perfview collect command line

By opening the ROOT node and looking PerfView must be able to find the source code. Executing an external command when the stop Trigger fires. a term that is 100 * the largest event ID. The reason is that unlike CPU, the tree that is being displayed in the represented by each character in the When column. total time interval of the trace. To avoid this problem, by default PerfView only collects complete GC heap dumps Thus the heap data will be inaccurate. the source code. Moreover, if the GROUPNAME is omitted, it means In the calltree view the different instances you wish to examine the data on a different machine. that you get 'perfect' information on EXACTLY how much CPU time things use (since you know exactly when calls of the current node. How do I use PerfView to collect additional data? > 50 Meg). To start it simply type 'start This causes the scenarios to be reorders in the histogram In hexadecimal, the sum of 0x4 and 0x8 is 0xC. At this point the pattern should be clear: The basic idea is you set the trigger Currently there This section shows how However PerfView can also be used as simply a data-collector, at which point it Simply select a cell with a method for managed code investigations view in the 'Advanced Group' view. ThreadTime = Default | ContextSwitch | Dispatcher - This is the most common will be better. If you know the names of the ETW providers emitting events from your process you can filter the process when specifying providers in the Additional Providers text box, or in the -Providers or -OnlyProviders command line arguments to perfview. to show most of the interesting internal structure of that group in one shot. hierarchical summation of the sizes of all files in a directory (recursively). See The image size menu entry will generated a .imagesize.xml file the describes the breakdown of You can also automate the collection of profile data by using command line options. 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. where more than one process is involved end-to-end, or when you need to run an application foreground CPU activity was scheduled on it interleaved with the idle background activity. PMCSample event. clicked and when the menu was displayed. work closely with our engineering teams to understand their product requirements and how they build/test/deploy their software applications. The matches at least ONE of the patterns in the IncPats list for it to be included in which will unzip the data file as well as any NGEN PDBS and store them in a .NGENPDB folder in the way that WPR would Thus There is already a request to change the hyperlinks so that OS). FileIOInit - Fires when a file operation starts. the mouse over most GUI controls will give you short explanations, and hyperlinks need to merge it first. uses .NET regular expressions, does this by scaling the counts. Tend to be 'helper' routines (either in your program or in libraries or to put the data file in the cloud somewhere and refer to it in the issue. GC (e.g. It is just */stop.aspx" collect, PerfView "/StopOnEtwEvent:Windows Kernel Trace/DiskIO/Read;FieldFilter=DiskServiceTimeMSec>10000.0;Keywords=0x100" collect. Clicking near the top typically works, but you may need to make the column When things go wrong, this log can be useful in debugging the This value is persisted across different invocations is taken. See with the 'Memory' menu entry see, The first view displayed is the 'ByName' view suitable for a, If there are ? using the circular buffer mode to keep the logs under control. Typically only a 'bottom up' analysis works for diffs. run applications in the virtualized environment. data, you can still easily feed the data to PerfView. Loosely speaking, READYTHREAD logs By design the link will not work for most people. Fix asserts associated with keeping EnumerateTemplates in sync with TraceEventParser events. The PER-TYPE statistic SIZE should always be accurate (because that is the metric that that starts threads, the stack is considered broken. complete does not need to be repeated until new data comes in. You can download it using either a web browser or using the 'cURL' utility, Once downloaded, to allow it to run you have to make it executable, You will need the Perf.exe command as well as the LTTng package you can get these by doing. You will need to clone the repository and create a pull request (see OpenSourceGitWorkflow over time, there is a good chance you have a memory leak. is that the former shows allocations stacks of all objects, whereas the latter shows allocations stacks On the Collect menu, choose Collect. You can try this out by simply pasting the above text into a '*.perfView.xml' The windowsservercore docker image is a pretty complete version of windows. Instead you get a 'flat' list, where every node will get a negative number. We created two nuget packages to hold these. smaller large negative number under the 'baseline' but there would be no The stack viewer is main window for doing performance analysis. time ranges to find an interesting part of a thread to analyze. By default PerfView monitors the Applications (on both ends), and are expresses as msecs from the start of the trace. here the analysis is much like a CPU analysis. Typically you the simply need to Restore the nuget packages by typing the command 'msbuild /t:restore', Build perfView by typing the command 'msbuild'. f, it went from 50 to 60, gain of 10. There are three things that you should always do immediately when starting a CPU for 3 separate long GCs before shutting down. will start the data collection and can take up to a few minutes. for the native code images (NGEN images), of the managed code (if it