[FS#3708] rssileds: high CPU load

[OpenWrt Bugs]

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A new Flyspray task has been opened.  Details are below. 

User who did this - everloop2 (everloop2) 

Attached to Project - OpenWrt/LEDE Project
Summary - rssileds: high CPU load
Task Type - Bug Report
Category - Base system
Status - Unconfirmed
Assigned To - 
Operating System - All
Severity - Medium
Priority - Very Low
Reported Version - All
Due in Version - Undecided
Due Date - Undecided
Details - see: [[https://github.com/Freifunk-Spalter/packages/issues/142|CPE210 high cpu load bug still present
]]

Device problem occurs on:

ath79: CPE2xx, CPE5xx, maybe a major - think other devices too.

OpenWrt 19.07 - Steps to reproduce:

Bug is reproducible:
(for measurement did logout LuCI, then ssh & top)

Freifunk images	-> after FFwizard+reboot -> CPU ~35%
-> set rssi (default: wlan0) to wlan0-dhcp2 or wlan0-mesh-2 in /etc/config/system	-> CPU ~5%

Openwrt stock (19.07.7), firstboot, wifi:
-> AP disabled (default setting) -> CPU ~2%
-> AP enabled -> CPU ~4%
!!! -> AP disabled again -> CPU ~20%
-> AP enabled again -> CPU ~4%
-> AP + WWAN + Mesh -> CPU ~5%
!!! -> disabled everything (AP, WWAN, Mesh) -> CPU 15-25%
-> enabled only one AP, WWAN or Mesh -> CPU ~5%

If rssileds is disabled at boot, high CPU load doesnt occur.

top always shows /usr/sbin/rssileds 2% CPU
-> AP enabled	->   0% sys
!!! -> AP disabled -> 14% sys

top AP disabled:
-> CPU:   4% usr  14% sys   0% nic  81% idle   0% io   0% irq   0% sirq

More information can be found at the following URL:
https://bugs.openwrt.org/index.php?do=details&task_id=3708

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