I just had this on my 1 week old new laptop running Ubuntu 14.04.1. I
ran "strace -s 128 -p <PID>" where PID was the pid of initctl, and the
output looked like this (small excerpt only included):
poll([{fd=3, events=POLLIN}], 1, 4198964686) = 1 ([{fd=3, revents=POLLIN}])
poll([{fd=3, events=POLLIN}], 1, 4198964682) = 1 ([{fd=3, revents=POLLIN}])
poll([{fd=3, events=POLLIN}], 1, 4198964680) = 1 ([{fd=3, revents=POLLIN}])
poll([{fd=3, events=POLLIN}], 1, 4198964677) = 1 ([{fd=3, revents=POLLIN}])
poll([{fd=3, events=POLLIN}], 1, 4198964675) = 1 ([{fd=3, revents=POLLIN}])
poll([{fd=3, events=POLLIN}], 1, 4198964673) = 1 ([{fd=3, revents=POLLIN}])
poll([{fd=3, events=POLLIN}], 1, 4198964670) = 1 ([{fd=3, revents=POLLIN}])
poll([{fd=3, events=POLLIN}], 1, 4198964668) = 1 ([{fd=3, revents=POLLIN}])
poll([{fd=3, events=POLLIN}], 1, 4198964665) = 1 ([{fd=3, revents=POLLIN}])
poll([{fd=3, events=POLLIN}], 1, 4198964663) = 1 ([{fd=3, revents=POLLIN}])
poll([{fd=3, events=POLLIN}], 1, 4198964660) = 1 ([{fd=3, revents=POLLIN}])
poll([{fd=3, events=POLLIN}], 1, 4198964657) = 1 ([{fd=3, revents=POLLIN}])
poll([{fd=3, events=POLLIN}], 1, 4198964654) = 1 ([{fd=3, revents=POLLIN}])
poll([{fd=3, events=POLLIN}], 1, 4198964650) = 1 ([{fd=3, revents=POLLIN}])
poll([{fd=3, events=POLLIN}], 1, 4198964647) = 1 ([{fd=3, revents=POLLIN}])
poll([{fd=3, events=POLLIN}], 1, 4198964645) = 1 ([{fd=3, revents=POLLIN}])
poll([{fd=3, events=POLLIN}], 1, 4198964643) = 1 ([{fd=3, revents=POLLIN}])
poll([{fd=3, events=POLLIN}], 1, 4198964640) = 1 ([{fd=3, revents=POLLIN}])
poll([{fd=3, events=POLLIN}], 1, 4198964638) = 1 ([{fd=3, revents=POLLIN}])
poll([{fd=3, events=POLLIN}], 1, 4198964636) = 1 ([{fd=3, revents=POLLIN}])
poll([{fd=3, events=POLLIN}], 1, 4198964633) = 1 ([{fd=3, revents=POLLIN}])
poll([{fd=3, events=POLLIN}], 1, 4198964631) = 1 ([{fd=3, revents=POLLIN}])
poll([{fd=3, events=POLLIN}], 1, 4198964628) = 1 ([{fd=3, revents=POLLIN}])
I looked in /proc/PID/fd, and it looked like this:
dr-x------ 2 root root 0 okt. 21 07:50 .
dr-xr-xr-x 9 root root 0 okt. 20 10:58 ..
lrwx------ 1 root root 64 okt. 21 07:50 0 -> /dev/null
lrwx------ 1 root root 64 okt. 21 07:50 1 -> /dev/pts/14
lrwx------ 1 root root 64 okt. 21 07:50 2 -> /dev/pts/14
lrwx------ 1 root root 64 okt. 21 07:50 3 -> socket:[10190]
I also ran "lsof | grep 10190", and the output looked like this:
initctl 1268 root 3u unix 0xffff8800d719d400
0t0 10190 socket
Not sure any of this helps, but that's what it is showing while using
100% cpu. My laptop is a Toshiba Portege Z30 with a dual core i7-4510U
CPU. I'm running arch amd64.
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Touch seeded packages, which is subscribed to upstart in Ubuntu.
https://bugs.launchpad.net/bugs/1173915
Title:
initctl continuously takes 100% of CPU
Status in “upstart” package in Ubuntu:
Confirmed
Bug description:
Many programs are fairly slow to start on my computer, despite it
being relatively new (core i5). Suspecting a heavy CPU usage, I
started gnome-system-monitor: all processes were displayed at 0% CPU,
but the overall load was 1.33; 1.33; 1.34.
Using the "top" command, however, revealed the real CPU use, with the
"initctl" process taking 100%CPU, even 1 hour after startup.
I upgraded to roaring ringtail before checking this but the symptoms
were the same with quantal quetzal, so there is a fair chance the
causes were identical.
Regards
ProblemType: Bug
DistroRelease: Ubuntu 13.04
Package: upstart 1.8-0ubuntu1
ProcVersionSignature: Ubuntu 3.8.0-19.29-generic 3.8.8
Uname: Linux 3.8.0-19-generic x86_64
ApportVersion: 2.9.2-0ubuntu8
Architecture: amd64
CheckboxSubmission: 2deefc5fd2f1f0ae2fdd4bd781248a2a
CheckboxSystem: daed2f3d6643b4a84b4520a2427f8c2b
Date: Sun Apr 28 13:04:05 2013
ExecutablePath: /sbin/initctl
InstallationDate: Installed on 2012-12-15 (133 days ago)
InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Release amd64 (20121017.5)
MarkForUpload: True
ProcEnviron:
ProcKernelCmdline: BOOT_IMAGE=/boot/vmlinuz-3.8.0-19-generic
root=UUID=fa624f8f-d9d0-4b09-af8b-88b106aaaf5b ro quiet splash vt.handoff=7
SourcePackage: upstart
UpgradeStatus: Upgraded to raring on 2013-04-28 (0 days ago)
UpstartBugCategory: System
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https://bugs.launchpad.net/ubuntu/+source/upstart/+bug/1173915/+subscriptions
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