[Bug 1321415] [NEW] Big performance difference between debian and ubuntu guest

[Bryan Quigley]

Public bug reported:

Ubuntu trusty on trusty is substantially slower in apache benchmarks than debian on trusty.  You can use PTS to see the difference here:  http://openbenchmarking.org/result/1405191-PL-1405196PL73
I tested several releases and it does appear to be an Ubuntu vs Debian issue as opposed to a specific version.  It also appears to be true if Debian is the host instead.  The hosts have all been virtualized themselves (EC2, Virtualbox, kvm)

0. Started with m1.large image on canonistack (can give access if internal ip:10.55.60.136)
1. Install lxc and create an ubuntu trusty and debian jessie images, start them both.
 a. sudo lxc-create -t download -n ubuntu-trusty -- --dist ubuntu --release trusty --arch amd64
 b. sudo lxc-create -t download -n debian-jessie -- --dist debian --release jessie --arch amd64
2. Download and install PTS on both machines (I used lxc-attach...)
apt-get update; apt-get install wget; wget http://phoronix-test-suite.com/releases/repo/pts.debian/files/phoronix-test-suite_5.0.1_all.deb; dpkg -i phoronix-test-suite_5.0.1_all.deb; apt-get -f install
3. On both  phoronix-test-suite install apache.
4. Then one at a time have one run: phoronix-test-suite benchmark apache and choose to upload the results.  When it gives you the compare options, run that on the other node, phoronix-test-suite benchmark <insert the compare code after .../results/>

My results when doing the above, fresh:
http://openbenchmarking.org/result/1405209-PL-1405200PL71

We are seeing a similar issue with another apache workload (not public).

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

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https://bugs.launchpad.net/bugs/1321415

Title:
  Big performance difference between debian and ubuntu guest

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