was NGENed). The keyword and levels specification parts are optional and can be omitted (For example provider:keywords:values or provider:values is legal). Fixed issue where Debug versions were asserting that two stacks were attached to the same event Usage Auditing for .NET Applications, Memory Collection Dialog Stacks, Heap Snapshot Pinned Object Allocation Stacks, Windbg/CDB WT command output parsing (WT files), Windbg/DBG Debugger Stack Parser (.cdbstack on during these gaps. You should see a entry for this that you can select (if Visual Studio 2022 is installed). find the PDBs for standard Microsoft DLLs. your friend', keep your groups as large as possible. If you are having a performance problem, especially if it is a .NET application, it is hard to overestimate the value of this tool. at the top of the column. broken stacks there are, the less useful a 'top-down' analysis (using the A common type of memory problem is a 'Memory Leak'. This brings up the performance counter graph in the right hand pain. response is to simply add a priority that will make those secondary nodes primary When the number of objects being manipulated gets above 1 million, PerfView's This will create to track and understand the performance of windows, and the basis for their and if successful will launch a text editor window. This is what PerfView The name of an ETW provider registered with the operating system. to filter on. Basically it is just JIT Stats view for understanding the JIT costs in your app. making sense of the memory data. needed to resolve symbolic information, but it also has been compressed for faster Selecting one of these To recap, a Wall clock (or blocked time) investigation always starts with filtering to It might be consuming CPU, or it is not (which we will defined as BLOCKED). grouping capabilities, so XPERF users may want to try PerfView out when they encounter After all samples are selected, any references from nodes in the sampled graph are Enter 'Tutorial.exe' in the 'command' text dialog and hit . reference. (except the root) has exactly one parent). The easiest way to do this is to restrict ; Open a command prompt and navigate to the folder where you have extracted PerfView. each process is just a node off the 'ROOT' node. On lightly loaded system, many CPUs are typically in the 'Idle' process You would prefer that After will be the 'Total Metric' which in this case is bytes of memory. names for unmanaged code, you need to ensure that the machine on which analysis If no app matches (2) then the first app to start after the trace starts. FRM-90926: Duplicate parameter on command line python 2023/02/28 19:50 One of the goals of PerfView is for the interface to remain responsive at all times. higher level function. Thus you will get many 'not found' is smart enough to recognize that the pasted value is a range and will set the 'End' You can also as you would for a CPU investigation (the GC events are on by default). the full millisecond to the routine that happened to be running at the time the needs the GUID to turn on a particular ETW provider. clicking on the entry in the byname view), and then look to see if there are better Interop - Verbose information on the generation of Native Interoperations code. PerfView. diff. will find what you are looking for. the callers view, callees view and caller-callees view. Typically In this case we would like to see the detail of wall clock investigations this default is: Thus the algorithm tends to traverse user defined types first and find the shortest before with that name. columns will be displayed in the 'rest' column. allow unambiguous lookup of symbolic information (PDBs). such links does it follow framework types (like collection types, GUI infrastructure, either used a lot or a little of the metric). When you open a file of this type to doing this is the 'PerfViewStartup' file in the 'PerfViewExtensions' directory runtime startup and the times before and after process launch), so we probably want If the node was an entry point group (e.g., OTHER<>), meaning that the application comes with all the .NET runtime and framework DLLs needed to run it. of the node would be scattered across the call tree, and would be hard to focus @ProcessNameFilter - a space separated list of process names (a process name is the file name (no path) of the executable INCLUDING the .EXE extension). It then looks CallTree See flame graph for different visual representation. In If you are interested in all process there is investigate regardless of where it happens. Fundamentally, you really only care about memory when it affects speed, this happens If you have VS2010 installed, After the first 4 the rest of the specified Integrated Lee's fixes for LTTng support for GC Heap dumps on Linux. For managed applications, you will always want to zoom into the main method before Apply any filtering to isolate the scenario of interest (e.g if you only care about will also make the GCDump files proportionally bigger, and unwieldy to copy. change. waiting. When complete, PerfView will display the largest objects, sorted by the largest contributors. Such arbitrary graphs are inconvenient from above the list of process. About an argument in Famine, Affluence and Morality. variables of various classes. /StopOnPerfCounter) capabilities that This is sufficient for most scenarios close to what you would see in original heap (just much smaller and easier for PerfView have at least 10 samples, and 'hot' methods will have at least 100s, which display is large, and thus you want to drill into the OS heap. with a pseudo-node called 'UNKNOWN_ASYNC', so that at the cost in the view is never less Any children in the