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User who did this - Michael (hede)
Attached to Project - awesome
Summary - awful.widget.graph higher CPU Load with awesome 3.5
Task Type - Bug Report
Category - Widgets
Status - Unconfirmed
Assigned To -
Operating System - Linux
Severity - Low
Priority - Normal
Reported Version - 3.5.1
Due in Version - Undecided
Due Date - Undecided
Details - I'm still using awesome 3.4 here because of the higher CPU load with
awesome 3.5 in awful.widget.graph and/or vicious, in awesome 3.5 they do need
more cpu cycles than with awesome 3.4.
I do have a cpuwidged declared in rc.lua
this is the same in 3.4 and 3.5:
cpuwidget = awful.widget.graph()
vicious.register(cpuwidget, vicious.widgets.cpu, "$1")
additionally in awesome 3.4 rc.lua:
mywibox[s].widgets = {
[...]
cpuwidget.widget,
[...]
}
additionally in awesome 3.5 rc.lua:
local right_layout = wibox.layout.fixed.horizontal()
[...]
right_layout:add(cpuwidget)
(... 3.5 lua code changed ... you know ...)
Viewing "top" with Awesome 3.4 -> the awesome process needs below 0.5 %CPU load
if in the top list at all.
Viewing "top" with Awesome 3.5 -> the awesome process needs ca. 3 %CPU.
I didn't tested it, but I'm sure powertop will show much more wakeups with 3.5
than with 3.4.
I removed the cpuwidget in 3.5 and it also remains at <1%. I did add a second
graph and the cpu load climbs even higher than 5%.
I've found a simple bash script for collecting CPU Load values. This way there
are many process forks (bash itself, /usr/bin/sleep, etc.) but this bash
scripting solution is consuming even less ressources than awesome(3.5)+vicious.
In my eyes this is a big regression. I've downgraded to Awesome 3.4 for now.
If I do not register any vicious widget with awesome but running graph updates
via awesome-client then 3.4 is fine where 3.5 has higher CPU load / consumes
more CPU cycles.
i.e. in rc.lua:
cpuwidget = awful.widget.graph()
-- vicious.register(cpuwidget, vicious.widgets.cpu, "$1", 2)
cpuwidget:add_value(0.5)
using a shell:
while /bin/true; do echo "cpuwidget:add_value(0.5)" | awesome-client ; sleep 2;
done
results in ~0% CPU load with awesome 3.4 and ~3% CPU load with awesome 3.5.
(1.6 GHz Intel Core here)
So there's still some regression with awesome 3.5.1-1 and it seems vicious is
not the reason. But I do not know.
More information can be found at the following URL:
https://awesome.naquadah.org/bugs/index.php?do=details&task_id=1166
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