[Bug 635181] [NEW] High load average on Lucid for nominal/idle system use

[Chris]

Public bug reported:

This is a VBox guest.  It has been updated to the latest kernel.

Doing an rsync of a folder containing a large amount of data in sub
folders to an NFS mounted devices.   the load average will rise to +6
and render the console frozen.  Trying to login to the guest via ssh
will wait for 10 min before the tcp session times out.  Rebooting and
Trying again the system did not freeze, but the load average stays high.
Observations of iftop, iotop and top show no process is taking the
system resources (zero io on iftop and iotop).  could not Ctrl-C out of
rsync.  Forced to kill rsync pid.

Similar load average comes from doing intra vdi copies of large files.
Doing a DD of /dev/zero from the virtual system to a USB mounted devices
also causes the issue above.

Parent OS is also lucid with latest patches.  Moving large files from
one device to another causes similar load average.  Identical response.

After the #42 kernel load averages went from 50 to 5 but lack of
usability still remains.  Though the load average numbers are more
realistic, the issue of load averages climbing to high numbers for what
should be a modest request seems unreasonable.

Likewise when "idle" the systems exhibit load averages above 0.50 when
only a terminal is open on them.  (all VMs shutdown, no browser, etc
active).

ProblemType: Bug
DistroRelease: Ubuntu 10.04
Package: linux-image-2.6.32-24-generic 2.6.32-24.42
Regression: Yes
Reproducible: Yes
ProcVersionSignature: Ubuntu 2.6.32-24.42-generic 2.6.32.15+drm33.5
Uname: Linux 2.6.32-24-generic x86_64
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.21.
AplayDevices:
 **** List of PLAYBACK Hardware Devices ****
 card 0: I82801AAICH [Intel 82801AA-ICH], device 0: Intel ICH [Intel 82801AA-ICH]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
Architecture: amd64
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC0:  oc010000   1399 F.... pulseaudio
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
 Card hw:0 'I82801AAICH'/'Intel 82801AA-ICH with STAC9700,83,84 at irq 21'
   Mixer name	: 'SigmaTel STAC9700,83,84'
   Components	: 'AC97a:83847600'
   Controls      : 34
   Simple ctrls  : 24
Date: Fri Sep 10 12:42:38 2010
HibernationDevice: RESUME=UUID=9a57a528-17c6-4d64-ad60-955cefbb142e
InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release amd64 (20100429)
IwConfig:
 lo        no wireless extensions.
 
 eth0      no wireless extensions.
 
 eth1      no wireless extensions.
Lsusb:
 Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
 Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
MachineType: innotek GmbH VirtualBox
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.32-24-generic root=UUID=86816374-789f-498d-ba54-99093a90f759 ro quiet splash
ProcEnviron:
 LC_TIME=en_DK.utf8
 PATH=(custom, user)
 LANG=en_US.utf8
 SHELL=/bin/bash
RelatedPackageVersions: linux-firmware 1.34.1
RfKill:
 
SourcePackage: linux
dmi.bios.date: 12/01/2006
dmi.bios.vendor: innotek GmbH
dmi.bios.version: VirtualBox
dmi.modalias: dmi:bvninnotekGmbH:bvrVirtualBox:bd12/01/2006:svninnotekGmbH:pnVirtualBox:pvr1.2:
dmi.product.name: VirtualBox
dmi.product.version: 1.2
dmi.sys.vendor: innotek GmbH

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug kconfig lucid needs-upstream-testing regression-release

-- 
High load average on Lucid for nominal/idle system use
https://bugs.launchpad.net/bugs/635181
You received this bug notification because you are a member of Kernel
Bugs, which is subscribed to linux in ubuntu.