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tune usb irq (dwc3) based on usb function

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This among other things greatly increases tethering performance.

Bug: 185092876
Test: TreeHugger, built and booted on an oriole, enabled tethering
Signed-off-by: Maciej Żenczykowski <maze@google.com>
Change-Id: Ic9f0b4bef05250bb38c91dc1e046366098d98dc0
This commit is contained in:
Maciej Żenczykowski 2021-06-25 11:42:01 -07:00 • committed by Maciej Zenczykowski
parent ed651c86bf
commit a24469c9d0
4 changed files with 29 additions and 0 deletions
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16
set_usb_irq.sh Executable file
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@ -0,0 +1,16 @@
#!/vendor/bin/sh
# Switch into /proc/irq/$IRQ for the dwc3 usb controller
cd /proc/irq/*/dwc3/.. || exit 7
# Move the USB Controller (DWC3) interrupt as requested
# Modem and DIT are on 0/2/5 depending on throughput, so avoid those.
# 0-3 small, 4-5 medium, 6-7 big
case "$1" in
medium) core=4;;
big) core=6;;
*) core=0;;
esac
# This can sometimes fail due to smp_affinity_list no longer existing...
echo "${core}" > smp_affinity_list