I am facing a problem with my Android App.
My application get a microphone by using Native Code in C and other services like MQTT.
But actually my app use a lot of CPU usage and a notification request the user to set my app on a deep sleep mode.
So I'm searching what part of my code use as much CPU and when I start CPU Profiler I see some Thread that use a lot of CPU but I don't know what part of my code it is.
My question is : How to know what Thread indicate in the CPU Profiler, corresponds to which service or thread of my code.
Thanks in advance.
I solved my problem basically by setting a name to my thread like that :
thread.setName("MainActivity_Thread");
This allow to display the name of the thread to the CPU Profiler.
Related
I have a console application that runs for less than 500ms, but that according to BenchmarkDotNet allocates more than 100 MB.
I am trying to figure out what are those 100Mb because it does not add up. However I cannot find a tool to do so in Linux or Mac. Once the method the app calls is over, the GC can clean all that memory without problems, so it is not a leak I can see in a dump, unless I take the dump in the very exact moment before exiting the method. I am not clear which is the moment in which the algorithm peaks in memory usage.
I can take CPU traces using dotnet-trace and show it in the browser with Speedscope, but I cannot show in Speedscope a trace when using gc-verbose or gc-collect as provider.
Is there a way with dotnet-trace to print in the console the stats of the created objects or anything like that?
try out dotnet dump and checkout this article by Tess Ferrandez.
and maybe you can share a little bit more information please.
I am looking for a solution that will monitor an application 's memory and cpu utilization and use that profile to give me an idea of how the same process will work if the specification is changed?
Do we have an application for the same?
I'm developing applications (services) for Windows and sometimes have problem with performance and recources (especially with MsSql). I need to know which service, application or OS component, developed by my or someone else, makes load CPU or HDD at some moment in past.
I whant to be able to do it using some kind of stored data (log), better with grafics.
Is there any way to do it?
Perfmon will be you built in friend!
you can either log current performance counters in a user session or let a background service track your preselected counters and you can check that afterwards.
you will find tons of explanations how to user perfmon. It is part of every windows since NT4.
Recently I start facing issue on few servers where CPU start consuming more resources than usual trend. I am trying to find out the root cause for this and took the dump of w3wp process from Task Manager(right click on process and took the dump).
Now the dmp file size is 14GB and I am trying to analyze it through WinDBG but the tool is not working and getting message:
I also took few minidumps but some of them opening fine while few are not so it's not related to confusion between 32bit or 64bit.(The collected dump is 64bit).
I am trying to know what causing this issue. Is it file size or I am not taking the dump properly.
I checked link but it's not helpful.
Windbg is not the right tool for this job. Dumps are only snapshots so you have no idea what happened before. Use ETW and here the CPU Sampling, which sums all calls and shows you in detail the CPU usage.
Install the Windows Performance Toolkit which is part of the Windows 10 SDK (V1607 works on Win8/8.1(Server2012/R2) and Win10 or the V1511 SDK if you use Windows 7/Server2008R2)), run WPRUi.exe and select CPU Usage
and press on Start. Capture 1-2 minutes of the high CPU usage and next click on Save. Open the generated ETL with WPA.exe (Perf analyzer), drag and drop the CPU Usage (Sampled) graph to the analysys pane
and load the Debug Symbols. Now select your process in the graph, zoom in and expand the stack, here you see the weight of the CPU usage of all calls
In this sample most CPU usage from Internet Explorer comes from HTML stuff.
For .NET applications WPA shows you .net related groupings like GC or JIT:
Expand the stack of the w3wp process to see what it is doing. From the names you should have a clue what happens.
My program is a slideshow. It runs on a machine with other processes, so while it's waiting to display the next slide I call SleepEx(N, false), expecting it to reduce to near-zero the amount of CPU it uses (N is between 100ms and 5000ms). On my development XP Pro machine that's exactly what happens but on my customer's XP Home machine it registers 30-80% CPU during the SleepEx(). The code is a single thread so whatever is using all that cpu is within the call to SleepEX(). Has anyone seen this before?
Which process is taking all that CPU? If you break into the process with a debugger - where in the stack trace is it spending time?
Try to use ProcDump to create a dump of the process when it reaches that CPU spike. Then analyze the stack trace to see where it's stuck. Do this several times you get a good sampling of where it's spending time.
I have seen this before. You block main window message processing thread.
You should not place Sleep() function in single-threaded application if it has main window message processing function. Windowed application always should process window messages without noticeable delay, in another case it will cause deadlock at least for application.
Consequences depends on windows platform, compiler settings and CPU configuration, usually application in debug mode has temporary workaround. But if you start such application compiled with release settings it can consume one CPU core with function, which have blocked his main window message processing thread.
Remarks section at MSDN Sleep() function description clearly states this situation.
You just have to lauch new thread, to use Sleep() function right there to allow free flow of window messages in main thread.