On update_cfs_shares function issue.

Below is result of perf report:
..........................
       │ movslq 0x980(%rax),%rdx ▒
       │ mov 0xb8(%rcx),%rax ▒
       │ mov (%rax,%rdx,8),%r12 ▒
 25,00 │ test %r12,%r12 ▒
       │ ↓ je bc ▒
       │ nop ▒
       │ 3c: mov (%rdi),%rax ▒
       │ mov 0xd0(%rcx),%rdx ▒
       │ mov 0xc8(%rcx),%rcx ▒
       │ add %rax,%rdx ▒
       │ mov %rdx,%rsi ▒
       │ imul %rcx,%rax ▒
 25,00 │ sub 0x98(%rdi),%rsi ▒
       │ ↓ je 65 ▒
       │ cqto ▒
       │ idiv %rsi ▒
 25,00 │ 65: cmp $0x1,%rax ▒
       │ mov $0x2,%ebx ▒
       │ mov 0x38(%r12),%edx ▒
       │ cmova %rax,%rbx ◆
       │ mov 0x150(%r12),%r13 ▒
 25,00 │ cmp %rcx,%rbx ▒
       │ cmova %rcx,%rbx ▒
       │ test %edx,%edx ▒
       │ ↓ je d8

..............................
On alls cases will test with firefox and plugin-container from adobe.

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 3279 F.... pulseaudio
CurrentDesktop: XFCE
Date: Wed Jul 6 11:02:18 2016
InstallationDate: Installed on 2016-04-29 (67 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.