jchodera
commented
7 months ago Can we train a Nequip model on SPICE and enable that to be usable through openmm-ml?
Open sef43 opened 9 months ago
jchodera
commented
7 months ago Can we train a Nequip model on SPICE and enable that to be usable through openmm-ml?
svarner9
commented
2 months ago Hello,
Has there been any further progress on this? I have used NequIP in LAMMPS but would like to instead use OpenMM because it is more compatible with the enhanced sampling packages that I use.
I have tried running simulations with a NequIP potential with openmm-ml in its current state, however the speed is significantly slower than in LAMMPS. Both simulations are run on a single GPU, however in LAMMPS I also use 32 cpu threads and kokkos.
I am not sure if I am doing something incorrect in running openmm-ml, but currently it is unusable for my rather simple system of 645 atoms. Is it expected for it to be slow on a system of this size in its current state?
I can provide further information if needed. Thank you so much in advance!
Best, Sam
JMorado
commented
2 months ago @svarner9, could you try the current implementation available here? It uses the NNPOps neighbor list, so I anticipate it might be slightly faster for a system of the size you're working with. You can create the MLPotential using something along these lines:
potential = MLPotential('nequip', modelPath='model.pth', lengthScale=0.1, energyScale=4.184)What speed-up did you observe in your LAMMPS simulations compared to OpenMM/OpenMM-ML?
JMorado
commented
2 months ago Just for the records, I'm posting here a comparison between the energies I get when using this OpenMM-ML interface and the ASE-like NequIPCalculator. The script I'm using to calculate the energies is the following:
import openmm as mm
import openmm.app as app
import openmm.unit as unit
from ase import Atoms
from nequip.ase.nequip_calculator import NequIPCalculator
from openmmml import MLPotential
lengthScale = 0.1 # Angstrom to nm
energyScale = 96.4853075 # eV to kJ/mol
model = "si-deployed.pth"
pdb_file = "si.pdb"
# Calculate the energy using a NequIPCalculator
pdb = app.PDBFile(pdb_file)
calculator = NequIPCalculator.from_deployed_model(model)
atoms_string = "".join([atom.element.symbol for atom in pdb.topology.atoms()])
positions = pdb.getPositions(asNumpy=True).value_in_unit(unit.angstrom)
cell = (
pdb.topology.getPeriodicBoxVectors().value_in_unit(unit.angstrom)
if pdb.topology.getPeriodicBoxVectors()
else None
)
atoms = Atoms(
atoms_string, positions=positions, cell=cell, pbc=False if cell is None else True
)
calculator.calculate(atoms)
pot_energy = calculator.get_potential_energy()
print("NequIPCalculator energy: {}".format(pot_energy * energyScale))
# Calculate the energy using OpenMM
potential = MLPotential(
"nequip",
modelPath=model,
lengthScale=lengthScale,
energyScale=energyScale,
)
system = potential.createSystem(pdb.topology)
integrator = mm.LangevinIntegrator(
300 * unit.kelvin, 1.0 / unit.picoseconds, 1.0 * unit.femtosecond
)
simulation = app.Simulation(pdb.topology, system, integrator)
simulation.context.setPositions(pdb.positions)
print(
"OpenMM-ML energy: {}".format(
simulation.context.getState(getEnergy=True)
.getPotentialEnergy()
.value_in_unit(unit.kilojoules_per_mole)
)
)Toluene (NequIP, No PBC)
NequIPCalculator energy: -710491.18525
OpenMM-ML energy: -710491.1875Si (Allegro, PBC)
NequIPCalculator energy: -802582.8787801563
OpenMM-ML energy: -802582.875Values are in kJ/mol. They seem to disagree from the 3rd decimal place onwards. I have checked, and the same input data is being passed to the model.
peastman
commented
2 months ago They agree to eight significant digits, which is the accuracy of single precision. Do the forces have similar agreement? If so, I think it's fine.
