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Questions tagged [xperf]

Xperf is part of the Microsoft Windows Performance Toolkit as a Command-Line Reference for Windows 8 and 8.1.

See Microsoft MSDN page for operators and actions.

16 questions
14
votes
3 answers

High CPU usage by "System" and "System interrupts" (caused by ACPI.sys)

I have a laptop, which was running Windows 8.1 x64 without any problems. Now with Windows 10 x64 installed, Task Manager constantly shows unusual CPU usage by "System" and "System interrupts". To solve this, I already tried the following, without…
Brane
  • 609
6
votes
1 answer

Xperf vs WPR differences in captured data

What are the differences between these two tools? They are part of the same package: https://docs.microsoft.com/en-us/windows-hardware/test/wpt/ And they are using the same API I assume, but Microsoft does not state if they have differences and…
Maksim Soifer
  • 61
3
votes
1 answer

xperf trace of ATI driver causing a 1 minute freeze while changing resolution

I've recently been getting complete hangs (black screen, music stops, cursor won't move, etc.) of over a minute when locking my machine, or changing resolution. It only starts happening after a while (i.e. rebooting fixes it), and once it starts it…
FauxFaux
  • 171
2
votes
2 answers

Not able to extract performance data from .ETL file using xperf commands. getting error "Events were lost in this trace. Data may be unreliable ..."

Not able to extract performance data from .ETL file using xperf commands. Xperf Commands: xperf –i C:\TempFolder\Test.etl -o C:\TempFolder\BootData.csv –a process Getting following error after executing above command: "33288636 Events were lost …
ur22
  • 21
1
vote
0 answers

WPA shows NIC driver DPC fragment running for 232 milliseconds

I'm stress testing my UDP proxy on a machine with 8 logical CPUs. At around 14 thousand UDP clients, one of the CPUs (CPU 4) starts spiking and UDP throughput (as shown by Task Manager) plummets to zero. I used WPR to record CPU usage during the…
Marc Sherman
  • 111
1
vote
1 answer

Can an xperf trace contain passwords?

I recorded an xperf trace. Can the trace contain passwords? (assuming that paths contain no password) I see that upon hitting xperf -stop I have the following warning: The trace you have just captured "C:\User.etl" may contain personally…
Franck Dernoncourt
  • 24,246
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  • 400
1
vote
1 answer

How can I read the time metric for a product step using xperf

I have Windows Performance Kit installed on my Win7 machine [xperf.exe version is 4.8]. I am basically trying to measure the time taken to perform a specific set of steps on my s/w application [standalone]. I have recorded the trace when performing…
harmonybells
  • 11
1
vote
1 answer

xperf profile services

When I profile using xperf there are always cases when I see, that, say svhost(1552) "eating resources". I could then go to ProcessExplorer and see that svhost(1552) running like 10 services. How to determine which of the services is a culprit? Is…
Dmitry Romanov
  • 417
1
vote
2 answers

High "System" CPU and sluggish response after connecting eGPU

When I connect a Lenovo laptop with embedded Intel Graphics to an eGPU dock (Nvidia) which drives all monitors, the CPU usage remains high with the kernel ("System") always consuming more than 8% CPU. Using procexp to view the kernel threads, I can…
Mitch
  • 1,215
1
vote
0 answers

how to compute how much memory a process is using?

I would like to know, how much cumulative memory a process is using? I am analyzing my system's performance during a large copy operation. In that, I am targeting few processes. I want to calculate how much memory they use during that time and if…
Mr_Aj
  • 11
1
vote
0 answers

How to ID a bad explorer extension without disabling it?

I have a Windows 7 Enterprise computer that within the last few months when it resumes from sleep or hibernate it slows down drastically for a minute or two before becoming responsive. Typing in my password takes at least 20 seconds to show up and…
Jay
  • 131
1
vote
1 answer

How to list all the File accessed by a process? (also released)

I'm trying to get a list of files accessed by a specific process by having either its process ID or by launching it under some command line utility. I tried xperf but the documentation is really vague and despite a day of attempts, I can't get what…
snovelli
  • 121
0
votes
1 answer

Need trace analyse - system slowing down when mouse pointer is on desktop

we have a strange problem. It's on Windows Server 2016 but it's also reproducable on "normal" Windows 10. We are running approx 160 Processes on the system. The total CPU amounts to 10-16%. Now the problem: Everytime the mouse pointer is on the…
GreenEyedAndy
  • 101
0
votes
0 answers

Windows Server 2019 high memory pool usage

I have spent months researching and messing around and have finally decided to ask for help. I have a Windows 2019 Server, that has high Paged and Non-Paged pool usage. Upon reboot and the first user login it runs GREAT, pool usages are under 1gb…
CTIDRV
  • 1
0
votes
1 answer

CM31 taking a lot of ram. Followed various guides without a solution

On Windows 8.1, the system was using a lot of RAM without me running any programs. I had 4 GB of RAM and upon startup almost 2.5 GB were already used. Following the steps described here Windows using too much RAM, how to diagnose resource hog, I…
Joe Doe
  • 103
1
2