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April 2005 - Posts

Vacation Time

Posted Wednesday, April 13, 2005 8:35 PM by scarroll
I'll be on vacation for the next two weeks. I promise to be a good little blogger and write more posts about the profiler when I return. If you happen to be in Italy and see a hopeless looking Yank muttering in pidgin Italian trying to order gelato, that Read More...
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Profiling FAQ #4: The top sampled function is [ntdll.dll], now what do I do?!

Posted Wednesday, April 13, 2005 8:20 PM by scarroll
One of our big missions here in VS Profiler land is to bring profiling tools to people who maybe haven't had access to one before. I know before I started here, I never really needed to use the Microsoft Symbol Server. However, for the profiler in sampling Read More...
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Profiling FAQ #3: How do -exclude and -include on vsinstr differ from -start / -suspend / -resume, etc.

Posted Wednesday, April 13, 2005 7:53 PM by scarroll
VSinstr has two different categories of switches. The first category of switches control which methods get instrumented. The second category of switches control whether or not profiling collection is enabled or not. They are completely orthogonal. Collection Read More...
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Paper Summary #2: Where the Bugs Are

Posted Wednesday, April 13, 2005 7:30 PM by scarroll
Who wrote it: Thomas J. Ostrand, Elaine J. Weyuker, Robert M. Bell from ATT Labs - Research What's it called: Where the Bugs Are Where was it published: ISSTA 2004 Background: Another really interesting area of research to us Team System folks is predicting Read More...
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Paper Summary #1: Efficient and Precise Dynamic Impact Analysis Using Execute-After Sequences

Posted Sunday, April 10, 2005 9:51 PM by scarroll
What's the name of the paper? Efficient and Precise Dynamic Impact Analysis Using Execute-After Sequences [PDF] Who wrote it? Taweesup Apiwattanapong, Alessandro Orso, and Mary Jean Harrold at Geogia Tech. Background: Impact Analysis is a pretty interesting Read More...
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New Category: Research

Posted Sunday, April 10, 2005 9:39 PM by scarroll
So I'm going to try to add a new category of posts to this blog for interesting papers in Computer Science related conferences and journals. One thing that kind of blows my mind about CS lately is that even though we are more "connected" than we have Read More...
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Profiling FAQ #2: Why am I seeing functions from DLLs I didn't instrument in my Function view?

Posted Friday, April 08, 2005 2:26 PM by scarroll
This is actually just a corollary of the "Why don't instrumentation and sampling calltrees look the same" FAQ. In instrumentation, you will see all of the functions inside of the instrumented DLL as you would expect. However you will also see every function Read More...
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Profiling FAQ #1: Why doesn't my Sampling Call Tree look like my Instrumentation Call Tree

Posted Friday, April 08, 2005 1:34 PM by scarroll
This post is adapted from an internal mail. The customers were somewhat confused about the reason their callstacks looked so different in Sampling mode and Instrumentation mode. Let's say your program consists of only 2 DLLs, foo.dll and bar.dll. Foo.dll Read More...
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Must watch Managed Perf Primer on Channel 9

Posted Thursday, April 07, 2005 4:14 PM by scarroll
I watched all 50 minutes of Rico Mariani's new Channel9 video which can be found at http://channel9.msdn.com/ShowPost.aspx?PostID=54964 . It's a really excellent summary of the points that Rico has been driving home about getting better perf out of your Read More...
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Profiling Tip #2: Managed Code profiling and the command line

Posted Thursday, April 07, 2005 3:44 PM by scarroll
The most common question that comes in to the internal profiler by far is "Why am I not seeing any managed code in my profiles?" Most of the internals who use our profiler like to do profile collection using the command line tools. The reason why this Read More...
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Profiling Tip #1: release vs. debug

Posted Thursday, April 07, 2005 3:25 PM by scarroll
Don't laugh! I've seen this happen a few times now. In the UI , if you are debugging your debug build and then switch to performance tools and push launch, you will be profiling your Debug bits! Don't do this. Make sure you have set your configuration Read More...
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What I've been up to... dogfood deployment

Posted Thursday, April 07, 2005 3:21 PM by scarroll
So over the past two months, I've been busy with the rolling out of the VS profiler to as many internal teams as we can. We've gotten a lot of good feedback from this which I will start to share with all of you over the next few posts. Read More...
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