Is there an option to predict a formation energy instead of total energy, or to subtract off per-atom mean energies? That leads to a much smaller output value and better accuracy.
JMorado
commented
2 months ago That's true, thanks for pointing that out. Regarding the forces, this is what I get (values in kJ/mol/nm):
As far as I know, there's no option to get the interaction energy or the per-atom mean energies. This atomic energy sums up to the total energy
JMorado
commented
2 months ago This is done from my side. If someone could take a look and review the changes, that would be great. Performance benchmarks on test models can be found here.
Many thanks!
svarner9
commented
1 month ago @svarner9, could you try the current implementation available here? It uses the NNPOps neighbor list, so I anticipate it might be slightly faster for a system of the size you're working with. You can create the
MLPotentialusing something along these lines:potential = MLPotential('nequip', modelPath='model.pth', lengthScale=0.1, energyScale=4.184)What speed-up did you observe in your LAMMPS simulations compared to OpenMM/OpenMM-ML?
@JMorado
I went ahead and tested out the version on the nequip branch, however I am unable to get it to run on a GPU. When I specify the potential and the platform in the following way,
potential = MLPotential("nequip",
modelPath='model.pth',
lengthScale=0.1,
energyScale=96.48)
...
plat = openmm.Platform.getPlatformByName("CUDA")
properties = {"Precision": "double", "DeviceIndex": "0",
"UseBlockingSync": "false"}
simulation = app.Simulation(topology, system, integrator, plat, properties)I get the following set of warnings and errors:
/home/svarner/miniconda3/envs/practicum/lib/python3.11/site-packages/torchani/aev.py:16: UserWarning: cuaev not installed
warnings.warn("cuaev not installed")
/home/svarner/miniconda3/envs/practicum/lib/python3.11/site-packages/nequip/scripts/deploy.py:138: UserWarning: Models deployed before v0.6.0 don't contain information about their default_dtype or model_dtype; assuming the old default of float32 for both, but this might not be right if you had explicitly set default_dtype=float64.
warnings.warn(
/home/svarner/miniconda3/envs/practicum/lib/python3.11/site-packages/nequip/utils/_global_options.py:59: UserWarning: !! Upstream issues in PyTorch versions >1.11 have been seen to cause unusual performance degredations on some CUDA systems that become worse over time; see https://github.com/mir-group/nequip/discussions/311. At present we *strongly* recommend the use of PyTorch 1.11 if using CUDA devices; while using other versions if you observe this problem, an unexpected lack of this problem, or other strange behavior, please post in the linked GitHub issue.
warnings.warn(
