| from pathlib import Path |
| import sys,os,numpy as np,torch |
| import torch.distributed as dist |
| from torch.nn.parallel import DistributedDataParallel as DDP |
| ROOT=Path(__file__).resolve().parents[1];sys.path.insert(0,str(ROOT)) |
| from model.weatherbench import * |
| c=load_config(ROOT);rank=int(os.getenv("RANK",0));world=int(os.getenv("WORLD_SIZE",1));distributed=world>1 |
| if distributed:dist.init_process_group("gloo") |
| torch.manual_seed(c["seed"]);d=np.load(ROOT/c["data"]["path"]);ids=np.where(d["split"]==0)[0];base=WeatherBenchCNN(**c["model"]);m=DDP(base) if distributed else base;opt=torch.optim.Adam(m.parameters(),lr=c["train"]["learning_rate"]);losses=[] |
| for _ in range(c["train"]["epochs"]): |
| for i in ids[rank::world]:x=torch.tensor(d["input"][i:i+1]);y=torch.tensor(d["target_6h"][i:i+1]);loss=((m(x)-y)**2).mean();opt.zero_grad();loss.backward();opt.step();losses.append(float(loss)) |
| v=torch.tensor([sum(losses),len(losses)],dtype=torch.float64) |
| if distributed:dist.all_reduce(v) |
| p=ROOT/c["paths"]["checkpoint"] |
| if rank==0:p.parent.mkdir(parents=True,exist_ok=True);torch.save({"model":base.state_dict(),"model_config":c["model"]},p);write_json(ROOT/c["paths"]["training_metrics"],{"mse":float(v[0]/v[1]),"world_size":world});print(p) |
| if distributed:dist.destroy_process_group() |
|
|
