Questions tagged [irq]
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Do linux kernel threads run in process context?
I'm aware of Linux softirqs may run within specific per-cpu kernel thread context -- ksoftirqd/[cpu_id].
Kernel threads are similar to user-space threads, however they only execute kernel code in ...
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Is SMI the same as managed IRQs? How can I know if a IRQ is a managed IRQ?
On the IRQ affinity tuning subject. I've realized that some IRQs cannot be reassigned to other cores.
I've read[1] that those are called "managed IRQs". On the Linux Foundation wiki, I've ...
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IRQ Latency and CPU Use
I am running a system with RT-Preempt kernel v6.4.8-rt8
CPU is 12th Gen Intel(R) Core(TM) i7-12800HE
This system is receiving data through the CAN Bus. Every 1 millisecond a burst of 3 messages is ...
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Dell 3620 only boots with nolapic kernel parameter since upgrade to 6.8.12
I have a 3-node proxmox cluster running at home with Dell Precision 3620 computers, all interconnected by:
05:00.0 Ethernet controller: Mellanox Technologies MT27520 Family [ConnectX-3 Pro]
...
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Wondering about my `top` output = IRQ (nvidia, iwlwifi)
I am deeply wondering about this top (man page) output in uptime 5 hours 30 minutes only:
top - 00:41:41 up 5:48, 1 user, load average: 0.36, 0.44, 0.63
Tasks: 281 total, 1 running, 280 sleeping, ...
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Can't solve booting issue----irq 7: nobody cared (try booting with the "irqpoll" option)?
Linux version info:
uname -a
Linux debian 5.10.0-22-amd64 #1 SMP Debian 5.10.178-3 (2023年04月22日) x86_64 GNU/Linux
The message always shown on my booting :
sudo dmesg | grep "irq 7"
[ 2....
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HP Pavilion x360 Convertible, installing Linux, endless IRQ and logging loop
When installing a Linux OS (e.g. Mint) from a live cd or USB stick, editing /etc/default/grub does not solve the problem. You can add or edit a line like
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash ...
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Linux: e1000e NIC crashes "randomly" with 'transmit queue 0 timed out'
I am running Debian bullseye on a (2nd hand) bare metal server, which crashes occasionally (happened 3 times with the course of 8 days now) and I can't seem to figure out why. I haven't found ways to ...
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Should the irqbalance daemon be used on a modern desktop x86 system?
Today I've read this opinion however I don't understand the topic of interrupts at all, so it would be nice if knowledgeable people chimed in and explained the rationale behind using this daemon in ...
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Writing a kernel driver - knowledge of specific interrupt pins
I don't have knowledge about writing Linux kernel modules / drivers.
Let's take a basic example. I have an input device of my own which is connected to a microcontroller on one of the interrupt pins. ...
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Does the worst PCIe MSI interrupt latency jitter over 100us normal?
I try to figure out the values of interrupt jitter in Linux, especially in the worst cases.
Two testbeds are considered, one is Raspberry Pi 4B, the other is a high-end PC with an intel i9 CPU and ...
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Maximum serial port speed in Linux
I installed a brand new xr17v358 serial card, which claims 25Mbps maximum. (For some reason this was the only card I could find that didn't top out at 1950s speeds. I'll settle for 1970s speeds in ...
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Give user permission to change priority of an IRQ/root process
Is it possible, in Linux, to allow an user to change the priority of a process owned by root? More specifically an IRQ process?
For an embedded real-time application I want to raise the priority of ...
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"Diabling IRQ #9" error at boot in manjaro linux
Whenever i start my pc. I see this error "Disabling IRQ #9". I only have manjaro on my pc (no dual boot) and wanted to know the cause behind this problem. Sudo systemctl returns no error but ...
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How to monitor conflicts at serial/CPU level between usb sensors, serial transmission and UDP streaming
I have a ARM64 board running Ubuntu 18. The board runs a Python script that does the following:
acquire data from a USB camera and a USB microphone
process the data and send the result to an external ...