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[Cyking <1453391@xxxxxxxxxxxxxxxxxx>]

$ git clone git://kernel.ubuntu.com/ubuntu/ubuntu-vivid.git

Cloning into 'ubuntu-vivid'...
remote: Counting objects: 4488170, done.
remote: Compressing objects: 100% (703007/703007), done.
remote: Total 4488170 (delta 3769422), reused 4465814 (delta 3751407)
Receiving objects: 100% (4488170/4488170), 836.77 MiB | 732.00 KiB/s, done.
Resolving deltas: 100% (3769422/3769422), done.
Checking connectivity... done.
Checking out files: 100% (48949/48949), done.

$ cd ubuntu-vivid
$ git checkout -b mybisect origin/master

Branch mybisect set up to track remote branch master from origin.
Switched to a new branch 'mybisect'


$ git log --oneline Ubuntu-3.13.0-0.10..Ubuntu-3.19.0-9.9 drivers/net/ethernet/atheros/atl1e

9baa3c3 PCI: Remove DEFINE_PCI_DEVICE_TABLE macro use
1911826 atl1e: use pci_zalloc_consistent
a9690a8 atl1e: remove unnecessary break after return
537fae0 net: use SPEED_UNKNOWN and DUPLEX_UNKNOWN when appropriate
7ad24ea net: get rid of SET_ETHTOOL_OPS
d8e4435 atl1e: remove open-coded skb_cow_head.
3e3d354 ATHEROS-ATL1E: Convert iounmap to pci_iounmap
a81ab36 drivers/net: delete non-required instances of include <linux/init.h>
fb3a42f atl1e: update statistics code


$ git bisect start Ubuntu-3.13.0-0.10 Ubuntu-3.19.0-9.9

Bisecting: a merge base must be tested
[413541dd66d51f791a0b169d9b9014e4f56be13c] Linux 3.13-rc5


$ sudo apt-get build-dep linux-image-$(uname -r)

Reading package lists... Done
Building dependency tree
Reading state information... Done
Picking 'linux' as source package instead of 'linux-image-3.19.0-16-generic'
The following NEW packages will be installed:
  asciidoc bison debhelper dh-apparmor dh-systemd docbook-dsssl docbook-utils flex intltool-debian jadetex kernel-wedge libaudit-dev
  libbison-dev libdw-dev libdw1 libelf-dev libexpat1-dev libfl-dev libiberty-dev libnewt-dev libosp5 libostyle1c2 libpci-dev libpng12-dev
  libpython-dev libpython2.7-dev libsgmls-perl libslang2-dev libsp1c2 libudev-dev libunwind-dev libunwind8-dev makedumpfile openjade
  po-debconf python-dev python2.7-dev sgmlspl sp texlive-fonts-recommended tipa xmlto xsltproc
0 upgraded, 43 newly installed, 0 to remove and 0 not upgraded.
Need to get 35.3 MB of archives.
After this operation, 87.7 MB of additional disk space will be used.

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https://bugs.launchpad.net/bugs/1453391

Title:
  Very slow Qualcomm Atheros AR8121/AR8113/AR8114 Gigabit or Fast
  Ethernet (rev b0)

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  After upgrading form Ubuntu 14.04 to Ubuntu 15.04, my gigabit ethernet
  controller is performing very very poorly.  I get < 10mb throughput.

  ------

  lspic:

  02:00.0  controller: Qualcomm Atheros AR8121/AR8113/AR8114 Gigabit or
  Fast Ethernet (rev b0)

  lshw:
          *-pci:4
               description: PCI bridge
               product: 82801JI (ICH10 Family) PCI Express Root Port 6
               vendor: Intel Corporation
               physical id: 1c.5
               bus info: pci@0000:00:1c.5
               version: 00
               width: 32 bits
               clock: 33MHz
               capabilities: pci normal_decode bus_master cap_list
               configuration: driver=pcieport
               resources: irq:28 ioport:c000(size=4096) memory:fe800000-fe8fffff ioport:f0800000(size=2097152)
             *-network
                  description: Ethernet interface
                  product: AR8121/AR8113/AR8114 Gigabit or Fast Ethernet
                  vendor: Qualcomm Atheros
                  physical id: 0
                  bus info: pci@0000:02:00.0
                  logical name: eth0
                  version: b0
                  serial: XX:XX:XX:XX:XX:XX
                  size: 1Gbit/s
                  capacity: 1Gbit/s
                  width: 64 bits
                  clock: 33MHz
                  capabilities: bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation
                  configuration: autonegotiation=on broadcast=yes driver=ATL1E driverversion=1.0.0.7-NAPI duplex=full firmware=L1e ip=XX.XX.XX.XX latency=0 link=yes multicast=yes port=twisted pair speed=1Gbit/s
                  resources: irq:17 memory:fe8c0000-fe8fffff ioport:cc00(size=128)
  --- 
  ApportVersion: 2.17.2-0ubuntu1
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  test      23180 F.... pulseaudio
   /dev/snd/controlC1:  test      23180 F.... pulseaudio
  DistroRelease: Ubuntu 15.04
  EcryptfsInUse: Yes
  HibernationDevice: RESUME=UUID=87da39cd-1a60-4c53-927d-87ae037d7a6b
  InstallationDate: Installed on 2015-04-29 (10 days ago)
  InstallationMedia: Ubuntu-MATE 15.04 "Vivid Vervet" - Release amd64 (20150422.1)
  JournalErrors: Error: command ['journalctl', '-b', '--priority', 'warning'] failed with exit code 1: No journal files were found.
  MachineType: System manufacturer P5QL-E
  NonfreeKernelModules: fglrx
  Package: linux (not installed)
  ProcFB: 0 VESA VGA
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.19.0-16-generic root=UUID=6107da8b-9d18-4922-a432-27a560213d1c ro quiet splash nomdmonddf nomdmonisw vt.handoff=7
  ProcVersionSignature: Ubuntu 3.19.0-16.16-generic 3.19.3
  RelatedPackageVersions:
   linux-restricted-modules-3.19.0-16-generic N/A
   linux-backports-modules-3.19.0-16-generic  N/A
   linux-firmware                             1.143
  RfKill:
   
  Tags:  vivid
  UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev'
  Uname: Linux 3.19.0-16-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups:
   
  WifiSyslog:
   
  _MarkForUpload: True
  dmi.bios.date: 09/11/2009
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: 1104
  dmi.board.asset.tag: To Be Filled By O.E.M.
  dmi.board.name: P5QL-E
  dmi.board.vendor: ASUSTeK Computer INC.
  dmi.board.version: Rev 2.xx
  dmi.chassis.asset.tag: Asset-1234567890
  dmi.chassis.type: 3
  dmi.chassis.vendor: Chassis Manufacture
  dmi.chassis.version: Chassis Version
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr1104:bd09/11/2009:svnSystemmanufacturer:pnP5QL-E:pvrSystemVersion:rvnASUSTeKComputerINC.:rnP5QL-E:rvrRev2.xx:cvnChassisManufacture:ct3:cvrChassisVersion:
  dmi.product.name: P5QL-E
  dmi.product.version: System Version
  dmi.sys.vendor: System manufacturer

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