maoni, Author at .NET Blog

maoni .NET GC Architect, .NET Runtime Team: Loves working on #dotnet #dotnetcore GC and other perf stuff.

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What’s new in GC in CLR 4.5 from our team blog

July 23rd, 2012

This is now live from CLR's team blog. This paints a more complete picture than what I talked about in my "What's new in 4.5 GC" Channel 9 interview which mostly focused on Server Background GC. http://blogs.msdn.com/b/dotnet/archive/2012/07/20/the-net-framework-4-5-includes-new-garbage-collector-enhancements-for-client-and-server-...

So, what’s new in the CLR 4.5 GC?

September 21st, 2011

Last time I posted a "So, what's new" entry was when we release 4.0 ~3 years ago (can't believe it's already been that long..). Now I get to talk about what's new in the 4.5 GC. Actually I just talked about this with Channel 9 and here's the link to the video: https://channel9.msdn.com/posts/Maoni-Stephens-CLR-45-Server-Background-GC...

Finalization Uncovered

November 15th, 2010

I’ve talked about finalization before but based on seeing questions related to it it appears that it deserves some clarification. First of all, finalization is a mechanism we provide in the CLR wheras Dispose is a programming pattern. See Clearing up some confusion over finalization and other areas in GC for an explanation why we ...

Debugging with the Right Tools

April 23rd, 2010

Wow, it’s been almost a year since I last blogged J We just shipped CLR V4.0. Yay! An internal email thread prompted me to write this blog entry – one very powerful tool I wanted to point out when you need to debug/investigate issues is your debugger (if your debugger is also windbg/cdb that is J since that’s what I use and that...

Channel9 Video on Background GC

May 26th, 2009

A couple of weeks back my PM and I did a channel9 video on Background GC. Take a look: https://channel9.msdn.com/shows/Going+Deep/Maoni-Stephens-and-Andrew-Pardoe-CLR-4-Inside-Background-GC...

So, what’s new in the CLR 4.0 GC?

November 19th, 2008

PDC 2008 happened not long ago so I get to write another “what’s new in GC” blog entry. For quite a while now I’ve been working on a new concurrent GC that replaces the existing one. And this new concurrent GC is called “background GC”. First of all let me apologize for having not written anything for so long. It’s been quite ...

64-bit vs 32-bit

May 15th, 2007

As 64-bit machines become more common, the problems we need to solve also evolve. In this post I’d like to talk about what it means for the GC and the applications’ memory usage when we move from 32-bit to 64-bit. One big limitation of 32-bit is the virtual memory address space - as a user mode process you get 2GB, and if you use ...

He’s live… he’s live not… he’s live…

March 21st, 2007

I was making some code changes today and thought this was interesting to share. As you know, the WeakReference class has a getter and a setter method to get and set the Target which is what the weakref points to. See Using GC Efficiently – Part 3 for more details on WeakReference. Note that the code below is only for illustration ...

Difference Between Perf Data Reported by Different Tools – 4

January 12th, 2007

.NET CLR Memory\% Time in GC counter and !runaway on thread(s) doing GC. The 2 common ways people use to look at the time spent in GC are the % Time in GC performance counter under .NET CLR Memory, and the CPU time displayed by the !runaway debugger command in cdb/windbg. What do they mean exactly? % Time in GC is calculated like this: When ...

Difference Between Perf Data Reported by Different Tools – 3

December 20th, 2006

Both the !SOS.gchandles command (added in CLR 2.0) and the .NET CLR Memory\# GC Handles counter show you the number of GC handles you have in your process. The # GC Handles counter is one of the rare counters in the .NET CLR Memory category that doesn’t get updated at the end of each GC. Rather we update it in the handle table code, for ...

maoni

.NET GC Architect, .NET Runtime Team