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[Bug 1595310] Re: On do_select function issue.

 

With this patches on firefox , and flash player on my atom time
processor was decreased with 100-200 procents.

Tasks: 207 total,   6 running, 201 sleeping,   0 stopped,   0 zombie
%Cpu(s): 41,9 us, 12,0 sy,  0,0 ni, 45,8 id,  0,2 wa,  0,0 hi,  0,0 si,  0,0 st
KiB Mem :  2039812 total,    75408 free,  1071172 used,   893232 buff/cache
KiB Swap:        0 total,        0 free,        0 used.   671472 avail Mem 

  PID USER      PR  NI    VIRT    RES    SHR S  %CPU %MEM     TIME+ COMMAND                           
 5511 asu       20   0  885044 175284  58604 R  55,6  8,6  16:09.47 plugin-containe                   
 5443 asu       20   0 1007760 327468  94104 R  19,8 16,1   5:31.64 firefox                           
 1145 root      20   0  196016  36524  26612 S  15,1  1,8   8:45.92 Xorg                              
 2684 asu        9 -11  504432  10756   7600 S   6,0  0,5   5:34.99 pulseaudio                        
 6209 asu       20   0  567588  27436  22892 R   4,3  1,3   0:01.68 xfce4-terminal                    
 2615 asu       20   0  413860  24336  20680 S   2,6  1,2   1:20.17 xfwm4                             
 1238 asterisk  20   0 2009092  46336  14104 S   1,3  2,3   1:48.52 asterisk                          
 2474 asu       20   0  422592  20052  14108 R   1,3  1,0   0:16.56 bamfdaemon                        
 6221 asu       20   0   43464   3676   3052 R   1,3  0,2   0:00.21 top                               
 2623 asu       20   0  542004  38592  24060 S   0,4  1,9   0:10.31 xfdesktop                         
 2626 asu       20   0  237568  26044  10284 R   0,4  1,3   0:06.84 applet.py

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https://bugs.launchpad.net/bugs/1595310

Title:
  On  do_select function issue.

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  Here will try to reduce pression on poll oerations from 70 cycles to
  30 cycles .

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: linux-image-4.4.0-24-generic 4.4.0-24.43
  ProcVersionSignature: Ubuntu 4.4.0-24.43-generic 4.4.10
  Uname: Linux 4.4.0-24-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2.1
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  asu        3072 F.... pulseaudio
  CurrentDesktop: MATE
  Date: Wed Jun 22 22:41:42 2016
  InstallationDate: Installed on 2016-04-29 (54 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-4.4.0-24-generic root=/dev/mapper/192--168--0--108--vg-root ro
  RelatedPackageVersions:
   linux-restricted-modules-4.4.0-24-generic N/A
   linux-backports-modules-4.4.0-24-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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References