/home/svarner/miniconda3/envs/practicum/lib/python3.11/site-packages/nequip/utils/_global_options.py:70: UserWarning: Setting the GLOBAL value for jit fusion strategy to `[('DYNAMIC', 3)]` which is different than the previous value of `[('STATIC', 2), ('DYNAMIC', 10)]`
warnings.warn(
Traceback (most recent call last):
File "/home/svarner/Practicum/sim.py", line 174, in <module>
run(1,1,1,1,1)
File "/home/svarner/Practicum/sim.py", line 145, in run
simulation = app.Simulation(topology, system, integrator, plat, properties)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/home/svarner/miniconda3/envs/practicum/lib/python3.11/site-packages/openmm/app/simulation.py", line 106, in __init__
self.context = mm.Context(self.system, self.integrator, platform, platformProperties)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/home/svarner/miniconda3/envs/practicum/lib/python3.11/site-packages/openmm/openmm.py", line 12171, in __init__
_openmm.Context_swiginit(self, _openmm.new_Context(*args))
^^^^^^^^^^^^^^^^^^^^^^^^^^
openmm.OpenMMException: Specified a Platform for a Context which does not support all required kernelsHere is my mamba list:
# Name Version Build Channel
_libgcc_mutex 0.1 conda_forge conda-forge
_openmp_mutex 4.5 2_gnu conda-forge
ase 3.22.1 pyhd8ed1ab_1 conda-forge
blinker 1.8.2 pyhd8ed1ab_0 conda-forge
brotli 1.1.0 hd590300_1 conda-forge
brotli-bin 1.1.0 hd590300_1 conda-forge
brotli-python 1.1.0 py311hb755f60_1 conda-forge
bzip2 1.0.8 hd590300_5 conda-forge
c-ares 1.28.1 hd590300_0 conda-forge
ca-certificates 2024.2.2 hbcca054_0 conda-forge
cached-property 1.5.2 hd8ed1ab_1 conda-forge
cached_property 1.5.2 pyha770c72_1 conda-forge
certifi 2024.2.2 pyhd8ed1ab_0 conda-forge
charset-normalizer 3.3.2 pyhd8ed1ab_0 conda-forge
click 8.1.7 unix_pyh707e725_0 conda-forge
contourpy 1.2.1 py311h9547e67_0 conda-forge
cudatoolkit 11.5.2 hbdc67f6_13 conda-forge
cycler 0.12.1 pyhd8ed1ab_0 conda-forge
e3nn 0.5.1 pypi_0 pypi
filelock 3.14.0 pyhd8ed1ab_0 conda-forge
flask 3.0.3 pyhd8ed1ab_0 conda-forge
fonttools 4.51.0 py311h459d7ec_0 conda-forge
freetype 2.12.1 h267a509_2 conda-forge
fsspec 2024.3.1 pyhca7485f_0 conda-forge
gmp 6.3.0 h59595ed_1 conda-forge
gmpy2 2.1.5 py311he48d604_0 conda-forge
h5py 3.11.0 nompi_py311hebc2b07_100 conda-forge
hdf5 1.14.3 nompi_h4f84152_101 conda-forge
idna 3.7 pyhd8ed1ab_0 conda-forge
importlib-metadata 7.1.0 pyha770c72_0 conda-forge
importlib_metadata 7.1.0 hd8ed1ab_0 conda-forge
itsdangerous 2.2.0 pyhd8ed1ab_0 conda-forge
jinja2 3.1.3 pyhd8ed1ab_0 conda-forge
keyutils 1.6.1 h166bdaf_0 conda-forge
kiwisolver 1.4.5 py311h9547e67_1 conda-forge
krb5 1.21.2 h659d440_0 conda-forge
lark-parser 0.12.0 pyhd8ed1ab_0 conda-forge
lcms2 2.16 hb7c19ff_0 conda-forge
ld_impl_linux-64 2.40 h55db66e_0 conda-forge
lerc 4.0.0 h27087fc_0 conda-forge
libabseil 20230802.1 cxx17_h59595ed_0 conda-forge
libaec 1.1.3 h59595ed_0 conda-forge
libblas 3.9.0 22_linux64_openblas conda-forge
libbrotlicommon 1.1.0 hd590300_1 conda-forge
