2017-09-10 Update: Uncomplicate Neanderthal

This weekend I made another attempt at some numeric programming. I have been working on a Clojure library named Neanderthal. It can use CUDA, OpenCL or native libraries. Instead of using BLAS and LAPACK for native libraries, it uses the Intel Math Kernel Library.

In order to use the native library, I installed the Intel MKL library. I did have a bit of trouble with the library. This worked:

export LD_LIBRARY_PATH=/home/ericm/intel/compilers_and_libraries_2017.4.196/linux/mkl/lib/intel64_lin/

For some reason, the “export” had to be on the front. I tried without, and I got an error. But I was able to copy and paste the code from the native example here.

I was able to get the code running from the first OpenCL example.

These are some packages I installed to get the OpenCL example to work:

aptitude install ocl-icd-opencl-dev
aptitude install dkms
aptitude install beignet-opencl-icd

I will also look at TensorFlow. There are a few libraries that let you use Clojure.

2017-12-21_01.25.32 update: Based on an email from the library author on the mailing list, this is how you run the native tests and skip the CUDA/OpenGL tests:

Just run mkl_test namespace. Note: these are mije tests, so for example in Leiningen:

lein midje uncomplicate.neanderthal.mkl_test

Or, with the REPL running, just evaluate mkl_test namespace.

You’re welcome.

2017-08-27 Update

This week I finally got done with chapter 2 of Programming Kotlin.

IntelliJ IDEA sometimes takes a while to start up; at least it feels like it takes a while. Downloading Kotlin for the first time was a very slow process. So far it is a pretty interesting language. I am still not ready to make Android apps with it. I do think that Kotlin might wind up being the replacement for Java, despite what the Scala crowd thinks. Languages that look like a cat walked across your keyboard have limited appeal.

If I use Kotlin, it might just be for Android and command line apps. On the Kotlin site, there is a page recommending books to learn Kotlin. According to its table of contents, the one for using Kotlin for web development spends a LOT of time on JavaScript. JavaScript is also used for mobile apps. I really really do not like JavaScript. It is like a cancer that infects everything. And, yes, I know there is KotlinJS. There is also ClojureScript. And TypeScript. And Elm. And CoffeeScript. And BucketScript. And Dart. And the original wrapper, GWT. If JavaScript is so wonderful, why don’t people just use it directly? Why are there all these wrapper languages around it? That is in addition to the myriad of frameworks and libraries that all do the same things as the frameworks and libraries that JS developers were using last month. Instead of taking the Pragmatic Programmer advice of learning a new language every year, the JS community finds a new way of doing the same thing every six months.

Anyway, no progress on Scheme or Clojure. My future at my current company is still uncertain, so I might need to get back to Clojure.

I also spent some time trying to move my iptables firewall scripts to nftables. I found a page with some tools to convert, but I think some of them are available on straight Debian, but not Ubuntu. It looks like I will have to write them by hand. iptables is pretty obtuse. Many people do not deal with it directly. (Kind of like Javascript.) They make the scripts in admin panels, or they use ufw or shorewall. I used fwbuilder, but that is no longer maintained.

You’re welcome.

2017-08-20 Update

Not a whole lot to report.

I am still going slowly through Simply Scheme, and also Programming Kotlin by Stephen Samuel and Stefan Bocutiu.

I tried Kotlin koans, but frankly I don’t learn a language well with koans. I started the book on Kotlin and Android because the local Android meetup covered the first ten chapters at the beginning of the month. But going through that was kind of rough because I don’t know much about Kotlin or Android.

I should probably stick to one thing to make progress. I found out my project at work will be ending soon, so either I have to find a new project or a whole new company.

 

You’re welcome.

Computer Names

I have going through backup CDs and DVDs lately. Some of the files were tar files. The names of the tar files had names of my computers as part of them. I have had a lot of computers over the past decade, desktops and laptops, running Linux and Windows.

Here are some of the computer names that I found:

  • Juarez
  • Freecity
  • Jolene
  • Saigon
  • Washington
  • Duain
  • Finance
  • Rebirth
  • Slick
  • Latitude

You’re welcome.

2017-08-01 Update

Not a whole lot of news on the programming/technology front this week.

