error: read 0 blocks instead of 1

[yshua5631]

Hello all, I ran into this issue: when i run th waifu2x.lua, the result is images/miku_small_noise_scale.png: 0.69366192817688 sec. when i run th waifu2x.lua -m noise -noise_level 1 -i 1.jpg -o output_image.png, there is an error:

/home/yang/torch/install/bin/luajit: /home/yang/torch/install/share/lua/5.1/torch/File.lua:259: read error: read 0 blocks instead of 1 at /tmp/luarocks_torch-scm-1-7753/torch7/lib/TH/THDiskFile.c:349 stack traceback: [C]: in function 'readInt' /home/yang/torch/install/share/lua/5.1/torch/File.lua:259: in function 'readObject' /home/yang/torch/install/share/lua/5.1/torch/File.lua:409: in function 'load' lib/w2nn.lua:23: in function 'load_model' waifu2x.lua:65: in function 'convert_image' waifu2x.lua:291: in function 'waifu2x' waifu2x.lua:296: in main chunk [C]: in function 'dofile' ...yang/torch/install/lib/luarocks/rocks/trepl/scm-1/bin/th:150: in main chunk [C]: at 0x00405d50

My environment: ubuntu16, cuda8

Can anyone or expert help?

Thanks a lot!

[nagadomi]

I am guessing that is torch side issue or model file is broken. Could you update torch first?

cd ~/torch
git pull
./update.sh

If issue is not solved, check the model file.

% ls -la models/vgg_7/art/noise1_model.t7   
-rw-rw-r-- 1 nagadomi nagadomi 5208717 Jul 21  2016 models/vgg_7/art/noise1_model.t7
% md5sum models/vgg_7/art/noise1_model.t7
fb756ca97d699cbc37d11246f22b3bb0  models/vgg_7/art/noise1_model.t7
% th waifu2x.lua -model_dir models/vgg_7/art -m noise -noise_level 1 -i 1.jpg -o output_image.png
output_image.png: 0.1754138469696 sec   
% th waifu2x.lua -m noise -noise_level 1 -i 1.jpg -o output_image.png 
output_image.png: 0.18308901786804 sec

[yshua5631]

Interesting. Thanks nagadomi @nagadomi . i follow the steps you mentioned. when i run th waifu2x.lua -model_dir models/vgg_7/art -m noise -noise_level 1 -i 1.jpg -o output_image.png, the result is output_image.png: 0.66157102584839 sec.

when i run th waifu2x.lua -m noise -noise_level 1 -i 1.jpg -o output_image.png , the previous error stay the same: /home/yang/torch/install/bin/luajit: /home/yang/torch/install/share/lua/5.1/torch/File.lua:259: read error: read 0 blocks instead of 1 at /home/yang/torch/pkg/torch/lib/TH/THDiskFile.c:349 stack traceback: [C]: in function 'readInt' /home/yang/torch/install/share/lua/5.1/torch/File.lua:259: in function 'readObject' /home/yang/torch/install/share/lua/5.1/torch/File.lua:409: in function 'load' lib/w2nn.lua:23: in function 'load_model' waifu2x.lua:65: in function 'convert_image' waifu2x.lua:291: in function 'waifu2x' waifu2x.lua:296: in main chunk [C]: in function 'dofile' ...yang/torch/install/lib/luarocks/rocks/trepl/scm-1/bin/th:150: in main chunk [C]: at 0x00405d50

By the way, when i run th web.lua , the same error happens.

[nagadomi]

-model_dir option is ./models/upconv_7/art by default. and models/upconv_7/art/nosie1_model.t7 is symbolic link to models/vgg_7/art/noise1_model.t7.

% ls -la models/upconv_7/art/noise1_model.t7 
lrwxrwxrwx 1 nagadomi nagadomi 31 Jul 21  2016 models/upconv_7/art/noise1_model.t7 -> ../../vgg_7/art/noise1_model.t7

so is symbolic link broken? or could not read?

# OK
th waifu2x.lua -model_dir models/vgg_7/art -m noise -noise_level 1 -i 1.jpg -o output_image.png
# Error?
th waifu2x.lua -model_dir models/upconv_7/art -m noise -noise_level 1 -i 1.jpg -o output_image.png 

[yshua5631]

Thanks nagodomi @nagadomi , the reason is symbolic link, i fix it manually by run ln -s /home/yang/study/waifu2x/models/vgg_7/ /home/yang/study/waifu2x/models/upconv_7, it works. I'm wondering that is there any script in waifu2x to create this link?

[nagadomi]

It's created by git clone. Did you download source code from zip archive? Perhaps your zip software does not support symbolic links.

[yshua5631]

@nagadomi Yes, i used zip archive, the reason seems clear now.

[nagadomi]

Thanks for the report. I didn't realize this issue.