[Bug 1880723] Re: gnome-shell high CPU usage on Ubuntu 20.04
Moved to Private so only the original reporter (JPM) can reply. ** Information type changed from Private to Public -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1880723 Title: gnome-shell high CPU usage on Ubuntu 20.04 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1880723/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1880723] Re: gnome-shell high CPU usage on Ubuntu 20.04
Dan, Please report your own bug. This one was due to expire in 10 days. ** Information type changed from Public to Private -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1880723 Title: gnome-shell high CPU usage on Ubuntu 20.04 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1880723/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1880723] Re: gnome-shell high CPU usage on Ubuntu 20.04
dantheperson, the problem you describe is bug 1880405. ** Information type changed from Public to Private -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1880723 Title: gnome-shell high CPU usage on Ubuntu 20.04 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1880723/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1880723] Re: gnome-shell high CPU usage on Ubuntu 20.04
lspci ** Attachment added: "lspcik.txt" https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1880723/+attachment/5393305/+files/lspcik.txt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1880723 Title: gnome-shell high CPU usage on Ubuntu 20.04 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1880723/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1880723] Re: gnome-shell high CPU usage on Ubuntu 20.04
I'm seeing something very similar. Did a fresh install of 20.04 a week ago. After being logged in half a day things really start slowing down. Alt+Tab takes a few seconds to pop up, then you tab through to e.g. an open Calculator instance and that takes 8 seconds to come to the foreground. gnone-shell using 50% of one CPU. Have tried your suggestions to no avail. attaching the logs requested. journalctl shows a tone of javascript errors e.g. JS ERROR: TypeError: null has no properties _onFocusChanged@resource:///org/gnome/shell/ui/closeDialog.js:135:9 $ sudo strace -c -p 7087 strace: Process 7087 attached ^Cstrace: Process 7087 detached % time seconds usecs/call callserrors syscall -- --- --- - - 34.730.215539 2 98592 sendmsg 23.990.148891 2 70929 36904 recvmsg 22.680.140739 2 68317 poll 16.420.101903 2 34030 writev 1.210.007527 4 1716 ioctl 0.460.002841 3 932 138 futex 0.250.001521 5 300 260 stat 0.100.000590 0 656 mprotect 0.060.000362 0 1165 write 0.040.000278 554 munmap 0.030.000205 0 305 getpid 0.010.89 0 383 read 0.000.22 113 timerfd_create 0.000.17 113 close 0.000.17 110 mmap 0.000.17 113 timerfd_settime 0.000.02 2 1 restart_syscall 0.000.00 0 2 getrusage -- --- --- - - 100.000.620560277431 37302 total Your journalctl command produced a 1.5Gb file. I have attached the last 100K lines. Let me know if you need more. ** Attachment added: "journal-tail.txt" https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1880723/+attachment/5393304/+files/journal-tail.txt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1880723 Title: gnome-shell high CPU usage on Ubuntu 20.04 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1880723/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1880723] Re: gnome-shell high CPU usage on Ubuntu 20.04
** Attachment added: "Screenshot from 2020-07-17 15-33-50.png" https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1880723/+attachment/5393306/+files/Screenshot%20from%202020-07-17%2015-33-50.png -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1880723 Title: gnome-shell high CPU usage on Ubuntu 20.04 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1880723/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1880723] Re: gnome-shell high CPU usage on Ubuntu 20.04
> Looking at htop I can see gnome-shell takes anywhere between 5% and 50% of CPU, normally between 10% and 20%. This is a little too vague for us to be able to action right now, but I can suggest checking a few things that commonly cause high CPU for other people: 1. Uninstall all non-Ubuntu gnome-shell extensions. 2. Uninstall 'indicator-multiload' if you have it (bug 784055). 3. Try disabling 'Ubuntu AppIndicators' in gnome-shell-extension-prefs. 