added primitive joblib launcher

examples/mujoco/joblib_launcher.py

@@ -0,0 +1,35 @@
+from dataclasses import asdict, dataclass
+from typing import Literal
+
+from joblib import Parallel, delayed
+
+from tianshou.highlevel.experiment import Experiment
+
+
+@dataclass
+class JoblibConfig:
+    n_jobs: int = -1
+    """The maximum number of concurrently running jobs. If -1, all CPUs are used."""
+    backend: Literal["loky", "multiprocessing", "threading"] | None = None
+    """Allows to hard-code backend, otherwise inferred based on prefer and require."""
+    verbose: int = 10
+    """If greater than zero, prints progress messages."""
+
+
+class JoblibLauncher:
+    def __init__(self, joblib_cfg: JoblibConfig) -> None:
+        self.joblib_cfg = joblib_cfg
+        # Joblib's backend is hard-coded to loky since the threading backend produces different results
+        self.joblib_cfg.backend = "loky"
+
+    def launch(self, experiments: dict[str, Experiment]) -> None:
+        Parallel(**asdict(self.joblib_cfg))(
+            delayed(self.execute_task)(exp, exp_name) for exp_name, exp in experiments.items()
+        )
+
+    @staticmethod
+    def execute_task(exp: Experiment, name: str):
+        try:
+            exp.run(name)
+        except Exception as e:
+            print(e)

examples/mujoco/mujoco_ppo_hl_multi.py

@@ -1,13 +1,16 @@
 #!/usr/bin/env python3
 
 import os
+import sys
 from collections.abc import Sequence
 from typing import Literal
 
 import torch
 
+from examples.mujoco.joblib_launcher import JoblibConfig, JoblibLauncher
 from examples.mujoco.mujoco_env import MujocoEnvFactory
 from tianshou.highlevel.config import SamplingConfig
+from tianshou.highlevel.env import VectorEnvType
 from tianshou.highlevel.evaluation import RLiableExperimentResult
 from tianshou.highlevel.experiment import (
     ExperimentConfig,
@@ -49,6 +52,7 @@ def main(
     value_clip: bool = False,
     norm_adv: bool = False,
     recompute_adv: bool = True,
+    run_sequential: bool = False,
 ) -> str:
     """Use the high-level API of TianShou to evaluate the PPO algorithm on a MuJoCo environment with multiple seeds for
     a given configuration. The results for each run are stored in separate sub-folders. After the agents are trained,
@@ -75,6 +79,9 @@ def main(
         train_seed=sampling_config.train_seed,
         test_seed=sampling_config.test_seed,
         obs_norm=True,
+        venv_type=VectorEnvType.SUBPROC_SHARED_MEM_FORK_CONTEXT
+        if sys.platform == "darwin"
+        else VectorEnvType.SUBPROC_SHARED_MEM,
     )
 
     experiments = (
@@ -105,8 +112,12 @@ def main(
         .build_default_seeded_experiments(num_experiments)
     )
 
-    for experiment_name, experiment in experiments.items():
+    if run_sequential:
-        experiment.run(experiment_name)
+        for experiment_name, experiment in experiments.items():
+            experiment.run(experiment_name)
+    else:
+        launcher = JoblibLauncher(JoblibConfig())
+        launcher.launch(experiments)
 
     return log_name
 

poetry.lock

@@ -2133,6 +2133,17 @@ MarkupSafe = ">=2.0"
 [package.extras]
 i18n = ["Babel (>=2.7)"]
 
+[[package]]
+name = "joblib"
+version = "1.3.2"
+description = "Lightweight pipelining with Python functions"
+optional = true
+python-versions = ">=3.7"
+files = [
+    {file = "joblib-1.3.2-py3-none-any.whl", hash = "sha256:ef4331c65f239985f3f2220ecc87db222f08fd22097a3dd5698f693875f8cbb9"},
+    {file = "joblib-1.3.2.tar.gz", hash = "sha256:92f865e621e17784e7955080b6d042489e3b8e294949cc44c6eac304f59772b1"},
+]
+
 [[package]]
 name = "json5"
 version = "0.9.14"
@@ -6892,7 +6903,7 @@ atari = ["ale-py", "autorom", "opencv_python", "shimmy"]
 box2d = ["box2d_py", "pygame", "swig"]
 classic-control = ["pygame"]
 envpool = ["envpool"]
-eval = ["rliable"]
+eval = ["joblib", "rliable"]
 mujoco = ["imageio", "mujoco"]
 mujoco-py = ["cython", "mujoco-py"]
 pybullet = ["pybullet"]
@@ -6902,4 +6913,4 @@ vizdoom = ["vizdoom"]
 [metadata]
 lock-version = "2.0"
 python-versions = "^3.11"
-content-hash = "0ac399a139f7e0e64f481823d6f079a385676abf4836d1b532bd0cb86589c66e"
+content-hash = "bb0c689d4db6fe4de11d6bd55fe9fd4425739ef9a603ec5bd57f2c48e0ada9c7"

pyproject.toml

@@ -58,6 +58,7 @@ docstring-parser = { version = "^0.15", optional = true }
 envpool = { version = "^0.8.2", optional = true,  markers = "sys_platform != 'darwin'"}
 gymnasium-robotics = { version = "*", optional = true }
 imageio = { version = ">=2.14.1", optional = true }
+joblib = { version = "*", optional = true }
 jsonargparse = {version = "^4.24.1", optional = true}
 mujoco = { version = ">=2.1.5", optional = true }
 mujoco-py = { version = ">=2.1,<2.2", optional = true }
@@ -79,7 +80,7 @@ pybullet = ["pybullet"]
 envpool = ["envpool"]
 robotics = ["gymnasium-robotics"]
 vizdoom = ["vizdoom"]
-eval = ["rliable"]
+eval = ["rliable", "joblib"]
 
 
 [tool.poetry.group.dev]