Public bug reported:

I have had a problem where importing database was much slower in a dual-
boot machine when booted into ubuntu compared to running ubuntu inside
virtualbox in windows 10. It seems Ubuntu does not like Amd carrizo fch

I collected some information and posted here (and attached as text file to 
report):
https://answers.launchpad.net/ubuntu/+question/360373

To put it short, the disk performs up to 10 times better inside
virtualbox. (yes I thought about caches but VM box also has half the
memory and they must favor ubuntu running on real hardware with twice
ram....)

I believe this is a kernel/driver related problem since it directly
effects disk performance.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: linux-image-4.4.0-34-generic 4.4.0-34.53
ProcVersionSignature: Ubuntu 4.4.0-34.53-generic 4.4.15
Uname: Linux 4.4.0-34-generic x86_64
AlsaVersion: Advanced Linux Sound Architecture Driver Version k4.4.0-34-generic.
AplayDevices: Error: [Errno 2] No such file or directory: 'aplay'
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord'
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC1:  jobgo      3381 F.... pulseaudio
 /dev/snd/controlC0:  jobgo      3381 F.... pulseaudio
Card0.Amixer.info: Error: [Errno 2] No such file or directory: 'amixer'
Card0.Amixer.values: Error: [Errno 2] No such file or directory: 'amixer'
Card1.Amixer.info: Error: [Errno 2] No such file or directory: 'amixer'
Card1.Amixer.values: Error: [Errno 2] No such file or directory: 'amixer'
Date: Thu Aug 25 12:36:05 2016
HibernationDevice: RESUME=UUID=ba38c925-a729-4e33-a08f-a7573abd2826
InstallationDate: Installed on 2016-08-23 (1 days ago)
InstallationMedia: Ubuntu-Server 16.04.1 LTS "Xenial Xerus" - Release amd64 
(20160719)
IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig'
MachineType: HP HP Pavilion Notebook
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcFB: 0 amdgpudrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-34-generic.efi.signed 
root=UUID=cd8e7352-609f-4ebd-83ba-24335f6eece9 ro
PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No 
PulseAudio daemon running, or not running as session daemon.
RelatedPackageVersions:
 linux-restricted-modules-4.4.0-34-generic N/A
 linux-backports-modules-4.4.0-34-generic  N/A
 linux-firmware                            1.157.3
RfKill: Error: [Errno 2] No such file or directory: 'rfkill'
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 03/09/2016
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: F.17
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: 80B5
dmi.board.vendor: HP
dmi.board.version: 81.29
dmi.chassis.type: 10
dmi.chassis.vendor: HP
dmi.chassis.version: Chassis Version
dmi.modalias: 
dmi:bvnAmericanMegatrendsInc.:bvrF.17:bd03/09/2016:svnHP:pnHPPavilionNotebook:pvr:rvnHP:rn80B5:rvr81.29:cvnHP:ct10:cvrChassisVersion:
dmi.product.name: HP Pavilion Notebook
dmi.sys.vendor: HP

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


** Tags: amd64 apport-bug xenial

** Attachment added: "Info from the launchpad answers about the problem"
   https://bugs.launchpad.net/bugs/1616830/+attachment/4727452/+files/info.txt

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https://bugs.launchpad.net/bugs/1616830

Title:
  Bad disk performance with AMD Carrizo FCH controllers

Status in linux package in Ubuntu:
  New

Bug description:
  I have had a problem where importing database was much slower in a
  dual-boot machine when booted into ubuntu compared to running ubuntu
  inside virtualbox in windows 10. It seems Ubuntu does not like Amd
  carrizo fch

  I collected some information and posted here (and attached as text file to 
report):
  https://answers.launchpad.net/ubuntu/+question/360373

  To put it short, the disk performs up to 10 times better inside
  virtualbox. (yes I thought about caches but VM box also has half the
  memory and they must favor ubuntu running on real hardware with twice
  ram....)

  I believe this is a kernel/driver related problem since it directly
  effects disk performance.

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: linux-image-4.4.0-34-generic 4.4.0-34.53
  ProcVersionSignature: Ubuntu 4.4.0-34.53-generic 4.4.15
  Uname: Linux 4.4.0-34-generic x86_64
  AlsaVersion: Advanced Linux Sound Architecture Driver Version 
k4.4.0-34-generic.
  AplayDevices: Error: [Errno 2] No such file or directory: 'aplay'
  ApportVersion: 2.20.1-0ubuntu2.1
  Architecture: amd64
  ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord'
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  jobgo      3381 F.... pulseaudio
   /dev/snd/controlC0:  jobgo      3381 F.... pulseaudio
  Card0.Amixer.info: Error: [Errno 2] No such file or directory: 'amixer'
  Card0.Amixer.values: Error: [Errno 2] No such file or directory: 'amixer'
  Card1.Amixer.info: Error: [Errno 2] No such file or directory: 'amixer'
  Card1.Amixer.values: Error: [Errno 2] No such file or directory: 'amixer'
  Date: Thu Aug 25 12:36:05 2016
  HibernationDevice: RESUME=UUID=ba38c925-a729-4e33-a08f-a7573abd2826
  InstallationDate: Installed on 2016-08-23 (1 days ago)
  InstallationMedia: Ubuntu-Server 16.04.1 LTS "Xenial Xerus" - Release amd64 
(20160719)
  IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig'
  MachineType: HP HP Pavilion Notebook
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 amdgpudrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-34-generic.efi.signed 
root=UUID=cd8e7352-609f-4ebd-83ba-24335f6eece9 ro
  PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No 
PulseAudio daemon running, or not running as session daemon.
  RelatedPackageVersions:
   linux-restricted-modules-4.4.0-34-generic N/A
   linux-backports-modules-4.4.0-34-generic  N/A
   linux-firmware                            1.157.3
  RfKill: Error: [Errno 2] No such file or directory: 'rfkill'
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 03/09/2016
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: F.17
  dmi.board.asset.tag: Base Board Asset Tag
  dmi.board.name: 80B5
  dmi.board.vendor: HP
  dmi.board.version: 81.29
  dmi.chassis.type: 10
  dmi.chassis.vendor: HP
  dmi.chassis.version: Chassis Version
  dmi.modalias: 
dmi:bvnAmericanMegatrendsInc.:bvrF.17:bd03/09/2016:svnHP:pnHPPavilionNotebook:pvr:rvnHP:rn80B5:rvr81.29:cvnHP:ct10:cvrChassisVersion:
  dmi.product.name: HP Pavilion Notebook
  dmi.sys.vendor: HP

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