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System configuration [Linux-Sound] - Linux Audio
https://wiki.linuxaudio.org/wiki/system_configuration
The term threaded IRQ is quite an abstract one but what it boils down to is that every peripheral gets an IRQ and the Linux kernel splits this IRQ in different parts of which the so-called bottom-halve is of concern in the context …
AudioLinux - The audiophile realtime plug & play operative ...
http://www.audio-linux.com/
To install audiolinux on external USB stick (32 GB) or internal Hard disk, if you already have linux installed in internal drive or in external media (liveCD or liveUSB, for Ubuntu you can install this way and omit stage 2): 1) Boot from your linux …
The Linux Sound HOWTO: Installation
http://web.mit.edu/linux/redhat/redhat-4.0.0/i386/doc/HTML/ldp/Sound-HOWTO-4.html
Configuring Linux to support sound involves the following steps: Installing the sound card. Configuring and building the kernel for sound support. Creating the device files. Booting the Linux kernel and testing the installation. The next sections will cover each of these steps in detail. 4.1 Installing the Sound Card.
Linux generic IRQ handling — The Linux Kernel …
https://www.kernel.org/doc/html/v4.12/core-api/genericirq.html
Rationale¶. The original implementation of interrupt handling in Linux uses the __do_IRQ() super-handler, which is able to deal with every type of interrupt logic. Originally, Russell King identified different types of handlers to build a quite universal set for the ARM interrupt handler implementation in Linux 2.5/2.6.
REALTIME PRIORITY - AudioLinux
http://www.audio-linux.com/html/realtime.html
In Audiolinux realtime priority is assigned by 2 services: rtirq for irq priority and rtapp for application priority. 1) RTIRQ configuration. The default configuration file is /etc/rtirq.conf The important section is this one RTIRQ_NAME_LIST="xhci" In the default configuration it will give the defined priority to xhci usb devices.
Implementation of Interrupt Handler (IRQ) in Linux kernel ...
https://lynxbee.com/implementation-of-interrupt-handler-irq-in-linux-kernel-driver/
The Simple makefile to compile this driver on Linux laptop is as follows, obj-m += interrupt.o all: make -C /lib/modules/$ (shell uname -r)/build M=$ (PWD) modules clean: make -C /lib/modules/$ (shell uname -r)/build M=$ (PWD) clean. Compile the driver as, $ make. $ sudo insmod ./interrupt.ko interrupt_name=somename irq=30.
Linux generic IRQ handling — The Linux Kernel …
https://www.kernel.org/doc/html/latest/core-api/genericirq.html
unsigned int irq. The linux irq number. Return. A snapshot of the current state. bool irq_check_status_bit (unsigned int irq, unsigned int bitmask) ¶ Check whether bits in the irq descriptor status are set. Parameters. unsigned int irq. The linux irq number. unsigned int bitmask. The bitmask to evaluate. Return. True if one of the bits in ...
What is an IRQ? — The Linux Kernel documentation
https://www.kernel.org/doc/html/latest/core-api/irq/concepts.html
An IRQ is an interrupt request from a device. Currently they can come in over a pin, or over a packet. Several devices may be connected to the same pin thus sharing an IRQ. An IRQ number is a kernel identifier used to talk about a hardware interrupt source. Typically this is an index into the global irq_desc array, but except for what linux/interrupt.h implements the details are …
Interrupt request (IRQ) | Linux#
https://geek-university.com/linux/irq-interrupt-request/
An interrupt request (IRQ) is a hardware signal sent to the processor instructing it to suspend its current activity and handle some external event, such as a keyboard input or a mouse movement. In x86 based computer systems, IRQs are numbered from 0 to 15. Newer computers, including x86-64 systems, provide more than these 16 interrupts (usually 24).
Troubleshooting Linux Sound
http://troubleshooters.com/linux/sound/sound_troubleshooting.htm
lspci -v | grep -B1 -A12 -i audio. If you don't see evidence of the sound card in that output, your sound card is probably bad, or it's not a PCI soundcard (perhaps it's USB?). Unless you're sure it's a PCI soundcard, just to rule out the possibility of a non-PCI soundcard, execute this command: sudo lshw | grep -B4 -A10 -i audio
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