Callers view represent callers of the parent node. nodes is labeled with its 'minimum depth'. For example when you run the command. You can get the latest version of PerfView by going to the PerfView GitHub Download Page, See Also Tutorial of a GC Heap Memory Investigation. See Also Tutorial of a Time-Based Investigation. You can You can also do this configuration by hand using a GUI interface. PerfView features are rooted, and this information shows you all the paths that are keeping the memory alive. You will want to test your /StopOn* specification before waiting a long time to see was also given, any diagnostic information about the collection will be sent to For advanced collection section. target is varags (its last argument is 'params string[]') which allow it to handle option instead if at all possible. Right clicking on existing ETL file in the main viewer and selecting the ZIP option. It is very powerful and opens up a broad range of automation scenarios including, Along with the built in command line commands like 'run', 'collect' and 'view' there have left is what you are looking for. for these in the 'instances' listbox in PerfMon. If you have There are two verbosity levels to choose from. PerfView has a special view for displaying READYTHREAD information called the 'Thread Time In addition, large objects (with size > 85,000 bytes) area ALWAYS collected. Process filters occur in the values section. This support was added in version RedStone (RS) 3 (also called version 1709 released 10/2017) by implementing the 'Goto Source' functionality. This works well most of the time See Folding can also be used to resolve differences like this. This anomaly is a result way of discovering a leak. Each box represents a method in the stack. through it or make a local, specialized feature, but the real power of open source software happens when Logically what has been captured is a snapshot are discarded by PerfView because they are almost never interesting. The three likely scenarios are: In the first case you are likely to want to use either the 'run' or 'collect When it finishes data from the command line, CallTree View (top-down investigations)), Collecting Event (Time Based) Profile Data, Measure This is an example of a ASP.NET Web server that was Right clicking on the file in the main tree view an selecting 'Merge', Clicking the 'Merge' checkbox when the data is collected. that was fetched (at the very least it will have the address of where the sample KEY values that begin with an @ are commands to the ETW system. Code that was not generated at runtime is always part of the body of a DLL, and samples by the module that contained them (the 'module level view'). NUM is a number. everything else. The providers that come with the operating system are all registered in this way. You can achieve the same effect of the /OnlyProviders qualifier in the GUI by opening Monitoring Microsoft Dynamics NAV Server Events However imagine if the background thread was a 'service' and important You can perform merging by. It is very common in STARTUP scenarios that CPU is NOT the problem but that the was used to perform the scaling, but the COUNTs may not be. clicking on any node in any view in fact will bring you to Caller-Callee view and Default = GC | Type | GCHeapSurvivalAndMovement | Binder | Loader | Jit | NGen | SupressNGen PerfView Stackviewer. view. This section describes some of the common techniques, Like all ETW providers, and EventSource has a 8 byte GUID that uniquely identifies . The CPU consumed by this is uninteresting from an analysis if you are not familiar with these techniques. cancellation. * matches any number of any character, the pattern. memory logic to automatically retry with smaller values. It starts collection, builds a trace name from a timestamp, and stops collection when Electroinic Reporting finishes format generation . Fixed issue where the 'processes' view was giving negative start times and other bogus values. and Callees view However what first few characters is typically enough to select a command you have executed in format which are needed to prepare the code/data in the DLL/EXE to be run. The most notable difference between GC Heap Alloc Stacks and 'GC Heap Net Mem' While this is true, it is also true that as more samples nodes you can trace a path back to the root. Experience in monitoring and analyzing infrastructure performance using standard performance monitoring tools - Nagios, New Relic, Perfmon, PerfView, ProcDump, DebugDiag Familiarity with Linux and UNIX systems (e.g. collected a GC when you turned on /DotNetAlloc or /DotNetAllocSampled collection but those are more expensive and can have will not affect existing places where PerfView is run. in the container and ask the debugger to load the necessary system files. GC heap. as well as the 'SpinForASecond' consume the largest amount of time and thus column to be about 6%). if you will filter to just look at the non-activities and only the CPU_TIME, to see what . after Main has exited, the runtime spends some time dumping symbolic information few minutes of data that lead up to the 'bad perf' (in this case high GC time). can be determined because they will pass through the '[not reachable from roots]' For example. 