plasmashell :very high usage CPU after snapshot 20170618

phil524 · June 20, 2017, 8:55am

Hello,

Since the last snapshot op tumbleweed (20170618) installed via “zypper dup”, I see via top, a very high CPU usage by the Plasmashell:

login + start top in konsole → 33%
starting thereafter seamonkey → 66%
starting Pysol → 96%
starting gimp → 137%
After exiting gimp → 139%
6 After exiting pysol → 139%
starting libreoffice writer → 144%
After closing libreoffice → 144%

So the usage doesn’t diminish when the programs are closed

Xorg also uses a lot of CPU: 60-68%

hardware: HP proliant with nvidia quadro 4100P, Driver:nouveau
the last snapshot contained also a new kernel: difficult to say if this problem is related to the nouveau driver or plasmashell itself

I’m pretty sure that this was not the case before this snapshot and I don’t remember that I changed something in the settings

top - 08:33:40 up 10:51,  3 users,  load average: 1.75, 1.82, 1.77
Tasks: 290 total,   3 running, 287 sleeping,   0 stopped,   0 zombie
%Cpu(s):  5.4 us,  8.8 sy,  0.0 ni, 85.1 id,  0.0 wa,  0.0 hi,  0.0 si,  0.7 st
KiB Mem : 15965580 total, 12184624 free,  1234908 used,  2546048 buff/cache
KiB Swap: 12585980 total, 12585980 free,        0 used. 14523608 avail Mem 

  PID USER      PR  NI    VIRT    RES    SHR S   %CPU  %MEM     TIME+ COMMAND                                                                                 
 1172 philippe  20   0 4861476 244576 113832 R 145.02 1.532  48:46.82 plasmashell                                                                           
  968 root      20   0  438544 108620  54172 R 66.932 0.680  23:10.00 Xorg                                                                                   
 1927 philippe  20   0 2041828 486500 112792 S  3.386 3.047   4:11.24 seamonkey                                                                               
  509 root      20   0   12056   4600   1476 S  1.394 0.029   8:18.14 haveged                                                                                 
 1787 philippe  20   0  810928  87396  74076 S  1.195 0.547   0:28.82 konsole

Do you see the same?

Many thanks in advance
Philippe

Cris70 · June 20, 2017, 9:10am

Same here, CPU usage very high!

top - 09:08:37 up 42 min,  2 users,  load average: 1,24, 1,28, 1,21
Tasks:** 271 **total,**   3 **running,** 268 **sleeping,**   0 **stopped,**   0 **zombie
%Cpu(s):** 16,5 **us,** 10,0 **sy,**  0,0 **ni,** 73,5 **id,**  0,0 **wa,**  0,0 **hi,**  0,0 **si,**  0,0 **st
KiB Mem :** 12003744 **total,**  4699288 **free,**  2674084 **used,**  4630372 **buff/cache
KiB Swap:**  7014580 **total,**  7014580 **free,**        0 **used.**  8421340 **avail Mem

  PID USER      PR  NI    VIRT    RES    SHR S  %CPU  %MEM     TIME+ COMMAND
 5030 cristia+  20   0 5056076 353308 145744 S 45,51 2,943  17:35.89 plasmashell
** 1325 root      20   0  507432 136664 106256 R 28,57 1,139  10:32.12 X**
 4056 cristia+  20   0 3257900 111024  70296 S 12,62 0,925   5:18.60 kwin_x11
 5508 cristia+  20   0 1149320 321156 207376 S 3,322 2,675   3:28.21 vivaldi-bin
 5350 cristia+  20   0 1413688 223952 124292 S 2,658 1,866   1:29.47 vivaldi-bin
 4104 cristia+  20   0  670948  67708  55960 S 2,326 0,564   0:06.51 yakuake

Cris

Cris70 · June 20, 2017, 9:55am

Solved the problem by changing the desktop background to a static image, after reading this thread.

Hope this helps…
Cris

tannington · June 20, 2017, 1:26pm

It seems there are quite a few reports now of higher CPU utilisation following the Qt 5.7 -> 5.9 update. Seemingly not just the slideshow wallpaper being the cause.

https://bugs.kde.org/show_bug.cgi?id=381280 (and it’s associated duplicate reports)

Even with all animations disabled, no desktop effects, and a static image wallpaper I’m seeing average CPU utilisation of around 8-10% at idle, compared to <1% on an old 13.2/kde4 system.

knurpht · June 20, 2017, 2:09pm

Don’t see it here. TW up to date. Plasmashell uses .6 to 2 % CPU.

phil524 · June 20, 2017, 3:50pm

Thanks,

but I have no slideshow but static image as background.

On more thing I have two display both at 19201080 with a desktop extended using the two display as a 38401080 display.

