{"id":25661,"date":"2019-12-09T02:33:32","date_gmt":"2019-12-09T09:33:32","guid":{"rendered":"https:\/\/devblogs.microsoft.com\/dotnet\/?p=25661"},"modified":"2021-09-29T12:16:04","modified_gmt":"2021-09-29T19:16:04","slug":"gc-perf-infrastructure-part-1","status":"publish","type":"post","link":"https:\/\/devblogs.microsoft.com\/dotnet\/gc-perf-infrastructure-part-1\/","title":{"rendered":"GC Perf Infrastructure – Part 1"},"content":{"rendered":"

We open sourced<\/a> our new GC Perf Infrastructure! It\u2019s now part of the dotnet performance repo. I\u2019ve been meaning to write about it \u2018cause some curious minds had been asking when they could use it after I blogged about it last time<\/a> but didn\u2019t get around to it till now.<\/p>\n

First of all, let me point out that the target audience of this infra, aside from the obvious (ie, those who make performance changes to the GC), are folks need to do in-depth analysis of GC\/managed memory performance and\/or to build automation around it. So it assumes you already have a fair amount of knowledge what to look for with the analysis.<\/p>\n

Secondly, there are a lot of moving parts in the infra and since it\u2019s still under development I wouldn\u2019t be surprised if you hit problems when you try to use it. Please be patient with us as we work through the issues! We don\u2019t have a whole lot of resources so we may not be able to get to them right away. And of course if you want to contribute it would be most appreciated. I know many people who are reading this are passionate about perf analysis and have done a ton of work to build\/improve perf analysis for .NET, whether in your own tooling or other people\u2019s. And contributing to perf analysis is a fantastic way to learn about GC tuning if you are looking to start somewhere. So I would strongly encourage you to contribute!<\/p>\n

Topology<\/strong><\/p>\n

We discussed whether we wanted to open source this in its own repo and the conclusion we wouldn\u2019t mostly just due to logistics reasons so this became part of the perf repo under the \u201csrc\/benchmarks\/gc<\/a>\u201d directory (which I\u2019ll refer to as the root directory). It doesn’t depend on anything outside of this directory which means you don\u2019t need to build anything outside of it if you just want to use the GC perf infra part.<\/p>\n

The readme.md in the root directory<\/a> describes the general workflow and basic usage. More documentation can be found in the docs<\/a> directory.<\/p>\n

There are 2 major components of the infra \u2013<\/p>\n

Running perf benchmarks<\/font><\/p>\n

This runs our own perf benchmarks \u2013 this is for folks who need to actually make perf changes to the GC. It provides the following functionalities \u2013<\/p>\n