Ubuntu
gnome-shell package

High CPU from gnome-shell with high errors for recvmsg

Bug #1924550 reported by Kareem on 2021-04-15

This bug report is a duplicate of: Bug #1880405: Unresponsive GUI and journal flooded with: JS ERROR: TypeError: null has no properties _onFocusChanged@resource:///org/gnome/shell/ui/closeDialog.js:135:9. Edit Remove

This bug affects 1 person

Affects		Status	Importance	Assigned to	Milestone
	gnome-shell (Ubuntu)	New	Undecided	Unassigned

Bug Description

I am getting high CPU from gnome-shell and I can't track down whats causing the issue.

$ strace: Process 2793 detached
% time seconds usecs/call calls errors syscall
------ ----------- ----------- --------- --------- ----------------
38.27 0.047677 1 26640 13464 recvmsg
35.76 0.044550 1 26406 poll
25.77 0.032103 2 13191 writev
  0.08 0.000100 2 37 write
  0.05 0.000068 0 144 mprotect
  0.04 0.000044 0 60 52 stat
  0.01 0.000018 0 22 3 futex
  0.01 0.000013 0 72 getpid
  0.00 0.000006 0 23 read
  0.00 0.000003 3 1 sendmsg
  0.00 0.000000 0 3 mmap
  0.00 0.000000 0 2 munmap
  0.00 0.000000 0 86 ioctl
------ ----------- ----------- --------- --------- ----------------
100.00 0.124582 66687 13519 total

$ sudo strace -p 2793 -e trace=recvmsg
recvmsg(19, {msg_namelen=0}, 0) = -1 EAGAIN (Resource temporarily unavailable)
recvmsg(19, {msg_name=NULL, msg_namelen=0, msg_iov=[{iov_base="\34\0J\356\7\0`\0\301\1\0\0\32\344HM\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", iov_len=4096}], msg_iovlen=1, msg_controllen=0, msg_flags=0}, 0) = 32
recvmsg(19, {msg_namelen=0}, 0) = -1 EAGAIN (Resource temporarily unavailable)
recvmsg(19, {msg_name=NULL, msg_namelen=0, msg_iov=[{iov_base="\34\0K\356\7\0`\0\301\1\0\0\32\344HM\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", iov_len=4096}], msg_iovlen=1, msg_controllen=0, msg_flags=0}, 0) = 32
recvmsg(19, {msg_namelen=0}, 0) = -1 EAGAIN (Resource temporarily unavailable)
recvmsg(19, {msg_name=NULL, msg_namelen=0, msg_iov=[{iov_base="\34\0L\356\7\0`\0\301\1\0\0\33\344HM\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", iov_len=4096}], msg_iovlen=1, msg_controllen=0, msg_flags=0}, 0) = 32

$ ls -al /proc/2793/fd/19
lrwx------ 1 <removed> <removed> 64 Apr 15 09:07 /proc/2793/fd/19 -> 'socket:[59892]'

lsof |grep 59892
lsof: WARNING:     lsof: WARNING:     lsof: WARNING:     gnome-she 2793 gnome-she gnome-she gnome-she gnome-she gnome-she gnome-she gnome-she gnome-she gnome-she gnome-she gnome-she gnome-she gnome-she gnome-she gnome-she gnome-she can't stat() nsfs file system /run/docker/netns/11c4a1f5359b
;   Output information may be incomplete.
can't stat() nsfs file system /run/docker/netns/d603ef1fe841
;   Output information may be incomplete.
can't stat() nsfs file system /run/docker/netns/a9c329decb40
;   Output information may be incomplete.
<removed> 19u unix 0x0000000000000000 0t0 59892 type=STREAM
2793 2802 gmain <removed> 19u unix 0x0000000000000000 0t0 59892 type=STREAM
2793 2805 gdbus <removed> 19u unix 0x0000000000000000 0t0 59892 type=STREAM
2793 2806 dconf\x20 <removed> 19u unix 0x0000000000000000 0t0 59892 type=STREAM
2793 2808 gnome-s:d <removed> 19u unix 0x0000000000000000 0t0 59892 type=STREAM
2793 2809 gnome-s:d <removed> 19u unix 0x0000000000000000 0t0 59892 type=STREAM
2793 2810 gnome-s:d <removed> 19u unix 0x0000000000000000 0t0 59892 type=STREAM
2793 2811 gnome-s:d <removed> 19u unix 0x0000000000000000 0t0 59892 type=STREAM
2793 2813 JS\x20Hel <removed> 19u unix 0x0000000000000000 0t0 59892 type=STREAM
2793 2814 JS\x20Hel <removed> 19u unix 0x0000000000000000 0t0 59892 type=STREAM
2793 2815 JS\x20Hel <removed> 19u unix 0x0000000000000000 0t0 59892 type=STREAM
2793 2816 JS\x20Hel <removed> 19u unix 0x0000000000000000 0t0 59892 type=STREAM
2793 2817 JS\x20Hel <removed> 19u unix 0x0000000000000000 0t0 59892 type=STREAM
2793 2818 JS\x20Hel <removed> 19u unix 0x0000000000000000 0t0 59892 type=STREAM
2793 2819 JS\x20Hel <removed> 19u unix 0x0000000000000000 0t0 59892 type=STREAM
2793 2820 JS\x20Hel <removed> 19u unix 0x0000000000000000 0t0 59892 type=STREAM
2793 5764 threaded- <removed> 19u unix 0x0000000000000000 0t0 59892 type=STREAM

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: gnome-shell 3.36.7-0ubuntu0.20.04.1
ProcVersionSignature: Ubuntu 5.8.0-48.54~20.04.1-generic 5.8.18
Uname: Linux 5.8.0-48-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.16
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
Date: Thu Apr 15 08:53:43 2021
DisplayManager: gdm3
InstallationDate: Installed on 2021-02-05 (68 days ago)
InstallationMedia: Ubuntu 20.04.2 LTS "Focal Fossa" - Release amd64 (20210204)
ProcEnviron:
TERM=xterm-256color
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=en_US.UTF-8
SHELL=/bin/bash
RelatedPackageVersions: mutter-common 3.36.7+git20201123-0.20.04.1
SourcePackage: gnome-shell
UpgradeStatus: No upgrade log present (probably fresh install)

Tags:

Revision history for this message

Kareem (kareem-f) wrote on 2021-04-15:

Dependencies.txt Edit (22.4 KiB, text/plain; charset="utf-8")
GsettingsChanges.txt Edit (1.5 KiB, text/plain; charset="utf-8")
ProcCpuinfoMinimal.txt Edit (1.5 KiB, text/plain; charset="utf-8")
ShellJournal.txt Edit (615.3 KiB, text/plain; charset="utf-8")
monitors.xml.txt Edit (7.2 KiB, text/plain; charset="utf-8")

Revision history for this message

Daniel van Vugt (vanvugt) wrote on 2021-04-16:

Thank you for taking the time to report this bug and helping to make Ubuntu better. This particular bug has already been reported and is a duplicate of bug 1880405, so it is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report. Feel free to continue to report any other bugs you may find.