alphaOS 8 - eating up cpu...

Post your comments, questions, bug reports or suggest new features for alphaOS
john3voltas
Expert
Posts: 266
Joined: 19 May 2013, 21:53

alphaOS 8 - eating up cpu...

Postby john3voltas » 12 Jul 2013, 01:37

Today while testing the wifi on 8.0 I found a different issue.
When I boot up 8.0 (no savefile) and let it finish boot-up, I notice that my CPU is being used (~15%).
Take a look at it:
Image
(if you can't see the whole picture, right-click it and choose "view image")

Take a look at conky: says 17% and the graph shows that the cpu activity has an history similar to 17%.
Now look at ArchPup after booting up:
Image
(if you can't see the whole picture, right-click it and choose "view image")

There. Cpu at 1% and conky shows it has been like that for a while.
Can anyone else replicate this behavior?
Cheers

Marv
Proficient
Posts: 81
Joined: 16 May 2013, 16:42

Re: alphaOS 8 - eating up cpu...

Postby Marv » 12 Jul 2013, 03:03

Hi John,

2.4GHz core 2 duo laptop, pristine boot of 8.0 to check cpu use as reported by conky. No save file, no setup done. With no governor installed, both cpus at 2.4GHz, I see a cpu use for each at idle of 0.5%. With my conservative governor installed and both CPUs at 0.8GHz, the reported cpu use at idle rises to 1%. This is in line with what I see in alphaOS 6.0 with the 3.8.3 kernel and with fatdog64, which uses a 64bit 3.8.7 kernel. That's about as good as it gets on this laptop. For comparison, the linas with 3.2.13 kernel, come in about 5% with governor, Lighthouse64 with the same kernel as fatdog64 !!! at 5% also, Tinted slacko with a 3.2.33 kernel higher at 7% to 8%, and boxpup 412 with a 2.6.25.16 kernel at also on the high end at roughly 8 to 10%.

Sorry I don't replicate your 8.0 numbers. Surprises in my numbers for me were:
That fatdog64 matched alphaOS 6.0, my previous coolest cucumber.
That LH64, same kernel as fatdog64, used much more cpu at idle.
That tinted was as high as it was wrt the linas and pretty much the same as the old 2.6.25.16 kernel boxpup 4.12 with very little cpu finesse. Edit: My guess is that some of this is probably panel related.

All of my laptops at this point are Fujitsu lifebooks with all intel cpus, video, wireless, and glue for what is's worth

All the above numbers are on the same laptop and checked multiple times over a timeframe of weeks with the exception of boxpup, just a quick look.

I have seem fairly high cpu use on both 7.0 and 8.0 after thrashing about in pwireless2 trying this and that to connect. When that occurred, a simple restart of X brought it back to normal.

toastily...or non-toastily,

Jim

simargl
Site Admin
Posts: 466
Joined: 16 May 2013, 10:54
Contact:

Re: alphaOS 8 - eating up cpu...

Postby simargl » 12 Jul 2013, 07:13

Here is my htop screenshot - with firefox running system uses just 130MB of RAM and 2%CPU. Kworker process has high CPU usage in your screenshot, there are many reports about that issue with newer kernel.
http://sudoremember.blogspot.com/2013/05/high-cpu-usage-due-to-kworker.html

Image
(click to enlarge)

john3voltas
Expert
Posts: 266
Joined: 19 May 2013, 21:53

Re: alphaOS 8 - eating up cpu...

Postby john3voltas » 12 Jul 2013, 16:39

Hi guys.
Just for the record, I just tried with both alphaOS 6 and 7 and neither of these show the kworker/cpu eating behavior.
Cheers

simargl
Site Admin
Posts: 466
Joined: 16 May 2013, 10:54
Contact:

Re: alphaOS 8 - eating up cpu...

Postby simargl » 12 Jul 2013, 17:23

john3voltas wrote:Hi guys.
Just for the record, I just tried with both alphaOS 6 and 7 and neither of these show the kworker/cpu eating behavior.
Cheers

That's interesting, then we can say almost for sure that eudev is cause of high cpu usage with kworker.

john3voltas
Expert
Posts: 266
Joined: 19 May 2013, 21:53

Re: alphaOS 8 - eating up cpu...

Postby john3voltas » 12 Jul 2013, 18:03

simargl wrote:That's interesting, then we can say almost for sure that eudev is cause of high cpu usage with kworker.

Interesting to see that it does not affect every PC running 8.0. :shock:
I mean, here at home if afects both my laptop and my wife's netbook but apparently Marv and you don't see such issues on your hardware.
Cheers

john3voltas
Expert
Posts: 266
Joined: 19 May 2013, 21:53

Re: alphaOS 8 - eating up cpu...

Postby john3voltas » 04 Oct 2013, 21:37

IIRC this got fixed in 9 or 10.
Surely it was ok in 10.
Now it's back in 11 :(
alphaos-20131004222452.png
kworker eating cpu - conky closeup


Take a look at my conky
alphaos-20131004222624.png
kworker eating cpu - desktop


Return to “General Discussion”

Who is online

Users browsing this forum: No registered users and 18 guests

cron