[SOLVED] High CPU load when viewing LL forums. - Printable Version

[SOLVED] High CPU load when viewing LL forums. - Printable Version

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[SOLVED] High CPU load when viewing LL forums. - justme2 - 09-27-2015

Running LL2.6.
When viewing the forums anonymously (with the dark theme), my cpu runs hot, cycling between 5% up to 100% CPU usage and the fan runs fast with either Firefox or Chrome browsers. The PC behaves like a fan heater! When I log in, I use the lighter Curve theme as my default and the CPU usage drops to around 15% to 20%. The PC runs cooler and the fan slows down. Other websites seem to run at around 5% CPU, so what is going on in the LL forum and does anyone else have this problem or know the cause or cure?

Edit: High CPU load seems to occur when viewing the forum home page.

Re: [SOLVED] High CPU load when viewing LL forums. - rokytnji - 09-27-2015

Only 11% for me. Try running firefox in safe mode. I am guessing a addon is te culprit here.

http://www.makeuseof.com/tag/how-to-use-mozilla-firefox-in-safe-mode/

Re: [SOLVED] High CPU load when viewing LL forums. - justme2 - 09-28-2015

(09-27-2015, 11:40 PM)rokytnji link Wrote: Only 11% for me. Try running firefox in safe mode. I am guessing a addon is te culprit here.

http://www.makeuseof.com/tag/how-to-use-mozilla-firefox-in-safe-mode/

Thanks, I don't think I have any addons installed but will check later. I have discovered the same problem exists viewing the home page in windows/chrome too but only using the dafault dark theme.

The News Feed does not show in the Curve theme so I guess the changing feed is perhaps the cause.

Re: [SOLVED] High CPU load when viewing LL forums. - Valtam - 09-28-2015

(09-28-2015, 09:26 AM)justme2 link Wrote: have discovered the same problem exists viewing the home page in windows/chrome too.

In that case, we'd need to see your system specs too. Sounds like you have low end hardware.

Re: [SOLVED] High CPU load when viewing LL forums. - justme2 - 09-28-2015

(09-28-2015, 09:29 AM)Jerry link Wrote: [quote author=justme2 link=topic=2330.msg17642#msg17642 date=1443432397]
have discovered the same problem exists viewing the home page in windows/chrome too.

In that case, we'd need to see your system specs too. Sounds like you have low end hardware.
[/quote]

Windows PC has 2GB ram and 2.66GHz pentium 4 cpu
Netbook has 1GB ram and 1.2GHz Intel atom cpu

My latest finding is that shrinking the News feed panel on the home page reduces the cpu load to a range around 7% to 20% so at least I now know how to keep the CPU cooler!

Re: [SOLVED] High CPU load when viewing LL forums. - avj - 09-28-2015

I also notice higher cpu usage on the forum home page, which corresponds with the changing news feed. I disabled all add ons in chrome and tried with the same results. I am including a screenshot of the resource monitor showing two minutes of forum viewing, the first minute was viewing the home page and the second minute is viewing this topic.

[Image: o9suhxU.png]

[Image: o9suhxU.png]

This is my hardware info.

Code:

inxi -Fxx

System:    Host: AOA150-1777 Kernel: 3.13.0-24-generic i686 (32 bit, gcc: 4.8.2) 

           Desktop: Xfce 4.11.8 (Gtk 2.24.23) dm: lightdm Distro: Ubuntu 14.04 trusty

Machine:   System: Acer product: AOA150 version: 1

           Mobo: Acer model: N/A Bios: Acer version: v0.3310 date: 10/06/2008

CPU:       Single core Intel Atom CPU N270 (-HT-) cache: 512 KB flags: (nx pae sse sse2 sse3 ssse3) bmips: 3192.03 

           Clock Speeds: 1: 1600.00 MHz 2: 1600.00 MHz

Graphics:  Card: Intel Mobile 945GSE Express Integrated Graphics Controller bus-ID: 00:02.0 chip-ID: 8086:27ae 

           X.Org: 1.15.1 drivers: intel (unloaded: fbdev,vesa) Resolution: [email protected], [email protected] 

           GLX Renderer: Mesa DRI Intel 945GME x86/MMX/SSE2 GLX Version: 1.4 Mesa 10.1.3 Direct Rendering: Yes

Audio:     Card: Intel NM10/ICH7 Family High Definition Audio Controller 

           driver: snd_hda_intel bus-ID: 00:1b.0 chip-ID: 8086:27d8 

           Sound: Advanced Linux Sound Architecture ver: k3.13.0-24-generic

Network:   Card-1: Realtek RTL8101E/RTL8102E PCI Express Fast Ethernet controller 

           driver: r8169 ver: 2.3LK-NAPI port: 3000 bus-ID: 02:00.0 chip-ID: 10ec:8136

                Card-2: Qualcomm Atheros AR242x / AR542x Wireless Network Adapter (PCI-Express) 

           driver: ath5k bus-ID: 03:00.0 chip-ID: 168c:001c

Drives:    HDD Total Size: 410.1GB (26.2% used)

           1: id: /dev/sda model: WDC_WD1600BEVT size: 160.0GB serial: WD-WXE908UP2087 

           2: USB id: /dev/sdb model: FreeAgent_Go size: 250.1GB serial: 2GE20QLB-0:0 

Partition: ID: / size: 146G used: 101G (73%) fs: ext4 ID: swap-1 size: 1.06GB used: 0.27GB (25%) fs: swap 

RAID:      System: supported: N/A

           No RAID devices detected - /proc/mdstat and md_mod kernel raid module present

           Unused Devices: none

Sensors:   System Temperatures: cpu: 57.0C mobo: N/A 

           Fan Speeds (in rpm): cpu: N/A 

Info:      Processes: 169 Uptime: 3:51 Memory: 446.2/988.7MB Runlevel: 2 Gcc sys: 4.8.4 

           Client: Shell (bash 4.3.11 running in x-terminal-emul) inxi: 1.9.17

Hiding the news feed header solves this problem for me.

Re: [SOLVED] High CPU load when viewing LL forums. - justme2 - 09-28-2015

Thanks avj, you have provided the evidence I did not have time to prepare, before you posted. The news feed is obviously the cause of problem. In my case it was exacerbated by the fact that I usually kept the home page open and viewed posts in another tab, so the CPU load was always nearly 100% - hence the heat generated. Shrinking the News Feed panel on the home page reduces the cpu loading dramatically.

Re: [SOLVED] High CPU load when viewing LL forums. - Wirezfree - 09-28-2015

It appears this is a common issue, not just LL website, just have a Google around.
Depending on your H/W, you may just never have noticed it...
I do remember on my old PC, with WinXP, Chrome with 6 tabs used to run CPU to 70~80%

Re: [SOLVED] High CPU load when viewing LL forums. - Valtam - 09-29-2015

I've disabled the fader for now as a test and it has reduced cpu here. How does the news block look?

Re: [SOLVED] High CPU load when viewing LL forums. - avj - 09-29-2015

Looks fine to me. My cpu still goes to about 90% when the feed changes.