I am trying to clean up my place. I have a box of DVDs and CDs with data back ups, camera pix, git projects and all sorts of stuff on them. An external drive could store all that and take up a lot less space, so I have been copying all the disks to the external drive while binge-watching shows online.

Hopefully more Kotlin progress soon.

You’re welcome.

2017-07-24 Update

I got a book on Android and Kotlin by a guy in Spain named Antonio Leiva. I started going through it. I don’t know too much Kotlin or much about Android, do it is a bit of a hard slog sometimes. Here is his github repo for the book. The Android meetup will have a meeting about it on August 1. I plan on being ready.

I have to learn more about Android. What is an Activity? What is an Adapter? I will have to figure this out.

Here is the Android javadoc.

I think Kotlin will be huge. I think making Kotlin an official Android language will change the JVM language landscape. I have a feeling I will not be doing a lot of Groovy in the future.

When Ceylon came out, I did not see what the point of it was. It did not fill a niche that was not filled by Java, Groovy Clojure or Scala. So another JVM language gaining momentum is a bit surprising.

You’re welcome.

2017-07-16 Update

I took a couple of weeks off from work, so I did not get much done over the past two weeks.

At my company, “vacations” is now “PTO”: paid time off. I have noticed a few people I know at other companies who also use this terminology. When did “vacation” get replaced with a corporate term?

Anyway, I did go to the local Processing meetup. I did not stay the whole time. I noticed I did not have my wallet, so I left early to go look for it. It turns out I just left it at home.

I did a bit with Simply Scheme. I am now on chapter 6. I am wondering if/when I will get the “Lisp enlightenment” that will make me better in all things CS. It looks like there are things you can do in Scheme and Lisp that are just impossible in other languages. We shall see.

I did spend some time on the Groovy Email Server. I am keeping track of the ip addresses and host names of all incoming requests. I might be able to put this to good use someday.

You’re welcome.

2017-06-25 Update

Not a whole lot to report this week. Still working on Simply Scheme. Perhaps I should call it Slowly Scheme.

I decided that this website could use a bit sprucing up, perhaps some pictures. So I am looking at a Java app called Processing that does visual stuff. I think some people use it as a CAD tool, while other people use it to make generative art (abstract art, patterns, fractals, etc).

You’re welcome.

2017-06-11 Update

Not too much to report. I am getting back into Simply Scheme again. I guess my desire for enlightenment got the upper hand.

I ran into the same issue with the Kotlin koans as I did with 4Clojure: I am just going through the API docs searching for something that looks like it might be the answer. That to me gets really frustrating. I found a site by a guy named Antonio Leiva who will send 30 free lessons to you via email about Kotlin. I will let those pile up and go through those. Kotlin isn’t like Scheme’s R7RS, where you can list all the functions on one page.

You’re welcome.

2017-06-04 Update

This week there was not much work on Clojure or Simply Scheme, or even as much Kotlin as I would have liked.

Around mid-week, I had some problems with my mail server. This is the mail server I am running (an instance of Apache James), and not the mail server I am writing. James first puts messages into a spool table and decides what to do with them from there, and that had filled up to the capacity of my VPS account.

I had to delete the DB and uninstall MySQL. I had problems re-installing it, so I installed Postgres. So far it is working out okay. I still got a lot of records in my spool table and a lot of files of 1 GB. I cleared out my spool table by eliminating any records that were not to any users in the domains that I manage, restarted, and things seemed okay. I will have to learn more about the write-ahead log in Postgres.

I had backups for my blogs, and I reinstalled MySQL (as you can tell since you are reading this). I had thought about abandoning MySQL altogether and going with a static site generator. I looked a bit at Cryogen, a static site generator in Clojure, and decided against it. It looks like you cannot have too many nested directories. This blog has 537 posts and 12 pages. I don’t want to deal with too many files in a directory. I would at least like a different directory for each year. I will have a look at JBake as well. I would like to stick to the JVM if possible.

I might also give another go at porting WordPress. There is a program called pgLoader (written in Common Lisp) that can migrate different data stores (including MySQL) to Postgres. Perhaps I will make it a Luminus app.

You’re welcome.