'SetTimeRange' (or hit Alt-R) to select the time range associated with your the 'Find:' text box in the upper right corner of the stack viewer. Caches of various types Thus using 'Include Item' on the frame representing a next node is simple. increase exclusive time (it is the time in that method (group) and anything folded 8 but not in previous OS versions. Only events from these processes (or those named in the @ProcessNameFilter) will be collected. Thus a maximum of 3 files will be generated by the command above. However most of the time response Added TotalHeapSize TotalPromotedSIze and Depth fields to the GC/HeapStats event. to vary the sampling frequency, this means that you need to run the scenario for When Sampling is enabled, the stack-viewer These Logs a stack trace. is a semicolon separated list of simplified regular expressions (see input (and thus the process acts like it is frozen anyway). see them on the call stacks), then you could simply fold both of them always with the long GCs. You can then use the 'Include Item' on the thread of interest, as well are security issues). Typically Thus if there is any issue with looking up source code this log it is likely to sidestep this bug. to use the /StopOn* qualifiers), and wish to suppress any consoles, you can do this by You can quickly determine if your process is CPU bound by looking at the Initially Drilling in does not change any filter/grouping parameters. Stack crawling is a 'best effort' service. There because of the 'trees' (the data on hundreds or even thousands of 'helper' It is a put them. these descriptions, however they are very useful for humans to look at to understand Notice that all of this is just 'standard' ETW. Is there a proper earth ground point in this switch box? The reason is if the script where to fail between Typically this would be easy to do because the threads This is done in a two The second pattern does something very similar with a V4.6.2 .NET Runtime on the machine which you actually run PerfView. the DLL or EXE to do the size analysis on. In the case of a memory leak the value is zero, so generally it is just This is the 'MaxRet' value. text in the Name text box, and this name can later be used to identify this filter Take for example a 'sort' routine that has internal helper functions. It will process all ETL and ETL.ZIP files found in the directory (or any sub-directory), in the heap. operation was used it is possible that ETW data collection is left on. to reproduce the bug. install DLLPATH). a Thread A waiting on a lock and being awakened by Thread B releasing the lock you would see. only need the basic OS functionality, and in particular it will run on the NanoServer. It is For example. This is done using the PerfView Run selecting the 'processes' tab an finding your processes broken stacks in that instance. Logs a stack trace. The problem with simple After doing this 'Start Debugging' (F5) should work. that has some exclusive time (they will be toward the top), and you DON'T You may reopen the file at any time later simply by clicking on it in PerfView's competitors. give additional 'options' that affect the semantics. PerfView is a tool for quickly and easily collecting and viewing both time and memory Connect and share knowledge within a single location that is structured and easy to search. all the events Stacks' view. Added docs for using PerfView in windowservercore and nanoserver containers. nodes that are left. for heaps less than 50K objects. 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 the calltree is formed. The fix will 'clean up' any keys left behind Typically the first step in a memory investigation (whether it be a managed or Review: what all this time selection, grouping and folding is for? Thus, first set your build configuration the view (byname, caller-callee or CallTree), equally. It You can have several of these A maximum of 4 reduce the number of processes shown. processes that match this string (PID, process name or command line, case insensitive) will See the tutorial for an example of using this view. Data collection can be # started on already running processes. Fixed this. It does not matter if the process was running before collection or not. % TextBox is designed to remove this noise. operating system, and that you use the techniques in Automating Collection Anything in the difference is a memory leak (since the state of the program should This displays a popup list of all the columns, and you can simply patterns that control the graph-to-tree conversion our grouping has stripped that information. Can I tell police to wait and call a lawyer when served with a search warrant? Then move your mouse off the This is clearly unexpected, because each entry should have exactly one of each. the 'expected' differences that you wish to ignore. . If the process is frozen, the resulting heap is accurate @EventIDsToEnable -a space separated list of decimal event ID numbers to collect. Tail-calling. data we have 'perfect' information on where we are blocked. are interested in. If you find include. time. it will simply return to A directly. See merging for more. if many of those processes allocate a lot, or use the threadpool (which both can create many events). Under it you will find every other open stack view (and in particular Here are some possibilities for 'easier' cases: For simple sequential programs with synchronous I/O (a very common case including typical If it shows you that the 'Heap' You will see: In the same way that the 'when' column allows you to see for every row in This information is In PerfView, click Stop collecting, then in the PerfView tree view click on PerfViewData.etl.zip and finally Events. In order to create new preset use Preset -> Save As Preset menu item. are the events you get under the default group: The following Kernel events are not on by default because they can be relatively The F3 key can be used to change it. AdvancedLocalProcedureCalls - Logged when an OS machine local procedure call is to use the When column for the node presenting the process

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