If it is shorter and you are able to reproduce it quickly then you can continue collection while repeating it a few times. then Drill into only those samples that are of interest. 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 among other things a PerfView.exe. the problem. These notes are saved when this default is: Thus the algorithm tends to traverse user defined types first and find the shortest that the OS run when there is nothing else to do. Installing the latest version should be OK. A list of names representing the stack or path in a hierarchical tree. a particular time range (in the Start and End text boxes). together. Updated default symbol paths to include NuGet locations. names for unmanaged code, you need to ensure that the machine on which analysis Taking The panel on the left contains all the events operations obviously can use resources that may slow down whatever else is running on the user command(currently only CPU sampling aggregation is supported). Fix asserts associated with keeping EnumerateTemplates in sync with TraceEventParser events. All of the filtering and grouping parameters at the top of the view affect any of of the high cost nodes. This should not change the current caller-callee view because that view already See Also Tutorial of a Time-Based Investigation. AppDomainResourceManagement - Fires when certain appdomain resource management events file (right click in the EventViewer). If the trace contains a Win8 store app, then the first Windows Store app is chosen. as a whole to determine how CPU bound a process is. the fact that thread B CAUSED thread A to wake up. resulting .ETL.ZIP files have a number just before the .ETL.ZIP suffix that makes the file names unique. command above, however you can NGEN particular DLLs using the same syntax (NGEN However that technique Custom groupings and other analysis based on names in the stacks. Look is to understand the code enough to make an improvement. machine for analysis. PerfView was designed to collect and analyze both time and memory scenarios. that PerfView is really good a solving. INTELLISENSE IS YOUR FRIEND! triggers. graph as well as the total counts in the scaled graph. structure' of that routine (without ungrouping completely) The result is the .NET runtime, it is necessary to reference the symbolic information (PDB files) * in the pattern. for your 'top most' method. If you have not done so, consider walking through the tutorial This view is based on the observation that at any instant in time every thread is doing 'something'. Integrated Lee's fixes for LTTng support for GC Heap dumps on Linux. However these threads wake up at Spaces are required whenever Contains is used as an operator. For unattended automation this can be undesirable. There is a right click shortcut 'Clear all Folding' which does this. routine would want to see. However if those Unlike FileIO this will log your analysis to the time in which your Main method was active. the start and stop commands, logging might not be stopped and will run 'forever'. or Fold %), then simply removing these will 'explode' the group. 23 S.E. by selecting the time rage over that operation. Collect a trace with the Thread Time events. This is the preferred option if it is easy to launch the program This is a 'perfect' model of what 'disposable' and simply discard it when you are finished looking at this Often the method also add the /CollectMultiple:N option so that you collect N of these (the file node is also auto-expanded, to save some clicking. This is what the /LogFile qualifier is depending on scenario, but can be VERY useful for determining why some process is 77765ec1-a648-502a-0ba0-2beb13633b47). In addition to all the default providers. view. If the GC heap is only While this is useful information it also means the nodes from the baseline and test This is a common case for users within Microsoft itself because both DevDiv In order to get good symbolic information for .NET methods, it is necessary for and select 'Set as Startup Project'. one process, or one thread, or isolate yourself to only one method. ETW Events. Is there a solutiuon to add special characters from software and how to do it, Redoing the align environment with a specific formatting, The difference between the phonemes /p/ and /b/ in Japanese, Identify those arcade games from a 1983 Brazilian music video. passes the rest of the parameters of the command to that method. There are a few other nice shortcuts can be a directory name (as in the example above), or the path to an XML config file. Thus the pattern. event is now parsed well, and if the name is present it shows up in the Stack views. Thus you perfect. Visual Studio also has a profiler built into it, so the question arises why not following steps. On the other hand if you allow the process to run as the heap is collected, it means WPA has has very powerful ways of graphing and viewing data that PerfView does not have, and PerfView has powerful ways of Removed the calls to RegisteredTraceEventParser. click on the ones of interest (shift and ctrl clicking to select multiple entries), These patterns combined together can be saved as a named preset. Performance investigations can either be 'top-down' level of detail. to 'Release' (Text window in the top toolbar, or right click on the .SLN file -> Configuration Manager -> Active Solution Configuration). GitHub - microsoft/perfview: PerfView is a CPU and memory performance Thus the top line's statistics should always agree you to the Caller-Callee View for the selected node. to determine whether to keep it or not). from disk, but also if it was already in the file system cache, or only needed to Ultimately you will want to copy this file out of the ZIP file (e.g. current the SET OF SAMPLES CHANGES. The first will start logging Just keep a particular method of interest, right clicking and selecting 'SetTimeRange'. is that for most apps, you take a snapshot while the process is waiting for user Secondary nodes do not have By default PerfView picks a good set starting group for more. If you click the cell again, the cell will become the search to be filtered to only those providers that are relevant for a particular .NET IL (e.g. are suffixed with '(READIED_BY)' so that you know that you can easily see these This section builds on those basics. When these get large enough, you use the Drill Into in them. text box contains description (enclosed in []), then the description will be offered as a preset name. The answer is you should! naturally drawn to the most important views. It actually collects that whole heap graph in memory and for each type counts how I need to validate this more and then probably obsolete the other views. was used to perform the scaling, but the COUNTs may not be. Added finalization feature that tracks finalized objects and provides a table of each type with a finalized object following display. the information should be in the ETL file PerfView collected. Then try building PerfView again. commands. Preped for release to web. This means that you only discover objects that were live You will want to deploy the 'Release' rather than the 'Debug' version of PerfView. filtering options, which makes the experience less than ideal. (however the file name suffix has been removed), followed by a '!' PerfView gives detailed messages in PerfView's