Mastering IntelliTrace in Development and

Production

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Sasha Goldshtein

CTO, Sela GroupMicrosoft C# MVP, Azure MRS@goldshtn blog.sashag.net

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MASTERING INTELLITRACE IN DEVELOPMENT AND PRODUCTION

IntelliTrace®• Profiler-logger-debugger hybrid• “Historical Debugging”• Tracks events and method call

information at runtime• Records stack trace, local variables, and

custom information for each event• Records exceptions, SQL queries,

performance information for later review#devconnections

MASTERING INTELLITRACE IN DEVELOPMENT AND PRODUCTION

DEMOHistorical Debugging with IntelliTrace

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MASTERING INTELLITRACE IN DEVELOPMENT AND PRODUCTION

What Exactly Is Collected?• Parameters• Return values• Reference type

local variables– For each

referenced object, whether or not it was there (but not its contents)

void ReadTweets(string account){ var tweets =

GetTweets(account); int count = 3; for (int i = 0; i < count; +

+i) DisplayTweet(tweets[i]);}

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MASTERING INTELLITRACE IN DEVELOPMENT AND PRODUCTION

What Exactly Is Collected?• Interesting runtime

events– WCF, ASP.NET,

ADO.NET, file access, UI stuff, etc.

• You can customize with your own events!

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MASTERING INTELLITRACE IN DEVELOPMENT AND PRODUCTION

What Exactly Is Collected?

• Performance alerts• Exceptions• SQL queries

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MASTERING INTELLITRACE IN DEVELOPMENT AND PRODUCTION

IntelliTrace Overhead• Method-level information is costly (2-

10x slowdown not unheard of)• Events and performance alerts are

not as costly• You can configure IntelliTrace on

specific modules only for speedup#devconnections

MASTERING INTELLITRACE IN DEVELOPMENT AND PRODUCTION

Collecting IntelliTrace Logs• Visual Studio can save logs from every run• Stand-alone collector:– IntelliTraceSC.exe launch /cp:plan.xml app.exe

• PowerShell cmdlets for ASP.NET/SharePoint• Microsoft Monitoring Agent (MMA):– Microsoft Test Manager integration– Microsoft System Center integration– Stand-alone monitoring agent

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MASTERING INTELLITRACE IN DEVELOPMENT AND PRODUCTION

DEMOCreating IntelliTrace Logs

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MASTERING INTELLITRACE IN DEVELOPMENT AND PRODUCTION

IntelliTrace on Azure• The only practical

way to debug long-standing issues in cloud applications

• Works with all kinds of cloud services

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MASTERING INTELLITRACE IN DEVELOPMENT AND PRODUCTION

DEMOCollecting IntelliTrace from Azure

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MASTERING INTELLITRACE IN DEVELOPMENT AND PRODUCTION

Extending IntelliTrace Events

• Add your own events to CollectionPlan.xml

• IntelliTrace can generate an event from any method call in your code or framework code

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MASTERING INTELLITRACE IN DEVELOPMENT AND PRODUCTION

Custom IntelliTrace Event<DiagnosticEventSpecification> <SettingsName _locID="...">Garbage collection</SettingsName> <Bindings> <Binding> <ModuleSpecificationId>mscorlib</ModuleSpecificationId> <TypeName>System.GC</TypeName> <MethodName>Collect</MethodName> <MethodId>System.GC.Collect(System.Int32):System.Void</MethodId> <ShortDescriptionGC induced</ShortDescription> <LongDescription>GC of gen {0}.</LongDescription> <DataQueries> <DataQuery index="0" type="Int32" query="" /> </DataQueries> </Binding> </Bindings></DiagnosticEventSpecification>

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MASTERING INTELLITRACE IN DEVELOPMENT AND PRODUCTION

Summary• IntelliTrace is super-useful inside

Visual Studio while debugging• You can collect IntelliTrace data from

QA, cloud, and production• You can extend IntelliTrace with your

own events#devconnections

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