[Kernel-packages] [Bug 1623143] Re: Linux container does not take same cpu configuration as kernet's hosts
** Package changed: linux (Ubuntu) => lxc (Ubuntu) ** Changed in: lxc (Ubuntu) Status: Confirmed => Triaged ** Changed in: lxc (Ubuntu) Assignee: (unassigned) => Christian Brauner (cbrauner) -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1623143 Title: Linux container does not take same cpu configuration as kernet's hosts Status in lxc package in Ubuntu: Triaged Bug description: When I configured cpu affinity on a ubuntu 16.04 with kernel version "4.4.0-36-generic" on a host containing 3 cpus: on /etc/default/grub: GRUB_CMDLINE_LINUX_DEFAULT="isolcpus=0" update-grub reboot The output of "cat /proc/self/status" : ubuntu@ubuntu:~$ cat /proc/self/status . . . Cpus_allowed: 6 Cpus_allowed_list:1-2 Mems_allowed: ,0001 Mems_allowed_list:0 voluntary_ctxt_switches: 0 nonvoluntary_ctxt_switches: 1 When I create an lxd container in this host using these commands: lxc launch ubuntu:14.04 my-ubuntu And access to this container using: lxc exec my-ubuntu -- /bin/bash The output of "cat /proc/self/status" : . . . Cpus_allowed: 7 Cpus_allowed_list:0-2 Mems_allowed: ,0001 Mems_allowed_list:0 voluntary_ctxt_switches: 0 nonvoluntary_ctxt_switches: 4 Result: Container's process doesn't take same configuration as host's process. Host process use 2 cpus: Cpus_allowed_list: 1-2 Container process use 3 cpus: Cpus_allowed_list: 0-2 ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: linux-image-4.4.0-36-generic 4.4.0-36.55 ProcVersionSignature: Ubuntu 4.4.0-36.55-generic 4.4.16 Uname: Linux 4.4.0-36-generic x86_64 AlsaVersion: Advanced Linux Sound Architecture Driver Version k4.4.0-36-generic. AplayDevices: Error: [Errno 2] No such file or directory: 'aplay' ApportVersion: 2.20.1-0ubuntu2 Architecture: amd64 ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord' AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/by-path', '/dev/snd/hwC0D0', '/dev/snd/pcmC0D0c', '/dev/snd/pcmC0D0p', '/dev/snd/controlC0', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1: Card0.Amixer.info: Error: [Errno 2] No such file or directory: 'amixer' Card0.Amixer.values: Error: [Errno 2] No such file or directory: 'amixer' Date: Tue Sep 13 18:36:29 2016 HibernationDevice: RESUME=/dev/mapper/ubuntu--vg-swap_1 InstallationDate: Installed on 2016-08-04 (40 days ago) InstallationMedia: Ubuntu-Server 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.3) IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig' Lsusb: Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub MachineType: QEMU Standard PC (i440FX + PIIX, 1996) ProcEnviron: TERM=xterm-256color PATH=(custom, no user) XDG_RUNTIME_DIR= LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: 0 qxldrmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.4.0-36-generic root=/dev/mapper/username--vg-root ro isolcpus=0 RelatedPackageVersions: linux-restricted-modules-4.4.0-36-generic N/A linux-backports-modules-4.4.0-36-generic N/A linux-firmware1.157 RfKill: Error: [Errno 2] No such file or directory: 'rfkill' SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 04/01/2014 dmi.bios.vendor: SeaBIOS dmi.bios.version: Ubuntu-1.8.2-1ubuntu1 dmi.chassis.type: 1 dmi.chassis.vendor: QEMU dmi.chassis.version: pc-i440fx-wily dmi.modalias: dmi:bvnSeaBIOS:bvrUbuntu-1.8.2-1ubuntu1:bd04/01/2014:svnQEMU:pnStandardPC(i440FX+PIIX,1996):pvrpc-i440fx-wily:cvnQEMU:ct1:cvrpc-i440fx-wily: dmi.product.name: Standard PC (i440FX + PIIX, 1996) dmi.product.version: pc-i440fx-wily dmi.sys.vendor: QEMU To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lxc/+bug/1623143/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
Re: [Kernel-packages] [Bug 1623143] Re: Linux container does not take same cpu configuration as kernet's hosts
On Thu, Sep 15, 2016 at 06:21:33PM -, Stéphane Graber wrote: > I'm assuming you have a system that's booted with the right kernel > option. > > Can you check if /sys/devices/system/cpu/possible includes the isolated > CPU? > > If not, then we could copy that value instead of having to parse the CPU > ranges from /sys/devices/system/cpu/isolated and substract that from the > range in the root cgroup which would be rather painful. Unfortunately it does include the isolated CPU. I'm not seeing anything that looks like it would give you the list of non-isolated cpus. