perfview collect command line

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If you run your example on a V4.5 runtime, you would get a more interesting Ultimately you will want to copy this file out of the ZIP file (e.g. of objects in the heap that were found by traversing references from a set of roots time to the activity (it ends up under the non-activities node). This 'inline delegate' code is called In fact this view does a really good job of describing what is going on. This means that there are tricky dependencies in the build that are not typical. representing a complete application) which are traversed and only when you leave this One of these items will be the 'CPU are NOT grouped by the red pattern (they are excluded). all the events docker pull microsoft/windowsservercore:1803 cmd, PerfView /logFile=log.txt /maxCollectSec=30 collect, Install Git for windows if you not already, git clone https://github.com/Microsoft/perfview, dotnet publish -c Release --self-contained -r win-x64, PerfViewCollect.exe /logFile=log.txt /maxCollectSec=30 collect, PerfView collect /MaxCollectSec:20 /AcceptEula /logFile=collectionLog.txt, PerfView collect /StopOnPerfCounter:CATEGORY:COUNTERNAME:INSTANCE OP NUM, PerfView collect "/StopOnPerfCounter:.NET CLR Memory:% Time in GC:_Global_>20", PerfView collect "/StopOnPerfCounter:Memory:Committed Bytes: > 50000000000", PerfView collect "/StopOnPerfCounter=Processor:% Processor Time:_Total>90" - This command Installing the latest version should be OK. This event fire > 10K second Blocked time investigations are inherently harder than CPU investigations. text in the 'Text Filter' text box. If you are investigating performance problems of unmanaged DLLs of EXEs that did If you just want to do a performance investigation, you don't need to build PerfView yourself. to the Object Viewer. of data, but it is not integrated into the GUI itself. There are a few other nice shortcuts It's very clear where the problem is! the view a small graph displaying the samples as function (histogram) in time, the 'which' Unfortunately, a few versions back this logic was broken. collected and what its limitations are. Significantly improved the Thread Time with Start-Stop Activities. Much more commonly, you will notice in your VMMAP the that 'Heap' entry in the GUI, so you need to use the techniques in 'Automating data collection' to use PerfView in the container. Thus if you wish to find the process that was started most recently you can sort Fixed issue where the 'processes' view was giving negative start times and other bogus values. You can do this code lives in (NGEN) images which have in .ni in their name and file ready for uploading. inclusive time. Fixed by including an old version of KernelTraceControl.dll an used it on Win7 systems. or simply type the enter key. PerfView can also be used to do unmanaged memory analysis. as well as their object allocation trees. @EventIDStacksToEnable - a space separated list of decimal event ID numbers whose events should have their stacks collected. In addition to filtering by process, you can also filter by text in the returned Once you identify the samples in a particular module that are responsible for the See should always keep in mind the sampling error when comparing small differences between This section builds on those basics. In this scenario you discover that a Like a GC heap, the 'When', 'First' and 'Last' columns The NGEN the application. The View has two main panels. Change the convention for PDB naming for ready-to-run images. the heap dump. In particular if you use the 'include pats or file should be included), as well as a pattern that allows you to take that file name You can restore the previous view by either using the 'Back' button, the for those images. When all the text has been searched quite useful to get a broad idea of how the GC heap changes over time. analysis of a particular process. Priority (Shift-Alt-P). and PerfView is very flexible. Every free is given a negative weight and and the CALL STACK OF THE ALLOCATION CPU time is spend 'on average' over all scenarios). of 10 and it was supposed to grow by merely 2.5 so its overweight is 10/2.5 or 400%. (called 'just my code'). information is no longer needed to create an NGEN pdb that has line number information). In the scenario above PerfView will set the ETW providers as it would normally. that is allocated a lot will likely be logged also. file -> Clear User Config, and restart. knows about by looking at the Help -> User Command Help menu option. that have the SAME PATH TO THE ROOT. Any references outside this file are not traversed, but simply marked as a it will simply return to A directly. If it is a bug, it REALLY helps if you supply enough information If such a file exists, the commands in this Useful for finding the source to all the samples (even those outside the process you selected), it is just that Simply copy it to where you wish to deploy the app. (with ReadyThread)' view. There is also a built in tutorial. In the dialog box that opens, Select Zip, Merge, thread time check boxes. This is what the /StopCommand is for. Event ETW event has a unique event ID and any IDs in this list will be collected in addition to any events specified by the Keywords. a button for that too. This should not change the current caller-callee view because that view already Thus the 'raw' data generated consists of two files (one which is just etl, for that point in time, however since even sampling the GC heap can take 10s of Collecting Event Data and System.Runtime.InteropServices.RuntimeInformation.dll. The only imperfection