Yuval Tassa
c7a82c32dc
See changelog herein for motivation and discussion. PiperOrigin-RevId: 797392841 Change-Id: If50e9f09e1d07e8363169d3589c32097aeca2432
267 lines
8.3 KiB
Python
267 lines
8.3 KiB
Python
# Copyright 2025 DeepMind Technologies Limited
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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# ==============================================================================
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"""Tests for forward functions."""
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import functools
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import os
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import tempfile
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from absl.testing import absltest
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from absl.testing import parameterized
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import jax
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import jax.numpy as jp
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import mujoco
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from mujoco import mjx
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from mujoco.mjx._src import io
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from mujoco.mjx._src import test_util
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import mujoco.mjx.warp as mjxw
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from mujoco.mjx.warp import test_util as tu
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from mujoco.mjx.warp import warp as wp # pylint: disable=g-importing-member
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import numpy as np
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try:
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from mujoco.mjx.warp import forward # pylint: disable=g-import-not-at-top
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except ImportError:
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forward = None
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_FORCE_TEST = os.environ.get('MJX_WARP_FORCE_TEST', '0') == '1'
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class ForwardTest(parameterized.TestCase):
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def setUp(self):
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super().setUp()
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if mjxw.WARP_INSTALLED:
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self.tempdir = tempfile.TemporaryDirectory()
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wp.config.kernel_cache_dir = self.tempdir.name
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np.random.seed(0)
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def tearDown(self):
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super().tearDown()
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if hasattr(self, 'tempdir'):
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self.tempdir.cleanup()
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@parameterized.parameters(
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'pendula.xml',
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'humanoid/humanoid.xml',
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)
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def test_jit_caching(self, xml):
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"""Tests jit caching on the full step function."""
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if not _FORCE_TEST:
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if not mjxw.WARP_INSTALLED:
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self.skipTest('Warp not installed.')
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if not io.has_cuda_gpu_device():
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self.skipTest('No CUDA GPU device available.')
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batch_size = 7
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m = test_util.load_test_file(xml)
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mx = mjx.put_model(m, impl='warp')
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keys = jp.arange(batch_size)
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dx_batch = jax.vmap(functools.partial(tu.make_data, m))(keys)
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step_fn = jax.jit(jax.vmap(forward.step, in_axes=(None, 0)))
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dx_batch1 = step_fn(mx, dx_batch)
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jax.tree_util.tree_map(lambda x: x.block_until_ready(), dx_batch1)
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self.assertEqual(step_fn._cache_size(), 1)
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# Re-generate data and run step_fn again to test jit caching.
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keys = jp.arange(batch_size, batch_size * 2)
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dx_batch = jax.vmap(functools.partial(tu.make_data, m))(keys)
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dx_batch2 = step_fn(mx, dx_batch)
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jax.tree_util.tree_map(lambda x: x.block_until_ready(), dx_batch2)
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self.assertEqual(step_fn._cache_size(), 1)
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@parameterized.product(
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xml=(
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'humanoid/humanoid.xml',
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'pendula.xml',
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),
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batch_size=(1, 7),
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)
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def test_forward(self, xml: str, batch_size: int):
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if not _FORCE_TEST:
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if not mjxw.WARP_INSTALLED:
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self.skipTest('Warp not installed.')
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if not io.has_cuda_gpu_device():
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self.skipTest('No CUDA GPU device available.')
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m = test_util.load_test_file(xml)
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m.opt.iterations = 10
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m.opt.ls_iterations = 10
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mx = mjx.put_model(m, impl='warp')
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d = mujoco.MjData(m)
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worldids = jp.arange(batch_size)
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dx_batch = jax.vmap(functools.partial(tu.make_data, m))(worldids)
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dx_batch = jax.jit(jax.vmap(forward.forward, in_axes=(None, 0)))(
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mx, dx_batch
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)
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for i in range(batch_size):
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dx = dx_batch[i]
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d.qpos[:] = dx.qpos
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d.qvel[:] = dx.qvel
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d.ctrl[:] = dx.ctrl
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d.mocap_pos[:] = dx.mocap_pos
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d.mocap_quat[:] = dx.mocap_quat
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mujoco.mj_forward(m, d)
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# fwd_position
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tu.assert_attr_eq(dx, d, 'xpos')
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tu.assert_attr_eq(dx, d, 'xquat')
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tu.assert_attr_eq(dx, d, 'xipos')
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tu.assert_eq(d.ximat.reshape((-1, 3, 3)), dx.ximat, 'ximat')
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tu.assert_attr_eq(dx, d, 'xanchor')
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tu.assert_attr_eq(dx, d, 'xaxis')
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tu.assert_attr_eq(dx, d, 'geom_xpos')
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tu.assert_eq(dx.geom_xmat, d.geom_xmat.reshape((-1, 3, 3)), 'geom_xmat')
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if m.nsite:
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tu.assert_attr_eq(dx, d, 'site_xpos')
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tu.assert_eq(dx.site_xmat, d.site_xmat.reshape((-1, 3, 3)), 'site_xmat')
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tu.assert_attr_eq(dx._impl, d, 'cdof')
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tu.assert_attr_eq(dx._impl, d, 'cinert')
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tu.assert_attr_eq(dx, d, 'subtree_com')
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if m.nlight:
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tu.assert_attr_eq(dx._impl, d, 'light_xpos')
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tu.assert_attr_eq(dx._impl, d, 'light_xdir')
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if m.ncam:
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tu.assert_attr_eq(dx, d, 'cam_xpos')
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tu.assert_eq(dx.cam_xmat, d.cam_xmat.reshape((-1, 3, 3)), 'cam_xmat')
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tu.assert_attr_eq(dx, d, 'ten_length')
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tu.assert_attr_eq(dx._impl, d, 'ten_J')
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tu.assert_attr_eq(dx._impl, d, 'ten_wrapadr')
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tu.assert_attr_eq(dx._impl, d, 'ten_wrapnum')
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tu.assert_attr_eq(dx._impl, d, 'wrap_xpos')
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tu.assert_attr_eq(dx._impl, d, 'wrap_obj')
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tu.assert_attr_eq(dx._impl, d, 'crb')
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if not mx.opt._impl.is_sparse:
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qm = np.zeros((m.nv, m.nv))
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mujoco.mj_fullM(m, qm, d.qM)
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else:
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qm = d.qM
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tu.assert_eq(qm, dx._impl.qM, 'qM')
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# qLD is fused in a cholesky factorize and solve, and not written to.