Regards
Philippe

phil524 · June 20, 2017, 4:35pm

Thanks,

what I find strange is that even if I close my browser (Seamonkey) the CPU usage remains high; just as if plasmashell start a process for each program and these remain running

top - 15:51:04 up 18:08,  3 users,  load average: 1.79, 1.78, 1.75
Tasks: 288 total,   2 running, 286 sleeping,   0 stopped,   0 zombie
%Cpu(s):  5.1 us,  9.1 sy,  0.0 ni, 85.2 id,  0.0 wa,  0.0 hi,  0.0 si,  0.7 st
KiB Mem : 15965580 total, 12538892 free,   865612 used,  2561076 buff/cache
KiB Swap: 12585980 total, 12585980 free,        0 used. 14910976 avail Mem 

  PID USER      PR  NI    VIRT    RES    SHR S   %CPU  %MEM     TIME+ COMMAND                                                                                                               
 1172 philippe  20   0 4865572 245228 113832 R 148.11 1.536 699:50.37 plasmashell                
  968 root      20   0  423948  91512  36344 S 67.396 0.573 321:09.50 Xorg  
  509 root      20   0   12056   4600   1476 S  0.994 0.029  14:36.28 haveged  
 1787 philippe  20   0  810928  87396  74076 S  0.596 0.547   2:41.98 konsole 
 1858 root      20   0   43132   4304   3440 R  0.596 0.027   2:08.20 top        
 1566 mysql     20   0  784388 107740  19432 S  0.398 0.675   0:42.75 mysqld 
    8 root      20   0       0      0      0 S  0.199 0.000   1:29.03 rcu_preempt           
 1165 philippe  20   0 3028316  66444  54084 S  0.199 0.416   0:29.53 kwin_x11 
 1312 philippe  20   0    9968   2044   1816 S  0.199 0.013   0:30.73 ksysguardd 
    1 root      20   0   71048   8188   6112 S  0.000 0.051   0:06.19 systemd

My video card is a Nvidia with two displays 1920*1080 set as an extended display (3840 *1080).
As not everybody seems to have this problem it is maybe the driver nouveau which is the culprit. I have still older kernels and I’ll do a test with it

Regards
Philippe

tannington · June 20, 2017, 4:48pm

I’m also using the nouveau driver, but in this instance I don’t believe that is of relevance as in the bug report I linked to, ( https://bugs.kde.org/show_bug.cgi?id=381280 ) user “Lukas” states he is using Intel graphics.

phil524 · June 20, 2017, 6:52pm

Hello,

with kernel 4.11.4-1 the usage is back to normal as far as I can see


top - 18:19:10 up 3 min,  2 users,  load average: 0,52, 0,61, 0,27
Tasks: 278 total,   2 running, 276 sleeping,   0 stopped,   0 zombie
%Cpu(s):  2,2 us,  1,9 sy,  0,0 ni, 95,8 id,  0,0 wa,  0,0 hi,  0,0 si,  0,0 st
KiB Mem : 16384068 total, 14056512 free,  1258028 used,  1069528 buff/cache
KiB Swap: 12585980 total, 12585980 free,        0 used. 14811576 avail Mem 

  PID USER      PR  NI    VIRT    RES    SHR S   %CPU  %MEM     TIME+ COMMAND             
 2392 philippe  20   0 3929160 176140 107088 S 30,279 1,075   0:43.17 plasmashell    
 2163 root      20   0  427112  91024  55216 S 13,944 0,556   0:20.78 Xorg                
 2587 philippe  20   0 1587460 419780 106676 S  3,586 2,562   0:35.64 seamonkey         
 2764 root      20   0       0      0      0 S  2,191 0,000   0:01.78 kworker/0:4                              
 2565 philippe  20   0  810712  86092  72712 S  1,793 0,525   0:02.63 konsole                  
   18 root      20   0       0      0      0 S  1,394 0,000   0:02.08 kworker/1:0                          
  104 root      20   0       0      0      0 S  1,394 0,000   0:01.28 kworker/8:1                              
    8 root      20   0       0      0      0 S  0,996 0,000   0:01.61 rcu_preempt               
  103 root      20   0       0      0      0 S  0,996 0,000   0:01.36 kworker/5:1             
 2366 philippe  20   0 2953524  68712  53236 S  0,996 0,419   0:01.98 kwin_x11 
  248 root      20   0       0      0      0 S  0,797 0,000   0:01.59 kworker/2:2

So I think that it can be related to the new kernel 4.11.5-1 and the nouveau driver.
I’l open a bug therefor

Regards
Philippe

tannington · June 20, 2017, 7:36pm

plasmashell has dropped considerably from your earlier utilisation.

But, at around 30% is still IMHO too high, does it drop after a few minutes or remain at that level.

As “Knurpht” wrote earlier in post #5 he’s seeing plasmashell using only .6 to 2 % CPU

phil524 · June 20, 2017, 9:11pm

No the CPU usage doesn’t drop significantly after some minutes without activity .
Each time that I load another program it goes higher up to 150% with kernel 4.11.5-1 and 110% with kernel 4.11.4-1

Regards
Philippe

phil524 · June 21, 2017, 4:33am

Problem solved by installing last snapshot 20170619
Now the plasmashell use between 0,3% and 6% and fall back to 0,3% when no actvity

Regards
Philippe

Cris70 · June 21, 2017, 8:54am

Not exactly related to this thread, but how do you do this (see above)?
I have Intel graphics and I have two separate desktops; I don’t see anywhere a setting to extend the desktop.

