On update_blocked_averages function issue

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.