Raising IRQ priority of device threads

low-latency_rt.sh

#!/bin/bash

# Sorted view:
# ps -eLo rtprio,cls,pid,pri,nice,cmd | grep "FF" | sort -r

# ps -eLo pid,cls,rtprio,pri,nice,cmd | grep -i "irq"

# For a non-RT kernel, use kernel option: threadirqs

# http://subversion.ffado.org/wiki/IrqPriorities
# http://alsa.opensrc.org/Rtirq

#piwl=$(pgrep "irq/.*-iwlwifi")
#[[ -n $piwl ]] && chrt -f -p 10 $piwl

#peth=$(pgrep "irq/.*-eth0")
#[[ -n $peth ]] && chrt -f -p 30 $peth

#peth=$(pgrep "irq/.*-eth1")
#[[ -n $peth ]] && chrt -f -p 30 $peth

peth=$(pgrep "irq/.*-eth")
[[ -n $peth ]] && chrt -f -p 75 $peth

# ehci instead of uhci
pmouse=$(pgrep "irq/23-ehci")
[[ -n $pmouse ]] && chrt -f -p 79 $pmouse

pmouse=$(pgrep "irq/20-ehci")
[[ -n $pmouse ]] && chrt -f -p 79 $pmouse

#pmouse=$(pgrep "irq/19-uhci")
#[[ -n $pmouse ]] && chrt -f -p 59 $pmouse

# ehci instead of uhci
pkey=$(pgrep "irq/23-ehci")
[[ -n $pkey ]] && chrt -f -p 79 $pkey

pmouse=$(pgrep "irq/20-ehci")
[[ -n $pkey ]] && chrt -f -p 79 $pkey

psnd=$(pgrep "irq/.*-snd_")
[[ -n $psnd ]] && chrt -f -p 85 $psnd

#pnouveau=$(pgrep "irq/.*-nouveau")
#[[ -n $pnouveau ]] && chrt -f -p 80 $pnouveau

pnvkm=$(pgrep "irq/.*-nvkm")
[[ -n $pnvkm ]] && chrt -f -p 84 $pnvkm

pnvkm=$(pgrep "irq/.*-i915")
[[ -n $pi915 ]] && chrt -f -p 84 $pi915

pnvidia=$(pgrep "irq/.*-nvidia")
[[ -n $pnvidia ]] && chrt -f -p 84 $pnvidia


#pkbd=$(pgrep "irq/.*-i8042")
## 2 of them
#for p in $pkbd ; do
#   chrt -f -p 60 $p
#done

prtc=$(pgrep "irq/.*-rtc0")
[[ -n $prtc ]] && chrt -f -p 90 $prtc

#( while true ; do 
#   # Does not have an IRQ until Xorg is running
#   pnvidia=$(pgrep "irq/.*-nvidia")
#   if [[ -n $pnvidia ]] ; then
#      chrt -f -p 80 $pnvidia
#      break
#   fi
#   sleep 20
#done ) &