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[Bug 1246216] Re: perf samples too long (2519 > 2500), lowering kernel.perf_event_max_sample_rate to 50000

 

This message appears for me exactly before the wireless connection drops
on my Asus Z87-Pro motherboard. The wireless card in question is the:

Network controller [0280]: Qualcomm Atheros AR9462 Wireless Network
Adapter [168c:0034] (rev 01)

Using Ubuntu 14.04 64 Bit. Kerne l3.13.0-26-generic

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https://bugs.launchpad.net/bugs/1246216

Title:
  perf samples too long (2519 > 2500), lowering
  kernel.perf_event_max_sample_rate to 50000

Status in “linux” package in Ubuntu:
  Invalid

Bug description:
  This message appears in dmesg after a while every time system is
  booted up.

  "perf samples too long (2519 > 2500), lowering
  kernel.perf_event_max_sample_rate to 50000"

  ProblemType: Bug
  DistroRelease: Ubuntu 13.10
  Package: linux-image-3.11.0-12-generic 3.11.0-12.19
  ProcVersionSignature: Ubuntu 3.11.0-12.19-generic 3.11.3
  Uname: Linux 3.11.0-12-generic x86_64
  ApportVersion: 2.12.5-0ubuntu2.1
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  karlflux   1511 F.... pulseaudio
   /dev/snd/controlC0:  karlflux   1511 F.... pulseaudio
  Date: Wed Oct 30 10:15:23 2013
  EcryptfsInUse: Yes
  InstallationDate: Installed on 2013-10-02 (27 days ago)
  InstallationMedia: Xubuntu 13.10 "Saucy Salamander" - Beta amd64 (20130925.1)
  MachineType: ASUSTeK Computer Inc. K53BR
  MarkForUpload: True
  ProcFB:
   0 radeondrmfb
   1 radeondrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.11.0-12-generic root=UUID=b9724cb2-3973-4605-85f1-2f1777afd02a ro quiet splash radeon.dpm=1 vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.11.0-12-generic N/A
   linux-backports-modules-3.11.0-12-generic  N/A
   linux-firmware                             1.116
  RfKill:
   0: phy0: Wireless LAN
   	Soft blocked: no
   	Hard blocked: no
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  WifiSyslog:
   Oct 30 08:57:24 kohvi kernel: [ 1711.700492] perf samples too long (2519 > 2500), lowering kernel.perf_event_max_sample_rate to 50000
   Oct 30 09:12:29 kohvi NetworkManager[704]: <warn> nl_recvmsgs() error: (-33) Dump inconsistency detected, interrupted
   Oct 30 09:38:29 kohvi NetworkManager[704]: <warn> nl_recvmsgs() error: (-33) Dump inconsistency detected, interrupted
  dmi.bios.date: 04/25/2012
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: 207
  dmi.board.asset.tag: To be filled by O.E.M.
  dmi.board.name: K53BR
  dmi.board.vendor: ASUSTeK Computer Inc.
  dmi.board.version: 1.0
  dmi.chassis.asset.tag: No Asset Tag
  dmi.chassis.type: 10
  dmi.chassis.vendor: ASUSTeK Computer Inc.
  dmi.chassis.version: 1.0
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr207:bd04/25/2012:svnASUSTeKComputerInc.:pnK53BR:pvr1.0:rvnASUSTeKComputerInc.:rnK53BR:rvr1.0:cvnASUSTeKComputerInc.:ct10:cvr1.0:
  dmi.product.name: K53BR
  dmi.product.version: 1.0
  dmi.sys.vendor: ASUSTeK Computer Inc.

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References