Questions tagged [interrupts]
The interrupts tag has no usage guidance.
28
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Will a USB 2.0 LAN Adapter work with interrupts instead of polling if i plug it on a USB 3.0 port?
I have a LAN Adapter (HORI LAN Adapter for Nintendo Switch) that has the ASIX AX88179 USB 3.0 chipset, but it's USB 2.0.
(I checked the cable plug and it doesn't have the USB 3.0's extra pins, also ...
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System interrupts causing high CPU usage
I purchased a Lenovo ThinkPad Helix 2 2-in-1 laptop/tablet second-hand around a month ago, it came with Windows 10 Pro and was working OK for a few weeks but recently I have had a problem with ...
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Where are hardware interrupt handlers stored?
I've been doing some research on interrupts and it seems that pointers to software interrupt handlers are located in the first 1024 bytes of memory. I haven't been able to find anything about the ...
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Wifi disconnects when System process takes lot of CPU
I have Windows 10 in my laptop. Suddenly, the System process is taking up more CPU and also the System Interrupts process starts.
When it happens, my wifi connection gets disconnected and it shows &...
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How can I clear core0 of any interrupts?
So by default windows is using core 0 for most driver work, for some reason it prefers that core over the others.
With interrupt affinty policy tool, I can move some of the devices using core0 for ...
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A suspected Windows audio driver interrupt issue
I have a projector connected to my PC via HDMI, which receives 1920x1080 59.94 Hz.
The projector has a frame interpolation feature, but to run it completely smoothly it needs all frames to arrive in ...
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What is the hardware source of Kernel Clock?
According to docs of my South Bridge (ICH9M) it has 4 HPET. How should I found interrupt line, from which System Clock (aka Kernel Clock, Software Clock) is derived?
Seems that it is LOC, but which ...
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Windows laptop going to sleep interrupts wifi for other users
I have two Windows 10 laptops in my house. When they are closed (sleep), they often interrupt the wifi for the rest of us on our phones or other devices. I've disabled network sharing on those two ...
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NMI error is received in centos 6.0
I have CentOS 6.0 installed with the kernel version 2.6.32-220.el6.x86_64. I'm getting this error since today. Until this morning everything was ok. Please tell me how could I resolve it.
system ...
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Usb wireless adapter causing DPC spikes
Bought 2 new TP-LINK WN722N USB wirless adapters as they were the highest rated on Newegg and were a great price. Both of them cause abnormally high DPC & Interrupt usage in Process Explorer and ...
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Configure properly irqbalance to improve the network traffic
I have a debian 12 machine that gets a lot of softirqs
by calling cat /proc/softirqs
NET_RX on CPU1 is huge compared to CPU0
I would like to assign the irqs on both cores by using the switch on ...
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dmesg: `PME: Spurious native interrupt!`
I am running Linux debian 6.1.0-18-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.1.76-1 (2024-02-01) x86_64 GNU/Linux (and dual-booting Windows 11, fast boot is turned off) and I see this line in my dmesg ...
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High "System interrupt" CPU % in Windows 10 Task manager, linked to ACPI.sys, if and only if a serial port device is connected
I see a 20% "System interrupt" CPU usage in the Windows 10 task manager if and only if a device is connected to the PC with serial port.
With the "LatencyMon" tool, I can see this ...
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How to change process termination shortcuts in a terminal on Windows?
On Windows to close a program, CTRL+C does not always work (eg: ping).
To close anything immediately, CTRL+BREAK can be used.
The problem I have is that on my Dell laptop, there is no BREAK key, Fn+S ...
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Linux high cpu usage - htop shows 90% to 100% cpu usage
I installed a fresh Manjaro Linux on my laptop and it works okay but I noticed high CPU usage when i ran the htop command. One of the cores were constantly busy near 100% and the 2nd one was around 90%...
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Does critical event caused by RadeonSettings.exe mean Nvidia GPU card has hardware fault?
I have been getting "System Interrupts" a few times every day on my Windows 10 PC. This is slowing down my PC and is getting irritating. From the reliability history (see screenshot below), ...
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Radeon settings causes system interrupts despite using Nvidia GPU
I am using Windows 10, AMD Ryzen 7 2700x CPU and Nvidia GPU. Lately, my desktop PC has been slowed down intermittently by system interrupts. From reliability history, I discovered that this was caused ...
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how to enable MSI-X support for NIC?
I want to utilize the MSI-X functionality of my NIC but its not getting enabled. As you can see below, MSI-X capability is there but disabled. How to enable this?
# lspci -v
00:00.0 PCI bridge: ...
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Do system calls in x86_64 linux still generate interrupts?
In older versions of linux architecture, system calls would always generate an interrupt during their execution. They would be executed by setting the system call number into %eax and parameters into %...
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How does cpu gets interrupted by APIC and how to handle shared interrupts?
From the very little knowledge i have, every PCI device has 4 interrupt pins. Pins from the many different PCI devices on the motherboard (Built-in or external devices) are routed to an IO-APIC (...
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System tick timer interrupt priority and blocked interrupts
Assume we have an OS that is running on a CPU which is fully compatible with its requirements. This OS is tick driven. System tick interrupt arrive from external timer (periodic mode) which is ...
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Is latency from hardware interrupts a hardware, driver or kernel issue?
Being a power user I have spent countless hours tuning systems, checking DPC latency blah blah
All of this begs the question why are we still dealing with these issues? I personally can't tell if ...
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What should I do if my system interrupts goes over 20% of my computer?
My computer has been stuttering and going all over the place forever, and I found out recently that it was because my system interrupts kept going all over the place, what should I do?
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how does processor come to know that IRQ or FIQ occur and how it changes to a specific interrupt request mode ?
Suppose processor is in user mode and IRQ occur then its changes to IRQ mode.
But user mode does't have write access to control field of cpsr then how the mode is changed ?
May be i am wrong, Please ...
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What can I do to investigate 50% CPU on Interrupts?
My PC suddenly became very slow.
In my Process Explorer, I noticed that it consistently spends 50% of CPU in "Interrupts" process.
I googled around and found that one possible solution is to go into ...
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Virtual IRQ's and what they do
I'm surprised but from what I can find there is very little good information on what these really are. Some say they are actually virtual (software interrupts) some say hardware, and a lot say stuff ...
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Interrupt Descriptor Table and System Call Table?
Anyone please help me find out the relation between these two. Read somewhere that
"The IDT is initialized one first time by the BIOS routine but Linux does it one more time when it take control."
...
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Send an interrupt to the kernel form shell
I am writing a linux module, and I want to test it, so right now it should be triggered when an interrupt happens, so before testing it for real, I want to send the interrupt by hand and see what ...
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