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1623143 Title: Linux container does not take same cpu configuration as kernet's hosts Status in linux package in Ubuntu: Confirmed Bug description: When I configured cpu affinity on a ubuntu 16.04 with kernel version "4.4.0-36-generic" on a host containing 3 cpus: on /etc/default/grub: GRUB_CMDLINE_LINUX_DEFAULT="isolcpus=0" update-grub reboot The output of "cat /proc/self/status" : ubuntu@ubuntu:~$ cat /proc/self/status . . . Cpus_allowed: 6 Cpus_allowed_list:1-2 Mems_allowed: ,0001 Mems_allowed_list:0 voluntary_ctxt_switches: 0 nonvoluntary_ctxt_switches: 1 When I create an lxd container in this host using these commands: lxc launch ubuntu:14.04 my-ubuntu And access to this container using: lxc exec my-ubuntu -- /bin/bash The output of "cat /proc/self/status" : . . . Cpus_allowed: 7 Cpus_allowed_list:0-2 Mems_allowed: ,0001 Mems_allowed_list:0 voluntary_ctxt_switches: 0 nonvoluntary_ctxt_switches: 4 Result: Container's process doesn't take same configuration as host's process. Host process use 2 cpus: Cpus_allowed_list: 1-2 Container process use 3 cpus: Cpus_allowed_list: 0-2 ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: linux-image-4.4.0-36-generic 4.4.0-36.55 ProcVersionSignature: Ubuntu 4.4.0-36.55-generic 4.4.16 Uname: Linux 4.4.0-36-generic x86_64 AlsaVersion: Advanced Linux Sound Architecture Driver Version k4.4.0-36-generic. AplayDevices: Error: [Errno 2] No such file or directory: 'aplay' ApportVersion: 2.20.1-0ubuntu2 Architecture: amd64 ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord' AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/by-path', '/dev/snd/hwC0D0', '/dev/snd/pcmC0D0c', '/dev/snd/pcmC0D0p', '/dev/snd/controlC0', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1: Card0.Amixer.info: Error: [Errno 2] No such file or directory: 'amixer' Card0.Amixer.values: Error: [Errno 2] No such file or directory: 'amixer' Date: Tue Sep 13 18:36:29 2016 HibernationDevice: RESUME=/dev/mapper/ubuntu--vg-swap_1 InstallationDate: Installed on 2016-08-04 (40 days ago) InstallationMedia: Ubuntu-Server 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.3) IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig' Lsusb: Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub MachineType: QEMU Standard PC (i440FX + PIIX, 1996) ProcEnviron: TERM=xterm-256color PATH=(custom, no user) XDG_RUNTIME_DIR= LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: 0 qxldrmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.4.0-36-generic root=/dev/mapper/username--vg-root ro isolcpus=0 RelatedPackageVersions: linux-restricted-modules-4.4.0-36-generic N/A linux-backports-modules-4.4.0-36-generic N/A linux-firmware1.157 RfKill: Error: [Errno 2] No such file or directory: 'rfkill' SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 04/01/2014 dmi.bios.vendor: SeaBIOS dmi.bios.version: Ubuntu-1.8.2-1ubuntu1 dmi.chassis.type: 1 dmi.chassis.vendor: QEMU dmi.chassis.version: pc-i440fx-wily dmi.modalias: dmi:bvnSeaBIOS:bvrUbuntu-1.8.2-1ubuntu1:bd04/01/2014:svnQEMU:pnStandardPC(i440FX+PIIX,1996):pvrpc-i440fx-wily:cvnQEMU:ct1:cvrpc-i440fx-wily: dmi.product.name: Standard PC (i440FX + PIIX, 1996) dmi.product.version: pc-i440fx-wily dmi.sys.vendor: QEMU To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1623143/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
[Kernel-packages] [Bug 1623143] Re: Linux container does not take same cpu configuration as kernet's hosts
I'm assuming you have a system that's booted with the right kernel option. Can you check if /sys/devices/system/cpu/possible includes the isolated CPU? If not, then we could copy that value instead of having to parse the CPU ranges from /sys/devices/system/cpu/isolated and substract that from the range in the root cgroup which would be rather painful. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1623143 Title: Linux container does not take same cpu configuration as kernet's hosts Status in linux package in Ubuntu: Confirmed Bug description: When I configured cpu affinity on a ubuntu 16.04 with kernel version "4.4.0-36-generic" on a host containing 3 cpus: on /etc/default/grub: GRUB_CMDLINE_LINUX_DEFAULT="isolcpus=0" update-grub reboot The output of "cat /proc/self/status" : ubuntu@ubuntu:~$ cat /proc/self/status . . . Cpus_allowed: 6 Cpus_allowed_list:1-2 Mems_allowed: ,0001 Mems_allowed_list:0 voluntary_ctxt_switches: 0 nonvoluntary_ctxt_switches: 1 When I create an lxd container in this host using these commands: lxc launch ubuntu:14.04 my-ubuntu And access to this container using: lxc exec my-ubuntu -- /bin/bash The output of "cat /proc/self/status" : . . . Cpus_allowed: 7 Cpus_allowed_list:0-2 Mems_allowed: ,0001 Mems_allowed_list:0 voluntary_ctxt_switches: 