TVM darknet yolov3算子优化与量化代码的配置方法
使用以下接口函数
l tvm.relay.optimize
l quantize.quantize
实际代码：
# convert nnvm to relay
print("convert nnvm symbols into relay function...")
#from nnvm.to_relay import to_relay
func, params = to_relay(sym, shape, 'float32', params=params)
# optimization
print("optimize relay graph...")
with tvm.relay.build_config(opt_level=2):
func = tvm.relay.optimize(func, target, params)
# quantize
print("apply quantization...")
from tvm.relay import quantize
with quantize.qconfig():
func = quantize.quantize(func, params)
参考链接：
https://github.com/makihiro/tvm_yolov3_sample/blob/master/yolov3_quantize_sample.py
完全代码如下
早期版本，可以使用新的TVM版本修改。
# Licensed to the Apache Software Foundation (ASF) under one
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# regarding copyright ownership. The ASF licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing,
# software distributed under the License is distributed on an
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
# KIND, either express or implied. See the License for the
# specific language governing permissions and limitations
# under the License.
"""
Compile YOLO-V2 and YOLO-V3 in DarkNet Models
=============================================
**Author**: `Siju Samuel <https://siju-samuel.github.io/>`_
This article is an introductory tutorial to deploy darknet models with TVM.
All the required models and libraries will be downloaded from the internet by the script.
This script runs the YOLO-V2 and YOLO-V3 Model with the bounding boxes
Darknet parsing have dependancy with CFFI and CV2 library
Please install CFFI and CV2 before executing this script
.. code-block:: bash
pip install cffi
pip install opencv-python
"""
# numpy and matplotlib
import numpy as np
import matplotlib.pyplot as plt
import sys
# tvm, relay
import tvm
from tvm import te
from tvm import relay
from ctypes import *
from tvm.contrib.download import download_testdata
from tvm.relay.testing.darknet import __darknetffi__
import tvm.relay.testing.yolo_detection
import tvm.relay.testing.darknet
######################################################################
# Choose the model
# -----------------------
# Models are: 'yolov2', 'yolov3' or 'yolov3-tiny'
# Model name
MODEL_NAME = "yolov3"
######################################################################
# Download required files
# -----------------------
# Download cfg and weights file if first time.
CFG_NAME = MODEL_NAME + ".cfg"
WEIGHTS_NAME = MODEL_NAME + ".weights"
REPO_URL = "https://github.com/dmlc/web-data/blob/main/darknet/"
CFG_URL = REPO_URL + "cfg/" + CFG_NAME + "?raw=true"
WEIGHTS_URL = "https://pjreddie.com/media/files/" + WEIGHTS_NAME
cfg_path = download_testdata(CFG_URL, CFG_NAME, module="darknet")
weights_path = download_testdata(WEIGHTS_URL, WEIGHTS_NAME, module="darknet")
# Download and Load darknet library
if sys.platform in ["linux", "linux2"]:
DARKNET_LIB = "libdarknet2.0.so"
DARKNET_URL = REPO_URL + "lib/" + DARKNET_LIB + "?raw=true"
elif sys.platform == "darwin":
DARKNET_LIB = "libdarknet_mac2.0.so"
DARKNET_URL = REPO_URL + "lib_osx/" + DARKNET_LIB + "?raw=true"
else:
err = "Darknet lib is not supported on {} platform".format(sys.platform)
raise NotImplementedError(err)
lib_path = download_testdata(DARKNET_URL, DARKNET_LIB, module="darknet")
DARKNET_LIB = __darknetffi__.dlopen(lib_path)
net = DARKNET_LIB.load_network(cfg_path.encode("utf-8"), weights_path.encode("utf-8"), 0)
dtype = "float32"
batch_size = 1
data = np.empty([batch_size, net.c, net.h, net.w], dtype)
shape_dict = {"data": data.shape}
print("Converting darknet to relay functions...")
mod, params = relay.frontend.from_darknet(net, dtype=dtype, shape=data.shape)
######################################################################
# Compile the model on NNVM
# -------------------------
# compile the model
local = True
if local:
target = 'llvm'
ctx = tvm.cpu(0)
else:
target = 'cuda'
ctx = tvm.gpu(0)
data = np.empty([batch_size, net.c, net.h, net.w], dtype)
shape = {'data': data.shape}
dtype_dict = {}
# convert nnvm to relay
print("convert nnvm symbols into relay function...")