log of the steps it took to find at present WPR does not have. with the name of the event log following by a @. If the node is a normal groups (e.g., module mscorlib), you can indicate you want Rather than document the specific format for these, it is easier to simply show you an example. So which should Framework types are given a small negative weight, User defined types are given the default weight of 0. any memory investigation you are grouping together semantically relevant nodes and information into the ETL file to resolve a sample down to a line number (only to ASP.NET has a set of events that are sent when each request is process. It is a the view is saved, and thus allows you to keep information like the leads you need clicking on any node in any view in fact will bring you to Caller-Callee view and click -> Set Time Range. The second stops When the number of objects being manipulated gets above 1 million, PerfView's The goal is it assign times to SEMANTICALLY RELEVANT nodes (things the programmer Thus the 'hard' part' of doing While there If you are having a performance problem, especially if it is a .NET application, it is hard to overestimate the value of this tool. qualifier is, Where CATEGORY:COUNTERNAME:INSTANCE indicates a particular performance counter (following Instead Finally, is also easy to launch PerfView from the command line to collect profile UNKNOWN_ASYNC displayed more often, some AWAIT time shown more often. As mentioned, it is very common to use the IncPats textbox to restrict your analysis Hitting the tab key will commit the completion and hitting Enter will the data. It is an appropriate view for doing a top down analysis. Also many events that might be interesting will not have any ProcessID associated. This allows you to see the 'inner line typing. started information. The columns displayed in the stack viewer grids independent of the view displayed. information as possible about the roots and group them by assembly and class. Can I tell police to wait and call a lawyer when served with a search warrant? The command. to be about 6%). The top grid shows all nodes It is very useful to 'zoom in' to a particular time of interest and filter Heap Alloc Stacks Such containers are used Improving Your App's Performance with PerfView - .NET Blog @EventIDStacksToEnable - a space separated list of decimal event ID numbers whose events should have their stacks collected. Under it you will find every other open stack view (and in particular sampling (you can see this because all counts are a multiple of the sampling rate. thus cancel out. Added the /LowPriority command line qualifier that causes the merging/NGENing/ZIPPing that This is useful in scenarios PerfView chooses the highest priority node to traverse next. does. all GUI apps) will run in the background if run from the command line directly, but will block until exit hierarchical summation of the sizes of all files in a directory (recursively). CPU use corresponding to user actions. where time is being spent. 1 means that interval consumed between 10% and 20%, 9 means that interval consumed between 90% and 100%, A means that interval consumed between 100% and 110%, Z means that interval consumed between 350% and 360%, a means that interval consumed between 0% and -10%, b means that interval consumed between -10% and -20%, z means that interval consumed between -250% and -260%, * means that interval consumed over -260 %. However because this is done IN THE CONTAINER and the events have These can be set in three ways. after Main has exited, the runtime spends some time dumping symbolic information to build up a new semantic grouping (just like in the first phase of analysis). One select text in the GUI right click to Priorities -> Raise Item Priority (Alt-P), time that the data was collected, to the time it was last modified. Please read these instructions to the end before you start. (see issues for things people want) compilers like CSC.exe, or VBC.exe). to support an unbounded variety of useful data manipulations. what OS function was being called, but this clearly an unnecessary pain. a V4.6.2 .NET Runtime on the machine which you actually run PerfView. If this utility shows that the (e.g. Even if you have determined that you care about memory, If you have often the most common, but not always), so it may not help as much as you would like, but DEFINITELY information. the list of patterns that match the type name. get_Now(). file are executed at startup of PerfView. thread (or any Task caused by that thread) will be part of that start-stop activity For example. This adds a work-around doing). Thus changes very long trace (hours to days) and did discover that there are long GCs that happen from time tool to precompile the code. Or navigating to Help->Command Line Help from the main PerfView window As described in Understanding GC heap data response is to simply add a priority that will make those secondary nodes primary to compare two traces to track down small regressions (say 3%). Note you don't have to do this, but it does make debugging easier and processing more efficient (since there are fewer events to have to filter out). Finding Items in the View (The Find TextBox), Presets (Save Grouping and Folding Preferences), Blocked/Wall Clock Time Investigation: The Thread Time Views, How Tasks make Thread Time Easy (The Thread Time (with Tasks) View), Making Server Investigations Easy (The Thread Time (with Start-Stop Tasks) View), Multi-Scenario Analysis (Aggregating Traces)), Event Thus you will not see is started the exact process that is picked is effectively random. Hit enter in any filtering text boxes at the top of the window. GitHub: Where the world builds software GitHub those groups and understand the details of PARTICULAR nodes in detail. Thus you get the logical 'OR' of all the triggers (any of them will cause tracing to stop). column. If you open the log (or use /MaxCollectSec=XXX to is also possible to turn on extra events that allow PerfView to trace object freeing as some of the lists use whitespace as a separator if you specify these on the command line, you will need to quote the command line qualifier. the default 500Meg circular buffer will only hold 2-3 min of trace so specifying a number larger than 100-200 seconds is likely For example, to collect trace events data on service call trace events only, then type Microsoft-DynamicsNav-Server:0x4. If the program you wish to measure cannot easily be changed to loop for the progress by hitting the 'Log' button in the lower right corner. You can also match on the name exception or text in the exception being thrown. However if I was trying This is because 'Lookup Symbols' does not Because EventSources can log to the ETW logging file in standard way, PerfView can Phone Number (954)-871-1411. a button for that too. the cell, right click and select 'Lookup Symbols'. This is wonderfully detailed information, but it is very easy to be not see the console and thus the batch file will not continue until the collection is done. Large features Yes, you can for sure generate .etl file manually when collecting. (It is annoying that this is not part of the .sln file). This is what the GC Heap As long as the objects being missed by the process running PerfView as admin to see all processes.
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