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[Brad Figg <brad.figg@xxxxxxxxxxxxx>]

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** Changed in: linux (Ubuntu)
       Status: New => Confirmed

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https://bugs.launchpad.net/bugs/1598529

Title:
  On update_blocked_averages function issue

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  Bellow is result of perf report:
  ..............................
         │       cmp    %rax,%r15                                                                                 ▒
         │     ↓ je     398                                                                                       ▒
         │       lea    -0xd8(%rax),%rbx                                                                          ▒
         │       mov    %r14,0x8(%rsp)                                                                            ▒
         │       movabs $0xafb504000afb5041,%r8                                                                   ▒
         │       mov    %r15,%r14                                                                                 ▒
         │ 71:   nop                                                                                              ▒
         │       mov    0x124(%rbx),%r11d                                                                         ▒
   26,56 │       test   %r11d,%r11d                                                                               ▒
         │     ↓ jne    426                                                                                       ▒
         │ 86:   mov    0xc8(%rbx),%rax                                                                           ▒
   17,97 │       mov    0x910(%rax),%rax                                                                          ▒
    1,56 │       sub    0x118(%rbx),%rax                                                                          ▒
         │ 9b:   mov    0xa0(%rbx),%rdx                                                                           ▒
   12,50 │       xor    %r15d,%r15d                                                                               ▒
         │       test   %rdx,%rdx                                                                                 ▒
         │     ↓ je     ea                                                                                        ▒
         │       xor    %ecx,%ecx                                                                                 ▒
         │       mov    %rcx,%rdx                                                                                 ▒
         │       xchg   %rdx,0xa0(%rbx)                                                                           ▒
         │       sub    %rdx,0x78(%rbx)                                                                           ▒
         │       mov    %rcx,%rsi                                                                                 ▒
         │       mov    $0x1,%r15d                                                                                ▒
         │       cmpq   $0x0,0x78(%rbx)    

  .................................

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: linux-image-4.4.0-28-generic 4.4.0-28.47
  ProcVersionSignature: Ubuntu 4.4.0-28.47-generic 4.4.13
  Uname: Linux 4.4.0-28-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2.1
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  asu        2987 F.... pulseaudio
  CurrentDesktop: MATE
  Date: Sun Jul  3 07:49:32 2016
  InstallationDate: Installed on 2016-04-29 (64 days ago)
  InstallationMedia: Ubuntu-Studio 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
  IwConfig:
   lo        no wireless extensions.
   
   enp1s0    no wireless extensions.
  MachineType: Olidata S.p.A. ALABAMA
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.4.0-28-generic root=/dev/mapper/192--168--0--108--vg-root ro
  RelatedPackageVersions:
   linux-restricted-modules-4.4.0-28-generic N/A
   linux-backports-modules-4.4.0-28-generic  N/A
   linux-firmware                            1.157.1
  RfKill:
   
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 07/08/2008
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: S0101
  dmi.board.asset.tag: To Be Filled By O.E.M.
  dmi.board.name: To be filled by O.E.M.
  dmi.board.vendor: To be filled by O.E.M.
  dmi.board.version: To be filled by O.E.M.
  dmi.chassis.asset.tag: To Be Filled By O.E.M.
  dmi.chassis.type: 3
  dmi.chassis.vendor: To Be Filled By O.E.M.
  dmi.chassis.version: To Be Filled By O.E.M.
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrS0101:bd07/08/2008:svnOlidataS.p.A.:pnALABAMA:pvrToBeFilledByO.E.M.:rvnTobefilledbyO.E.M.:rnTobefilledbyO.E.M.:rvrTobefilledbyO.E.M.:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.:
  dmi.product.name: ALABAMA
  dmi.product.version: To Be Filled By O.E.M.
  dmi.sys.vendor: Olidata S.p.A.

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