libbrotlidec 1.1.0 hd590300_1 conda-forge
libbrotlienc 1.1.0 hd590300_1 conda-forge
libcblas 3.9.0 22_linux64_openblas conda-forge
libcurl 8.7.1 hca28451_0 conda-forge
libdeflate 1.20 hd590300_0 conda-forge
libedit 3.1.20191231 he28a2e2_2 conda-forge
libev 4.33 hd590300_2 conda-forge
libexpat 2.6.2 h59595ed_0 conda-forge
libffi 3.4.2 h7f98852_5 conda-forge
libgcc-ng 13.2.0 h77fa898_7 conda-forge
libgfortran-ng 13.2.0 h69a702a_7 conda-forge
libgfortran5 13.2.0 hca663fb_7 conda-forge
libgomp 13.2.0 h77fa898_7 conda-forge
libjpeg-turbo 3.0.0 hd590300_1 conda-forge
liblapack 3.9.0 22_linux64_openblas conda-forge
libnghttp2 1.58.0 h47da74e_1 conda-forge
libnsl 2.0.1 hd590300_0 conda-forge
libopenblas 0.3.27 pthreads_h413a1c8_0 conda-forge
libpng 1.6.43 h2797004_0 conda-forge
libprotobuf 4.25.1 hf27288f_2 conda-forge
libsqlite 3.45.3 h2797004_0 conda-forge
libssh2 1.11.0 h0841786_0 conda-forge
libstdcxx-ng 13.2.0 hc0a3c3a_7 conda-forge
libtiff 4.6.0 h1dd3fc0_3 conda-forge
libtorch 2.1.2 cpu_generic_ha017de0_3 conda-forge
libuuid 2.38.1 h0b41bf4_0 conda-forge
libuv 1.48.0 hd590300_0 conda-forge
libwebp-base 1.4.0 hd590300_0 conda-forge
libxcb 1.15 h0b41bf4_0 conda-forge
libxcrypt 4.4.36 hd590300_1 conda-forge
libzlib 1.2.13 hd590300_5 conda-forge
markupsafe 2.1.5 py311h459d7ec_0 conda-forge
matplotlib-base 3.8.4 py311h54ef318_0 conda-forge
mpc 1.3.1 hfe3b2da_0 conda-forge
mpfr 4.2.1 h9458935_1 conda-forge
mpmath 1.3.0 pyhd8ed1ab_0 conda-forge
munkres 1.1.4 pyh9f0ad1d_0 conda-forge
ncurses 6.4.20240210 h59595ed_0 conda-forge
nequip 0.6.0 pypi_0 pypi
networkx 3.3 pyhd8ed1ab_1 conda-forge
nnpops 0.6 cpu_py311h7697b17_7 conda-forge
nomkl 1.0 h5ca1d4c_0 conda-forge
numpy 1.26.4 py311h64a7726_0 conda-forge
ocl-icd 2.3.2 hd590300_1 conda-forge
ocl-icd-system 1.0.0 1 conda-forge
openjpeg 2.5.2 h488ebb8_0 conda-forge
openmm 8.1.1 py311h28d7ac7_1 conda-forge
openmm-torch 1.4 cpu_py311h446247e_4 conda-forge
openmmml 1.1 pypi_0 pypi
openssl 3.3.0 hd590300_0 conda-forge
opt-einsum 3.3.0 pypi_0 pypi
opt-einsum-fx 0.1.4 pypi_0 pypi
packaging 24.0 pyhd8ed1ab_0 conda-forge
pillow 10.3.0 py311h18e6fac_0 conda-forge
pip 24.0 pyhd8ed1ab_0 conda-forge
pthread-stubs 0.4 h36c2ea0_1001 conda-forge
pyparsing 3.1.2 pyhd8ed1ab_0 conda-forge
pysocks 1.7.1 pyha2e5f31_6 conda-forge
python 3.11.9 hb806964_0_cpython conda-forge
python-dateutil 2.9.0 pyhd8ed1ab_0 conda-forge
python_abi 3.11 4_cp311 conda-forge
pytorch 2.1.2 cpu_generic_py311h1584bb0_3 conda-forge
pyyaml 6.0.1 pypi_0 pypi
readline 8.2 h8228510_1 conda-forge
requests 2.31.0 pyhd8ed1ab_0 conda-forge
scipy 1.13.0 py311h517d4fd_1 conda-forge
setuptools 65.3.0 pyhd8ed1ab_1 conda-forge
setuptools-scm 6.3.2 pyhd8ed1ab_0 conda-forge
setuptools_scm 6.3.2 hd8ed1ab_0 conda-forge
six 1.16.0 pyh6c4a22f_0 conda-forge
sleef 3.5.1 h9b69904_2 conda-forge
sympy 1.12 pypyh9d50eac_103 conda-forge
