I have a question regarding the Installation of ITensorGPU.
I really struggle to understand which dependencies are required, i.e.
which versions of Julia, Cuda and cuTensor are allowed to run it successfully.
Each time I try to install I run into some version-inconsistencies. I’am using the newest version of Julia (1.10.2).
I further have a question regarding cuTensor.
Is it necessary to download and intsall it from the NVIDIA webpage or is it enough to install the julia cuTensor package?
Ah I just stumbled over the fact, that ITensorGPU will soon be deprecated
and it might be clever to use already NDTensor instead.
I also understood that cuTENSOR is not yet supported, and some operations are still significantly slower than with ITensorGPU.
Is there any planned timeline until the packages will be equivalent in speed?
Best regards
Pia
Could you share examples where the new package extension-based GPU code is slower than ITensorGPU? @kmp5 is looking into adding cuTENSOR support to the new package extension, I would be curious if that accounts for the slowdown or if it is something else.
Hey, thanks for the quick reply.
I don’t have any examples myself yet as I still struggle to install ITensorGPU (but I understood now that I have to use an older ITensor and Julia version).
The aim of my second post was more to understand, whether these assumptions I got from reading through the posts in this forum are correct, and if it is still worth to put effort into installing ITensorGPU
We would hope that you would not have to install ITensorGPU. The only missing feature in the new package extension compared to ITensorGPU that I know of currently is lack of cuTENSOR support, which we are in the process of adding now, but we have seen good speeds without that (though we haven’t done careful comparisons yet). So please try out the new package extension and let us know if you have any issues.
EDIT: In case it is needed (say for comparing performance or using cuTENSOR for the time being), you should be able to install ITensorGPU with using Pkg; Pkg.add("ITensorGPU"). However, note that you can only use ITensorGPU with Julia 1.6 through 1.9, Julia 1.10 and beyond are not and will not be supported.