kernel-packages team mailing list archive
-
kernel-packages team
-
Mailing list archive
-
Message #73397
[Bug 995284] Re: High idle load on 64bit Ubuntu 12.04 with 3.2.0-24-generic kernel
Still there in ubuntu 14.04. We have an idle system with (basically)
nothing going on, and it hovers at 1.0:
ubuntu@build-globallogic:~$ uptime
11:09:18 up 6 days, 18:21, 1 user, load average: 1.00, 1.01, 1.05
ubuntu@build-globallogic:~$ uname -a
Linux build-globallogic 3.13.0-29-generic #53-Ubuntu SMP Wed Jun 4 21:00:20 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux
** Changed in: linux (Ubuntu)
Status: Expired => Confirmed
--
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/995284
Title:
High idle load on 64bit Ubuntu 12.04 with 3.2.0-24-generic kernel
Status in “linux” package in Ubuntu:
Confirmed
Bug description:
Since the update to 3.2.0-24-generic kernel and despite >90% of idle
CPU the load remains relatively high. On 3.2.0-17 it used to be barely
above 0, now it rarely drops below 1. Powertop also reports high power
usage by the CPU (~8W). The processor is 2.4GHz Intel i5-2430M and
going back to 3.2.0-17-generic solves these problems.
$ top
top - 23:27:42 up 26 min, 3 users, load average: 1.66, 1.80, 1.46
Tasks: 216 total, 1 running, 214 sleeping, 0 stopped, 1 zombie
Cpu(s): 0.2%us, 0.3%sy, 0.0%ni, 99.5%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Mem: 8082692k total, 2235412k used, 5847280k free, 159640k buffers
Swap: 8294396k total, 0k used, 8294396k free, 984832k cached
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
3764 rmo 20 0 1075m 260m 38m S 1 3.3 1:39.84 firefox
4514 rmo 20 0 17452 1512 1072 R 1 0.0 0:00.12 top
1772 root 20 0 236m 6628 5236 S 0 0.1 0:00.47 NetworkManager
2013 root 20 0 154m 23m 8008 S 0 0.3 1:09.09 Xorg
3294 rmo 20 0 1190m 74m 30m S 0 0.9 1:28.46 compiz
3501 rmo 20 0 575m 20m 11m S 0 0.3 0:10.38 gnome-terminal
1 root 20 0 24544 2516 1380 S 0 0.0 0:01.22 init
2 root 20 0 0 0 0 S 0 0.0 0:00.00 kthreadd
3 root 20 0 0 0 0 S 0 0.0 0:00.20 ksoftirqd/0
6 root RT 0 0 0 0 S 0 0.0 0:00.00 migration/0
8 root RT 0 0 0 0 S 0 0.0 0:00.00 migration/1
10 root 20 0 0 0 0 S 0 0.0 0:00.18 ksoftirqd/1
13 root RT 0 0 0 0 S 0 0.0 0:00.00 migration/2
14 root 20 0 0 0 0 S 0 0.0 0:00.60 kworker/2:0
15 root 20 0 0 0 0 S 0 0.0 0:00.09 ksoftirqd/2
17 root RT 0 0 0 0 S 0 0.0 0:00.00 migration/3
19 root 20 0 0 0 0 S 0 0.0 0:00.06 ksoftirqd/3
21 root 0 -20 0 0 0 S 0 0.0 0:00.00 cpuset
22 root 0 -20 0 0 0 S 0 0.0 0:00.00 khelper
23 root 20 0 0 0 0 S 0 0.0 0:00.00 kdevtmpfs
24 root 0 -20 0 0 0 S 0 0.0 0:00.00 netns
26 root 20 0 0 0 0 S 0 0.0 0:00.00 sync_supers
27 root 20 0 0 0 0 S 0 0.0 0:00.00 bdi-default
28 root 0 -20 0 0 0 S 0 0.0 0:00.00 kintegrityd
29 root 0 -20 0 0 0 S 0 0.0 0:00.00 kblockd
30 root 0 -20 0 0 0 S 0 0.0 0:00.00 ata_sff
31 root 20 0 0 0 0 S 0 0.0 0:00.01 khubd
32 root 0 -20 0 0 0 S 0 0.0 0:00.00 md
34 root 20 0 0 0 0 S 0 0.0 0:00.00 khungtaskd
35 root 20 0 0 0 0 S 0 0.0 0:00.00 kswapd0
36 root 25 5 0 0 0 S 0 0.0 0:00.00 ksmd
37 root 39 19 0 0 0 S 0 0.0 0:00.00 khugepaged
$ uname -a
Linux flax 3.2.0-24-generic #37-Ubuntu SMP Wed Apr 25 08:43:22 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux
I have compared CPU power usage (as reported by powertop) with the
same programs running and it seems that on the newer kernel it's
2-2.5W higher whether idle, when running a browser or playing a movie.
What other information should I include?
---
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
ApportVersion: 2.0.1-0ubuntu7
Architecture: amd64
ArecordDevices:
**** List of CAPTURE Hardware Devices ****
card 0: PCH [HDA Intel PCH], device 0: CONEXANT Analog [CONEXANT Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: rmo 3195 F.... pulseaudio
Card0.Amixer.info:
Card hw:0 'PCH'/'HDA Intel PCH at 0xf7f00000 irq 51'
Mixer name : 'Intel CougarPoint HDMI'
Components : 'HDA:14f1506e,10280510,00100002 HDA:80862805,80860101,00100000'
Controls : 15
Simple ctrls : 7
DistroRelease: Ubuntu 12.04
HibernationDevice: RESUME=UUID=3f6a429d-1aaa-4de1-b7c2-9e38a342e5f3
MachineType: Dell Inc. Vostro V131
Package: linux (not installed)
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.2.0-24-generic root=/dev/mapper/flax-root ro
ProcVersionSignature: Ubuntu 3.2.0-24.37-generic 3.2.14
RelatedPackageVersions:
linux-restricted-modules-3.2.0-24-generic N/A
linux-backports-modules-3.2.0-24-generic N/A
linux-firmware 1.79
SourcePackage: linux
StagingDrivers: mei
Tags: precise staging precise staging
Uname: Linux 3.2.0-24-generic x86_64
UpgradeStatus: Upgraded to precise on 2012-03-04 (65 days ago)
UserGroups: adm admin cdrom dialout libvirtd lpadmin plugdev sambashare
dmi.bios.date: 10/24/2011
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A03
dmi.board.name: 0X3GJK
dmi.board.vendor: Dell Inc.
dmi.board.version: A03
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.chassis.version: Not Specified
dmi.modalias: dmi:bvnDellInc.:bvrA03:bd10/24/2011:svnDellInc.:pnVostroV131:pvrNotSpecified:rvnDellInc.:rn0X3GJK:rvrA03:cvnDellInc.:ct8:cvrNotSpecified:
dmi.product.name: Vostro V131
dmi.product.version: Not Specified
dmi.sys.vendor: Dell Inc.
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/995284/+subscriptions