tk 8.6.13 noxft_h4845f30_101 conda-forge
tomli 2.0.1 pyhd8ed1ab_0 conda-forge
torch-ema 0.3 pypi_0 pypi
torch-runstats 0.2.0 pypi_0 pypi
torchani 2.2.4 cpu_py311h12a0d1d_3 conda-forge
tqdm 4.66.4 pypi_0 pypi
typing_extensions 4.11.0 pyha770c72_0 conda-forge
tzdata 2024a h0c530f3_0 conda-forge
urllib3 2.2.1 pyhd8ed1ab_0 conda-forge
werkzeug 3.0.3 pyhd8ed1ab_0 conda-forge
wheel 0.43.0 pyhd8ed1ab_1 conda-forge
xorg-libxau 1.0.11 hd590300_0 conda-forge
xorg-libxdmcp 1.1.3 h7f98852_0 conda-forge
xz 5.2.6 h166bdaf_0 conda-forge
zipp 3.17.0 pyhd8ed1ab_0 conda-forge
zstd 1.5.6 ha6fb4c9_0 conda-forgeIf I don't specify any platform, then the simulation runs, but extremely slowly since it is on CPU.
Thank you so much in advance!
Best, Sam
peastman
commented
1 month ago That means a plugin couldn't be loaded. Try printing the value of Platform.getPluginLoadFailures(). It will tell you which ones failed, and what the errors were.
Usually it's because some library they depended on couldn't be found, and it can be fixed by adding the directory containing the library to LD_LIBRARY_PATH.
svarner9
commented
1 month ago That means a plugin couldn't be loaded. Try printing the value of
Platform.getPluginLoadFailures(). It will tell you which ones failed, and what the errors were.Usually it's because some library they depended on couldn't be found, and it can be fixed by adding the directory containing the library to
LD_LIBRARY_PATH.
Thank you for the quick response!
I tried that based on some previous replies of yours that I found. I ran the following:
print(pluginLoadedLibNames)
print(Platform.getPluginLoadFailures())and the output was:
('/home/svarner/miniconda3/envs/practicum/lib/plugins/libOpenMMPME.so', '/home/svarner/miniconda3/envs/practicum/lib/plugins/libOpenMMCPU.so', '/home/svarner/miniconda3/envs/practicum/lib/plugins/libOpenMMCUDA.so', '/home/svarner/miniconda3/envs/practicum/lib/plugins/libOpenMMOpenCL.so', '/home/svarner/miniconda3/envs/practicum/lib/plugins/libOpenMMRPMDCUDA.so', '/home/svarner/miniconda3/envs/practicum/lib/plugins/libOpenMMDrudeCUDA.so', '/home/svarner/miniconda3/envs/practicum/lib/plugins/libOpenMMAmoebaCUDA.so', '/home/svarner/miniconda3/envs/practicum/lib/plugins/libOpenMMRPMDOpenCL.so', '/home/svarner/miniconda3/envs/practicum/lib/plugins/libOpenMMTorchOpenCL.so', '/home/svarner/miniconda3/envs/practicum/lib/plugins/libOpenMMDrudeOpenCL.so', '/home/svarner/miniconda3/envs/practicum/lib/plugins/libOpenMMAmoebaOpenCL.so', '/home/svarner/miniconda3/envs/practicum/lib/plugins/libOpenMMRPMDReference.so', '/home/svarner/miniconda3/envs/practicum/lib/plugins/libOpenMMTorchReference.so', '/home/svarner/miniconda3/envs/practicum/lib/plugins/libOpenMMDrudeReference.so', '/home/svarner/miniconda3/envs/practicum/lib/plugins/libOpenMMAmoebaReference.so')
()The failures command returned an empty tuple.
