When you see those ntoskrnl.exe!RtlpGenericRandomPatternWorker, ntoskrnl.exe!RtlpTestMemoryRandomUp calls So if you see this and use Chrome, turn hardware acceleration in Chrome off. There is no real way to detect which process causes it, but I know that Chrome can cause it if you have hardware acceleration enabled in Chrome. This means the function of the kernel which zeros the memory before it can be used again causes the high CPU usage: When you see ntoskrnl.exe!MiZeroWorkerPages as cause, it is trickier. In the following example, the CPU usage is casued by the broadcom network driver bcmwl664.sys This demo shows that Bitdefender driver ignis.sys In this example, the CPU usage comes from the file rtsuvc.sys which seems to be the Realtek UVC webcam Driver In this demo, the driver iai2ce.sys (Intel Serial IO GPIO Controller driver) causes it: This also hurts performance a lot and causes high SYSTEM usage. When you see calls like ntoskrnl.exe! ViKeTrimWorkerThreadRoutine, ntoskrnl.exe!Mm VerifierTrimMemory, ntoskrnl.exe! VerifierKeLeaveCriticalRegion, this means you have Driver Verifier enabled. In the following demo, the CPU usage comes from the Realtek NIC driver: In this demo, the CPU usage comes from the nVIDIA driver. Inside WPA, load the debug symbols and expand Stack of the SYSTEM process. Now analyze the generated ETL file with the Windows Performance Analyzer by dragging and dropping the CPU Usage (sampled) graph to the analysis pane and ordering the columns like you see in the picture: Now run WPRUI.exe, select First Level, under Resource select CPU usage and click on start. If you still use Windows 7, use the SDK/WPT with Build 15086. The Windows 10 WPT can be used on Windows 8/Server 2012, Windows 8.1/Server 2012R2 and Windows 10/Server 2016. To capture the data, install the Windows Performance Toolkit, which is part of the Windows SDK. To diagnose the CPU usage issues, you should use Event Tracing for Windows (ETW) to capture CPU Sampling data / Profile. This is why diagnosing the specific culprit can require a bit of detective work as described below. The System process loads (or hosts) multiple hardware drivers from different vendors that require higher level of memory access. High CPU usage by the "System" process can often be caused by a hardware driver issue (bug, old version, incompatility etc). From the system start, it is using like 5% of the CPU only, but after 2-4 hours of working it is growing up and reaching 40-60% of the CPU usage. Sometimes CPU usage is reaching 90%, but the average usage is like 40-65%.Īs the user below posted a great answer, I have noticed that the process that is eating the most CPU in the system is called Arthurx.sys, simple google tells that it's a TPLink driver (an wifi adapter, I have bought like 2 weeks ago!) drivers has been installed from the Windows MSDN, but also tried to install the drivers from the attached CD, but it doesn't help. You can see the problem itself and running processes in the screenshot below: If you have suggestions for the sidebar, let us know! We're always looking for great resources.I have noticed that from some time my system is freezing and its probably caused by the high CPU usage which is caused by the system process.Īll applications I'm running is the Skype, TeamSpeak and Chrome so it definitely shouldnt eat that amount of CPU.
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