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StationQ / Liquid

The Language-Integrated Quantum Operations (LIQUi|>) Simulator
http://StationQ.github.io/Liquid
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Question about __QWalk running on Mac #43

Closed svenegas closed 7 years ago

svenegas commented 7 years ago

Dear All,

I am a Mac user and I want to run some experiments/simulations using QWalk(). I understand that a BLAS library is needed in order to run QWalk() and that uploading BLAS on Liquid is only available on Windows.

I have executed the command mono Liquid.exe "QWalk(x)" where x is a valid parameter and I have certainly obtained some results. For instance, I ran mono Liquid.exe "QWalk(tree)" and the results I got have been attached to this message (Liquid.log.txt file) Liquid.log.txt

My question is: I do not know if running QWalk() without a BLAS libray actually has a negative impact (that is, errors) on the results I get. Would you please be so kind as to share with me anything you know about the accuracy of running QWalk() without a BLAS library?

Thank you very much in advance!

Salvador E. Venegas-Andraca

alan-geller commented 7 years ago

@svenegas BLAS isn't required to run __QWalk. It is only used to compute page rank.

You should see a line in your output with a message something like: loadBLAS Failed: Unable to LoadLibrary(libopenblas.dll): 0x........ [A required library was not found]

This prevents Liquid from performing the page rank calculation, but everything else should work fine.

svenegas commented 7 years ago

Thank you very much indeed for your reply, alan-geller.

I have borrowed a Windows machine, I have downloaded OpenBLAS-v0.2.19-Win64-int32 and have copied libopenblas.dll in c:\Liquid\bin

Now, I get an error message asking for libgcc_s_seh-1.dll and I do not know what to do. I am not acquainted with OPENBLAS installation or usage. Would it be possible to have access to a step-by-step guide to install and run OPENBLAS?

Thank you very much in advance,

Salvador

alan-geller commented 7 years ago

@svenegas There is some information on BLAS the Getting Started page: https://github.com/StationQ/Liquid/blob/master/GettingStarted.md#blas-optional.

svenegas commented 7 years ago

Sorry for the delay in my reply, I have been having fun with BLAS :) Thank you very much for your help, I appreciate it.

Best,

Salvador