[Bug 1230031] Re: dbus-daemon consumes 100% cpu without reason
Parag Warudkar
1230031 at bugs.launchpad.net
Tue Feb 11 23:05:58 UTC 2014
Here is some hopefully useful info - Perf Report data and gdb stack
trace - lightdm user, 100% CPU for dbus-daemon.
Loaded symbols for /lib/x86_64-linux-gnu/libnss_files.so.2
__errno_location () at ../csu/errno-loc.c:26
26 ../csu/errno-loc.c: No such file or directory.
(gdb) bt
#0 __errno_location () at ../csu/errno-loc.c:26
#1 0x000000000043ae88 in _dbus_babysitter_unref (sitter=0x181e640) at ../../dbus/dbus-spawn.c:317
#2 0x00000000004058ab in bus_pending_activation_unref (pending_activation=0x1815700)
at ../../bus/activation.c:194
#3 0x000000000042d9ee in free_entry_data (table=0x180aec0, table=0x180aec0, entry=0x1815e80,
entry=0x1815e80) at ../../dbus/dbus-hash.c:445
#4 _dbus_hash_table_unref (table=0x180aec0) at ../../dbus/dbus-hash.c:395
#5 0x0000000000405b8d in bus_activation_unref (activation=0x180c880)
at ../../bus/activation.c:969
#6 0x00000000004088af in bus_context_unref (context=0x1809160) at ../../bus/bus.c:1086
#7 0x0000000000404503 in main (argc=<optimized out>, argv=<optimized out>)
at ../../bus/main.c:650
------------------------------------------------------------------------------------------------------------------------------
perf report
---------------
Samples: 67K of event 'cycles', Event count (approx.): 37182799970
55.43% dbus-daemon dbus-daemon [.] _dbus_babysitter_unref â
33.54% dbus-daemon libpthread-2.17.so [.] __errno_location â
10.88% dbus-daemon dbus-daemon [.] __errno_location at plt â
Annotation
-' â", â+" jns 36fca
-' â", â+' callq __errno_location at plt
20.05 â", mov (%rax),%edi
39.55 â", mov %rax,%r12
â", cmp $0x4,%edi
-' â", â+" jne 37000
20.20 â", test %ebp,%ebp
â", â+" je 36fa0
-' â", test %ebp,%ebp
20.20 â", â+" js 36fb3
â", movl $0xffffffff,0x18(%rbx)
--
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https://bugs.launchpad.net/bugs/1230031
Title:
dbus-daemon consumes 100% cpu without reason
Status in “dbus” package in Ubuntu:
Confirmed
Bug description:
Just login in to session, and dbus-daemon consumes 100% of cpu.
Before, I did a login and logout. This problem appears randomly, not
all the time.
9107 sergio 20 0 30376 1660 1356 R 100,1 0,0 11:35.08 dbus-daemon
11692 root 20 0 433m 54m 37m S 1,0 1,4 0:05.46 Xorg
12279 sergio 20 0 1506m 78m 30m S 0,7 2,1 0:05.40 compiz
12417 sergio 20 0 553m 20m 11m S 0,7 0,6 0:00.93 gnome-terminal
13757 sergio 20 0 853m 160m 40m S 0,7 4,2 0:06.83 firefox
See sensors, dbus-daemon is heating up my laptop:
Adapter: Virtual device
temp1: +68.0°C (crit = +98.0°C)
coretemp-isa-0000
Adapter: ISA adapter
Physical id 0: +69.0°C (high = +84.0°C, crit = +100.0°C)
Core 0: +49.0°C (high = +84.0°C, crit = +100.0°C)
Core 1: +51.0°C (high = +84.0°C, crit = +100.0°C)
Core 2: +69.0°C (high = +84.0°C, crit = +100.0°C)
Core 3: +55.0°C (high = +84.0°C, crit = +100.0°C)
asus-isa-0000
Adapter: ISA adapter
temp1: +6280.0°C
pkg-temp-0-virtual-0
Adapter: Virtual device
temp1: +68.0°C
---
Description: Ubuntu Saucy Salamander (development branch)
Release: 13.10
Linux sergio-X751JB 3.11.0-8-generic #15-Ubuntu SMP Fri Sep 20 04:11:26 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux
dbus:
Installed: 1.6.12-0ubuntu5
Candidate: 1.6.12-0ubuntu5
Version table:
*** 1.6.12-0ubuntu5 0
500 http://archive.ubuntu.com/ubuntu/ saucy/main amd64 Packages
100 /var/lib/dpkg/status
ProblemType: Bug
DistroRelease: Ubuntu 13.10
Package: dbus 1.6.12-0ubuntu5
ProcVersionSignature: Ubuntu 3.11.0-8.15-generic 3.11.1
Uname: Linux 3.11.0-8-generic x86_64
ApportVersion: 2.12.4-0ubuntu1
Architecture: amd64
Date: Wed Sep 25 04:31:14 2013
InstallationDate: Installed on 2013-09-20 (4 days ago)
InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Alpha amd64 (20130920)
MarkForUpload: True
SourcePackage: dbus
UpgradeStatus: No upgrade log present (probably fresh install)
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