4. Make sure the clock in your Gnome panel at the top of the screen is NOT set to show seconds. If the problem is still not solved then please run these commands: lspci -k > lspcik.txt journalctl -b0 > journal.txt and attach the resulting text files. And if you are willing then please attach a screenshot of your desktop so we can see if it entails anything unusual I haven't yet thought of. ** Changed in: gnome-shell (Ubuntu) Status: New => Incomplete ** Tags added: performance -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1880723 Title: gnome-shell high CPU usage on Ubuntu 20.04 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1880723/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1880723] Re: gnome-shell high CPU usage on Ubuntu 20.04
After an update and restart, switching desktops feels snappy again. Looking at htop the cpu usage is still higher than expected. And strace still shows many errors: jpmeijers@jpmeijers-XPS13-9333:~$ sudo strace -c -p 2217 [sudo] password for jpmeijers: strace: Process 2217 attached ^Cstrace: Process 2217 detached % time seconds usecs/call callserrors syscall -- --- --- - - 29.470.004451 4 1008 882 recvmsg 24.060.003634 9 379 poll 11.860.001792 8 222 mprotect 7.120.001076 2 515 ioctl 7.020.001060 6 156 write 5.560.000840 5 161 writev 3.250.000491 2 206 getpid 2.530.000382 1133 timerfd_create 2.040.000308 933 timerfd_settime 2.000.000302 462 read 1.870.000283 833 close 1.830.000277 832 2 futex 0.930.000141 35 4 mmap 0.440.66 33 2 getrusage 0.010.01 1 1 restart_syscall -- --- --- - - 100.000.015104 2847 884 total ** Tags added: apport-collected focal ** Description changed: After having a couple of terminals and and Chrome windows open for most of the day, everything becomes sluggish. Switching desktops is clearly very slow and Chrome's windows don't react to all mouse actions. Looking at htop I can see gnome-shell takes anywhere between 5% and 50% of CPU, normally between 10% and 20%. With Chrome and terminal windows open, an strace on the PID of gnome- shell shows the following: jpmeijers@jpmeijers-XPS13-9333:~$ sudo strace -c -p 3491 [sudo] password for jpmeijers: strace: Process 3491 attached ^Cstrace: Process 3491 detached % time seconds usecs/call callserrors syscall -- --- --- - - 36.370.108651 3 30932 16434 recvmsg 34.990.104531 3 29278 poll 26.200.078272 5 14601 writev 1.060.003158 2 1181 ioctl 0.350.001041 2 430 write 0.270.000812 1 602 getpid 0.260.000773 4 158 read 0.110.000316 396 timerfd_create 0.100.000313 396 close 0.100.000300 473 4 futex 0.080.000241 296 timerfd_settime 0.070.000201 0 228 mprotect 0.040.000111 27 4 getrusage 0.010.38 12 3 sendmsg 0.000.08 011 munmap 0.000.05 0 6 mmap 0.000.02 1 2 1 recvfrom -- --- --- - - 100.000.298773 77797 16439 total After closing Chrome windows: jpmeijers@jpmeijers-XPS13-9333:~$ sudo strace -c -p 3491 strace: Process 3491 attached ^Cstrace: Process 3491 detached % time seconds usecs/call callserrors syscall -- --- --- - - 36.240.099458 3 30319 15900 recvmsg 35.150.096450 3 29053 poll 26.860.073711 5 14500 writev 0.680.001858 1 930 ioctl 0.400.001092 3 318 write 0.140.000386 664 close 0.130.000344 0 469 getpid 0.110.000295 464 timerfd_create 0.110.000292 1 222 mprotect 0.060.000177 264 timerfd_settime 0.060.000153 625 munmap 0.040.000121 1 121 read 0.010.38 049 4 futex 0.010.18 6 3 sendmsg 0.000.13 13 1 restart_syscall 0.000.00 0 7 mmap 0.000.00 0 2 getrusage -- --- --- - - 100.000.274406 76211 15904 total After closing the terminal windows too, therefore only the terminal running strace is open:
[Bug 1880723] Re: gnome-shell high CPU usage on Ubuntu 20.04
After logging out and back in the CPU usage seems lower, but without anything but a terminal open gnome-shell is still the biggest user of the CPU at around 1-2% continuously. After gnome-shell the second highest user is: Xorg vt2 -displayfd 3 I see there is an update for gnome-shell, so I will try an update now. jpmeijers@jpmeijers-XPS13-9333:~$ apt policy gnome-shell gnome-shell: Installed: 3.36.1-5ubuntu2 Candidate: 3.36.2-1ubuntu1~20.04.1 Version table: 3.36.2-1ubuntu1~20.04.1 500 500 http://uk-mirrors.evowise.com/ubuntu focal-updates/main amd64 Packages *** 3.36.1-5ubuntu2 100 100 /var/lib/dpkg/status 3.36.1-5ubuntu1 500 500 http://uk-mirrors.evowise.com/ubuntu focal/main amd64 Packages -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1880723 Title: gnome-shell high CPU usage on Ubuntu 20.04 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1880723/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
