Public bug reported:
Top is showing that 2 CPUs are being consumed at nearly 100% each:
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
3916 king 20 0 1160372 264036 50188 S 198.7 4.5 36:54.78 firefox
Seems like it is spinning in pthread_cond_wait()
(gdb) where
#0 pthread_cond_wait@@GLIBC_2.3.2 () at
../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1 0x00007fefa1de3f28 in PR_WaitCondVar () from /usr/lib/firefox/libnspr4.so
#2 0x00007fefa1de4218 in PR_Wait () from /usr/lib/firefox/libnspr4.so
#3 0x00007fef9dfdd172 in ?? () from /usr/lib/firefox/libxul.so
#4 0x00007fef9dfde17d in ?? () from /usr/lib/firefox/libxul.so
#5 0x00007fef9e99e0ae in ?? () from /usr/lib/firefox/libxul.so
#6 0x00007fef9e99e0cd in ?? () from /usr/lib/firefox/libxul.so
#7 0x00007fef9dfa421b in ?? () from /usr/lib/firefox/libxul.so
#8 0x00007fef9e99e387 in ?? () from /usr/lib/firefox/libxul.so
#9 0x00007fef9e99e3c3 in ?? () from /usr/lib/firefox/libxul.so
#10 0x00007fef9dfbf2b6 in ?? () from /usr/lib/firefox/libxul.so
#11 0x00007fef9dfbf88a in ?? () from /usr/lib/firefox/libxul.so
#12 0x00007fef9dfa70a0 in ?? () from /usr/lib/firefox/libxul.so
#13 0x00007fef9eeba08f in ?? () from /usr/lib/firefox/libxul.so
#14 0x00007fef9eebe940 in ?? () from /usr/lib/firefox/libxul.so
#15 0x00007fef9eebeb5a in XRE_main () from /usr/lib/firefox/libxul.so
#16 0x00007fefa33503c1 in _start ()
(gdb) quit
..and looks like it's possibly spinning on a futex
System calls traced:
PID Process Syscall Count Rate/Sec Total
μSecs % Call Time
3916 firefox futex 1 0.0167
0 0.0000
ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: firefox 28.0+build1-0ubuntu1
ProcVersionSignature: Ubuntu 3.13.0-16.36-lowlatency 3.13.5
Uname: Linux 3.13.0-16-lowlatency x86_64
AddonCompatCheckDisabled: False
ApportVersion: 2.13.3-0ubuntu1
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: king 3531 F.... pulseaudio
BrokenPermissions:
sessionstore.bak (0o600, wrong owner)
sessionstore.js (0o600, wrong owner)
BuildID: 20140313141126
Channel: Unavailable
CurrentDesktop: Unity
Date: Sat Mar 15 16:32:27 2014
EcryptfsInUse: Yes
ForcedLayersAccel: False
IfupdownConfig:
# interfaces(5) file used by ifup(8) and ifdown(8)
auto lo
iface lo inet loopback
IncompatibleExtensions:
English (GB) Language Pack - langpack-en...@firefox.mozilla.org
English (South Africa) Language Pack - langpack-en...@firefox.mozilla.org
Default - {972ce4c6-7e08-4474-a285-3208198ce6fd}
InstallationDate: Installed on 2013-12-09 (95 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Alpha amd64 (20131209)
IpRoute:
default via 192.168.0.1 dev eth0 proto static
192.168.0.0/24 dev eth0 proto kernel scope link src 192.168.0.14 metric 1
192.168.0.0/24 dev wlan0 proto kernel scope link src 192.168.0.20 metric 9
192.168.122.0/24 dev virbr0 proto kernel scope link src 192.168.122.1
MostRecentCrashID: bp-77eb6b98-c032-4092-a561-b70f22130104
PrefSources: prefs.js
Profiles: Profile0 (Default) - LastVersion=28.0/20140313141126
RelatedPackageVersions:
rhythmbox-mozilla 3.0.1-1ubuntu15
google-talkplugin 5.1.5.0-1
totem-mozilla 3.10.1-1ubuntu3
RfKill:
0: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no
RunningIncompatibleAddons: True
SourcePackage: firefox
UpgradeStatus: No upgrade log present (probably fresh install)
WifiSyslog: Mar 15 16:30:27 lenovo kernel: [ 1278.310072] ptrace of pid 3916
was attempted by: gdb (pid 5412)
dmi.bios.date: 05/24/2012
dmi.bios.vendor: LENOVO
dmi.bios.version: G2ET31WW (1.11 )
dmi.board.asset.tag: Not Available
dmi.board.name: 2320CTO
dmi.board.vendor: LENOVO
dmi.board.version: Not Available
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias:
dmi:bvnLENOVO:bvrG2ET31WW(1.11):bd05/24/2012:svnLENOVO:pn2320CTO:pvrThinkPadX230:rvnLENOVO:rn2320CTO:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 2320CTO
dmi.product.version: ThinkPad X230
dmi.sys.vendor: LENOVO
** Affects: firefox (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug trusty
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https://bugs.launchpad.net/bugs/1292911
Title:
firefox is pegging 2 CPUs at nearly 100%
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