This is the ninth part of the .NET Inside Out series. For your convenience you can find other parts in the table of contents in Part 1 – Virtual and non-virtual calls in C# We know how to generate delegate from a byte…
This is the fifth part of the Async Wandering series. For your convenience you can find other parts in the table of contents in Part 1 – Why creating Form from WinForms in unit tests breaks async? Last time we saw how to…
This is the eleventh part of the Custom memory allocation series. For your convenience you can find other parts in the table of contents in Part 1 — Allocating object on a stack I presented some results suggesting that UnsafeList is faster than…
This is the tenth part of the Custom memory allocation series. For your convenience you can find other parts in the table of contents in Part 1 — Allocating object on a stack I had .NET Core 2.1.103 x64 installed and I wanted…
This is the ninth part of the Custom memory allocation series. For your convenience you can find other parts in the table of contents in Part 1 — Allocating object on a stack We already hijacked new in C#. Last time we did…
Let’s start with the following code: using System; using System.Windows.Forms; class Program1 { [STAThread] static void Main() { var form = new Form(); form.Load += (sender, e) => throw new Exception(); try { Application.Run(form); } catch(Exception e) { MessageBox.Show(“This doesn’t execute”); } finally…
It sometimes happens that your EMR job crashes or hangs indefinitely with no meaningful log. You can try to capture memory dump but it is not very useful when your cluster machines have hundreds gigabytes of memory each. Below are “fixes” which worked…
When you deploy your package to Amazon Elastic Map Reduce (EMR), you can access the AWS SDK provided by the platform. This gets tricky if you compile your code against different version of SDK because then you may get very cryptic bugs in…
Today we are going to implement trivial ScheduledExecutorService in C#. Introduction We want to have a thread pool of fixed size which we can use to execute three types of tasks: One time tasks Tasks with fixed delay between executions Tasks with fixed…
This is the fourth part of the WRK series. For your convenience you can find other parts in the table of contents in Part 1 — Compiling and debugging To create a new module, you need to prepare some directories and a make…
This is the third part of the WRK series. For your convenience you can find other parts in the table of contents in Part 1 — Compiling and debugging Today we are going to write a very simple hello world in the kernel…
This is the second part of the WRK series. For your convenience you can find other parts in the table of contents in Part 1 — Compiling and debugging In this part we are going to monitor the invocation of QuerySystemInformation system function…
This is the first part of the WRK series. For your convenience you can find other parts using the links below (or by guessing the address): Part 1 – Compiling and debugging Part 2 – Monitoring and function invocation Part 3 — Syscall…
Imagine that you need to load JAR file dynamically in Zeppelin working on your EMR cluster. One easy way is to deploy the file to the instance and load it from there, however, what can you do if you have almost no access…
If you want to declare a class in Zeppelin and create instance of it, you might be surprised: class K defined class K classOf[K].newInstance() java.lang.InstantiationException: K at java.lang.Class.newInstance(Class.java:427) … 52 elided Caused by: java.lang.NoSuchMethodException: K.() at java.lang.Class.getConstructor0(Class.java:3082) at java.lang.Class.newInstance(Class.java:412) … 52 more What…
This is the fiftieth part of the ILP series. For your convenience you can find other parts in the table of contents in Part 1 – Boolean algebra Today we are going to solve three graph problems: vinimum spanning tree, vertex cover and…
This is the eighth part of the Custom memory allocation series. For your convenience you can find other parts in the table of contents in Part 1 — Allocating object on a stack Today we are going to revisit an Unsafe list example…
Can one line of code in C# JIT compile into two different blocks of code in the same program? This sounds a little tricky but in fact is very easy and happens pretty often. Consider the following code: using System; namespace Reordering {…
This is the seventh part of the Custom memory allocation series. For your convenience you can find other parts in the table of contents in Part 1 — Allocating object on a stack We know how to allocate object on a stack, however,…
This is the sixth part of the Concurrency series. For your convenience you can find other parts in the table of contents in Part 1 – Mutex performance in .NET Let’s start with the following code: using System; using System.Threading; namespace AbandonedMutex {…
Posts
- .NET Inside Out Part 9 — Generating Func from a bunch of bytes in C# revisited October 13, 2018
- Async Wandering Part 5 — Catching exceptions from async void October 6, 2018
- Custom memory allocation in C# Part 11 — Benchmarking UnsafeList September 29, 2018