................................
│ │ mov %eax,0x170(%rbx)
▒
│ │↑ jbe db
▒
│ │ shr %edx
▒
│ │ mov $0xafb50401,%ecx
▒
│ │ shr %r8
▒
│ │ mov %edx,%eax
▒
│ │ mul %ecx
▒
│ │ movabs $0xafb504000afb5041,%rcx
▒
│ │ mov %r8,%rax
▒
│ │ shr $0xe,%edx
▒
│ │ mov %edx,%r15d
▒
│ │ mul %rcx
▒
│ │ shr $0xe,%rdx
▒
│ │ cmp $0x158,%rdi
▒
│ │ mov %rdx,%r14
▒
│ │↑ ja 109
▒
│ │ mov %rdx,0x8(%rsp)
▒
│ │ callq 0xffffffff810b2c10
▒
│ │ mov 0x8(%rsp),%rdx
▒
│ │↑ jmpq 109
▒
│1f4:│ mov %rdx,0x160(%rdi)
▒
│ │ mov 0x178(%rdi),%r14
▒
│ │↑ jmpq 127
▒
100,00 │207:│ movq $0x0,0x168(%rbx)
▒
│ │ movl $0x0,0x170(%rbx)
▒
│ │ xor %r14d,%r14d
▒
│ │ xor %edx,%edx
--
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:
Confirmed
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 : [email protected]
Unsubscribe : https://launchpad.net/~kernel-packages
More help : https://help.launchpad.net/ListHelp
