kernel-packages team mailing list archive

[Oliver Weis <oliver@xxxxxxxxxxxxxx>]

Since todays kernel update (3.13.0-46.76 -> 3.13.0-46.77) I also see
this message in my kern.log  It has not been there before and I'm just
wondering what will happen if this continues as the "too long" value
seems to be continiously rising and the sample rate is being lowered

Mar  3 07:14:57 sigma kernel: [    9.748740] NFSD: starting 90-second grace period (net ffffffff81cdaa00)
Mar  3 07:16:26 sigma kernel: [  102.269932] ip_tables: (C) 2000-2006 Netfilter Core Team
Mar  3 07:16:26 sigma kernel: [  102.279642] nf_conntrack version 0.5.0 (16384 buckets, 65536 max)
Mar  3 07:16:26 sigma kernel: [  102.304003] ip6_tables: (C) 2000-2006 Netfilter Core Team
Mar  3 07:16:50 sigma kernel: [  126.135981] perf samples too long (2621 > 2500), lowering kernel.perf_event_max_sample_rate to 50000
Mar  3 07:23:11 sigma kernel: [  507.343615] perf samples too long (5025 > 5000), lowering kernel.perf_event_max_sample_rate to 25000
Mar  3 08:07:24 sigma kernel: [ 3159.511565] perf samples too long (10036 > 10000), lowering kernel.perf_event_max_sample_rate to 12500

Happens on a KVM based Ubuntu 14.04 with 12GB RAM and 4 Cores. Also
another problem is that IPv6 is not working any more during bootup after
todays kernel update thus nginx can not bind to the IPv6 address given
in the configuration and refuses to start up. Kernels should be tested
more before releasing these updates...

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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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