10 seconds of strace on core i5 strace -c -p 17477 strace: Process 17477 attached ^Cstrace: Process 17477 detached % time seconds usecs/call calls errors syscall ------ ----------- ----------- --------- --------- ---------------- 64.24 0.445795 2 258405 clock_gettime 16.78 0.116422 4158 28 3 clone 4.95 0.034359 32 1060 ioctl 4.00 0.027777 3 9464 8685 recvmsg 2.93 0.020340 6 3293 poll 1.62 0.011226 2 5567 getpid 1.49 0.010356 2 5605 sched_yield 1.35 0.009360 5 1755 43 futex 0.84 0.005839 4 1333 writev 0.71 0.004905 2 2817 mprotect 0.41 0.002868 3 999 write 0.38 0.002657 3 982 read 0.08 0.000527 9 62 4 openat 0.06 0.000408 4 92 nanosleep 0.05 0.000335 3 110 close 0.03 0.000237 2 112 fstat 0.03 0.000198 3 61 mmap 0.02 0.000112 2 54 fcntl 0.01 0.000083 83 1 restart_syscall 0.01 0.000059 2 28 pipe2 0.01 0.000050 2 22 getrusage 0.00 0.000017 3 6 wait4 0.00 0.000016 1 12 12 lseek 0.00 0.000006 2 4 rt_sigreturn 0.00 0.000003 1 4 statfs ------ ----------- ----------- --------- --------- ---------------- 100.00 0.693955 291876 8747 total
-- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gnome-shell in Ubuntu. https://bugs.launchpad.net/bugs/1773959 Title: High CPU usage by gnome-shell when only running gnome-terminal Status in gnome-shell package in Ubuntu: Confirmed Bug description: Even when doing nothing but displaying a terminal screen with top running gnome-shell uses 10% of a CPU. That seems excessive. I disabled all extensions to try and make the test fair. Enabling the system monitor extension increases the load to 13-14%. It seems that the gnome-shell screen painting is highly CPU consuming even if screen updates are infrequent (1 a second for all these cases). ProblemType: Bug DistroRelease: Ubuntu 18.04 Package: gnome-shell 3.28.1-0ubuntu2 ProcVersionSignature: Ubuntu 4.15.0-20.21-generic 4.15.17 Uname: Linux 4.15.0-20-generic x86_64 ApportVersion: 2.20.9-0ubuntu7 Architecture: amd64 CurrentDesktop: ubuntu:GNOME Date: Tue May 29 11:38:05 2018 DisplayManager: gdm3 InstallationDate: Installed on 2016-10-27 (578 days ago) InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719) SourcePackage: gnome-shell UpgradeStatus: Upgraded to bionic on 2018-05-19 (9 days ago) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1773959/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
