[Bug 963420] Re: https download performance significantly worse in precise than lucid

[Brian Murray]

** Changed in: openssl (Ubuntu)
   Importance: Undecided => Medium

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Title:
  https download performance significantly worse in precise than lucid

Status in “openssl” package in Ubuntu:
  New
Status in “wget” package in Ubuntu:
  Confirmed

Bug description:
  In Canonical's openstack installation, I noticed during publishing
  images that downloads on lucid seemed to occur faster than I could do
  the same download on precise.

  $ wget https://cloud-images.ubuntu.com/precise/current/precise-server-
  cloudimg-amd64-disk1.img -O /dev/null

  In the above, cloud-images.ubuntu.com is located very close to the
  instance running, such that on lucid I routinely get > 40M/s.
  However, on precise I routinely top out at 10M/s, with the highest
  I've ever seen at 19M/s.  I once saw 49M/s on lucid.

  very strangely (and thus making this harder to isolate), if I change
  'https' above to 'http', both lucid and precise download in the
  65-80M/S range.

  Ie, https download is significantly slower in precise compared to
  lucid.

  One likely unrelated point, in EC2, using the url 
    https://ubuntu-data.s3.amazonaws.com/ebs/ubuntu-images/ubuntu-lucid-10.04-amd64-server-20100427.1.img.tar.gz
  from a m1.large instance, lucid and precise are both getting in the 25-30M/s range. With the http url they both get in the 40M/s range.

  Ie, there seems no real difference on EC2.

  I do realize that this is difficult to isolate, and it is even
  possible that my results are affected by other guests on the same host
  or load on the http server at that time.  However, the results have
  been very consistent over multiple days, over new instances.

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: linux-image-3.2.0-20-virtual 3.2.0-20.32
  ProcVersionSignature: User Name 3.2.0-20.32-virtual 3.2.12
  Uname: Linux 3.2.0-20-virtual x86_64
  AplayDevices: Error: [Errno 2] No such file or directory
  ApportVersion: 1.95-0ubuntu1
  Architecture: amd64
  ArecordDevices: Error: [Errno 2] No such file or directory
  AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1:
  CRDA: Error: command ['iw', 'reg', 'get'] failed with exit code 1: nl80211 not found.
  CurrentDmesg: [   21.910968] init: plymouth-upstart-bridge main process (712) killed by TERM signal
  Date: Fri Mar 23 19:29:54 2012
  Ec2AMI: ami-00000000
  Ec2AMIManifest: FIXME
  Ec2AvailabilityZone: nova
  Ec2InstanceType: m1.small
  Ec2Kernel: unavailable
  Ec2Ramdisk: unavailable
  IwConfig:
   lo        no wireless extensions.
   
   eth0      no wireless extensions.
  MachineType: Bochs Bochs
  PciMultimedia:
   
  ProcEnviron:
   TERM=screen
   PATH=(custom, user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcFB:
   
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-20-virtual root=UUID=bc55866c-8487-44b6-b0c7-56deac8b6a38 ro console=ttyS0
  RfKill: Error: [Errno 2] No such file or directory
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 01/01/2007
  dmi.bios.vendor: Bochs
  dmi.bios.version: Bochs
  dmi.chassis.type: 1
  dmi.chassis.vendor: Bochs
  dmi.modalias: dmi:bvnBochs:bvrBochs:bd01/01/2007:svnBochs:pnBochs:pvr:cvnBochs:ct1:cvr:
  dmi.product.name: Bochs
  dmi.sys.vendor: Bochs

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