Created
December 23, 2020 22:55
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# script | |
import torch | |
import torch.nn as nn | |
import torch.nn.quantized as nnq | |
m = nn.Sequential(nn.Conv2d(1, 1, 1)) | |
m.qconfig = torch.quantization.get_default_qat_qconfig('qnnpack') | |
mp = torch.quantization.prepare_qat(m) | |
print('prepared model', mp) | |
mp(torch.randn(4, 1, 4, 4)) | |
mq = torch.quantization.convert(mp) | |
print('quantized model', mq) | |
print('prepared parameters') | |
print(list(mp.named_parameters())) | |
print('quantized packed parameters') | |
for name, mod in mq.named_modules(): | |
if isinstance(mod, nnq.Conv2d): | |
weight, bias = mod._weight_bias() | |
print(name, 'weight', weight, 'bias', bias) | |
# output | |
prepared model Sequential( | |
(0): Conv2d( | |
1, 1, kernel_size=(1, 1), stride=(1, 1) | |
(weight_fake_quant): FakeQuantize( | |
fake_quant_enabled=tensor([1], dtype=torch.uint8), observer_enabled=tensor([1], dtype=torch.uint8), quant_m | |
in=-128, quant_max=127, dtype=torch.qint8, qscheme=torch.per_tensor_symmetric, ch_axis=-1, scale=tensor([1.]), ze | |
ro_point=tensor([0]) | |
(activation_post_process): MovingAverageMinMaxObserver(min_val=inf, max_val=-inf) | |
) | |
(activation_post_process): FakeQuantize( | |
fake_quant_enabled=tensor([1], dtype=torch.uint8), observer_enabled=tensor([1], dtype=torch.uint8), quant_m | |
in=0, quant_max=255, dtype=torch.quint8, qscheme=torch.per_tensor_affine, ch_axis=-1, scale=tensor([1.]), zero_po | |
int=tensor([0]) | |
(activation_post_process): MovingAverageMinMaxObserver(min_val=inf, max_val=-inf) | |
) | |
) | |
) | |
quantized model Sequential( | |
(0): QuantizedConv2d(1, 1, kernel_size=(1, 1), stride=(1, 1), scale=0.006431101355701685, zero_point=109) | |
) | |
prepared parameters | |
[('0.weight', Parameter containing: | |
tensor([[[[0.4274]]]], requires_grad=True)), ('0.bias', Parameter containing: | |
tensor([0.1753], requires_grad=True))] | |
quantized packed parameters | |
0 weight tensor([[[[0.4257]]]], size=(1, 1, 1, 1), dtype=torch.qint8, | |
quantization_scheme=torch.per_tensor_affine, scale=0.0033521773293614388, | |
zero_point=0) bias tensor([0.1753], requires_grad=True) |
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