a GTX 1080Ti the rendering rate drops to around 4 fps with npt turned
on, but
if turned off the render rate is in excess of 60fps.
I have produced traces for with and without ntp enabled during these
tests which
I can provide if it will help. So far I have been digging through how
npt works
and trying to glean as much information as I can from the source and the
AMD
specifications but much of this and how mmu works is very new to me so
progress
is slow.
If anyone else has looked into this and has more information to share I
would be
very interested.
Kind Regards,
Geoffrey McRae
HostFission
https://hostfission.com
[1]:
http://www.geeks3d.com/20130308/fluidmark-1-5-1-physx-benchmark-fluid-sph-simulation-opengl-download/
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