Public bug reported:
Exist one situation on 64bit linux-kernel on every fuction (i'fill angry) on
perf exist
16,67 │ mov %rsp,%rbp
which spent 16 cycles.
This move from offset pointer reg to base pointer register , looking here for
more info
http://eli.thegreenplace.net/2011/09/06/stack-frame-layout-on-x86-64/
On 64 bit platform not need this.
ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: linux-image-4.4.0-22-generic 4.4.0-22.40
ProcVersionSignature: Ubuntu 4.4.0-22.40-generic 4.4.8
Uname: Linux 4.4.0-22-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/pcmC0D0p: asu 4579 F...m pulseaudio
/dev/snd/controlC0: asu 4579 F.... pulseaudio
CurrentDesktop: Unity
Date: Fri Jun 10 16:05:09 2016
InstallationDate: Installed on 2016-04-29 (41 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-4.4.0-22-generic
root=/dev/mapper/192--168--0--108--vg-root ro
RelatedPackageVersions:
linux-restricted-modules-4.4.0-22-generic N/A
linux-backports-modules-4.4.0-22-generic N/A
linux-firmware 1.157
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.
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug xenial
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You received this bug notification because you are a member of Kernel
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https://bugs.launchpad.net/bugs/1591193
Title:
Useless operation on proc registry
Status in linux package in Ubuntu:
New
Bug description:
Exist one situation on 64bit linux-kernel on every fuction (i'fill angry) on
perf exist
16,67 │ mov %rsp,%rbp
which spent 16 cycles.
This move from offset pointer reg to base pointer register , looking here for
more info
http://eli.thegreenplace.net/2011/09/06/stack-frame-layout-on-x86-64/
On 64 bit platform not need this.
ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: linux-image-4.4.0-22-generic 4.4.0-22.40
ProcVersionSignature: Ubuntu 4.4.0-22.40-generic 4.4.8
Uname: Linux 4.4.0-22-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/pcmC0D0p: asu 4579 F...m pulseaudio
/dev/snd/controlC0: asu 4579 F.... pulseaudio
CurrentDesktop: Unity
Date: Fri Jun 10 16:05:09 2016
InstallationDate: Installed on 2016-04-29 (41 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-4.4.0-22-generic
root=/dev/mapper/192--168--0--108--vg-root ro
RelatedPackageVersions:
linux-restricted-modules-4.4.0-22-generic N/A
linux-backports-modules-4.4.0-22-generic N/A
linux-firmware 1.157
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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