Best, Sam
peastman
commented
1 month ago The versions of PyTorch and OpenMM-Torch you have installed are CPU only:
openmm-torch 1.4 cpu_py311h446247e_4 conda-forge
pytorch 2.1.2 cpu_generic_py311h1584bb0_3 conda-forgeThat might be because you have an older version of cudatoolkit:
cudatoolkit 11.5.2 hbdc67f6_13 conda-forgeIf you upgrade it to 11.8, you might be able to get it to install the CUDA version of PyTorch. Conda installation issues like this tend to be frustrating and hard to figure out. They often depend on the precise order you install packages in.
svarner9
commented
1 month ago The versions of PyTorch and OpenMM-Torch you have installed are CPU only:
openmm-torch 1.4 cpu_py311h446247e_4 conda-forge pytorch 2.1.2 cpu_generic_py311h1584bb0_3 conda-forgeThat might be because you have an older version of
cudatoolkit:cudatoolkit 11.5.2 hbdc67f6_13 conda-forgeIf you upgrade it to 11.8, you might be able to get it to install the CUDA version of PyTorch. Conda installation issues like this tend to be frustrating and hard to figure out. They often depend on the precise order you install packages in.
Ahhh I see. Thank you!
I went ahead an uninstalled openmm-torch and pytorch. I upgraded the cudatoolkit, and then installed the cuda version of pytorch:
install pytorch pytorch-cuda=11.8 -c pytorch -c nvidiaInstalling openmm-torch downgraded it back to the cpu version, but then installing nnpops upgraded it back to the cuda version. I agree, conda installations are very frustrating.
It is working on GPU now, but only getting about 0.2 ns/day, whereas on lammps I was getting 1.5 ns/day. To your knowledge, could any of the following warnings have to do with it being slow?
/home/svarner/miniconda3/envs/practicum/lib/python3.11/site-packages/nequip/scripts/deploy.py:138: UserWarning: Models deployed before v0.6.0 don't contain information about their default_dtype or model_dtype; assuming the old default of float32 for both, but this might not be right if you had explicitly set default_dtype=float64.
warnings.warn(
/home/svarner/miniconda3/envs/practicum/lib/python3.11/site-packages/nequip/utils/_global_options.py:59: UserWarning: !! Upstream issues in PyTorch versions >1.11 have been seen to cause unusual performance degredations on some CUDA systems that become worse over time; see https://github.com/mir-group/nequip/discussions/311. At present we *strongly* recommend the use of PyTorch 1.11 if using CUDA devices; while using other versions if you observe this problem, an unexpected lack of this problem, or other strange behavior, please post in the linked GitHub issue.
warnings.warn(
/home/svarner/miniconda3/envs/practicum/lib/python3.11/site-packages/nequip/utils/_global_options.py:70: UserWarning: Setting the GLOBAL value for jit fusion strategy to `[('DYNAMIC', 3)]` which is different than the previous value of `[('STATIC', 2), ('DYNAMIC', 10)]`
warnings.warn(I tried to install the packages in such a way to allow me to use pytorch 1.11.0 (which according to the error is the most stable version with nequip), however, as far as I can tell there is no way to use pytorch 1.11.0 with openmm-torch. Every time I would install openmm-torch it would install pytorch 2.1.2.
This is the order that I did everything:
mamba create -n env
mamba activate env
mamba install python=3.10
mamba install -c conda-forge openmm cudatoolkit=11.8
pip install git+https://github.com/mir-group/nequip@develop
pip install git+https://github.com/sef43/openmm-ml@nequip
mamba install pytorch=1.11 pytorch-cuda=11.8 -c pytorch -c nvidia
mamba install -c conda-forge openmm-torch nnpopsMany thanks for the thorough review, @peastman! Most of it should be now resolved.
Thanks for testing, @svarner9. I think the slow performance you're seeing is not related to that warning, the underlying issue of which is described here. You could test if the issue that underlies that warning is indeed present by identifying a slowdown in performance over time. I ran some performance benchmarks on systems much smaller than yours and did not see any decrease in performance over time, and the simulation speed is around what I would expect.