#from nnvm.to_relay import to_relay
func, params = to_relay(sym, shape, 'float32', params=params)
# optimization
print("optimize relay graph...")
with tvm.relay.build_config(opt_level=2):
func = tvm.relay.optimize(func, target, params)
# quantize
print("apply quantization...")
from tvm.relay import quantize
with quantize.qconfig():
func = quantize.quantize(func, params)
# Relay build
print("Compiling the model...")
print(func.astext(show_meta_data=False))
with tvm.relay.build_config(opt_level=3):
graph, lib, params = tvm.relay.build(func, target=target, params=params)
# Save the model
tmp = util.tempdir()
lib_fname = tmp.relpath('model.tar')
lib.export_library(lib_fname)
# NNVM
# with nnvm.compiler.build_config(opt_level=2):
# graph, lib, params = nnvm.compiler.build(sym, target, shape, dtype_dict, params)
#[neth, netw] = shape['data'][2:] # Current image shape is 608x608
######################################################################
######################################################################
# Import the graph to Relay
# -------------------------
# compile the model
target = tvm.target.Target("llvm", host="llvm")
dev = tvm.cpu(0)
data = np.empty([batch_size, net.c, net.h, net.w], dtype)
shape = {"data": data.shape}
print("Compiling the model...")
with tvm.transform.PassContext(opt_level=3):
lib = relay.build(mod, target=target, params=params)
[neth, netw] = shape["data"][2:] # Current image shape is 608x608
######################################################################
# Load a test image
# -----------------
test_image = "dog.jpg"
print("Loading the test image...")
img_url = REPO_URL + "data/" + test_image + "?raw=true"
img_path = download_testdata(img_url, test_image, "data")
data = tvm.relay.testing.darknet.load_image(img_path, netw, neth)
######################################################################
# Execute on TVM Runtime
# ----------------------
# The process is no different from other examples.
from tvm.contrib import graph_executor
m = graph_executor.GraphModule(lib["default"](dev))
# set inputs
m.set_input("data", tvm.nd.array(data.astype(dtype)))
# execute
print("Running the test image...")
# detection
# thresholds
thresh = 0.5
nms_thresh = 0.45
m.run()
# get outputs
tvm_out = []
if MODEL_NAME == "yolov2":
layer_out = {}
layer_out["type"] = "Region"
# Get the region layer attributes (n, out_c, out_h, out_w, classes, coords, background)
layer_attr = m.get_output(2).numpy()
layer_out["biases"] = m.get_output(1).numpy()
out_shape = (layer_attr[0], layer_attr[1] // layer_attr[0], layer_attr[2], layer_attr[3])
layer_out["output"] = m.get_output(0).numpy().reshape(out_shape)
layer_out["classes"] = layer_attr[4]
layer_out["coords"] = layer_attr[5]
layer_out["background"] = layer_attr[6]
tvm_out.append(layer_out)
elif MODEL_NAME == "yolov3":
for i in range(3):
layer_out = {}
layer_out["type"] = "Yolo"
# Get the yolo layer attributes (n, out_c, out_h, out_w, classes, total)
layer_attr = m.get_output(i * 4 + 3).numpy()
layer_out["biases"] = m.get_output(i * 4 + 2).numpy()
layer_out["mask"] = m.get_output(i * 4 + 1).numpy()
out_shape = (layer_attr[0], layer_attr[1] // layer_attr[0], layer_attr[2], layer_attr[3])
layer_out["output"] = m.get_output(i * 4).numpy().reshape(out_shape)
layer_out["classes"] = layer_attr[4]
tvm_out.append(layer_out)
elif MODEL_NAME == "yolov3-tiny":
for i in range(2):
layer_out = {}
layer_out["type"] = "Yolo"
# Get the yolo layer attributes (n, out_c, out_h, out_w, classes, total)
layer_attr = m.get_output(i * 4 + 3).numpy()
layer_out["biases"] = m.get_output(i * 4 + 2).numpy()
layer_out["mask"] = m.get_output(i * 4 + 1).numpy()
out_shape = (layer_attr[0], layer_attr[1] // layer_attr[0], layer_attr[2], layer_attr[3])
layer_out["output"] = m.get_output(i * 4).numpy().reshape(out_shape)
layer_out["classes"] = layer_attr[4]
tvm_out.append(layer_out)
thresh = 0.560
# do the detection and bring up the bounding boxes
img = tvm.relay.testing.darknet.load_image_color(img_path)
_, im_h, im_w = img.shape
dets = tvm.relay.testing.yolo_detection.fill_network_boxes(
(netw, neth), (im_w, im_h), thresh, 1, tvm_out
)
last_layer = net.layers[net.n - 1]
tvm.relay.testing.yolo_detection.do_nms_sort(dets, last_layer.classes, nms_thresh)
coco_name = "coco.names"
coco_url = REPO_URL + "data/" + coco_name + "?raw=true"
font_name = "arial.ttf"
font_url = REPO_URL + "data/" + font_name + "?raw=true"
coco_path = download_testdata(coco_url, coco_name, module="data")
font_path = download_testdata(font_url, font_name, module="data")
with open(coco_path) as f:
content = f.readlines()
names = [x.strip() for x in content]
tvm.relay.testing.yolo_detection.show_detections(img, dets, thresh, names, last_layer.classes)
tvm.relay.testing.yolo_detection.draw_detections(
font_path, img, dets, thresh, names, last_layer.classes
)
plt.imshow(img.transpose(1, 2, 0))
plt.show()
参考链接：
https://github.com/makihiro/tvm_yolov3_sample/blob/master/yolov3_quantize_sample.py