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tu.assert_contact_eq(d, dx, worldid=i)
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tu.assert_attr_eq(dx._impl, d, 'actuator_length')
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actuator_moment = np.zeros((m.nu, m.nv))
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mujoco.mju_sparse2dense(
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actuator_moment,
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d.actuator_moment,
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d.moment_rownnz,
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d.moment_rowadr,
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d.moment_colind,
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)
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tu.assert_eq(dx._impl.actuator_moment, actuator_moment, 'actuator_moment')
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# fwd_velocity
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tu.assert_attr_eq(dx._impl, d, 'actuator_velocity')
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tu.assert_attr_eq(dx, d, 'cvel')
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tu.assert_attr_eq(dx._impl, d, 'cdof_dot')
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tu.assert_attr_eq(dx._impl, d, 'qfrc_spring')
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tu.assert_attr_eq(dx._impl, d, 'qfrc_damper')
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tu.assert_attr_eq(dx, d, 'qfrc_gravcomp')
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tu.assert_attr_eq(dx, d, 'qfrc_fluid')
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tu.assert_attr_eq(dx, d, 'qfrc_passive')
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tu.assert_attr_eq(dx, d, 'qfrc_bias')
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tu.assert_efc_eq(d, dx, worldid=i)
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# fwd_actuation
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tu.assert_attr_eq(dx, d, 'act_dot')
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tu.assert_attr_eq(dx, d, 'actuator_force')
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tu.assert_attr_eq(dx, d, 'qfrc_actuator')
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# fwd_acceleration
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tu.assert_attr_eq(dx, d, 'qfrc_smooth')
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tu.assert_attr_eq(dx, d, 'qacc_smooth')
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np.testing.assert_allclose(
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dx.qacc, d.qacc, err_msg='qacc', rtol=1e-5, atol=1.0
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)
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class StepTest(parameterized.TestCase):
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def setUp(self):
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super().setUp()
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if mjxw.WARP_INSTALLED:
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self.tempdir = tempfile.TemporaryDirectory()
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wp.config.kernel_cache_dir = self.tempdir.name
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np.random.seed(0)
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def tearDown(self):
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super().tearDown()
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if hasattr(self, 'tempdir'):
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self.tempdir.cleanup()
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@parameterized.product(
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xml=(
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'humanoid/humanoid.xml',
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'pendula.xml',
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),
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batch_size=(1, 7),
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)
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def test_step(self, xml: str, batch_size: int):
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if not _FORCE_TEST:
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if not mjxw.WARP_INSTALLED:
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self.skipTest('Warp not installed.')
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if not io.has_cuda_gpu_device():
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self.skipTest('No CUDA GPU device available.')
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m = test_util.load_test_file(xml)
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m.opt.iterations = 10
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m.opt.ls_iterations = 10
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mx = mjx.put_model(m, impl='warp')
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d = mujoco.MjData(m)
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worldids = jp.arange(batch_size)
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dx_batch = jax.vmap(functools.partial(tu.make_data, m))(worldids)
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dx_batch_orig = dx_batch
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for _ in range(10):
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dx_batch = jax.jit(jax.vmap(forward.step, in_axes=(None, 0)))(
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mx, dx_batch
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)
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for i in range(batch_size):
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dx = dx_batch[i]
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dx_orig = dx_batch_orig[i]
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d.qpos[:] = dx_orig.qpos
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d.qvel[:] = dx_orig.qvel
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d.ctrl[:] = dx_orig.ctrl
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d.mocap_pos[:] = dx_orig.mocap_pos
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d.mocap_quat[:] = dx_orig.mocap_quat
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d.time = dx_orig.time
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mujoco.mj_step(m, d, 10)
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tu.assert_attr_eq(dx, d, 'qpos')
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tu.assert_attr_eq(dx, d, 'qvel')
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tu.assert_attr_eq(dx, d, 'time')
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tu.assert_attr_eq(dx, d, 'ctrl')
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tu.assert_attr_eq(dx, d, 'act')
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tu.assert_attr_eq(dx, d, 'mocap_pos')
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tu.assert_attr_eq(dx, d, 'mocap_quat')
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tu.assert_attr_eq(dx, d, 'sensordata')
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if __name__ == '__main__':
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absltest.main()
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