Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v4.7-rc1 kernel[0].
If this bug is fixed in the mainline kernel, please add the following tag 'kernel-fixed-upstream'. If the mainline kernel does not fix this bug, please add the tag: 'kernel-bug-exists-upstream'. Once testing of the upstream kernel is complete, please mark this bug as "Confirmed". Thanks in advance. [0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.7-rc3-yakkety/ -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1591487 Title: On funct remove_entity_load_avg issue. Status in linux package in Ubuntu: Triaged Bug description: On function remove_entity_load_avg from file http://lxr.free- electrons.com/source/kernel/sched/fair.c#L2647 http://lxr.free-electrons.com/source/kernel/sched/fair.c#L3000 my processor spent 100 cycles to move nonexistent data on %rbx. On this funct exist embbeded function with issue . Bellow isresult $perf record -e cycles -ag and thern perf report. remove_entity_load_avg /proc/kcore │ ▒ │ ▒ │ ▒ │ Disassembly of section load0: ▒ │ ▒ │ ffffffff810bbcb0 <load0>: ▒ │ nop ▒ │ push %rbp ◆ │ mov %rsp,%rbp ▒ │ push %r15 ▒ │ push %r14 ▒ │ push %r13 ▒ │ push %r12 ▒ │ push %rbx ▒ │ mov %rdi,%rbx ▒ │ and $0xfffffffffffffff0,%rsp ▒ │ sub $0x10,%rsp ▒ │ mov 0x150(%rdi),%r13 ▒ │ mov 0x60(%r13),%rdx ▒ │ mov %rdx,%rax ▒ │ sub 0x160(%rdi),%rax ▒ │ ↓ js 1f4 ▒ │ shr $0xa,%rax ▒ │ test %rax,%rax ▒ │ ↓ je 120 ▒ │ mov %rdx,0x160(%rdi) ▒ │ mov 0x174(%rdi),%edx ▒ │ mov %rdx,%rcx ▒ │ add %rax,%rdx ▒ │ cmp $0x3ff,%rdx ▒ │ ↓ jbe 14d ▒ │ mov $0x400,%edx ▒ │ movl $0x0,0x174(%rdi) ▒ │ sub %ecx,%edx ▒ │ sub %rdx,%rax ▒ │ mov %rax,%rdi ▒ │ and $0x3ff,%eax ▒ │ shr $0xa,%rdi ▒ Press 'h' for help on key bindings 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 3213 F...m pulseaudio /dev/snd/controlC0: asu 3213 F.... pulseaudio CurrentDesktop: MATE Date: Sat Jun 11 13:12:03 2016 InstallationDate: Installed on 2016-04-29 (42 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. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1591487/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
