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Performance - .NET Blog

ConfigureAwait FAQ

December 11, 2019 Dec 11, 2019 12/11/19
Stephen Toub - MSFT
.NET added / to the languages and libraries over seven years ago. In that time, it's caught on like wildfire, not only across the .NET ecosystem, but also being replicated in a myriad of other languages and frameworks. It's also seen a ton of improvements in .NET, in terms of additional language constructs that utilize asynchrony, APIs ...

An Introduction to System.Threading.Channels

December 11, 2019 Dec 11, 2019 12/11/19
Stephen Toub - MSFT
"Producer/consumer" problems are everywhere, in all facets of our lives. A line cook at a fast food restaurant, slicing tomatoes that are handed off to another cook to assemble a burger, which is handed off to a register worker to fulfill your order, which you happily gobble down. Postal drivers delivering mail all along their routes, and you ...

GC Perf Infrastructure – Part 1

December 9, 2019 Dec 9, 2019 12/9/19
maoni
We open sourced our new GC Perf Infrastructure! It’s now part of the dotnet performance repo. I’ve been meaning to write about it ‘cause some curious minds had been asking when they could use it after I blogged about it last time but didn’t get around to it till now. First of all, let me point out that the target audience of this ...

GC Perf Infrastructure – Part 0

September 9, 2019 Sep 9, 2019 09/9/19
maoni
In this blog entry and some future ones I will be showing off functionalities that our new GC perf infrastructure provides. Andy and I have been working on it (he did all the work; I merely played the consultant role). We will be open sourcing it soon and I wanted to give you some examples of using it and you can add these to your repertoire ...

Hardware Intrinsics in .NET Core

September 3, 2019 Sep 3, 2019 09/3/19
Tanner Gooding [MSFT]
Several years ago, we decided that it was time to support SIMD code in .NET. We introduced the System.Numerics namespace with , , , , and related types. These types expose a general-purpose API for creating, accessing, and operating on them using hardware vector instructions (when available). They also provide a software fallback for when...

Making CPU configuration better for GC on machines with > 64 CPUs

April 3, 2019 Apr 3, 2019 04/3/19
maoni
If you are running Windows on a machine with > 64 CPUs, you’ll need to use this feature called the CPU groups for your process to be able to use more than 64 CPUs. At some point in the far distant past, people thought having more than 64 processors on a machine was inconceivable so they used a 64-bit number for the processor mask. And when ...

You Should Never See This Callstack in Production

October 9, 2018 Oct 9, 2018 10/9/18
maoni
A customer who just experienced some server outage asked us for help as they thought it was due to some very long GC pauses. I thought this diagnostics exercise might be useful for other folks as well so I am sharing it with you. We had them collect a GCCollectOnly trace which showed there were some very long induced gen2 blocking GCs. And ...

Middle Ground between Server and Workstation GC

October 2, 2018 Oct 2, 2018 10/2/18
maoni
A long time ago I wrote about using Workstation GC on server applications when you have many instances of your server app running on the same machine. By default Server GC will treat the process as owning the machine so it uses all CPUs to do the GC work. More and more folks find themselves in a situation where they might have a few active ...

GLAD is available

September 19, 2016 Sep 19, 2016 09/19/16
maoni
GC ETW series - GC ETW Events - Part 1 GC ETW Events - Part 2 GC ETW Events - Part 3 GC ETW Events - Part 4 Processing GC ETW Events Programmatically with the GLAD Library (this post) End of last year I mentioned we wanted to provide an API for you to really investigate GC/managed memory related performance called GLAD. ...