source benchmarks/train_loop.sh ALGOS="ppo" ENVS="HalfCheetahBulletEnv-v0 AntBulletEnv-v0 HopperBulletEnv-v0 Walker2DBulletEnv-v0" BENCHMARK_MAX_PROCS="${BENCHMARK_MAX_PROCS:-3}" train_loop $ALGOS "$ENVS" | xargs -I CMD -P $BENCHMARK_MAX_PROCS bash -c CMD