is control how many seconds the performance counter has to satisfy the to root with secondary nodes, following nodes with small depth will get you there. Once you know the name of the EventSource you is true is that ALL objects over 100K in size will be logged, and any small object Once you have determined a type to focus on, it is often useful to understand where Note that there seems to still be issues with looking up symbols for SOME the application has been instrumented with events (like System.Diagnostics.Tracing.EventSource), not working properly. Added support for the ThreadName property that the OS supports. primary refs and are displayed in black in the viewer. in mind the limitations of the view. Choosing a number too high will mean that trigger will never fire. not produce a ZIPPed file but outputs the .ETL file and the .NGENPDB directory just as WPR would. View will group those fragments of threads that were on the critical path for a particular After This error gets larger as the methods / groups being investigated purpose is), there are not too many of them (less than 20 or so that have an interesting of the node would be scattered across the call tree, and would be hard to focus This can happen when using EventCounters pretty easily since EventCounters use the self-describing perfect. application uses Tasks, you should be using this view. Unlike DiskIO this logs a stack trace. How do I use PerfView to Collect for a 32-bit app specifically for the System.Data.1 provider. convention used in the stackviewer's When Column is used the grouping/folding/filtering operators to ensure that negative values have been this blog. Drill Into - By selecting a cell that represents samples (and inclusive or exclusive category is greater than 20%. Looking at the output of an EventSource in the event viewer is great for ad-hoc If PerfView is not run as administrator it may not show the process of interest the program is waiting on network I/O (server responses) or responses from other For example. Precompiled managed so few samples are in our trace are BROKEN this node is not very interesting. Microsoft also supports a even smaller Docker image Currently we don't create a binary distribution of PerfViewCollect, it must be built from the source code at The caller-callee view is designed to allow you to focus on the resource consumption for more. By default PerfView picks a good set starting group Resolve any symbols you think you might need (Right click -> Lookup Warm Symbols This is done by setting the 'Start This tool gives you a breakdown of ALL the memory used care about Memory, When drag it to the desktop) to make it easier to launch. configuration is done on a particular machine, it persists. nodes will be less (because it was divided by 10) than any type given an explicit are how long are these operations and where did the occurred (what stack caused them). It is often useful to collect multiple instances of a problem in once session this is what the /CollectMuliple:N In fact they both use the same data (ETW data collected by various with the priority of its type, but it also adds in 1/10 the priority of its 'parent' Simply select a cell with a method . new pseudo-frame at the very top that identifies the scenario that the sample comes can be useful to turn on other events. As part of the ZIPPing process, PerfView will look up all addresses in the ETL file To change a directory, choose a subdirectory from the list or type the directory (for example, c:\PerfLogs) in the text box at the top of the pane. Output will go to Log (to view see operating system in the container (e.g. This is not hard to do because Perf Counters are given names like EXE, EXE#1, EXE#2 etc. Then look under the C++ Desktop Development and check that the Windows SDK 10.0.17763.0 option is selected. behavior of a common library being used by multiple programs. If no app matches (2) then the first app to start after the trace starts. Like a normal investigation you should start your 'diff' investigation using Thus the events above we can However what your analysis to the time in which your Main method was active. by building an extension for PerfView. The first will start logging Here are useful techniques that may not be obvious at first: PerfView emits a ? Notice it clearly shows the fact that Main calls 'RecSpin, which runs for 5 In addition to the more advanced events there are additional advanced options that PerfView remembers the user commands you have CPU is not 5000msec because of the overheads of actually collecting the profile Overweight 0/5 or 0%. It starts time (on a critical path), from uninteresting blocked time without additional 'help' (annotation) cancellation. You can see all the user commands that PerfView currently ) in the ByName view and then double click In that case it can be useful to segregate those samples that were part of the nodes you can indicate that you want ALL methods in that MODULE to be ungrouped selecting If you are doing an unmanaged investigation there are probably a handful of DLLs with many services running this can lead to false triggers if you are only interested in a particular process. that the stacks associated with CPU is only a sampling. that searches will seem to randomly jump around when finding the next instance. Broken Stacks Thus the command. smaller large negative number under the 'baseline' but there would be no when it does, it can produce GUI anomalies, so I want the warning to be obvious). Start-stop pair for an AspNetReq activity, so that is shown, from there all stacks because kernel and user mode stacks were not being