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from loguru import logger
import tensorrt as trt
import torch
from torch2trt import torch2trt
from yolox.exp import get_exp
import argparse
import os
import shutil
def make_parser():
parser = argparse.ArgumentParser("YOLOX ncnn deploy")
parser.add_argument("-expn", "--experiment-name", type=str, default=None)
parser.add_argument("-n", "--name", type=str, default=None, help="model name")
parser.add_argument(
"-f",
"--exp_file",
default=None,
type=str,
help="pls input your expriment description file",
)
parser.add_argument("-c", "--ckpt", default=None, type=str, help="ckpt path")
return parser
@logger.catch
def main():
args = make_parser().parse_args()
exp = get_exp(args.exp_file, args.name)
if not args.experiment_name:
args.experiment_name = exp.exp_name
model = exp.get_model()
file_name = os.path.join(exp.output_dir, args.experiment_name)
os.makedirs(file_name, exist_ok=True)
if args.ckpt is None:
ckpt_file = os.path.join(file_name, "best_ckpt.pth.tar")
else:
ckpt_file = args.ckpt
ckpt = torch.load(ckpt_file, map_location="cpu")
# load the model state dict
model.load_state_dict(ckpt["model"])
logger.info("loaded checkpoint done.")
model.eval()
model.cuda()
model.head.decode_in_inference = False
x = torch.ones(1, 3, exp.test_size[0], exp.test_size[1]).cuda()
model_trt = torch2trt(
model,
[x],
fp16_mode=True,
log_level=trt.Logger.INFO,
max_workspace_size=(1 << 32),
)
torch.save(model_trt.state_dict(), os.path.join(file_name, "model_trt.pth"))
logger.info("Converted TensorRT model done.")
engine_file = os.path.join(file_name, "model_trt.engine")
engine_file_demo = os.path.join("deploy", "TensorRT", "cpp", "model_trt.engine")
with open(engine_file, "wb") as f:
f.write(model_trt.engine.serialize())
shutil.copyfile(engine_file, engine_file_demo)
logger.info("Converted TensorRT model engine file is saved for C++ inference.")
if __name__ == "__main__":
main()
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