TIA
Cris

tannington · June 21, 2017, 1:09pm

I’ve just updated to 0619 and also now see plasmashell utilisation at <1% when idle.

kwin_X11 is consuming 13-22% though… :\

tannington · June 21, 2017, 1:26pm

By chance I’ve just discovered that if I disable “Show Seconds” in the digital clock, then kwin_X11’s utilisation drops to around 8%

phil524 · June 21, 2017, 9:45pm

Hello,

I changed 3 files in /etc/X11/xorg.conf.d
File /etc/X11/xorg.conf.d/50-device.conf


# Having multiple "Device" sections is known to be problematic. Make
# sure you don't have in use another one laying around e.g. in another
# xorg.conf.d file or even a generic xorg.conf file. More details can
# be found in https://bugs.freedesktop.org/show_bug.cgi?id=32430.
#
Section "Device"
  Identifier "Quadro 4000"
    Option  "Monitor-DVI" "DVI-I-1"
    Option  "Monitor-DP1" "DP-1"
    Driver  "nouveau"
#
EndSection

file /etc/X11/xorg.conf.d/50-monitor.conf

# Having multiple "Monitor" sections is known to be problematic. Make
# sure you don't have in use another one laying around e.g. in another
# xorg.conf.d file or even a generic xorg.conf file. More details can
# be found in https://bugs.freedesktop.org/show_bug.cgi?id=32430.
#
Section "Monitor"
  Identifier "DVI-I-1"
  Option "Preferred Mode" "1920x1080"
#
#  ## If your monitor doesn't support DDC you may override the
#  ## defaults here
#  #HorizSync 28-85
#  #VertRefresh 50-100
#
#  ## Add your mode lines here, use e.g the cvt tool
#
    Modeline "1600x1200"  160.96  1600 1704 1880 2160  1200 1201 1204 1242  -HSync +Vsync
    Modeline "1600x900"  118.25  1600 1696 1856 2112  900 903 908 934 -hsync +vsync
    Modeline "1920x1080"  173.00  1920 2048 2248 2576  1080 1083 1088 1120 -hsync +vsync

EndSection
Section "Monitor"
  Identifier   "DP-1"
  Option "Preferred Mode" "1920x1080"
  Option  "RightOf" "DVI-I-1"
  Modeline "1920x1080"  173.00  1920 2048 2248 2576  1080 1083 1088 1120 -hsync +vsync
EndSection

Here the most important is the option “RightOf” to define the relative position

file /etc/X11/xorg.conf.d/50-screen.conf where I define a virtual screen with size = sum the two monitors

# Having multiple "Screen" sections is known to be problematic. Make
# sure you don't have in use another one laying around e.g. in another
# xorg.conf.d file or even a generic xorg.conf file. More details can
# be found in https://bugs.freedesktop.org/show_bug.cgi?id=32430.
#
Section "Screen"
  Identifier "Default Screen"
    SubSection "Display"
        Virtual   3840 1080
    EndSubSection
  Device "Quadro 4000"
  Monitor "DVI-I-1"
  Monitor "DP-1"
#
#  ## Doesn't help for radeon/radeonhd drivers; use magic in
#  ## 50-device.conf instead
#  Monitor "Default Monitor"
#
EndSection

the virtual screen use the two monitors. I can even set a different background for each monitor

Regards
Philippe

cnzhx · June 26, 2017, 11:06am

I saw this problem this morning, too.

After plugging in the external monitor (1920x1080) via HDMI-to-VGA cable, plasmashell takes ~7% CPU. It can boost to ~10-15% CPU if any visual activity happens on display.

However, after plugging out then in the external monitor, plamsashell takes almost 0% CPU (fluctuating to ~2% sometimes).

So it’s just a glitch to me.

phil524 · June 26, 2017, 9:36pm

hello,

seems that the last snapshot has again this problem: plasmashell use again up to >150% cpu (I suppose that it is above 100% because I have a six core processor and something confuse top). After some time all actions in the session are very slow and I need to logoff/login.

Need to retest but seems dependant of the session: sometime plasmashell is very rapidly at a high percentage sometime not.

Regards
Philippe

Cris70 · June 27, 2017, 8:27am

Hi Phil, top counts up to 100% for each core, so if you have a six-core CPU you could theoretically have a process use up to 600% when it has all six cores running at full steam.

Cris

tannington · June 27, 2017, 1:18pm

Which snapshot? 0622 or 0625 - I’m still on 0620, yet to update.

Multiple reports, multiple suspects…

https://bugs.kde.org/show_bug.cgi?id=381592
https://bugs.kde.org/show_bug.cgi?id=381608
https://bugs.kde.org/show_bug.cgi?id=380800
https://bugs.kde.org/show_bug.cgi?id=381471
https://bugs.kde.org/show_bug.cgi?id=378010
( https://bugs.kde.org/show_bug.cgi?id=381000 )

… and probably more that a quick search didn’t find.