If that is your baseline OpenMM performance, I wonder what could be causing that. Do you remember by any chance what was the performance you were getting with the previous neighbor list? Does anyone have any ideas about whether it's possible to improve performance here?
svarner9
commented
1 month ago Yes many thanks @peastman for the help!
@JMorado I am not sure, but there are a few things I can think of that might be the issue, but I am not an expert and have not looked through the code, so it might be a bit naive.
mpiexec -n 1 ./lmp -in in.script -k on g 1 t 32 -sf kk -pk kokkos newton on neigh fulljit but I am not sure if it is important or could be affecting performance. I have seen the NequIP devs say that it can usually be silently ignored.
/home/svarner/miniconda3/envs/practicum/lib/python3.10/site-packages/nequip/utils/_global_options.py:70: UserWarning: Setting the GLOBAL value for jit fusion strategy to `[('DYNAMIC', 3)]` which is different than the previous value of `[('STATIC', 2), ('DYNAMIC', 10)]`
warnings.warn(Best, Sam
Linux-cpp-lisp
commented
1 month ago Is there an option to predict a formation energy instead of total energy, or to subtract off per-atom mean energies? That leads to a much smaller output value and better accuracy.
We actually do this internally, at least from develop onward---single precision calculations are done in a more numerically favorable range, and the final energy scalings, shiftings, and sums are done in float64, regardless of the precision of the weights. The final predictions you get should be float64, and if they aren't, something might be off.
Regarding the reproducibility of energies between ASE and OpenMM: you can try turning off TF32, or even better using a fully F64 model (default_dtype: float64 and model_dtype: float64) to ensure that this is just numerics as a sanity check.
Linux-cpp-lisp
commented
1 month ago @svarner9 a few questions on performance:
pair_allegro. This should be more important for smaller models and smaller systems.nequip never silently sets global state when called from someone else's programpeastman
commented
1 month ago There shouldn't be any overhead from Python. The model gets compiled to torchscript, and the simulation gets run by C++ code.
Linux-cpp-lisp
commented
1 month ago Do you call TorchScript from Python here, or directly from C++? Not that I would expect a roundtrip through Python to matter much, just curious.
peastman
commented
1 month ago It's called directly from C++.
JMorado
commented
1 month ago @peastman @Linux-cpp-lisp, I've trained a model with these settings:
default_dtype: float64
model_dtype: float64
allow_tf32: true and the energy and force differences between ASE and OpenMM are indeed very small, on the order of $10^{−10}$, when combined with {"Precision": "double"} in the simulation settings.
Linux-cpp-lisp
commented
1 month ago @JMorado great!
(Note that allow_tf32: true is a no-op when model_dtype: float64 and we should probably error on this configuration, but that doesn't change the results.)
svarner9
commented
1 month ago @svarner9 a few questions on performance:
- What are the actual LAMMPS vs OpenMM numbers? Not sure where they were in this thread.
- Yes, there will be additional Python and doubled neighborlist overhead in OpenMM, both of which are absent in
pair_allegro. This should be more important for smaller models and smaller systems.- You can ignore that particular warning about the fusion strategy safely, it is just there to ensure that
nequipnever silently sets global state when called from someone else's program
@Linux-cpp-lisp I was getting 1.5 ns/day on lammps and 0.2 ns/day on openmm for a system with 645 atoms.
This PR adds in support for NequIP models to openmm-ml. There are no pre-trained models available but the model framework is well defined. This will allow users to use their own trained NequIP models in OpenMM simulations.
Also adds code to compute neighbor lists with pytorch that will be used for MACE models too. (NNPOps neighbor list can be added later)
Addresses #48 and see https://github.com/mir-group/nequip/issues/288 for further discussion.
TODO: Need to add testing but not sure how to do this cleanly in CI considering NequIP needs to be installed via pip