Running time

Question

Running time

zxzhijia opened this issue 9 years ago · 13 comments

How long it takes for running that 60 minutes tutorial example? My CPU is intel i7 3.4 Hz 3.4 Hz. GPU is NVIDIA GeForce GTX 750 Ti.

Answer 1 · 2016-04-13T01:40:22.000Z

it takes a few seconds to a minute ish. shouldn't take longer than that.

Answer 2 · 2016-04-13T02:26:23.000Z

it's really strange. It's been running an hour on my PC. I don't know why.

Answer 3 · 2016-04-13T02:32:01.000Z

I guess I get almost exactly the same problem as tohnperfect got before. He had a long discussion with you. But I don't know how to solve it.

https://github.com/facebook/iTorch/issues/5

Answer 4 · 2016-04-13T02:52:23.000Z

seems slightly different. You asked him how long it takes for commend: itorch; torch.randn(10). He said forever. But mine is very fast. But only "trainer:train(trainset)" takes forever. What's the output of that commend?

Answer 5 · 2016-04-14T01:19:45.000Z

It works fine now when I run it on GPU. Thanks.

Answer 6 · 2016-04-14T01:22:37.000Z

hi Xu, I really suspect now that your CPU torch was not installed with good BLAS support. I suggest checking your output of your torch install and seeing if it links against a blas library.

Answer 7 · 2016-04-14T01:30:55.000Z

Sorry, I'm beginner. how to check that?

On Wednesday, April 13, 2016, Soumith Chintala notifications@github.com
wrote:

hi Xu, I really suspect now that your CPU torch was not installed with
good BLAS support. I suggest checking your output of your torch install and
seeing if it links against a blas library.

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#11 (comment)

Answer 8 · 2016-04-14T01:35:30.000Z

Should I install OpenBLAS?

On Wednesday, April 13, 2016, Xu Zhang xz70@duke.edu wrote:

Sorry, I'm beginner. how to check that?

On Wednesday, April 13, 2016, Soumith Chintala <notifications@github.com
javascript:_e(%7B%7D,'cvml','notifications@github.com');> wrote:

hi Xu, I really suspect now that your CPU torch was not installed with
good BLAS support. I suggest checking your output of your torch install and
seeing if it links against a blas library.

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You are receiving this because you authored the thread.
Reply to this email directly or view it on GitHub
#11 (comment)

Answer 9 · 2016-04-14T03:31:59.000Z

I installed OpenBLAS by your comments in another link.

git clone https://github.com/xianyi/OpenBLAS.git
cd OpenBLAS
make NO_AFFINITY=1 USE_OPENMP=1
sudo make install

But it still doesn't work for CPU. Is anything that may help? Thanks.

Answer 10 · 2016-04-14T03:51:19.000Z

okay good, now that you installed openblas, reinstall just the torch package like this:

export CMAKE_LIBRARY_PATH=/opt/OpenBLAS/include:/opt/OpenBLAS/lib:$CMAKE_LIBRARY_PATH
luarocks install torch

After that, see if things get faster :)

Answer 11 · 2016-04-14T04:18:48.000Z

xu@xu-ThinkCentre-M72e:/$ export CMAKE_LIBRARY_PATH=/opt/OpenBLAS/include:/opt/
xu@xu-ThinkCentre-M72e:/$ OpenBLAS/lib:$CMAKE_LIBRARY_PATH
bash: OpenBLAS/lib:/opt/OpenBLAS/include:/opt/: No such file or directory

Answer 12 · 2016-04-14T04:19:45.000Z

sorry. I type the wrong commend. I'll try again. Thanks.

Answer 13 · 2016-04-14T04:22:39.000Z

Wow. Amazing. Problem solved. Thanks a lot.