CTC loss is 0 on GPU Tesla V100

[bjlgcxc]

I get the problem of continuously get zero loss (loss = 0) on GPU Tesla V100，if anyone got the same problem or have some solutions?

[raotnameh]

facing the same problem on longer audios of around 40-60 seconds.
@SeanNaren

[bjlgcxc]

I have solved the problem, just put the input of ctc loss on cpu

for example , CTC(acts, labels, act_lens, label_lens),

do acts.cpu() before run CTC loss

[Stonesjtu]

The ctc loss will return 0 on errors. One is the ctc loss is not compiled with cuda support but got cuda tensor input. Another situation is input sequence is too long.

[IAASSIBLCU]

The ctc loss will return 0 on errors. One is the ctc loss is not compiled with cuda support but got cuda tensor input. Another situation is input sequence is too long.

I also face the same problem. so I want to know how to check the ctc loss is compiled with cuda or not. and, if it really isn't compiled, what can I do to make them compiled. thanks a lot!!!

[raotnameh]

@IAASSIBLCU I would recommend you to try using PyTorch CTC.

[SeanNaren]

I too would also suggest using PyTorch CTC :) this library is fairly old, and I've also moved this project to use it successfully: https://github.com/SeanNaren/deepspeech.pytorch

[IAASSIBLCU]

@raotnameh @SeanNaren thanks a lot!! I will try PyTorch CTC in my project. Hope to get the dream result.