1.1. beta image on AWS shows a constant load of 1.0

Bug #588564 reported by Josh Koenig
6
This bug affects 1 person
Affects Status Importance Assigned to Milestone
DEPRECATED Pantheon
Invalid
Medium
Greg Coit

Bug Description

This may be a general issue with Ubuntu Lucid on AWS, but it's somewhat creepy and we should know why a 100% idle system appears to be loaded:

top - 02:00:39 up 6:29, 1 user, load average: 1.20, 1.09, 1.24
Tasks: 94 total, 1 running, 93 sleeping, 0 stopped, 0 zombie
Cpu(s): 0.0%us, 0.0%sy, 0.0%ni,100.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st

Tags: ec2
Revision history for this message
Greg Coit (gregcoit) wrote :

This appears to be a general issue with AWS servers. See: http://developer.amazonwebservices.com/connect/thread.jspa?threadID=12930 (Mercury running on rackspace cloud shows avg load of .07).

Per http://www.redhat.com/docs/manuals/enterprise/RHEL-4-Manual/en-US/Reference_Guide/s2-proc-loadavg.html, the 4th value is the number of currently running processes and the total number of processes.

CPU load is zero, htop and iotop confirm no activity on the system.

This bug has been logged by others:

https://bugs.launchpad.net/ubuntu/+source/linux-ec2/+bug/574910

Changed in pantheon:
status: New → Triaged
Revision history for this message
Josh Koenig (joshkoenig) wrote :
Changed in pantheon:
status: Triaged → Invalid
Revision history for this message
Mindaugas Kiršanskas (mindaugas-kirsanskas) wrote :

Temporary workaround that worked for me was unloading intel_ips module. Regardless of kernel version voluntary context switching on idle system dropped 10 times.

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