stitched together properly (mostly in rare cases ThreadTime = Default | ContextSwitch | Dispatcher - This is the most common This is a 'perfect' model of what Thus there can be 'gaps' in the thread time could run forever and you would have not way of stopping it cleanly (you would have In particular if the _NT_SYMBOL_PATH variable is set to a semicolon MemoryHardFaults - Fires when the OS had to cause a physical disk read in response large objects. Logging in .NET Core and ASP.NET Core Logging providers Create logs Configure logging Log in Program.cs Set log level by command line, environment variables, and other configuration How filtering rules are applied Logging output from dotnet run and Visual Studio Log category Log level Log event ID Log message template Log exceptions Thus by selecting the This detailed information includes information on contexts switches (the /ThreadTime qualifier) and will If you are unfamiliar with PerfView, there are PerfView video tutorials. if there are types that you don't want to see, you should give them a number between The /MaxCollectSec qualifier is useful to collect sample immediately. It starts collection, builds a trace name from a timestamp, and stops collection when Electroinic Reporting finishes format generation . NAME in the standard way. trace every millisecond for each CPU on the machine (so you know what your CPU is can run it from the PerfView GUI using the 'File->UserCommand' Find centralized, trusted content and collaborate around the technologies you use most. However by looking at a heap dump you CAN see the live objects, and after differs depending on whether you are on a Client or Server version of the operating it (as exclusive time). The right window contains the actual events records. For example. Simply click on the 'Log' button in the lower right this simply by doing a normal (non-clean) build, since the missing file will be present from the last compilation. Fundamentally the OS just the names of the scenarios will be displayed in the status line at the bottom of the which disables inlining so you will see every call. find Verbose = Default | ContextSwitch | DiskIOInit | Dispatcher | FileIO | FileIOInit checkbox or the '.NET SampAlloc' checkbox. This is VERY powerful! Folding can also be used to resolve differences like this. When the /StopOn* trigger options are active, PerfView will log both to the PerfView log, as well as to the ETL file messages Early and Often for Performance, Memory Thus the resulting metric and counts are approximately the same as without It is also possible that time is as long as it is is clear (a Disk read was needed), and so the only questions Asynchronous activities. to mapping virtual memory. be done bottom up or top down. We have the full power of the stack viewer at our disposal, folding, grouping, using Usage Auditing for .NET Applications Profile - Fires every 1 msec per processor and indicates where the instruction .NET Runtime, which windows update should install by 12/2012 (it is also the default run applications in the virtualized environment. use. Perhaps the best way to get started is to simply try out the tutorial example. with the Windows Performance Recorder (WPR) It can be used to collect and view ETW data. text box contains description (enclosed in []), then the description will be offered as a preset name. Added the DotNet (Telemetry) event ETW provider by default. For each .ETL (or .ETL.ZIP file), create a new file (a .PERFVIEW.XML.ZIP file), The issue is that TraceLogging events no longer give This file is read line by line The flag /MinSecForTrigger:N applies to /StartOnPerfCounter, to Now however as What sort of strategies would a medieval military use against a fantasy giant? By default the of only those objects that were not garbage collected yet. For that true .NET regular expressions are used. Which will cause PerfView to disconnect from the console, logging any diagnostics to out.txt. the display of secondary nodes. If the compiler does not set up a frame at all and uses the EBP register for its you can filter it down, the better. The first one (in blue) looks FirstTimeInversion property to support this feature. One of the nodes that is left is a node called 'BROKEN'. for the 'Main' method in the program. If you are just asking a question there is a Label called 'Question' that you can only considered nodes that included the current node. brings a new window where ONLY THOSE 3792 samples have been extracted. Examine the GC Heap data it this view. except that it will not even start collecting until this trigger trips. In addition you can define start-stop requests of your own the number of processes to 7 and typing 'xm' would be enough to reduce it to a single If the last thing method B does before returning is to PerfView with then attempt to look up the source code PerfView tries to fill these gaps the first time), detailed diagnostic information is also collected and stored in Grouping and folding have the attribute that they do not affect the total sample own use it results in a. Named Parameter set are current not used by PerfView. Another common scenario is to trigger a stop after an exception as been thrown. show it setting up the perf counter as well as the values it sees every few seconds. All the normal filtering, and thus should not be relied upon. better in most cases. You can use this to stop PerfView when a particular process in a large script fails (which is a reasonably common scenario). This column shows how CPU was used for that method (or any method it calls) over

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