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Maoni's WebLog

CLR Garbage Collector

Last Build Date: Thu, 18 May 2017 18:43:24 +0000


Cloud Gal interview

Thu, 18 May 2017 18:43:24 +0000

Microsoft recently started a new series called “Cloud Gal” that promotes female software developers. They interviewed me last week and the episode just became live on Channel9. This was supposed to be pretty lighthearted so I stayed very high level when I talked about GC (turned out it was harder to talk on such high...

No GCs for your allocations?

Sun, 02 Apr 2017 01:33:22 +0000

Several people mentioned Java’s “no GC” GC proposal and asked if we can add such a thing. So I thought it deserves a blog post. Short answer – we already have such a feature and that’s called the NoGCRegion. The GC.TryStartNoGCRegion API allows you to tell us the amount of allocations you’d like to do...

How to evaluate info you read on garbage collectors

Sat, 18 Feb 2017 00:26:08 +0000

Just a word before I actually start this blog entry – I apologize for approving some of the comments so late – it appears that our blogs’ policy has changed and it would make some comments as pending without obvious reasons to me. Also as one of the ways to support the community I was...

GLAD is available

Mon, 19 Sep 2016 21:16:42 +0000

End of last year I mentioned we wanted to provide an API for you to really investigate GC/managed memory related performance called GLAD. Well, the source finally got opened source on github. So GLAD is available. The repo is called PerfView but you actually just need the TraceEvent project (but it’s much easier to just...

Working through things on other OSs

Sat, 02 Jul 2016 00:05:19 +0000

We just shipped CoreCLR 1.0. That was a significant milestone for us – now we officially run on non Windows OSs and that’s very exciting. Folks who told me that they really missed using C# or wanted to use C# but couldn’t because they were not using Windows can now do so. Yay! For GC...

Large Object Heap Uncovered (an old MSDN article)

Tue, 31 May 2016 19:17:17 +0000

I wrote this article in 2008 and the MSDN website no longer has it so I am making it available here. Please note that it has been quite a while and some things related to LOH have changed quite a bit. See the GC ETW blog entries I wrote for the current tooling options. Also note that...

Job support in the GC

Mon, 23 May 2016 23:54:13 +0000

I’ve noticed that more and more of our customers started to use job objects to restrict some form of resources for their processes such as CPU and memory. So I wanted to talk about the kind of support the GC offers to help with your managed processes running in a job object. The first thing...

On.NET show

Fri, 20 May 2016 23:27:21 +0000

So apparently CLR has this show on YouTube called On.NET which I was not aware of till yesterday. In any case, I have been invited on the show for the next episode which is 10am-11am next Thursday (05/26). This is streaming on YouTube so you can ask questions during the air time. So if you do have...

Are you GLAD?

Fri, 20 Nov 2015 17:58:00 +0000

Holidays are almost upon us. Last year around Christmas time I wrote a set of GC ETW blog entries to help with diagnosing GC heap related issues. This year I want to discuss taking that a (big) step further and making an SDK that does the analysis for you using these ETW events – so...

Gen2 free list changes in CLR 4.6 GC

Wed, 12 Aug 2015 17:11:38 +0000

I wanted to mention this because I started seeing posts about it. In 4.6 we improved the way we use the gen2 free list to promote gen1 survivors into. Unfortunately there was a perf bug that I didn’t notice till it was fairly late so it wasn’t approved to be checked into 4.6 at the...