0 nonvoluntary_ctxt_switches: 4 Result: Container's process doesn't take same configuration as host's process. Host process use 2 cpus: Cpus_allowed_list: 1-2 Container process use 3 cpus: Cpus_allowed_list: 0-2 ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: linux-image-4.4.0-36-generic 4.4.0-36.55 ProcVersionSignature: Ubuntu 4.4.0-36.55-generic 4.4.16 Uname: Linux 4.4.0-36-generic x86_64 AlsaVersion: Advanced Linux Sound Architecture Driver Version k4.4.0-36-generic. AplayDevices: Error: [Errno 2] No such file or directory: 'aplay' ApportVersion: 2.20.1-0ubuntu2 Architecture: amd64 ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord' AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/by-path', '/dev/snd/hwC0D0', '/dev/snd/pcmC0D0c', '/dev/snd/pcmC0D0p', '/dev/snd/controlC0', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1: Card0.Amixer.info: Error: [Errno 2] No such file or directory: 'amixer' Card0.Amixer.values: Error: [Errno 2] No such file or directory: 'amixer' Date: Tue Sep 13 18:36:29 2016 HibernationDevice: RESUME=/dev/mapper/ubuntu--vg-swap_1 InstallationDate: Installed on 2016-08-04 (40 days ago) InstallationMedia: Ubuntu-Server 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.3) IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig' Lsusb: Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub MachineType: QEMU Standard PC (i440FX + PIIX, 1996) ProcEnviron: TERM=xterm-256color PATH=(custom, no user) XDG_RUNTIME_DIR= LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: 0 qxldrmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.4.0-36-generic root=/dev/mapper/username--vg-root ro isolcpus=0 RelatedPackageVersions: linux-restricted-modules-4.4.0-36-generic N/A linux-backports-modules-4.4.0-36-generic N/A linux-firmware1.157 RfKill: Error: [Errno 2] No such file or directory: 'rfkill' SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 04/01/2014 dmi.bios.vendor: SeaBIOS dmi.bios.version: Ubuntu-1.8.2-1ubuntu1 dmi.chassis.type: 1 dmi.chassis.vendor: QEMU dmi.chassis.version: pc-i440fx-wily dmi.modalias: dmi:bvnSeaBIOS:bvrUbuntu-1.8.2-1ubuntu1:bd04/01/2014:svnQEMU:pnStandardPC(i440FX+PIIX,1996):pvrpc-i440fx-wily:cvnQEMU:ct1:cvrpc-i440fx-wily: dmi.product.name: Standard PC (i440FX + PIIX, 1996) dmi.product.version: pc-i440fx-wily dmi.sys.vendor: QEMU To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1623143/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
[Kernel-packages] [Bug 1623143] Re: Linux container does not take same cpu configuration as kernet's hosts
/sys/devices/system/cpu/isolated tells you which cpus are isolated. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1623143 Title: Linux container does not take same cpu configuration as kernet's hosts Status in linux package in Ubuntu: Confirmed Bug description: When I configured cpu affinity on a ubuntu 16.04 with kernel version "4.4.0-36-generic" on a host containing 3 cpus: on /etc/default/grub: GRUB_CMDLINE_LINUX_DEFAULT="isolcpus=0" update-grub reboot The output of "cat /proc/self/status" : ubuntu@ubuntu:~$ cat /proc/self/status . . . Cpus_allowed: 6 Cpus_allowed_list:1-2 Mems_allowed: ,0001 Mems_allowed_list:0 voluntary_ctxt_switches: 0 nonvoluntary_ctxt_switches: 1 When I create an lxd container in this host using these commands: lxc launch ubuntu:14.04 my-ubuntu And access to this container using: lxc exec my-ubuntu -- /bin/bash The output of "cat /proc/self/status" : . . . Cpus_allowed: 7 Cpus_allowed_list:0-2 Mems_allowed: ,0001 Mems_allowed_list:0 voluntary_ctxt_switches: 0 nonvoluntary_ctxt_switches: 4 Result: Container's process doesn't take same configuration as host's process. Host process use 2 cpus: Cpus_allowed_list: 1-2 Container process use 3 cpus: Cpus_allowed_list: 0-2 ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: linux-image-4.4.0-36-generic 4.4.0-36.55 ProcVersionSignature: Ubuntu 4.4.0-36.55-generic 4.4.16 Uname: Linux 4.4.0-36-generic x86_64 AlsaVersion: Advanced Linux Sound Architecture Driver Version k4.4.0-36-generic. AplayDevices: Error: [Errno 2] No such file or directory: 'aplay' ApportVersion: 2.20.1-0ubuntu2 Architecture: amd64 ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord' AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/by-path', '/dev/snd/hwC0D0', '/dev/snd/pcmC0D0c', '/dev/snd/pcmC0D0p', '/dev/snd/controlC0', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1: Card0.Amixer.info: Error: [Errno 2] No such file or directory: 'amixer' Card0.Amixer.values: Error: [Errno 2] No such file or directory: 'amixer' Date: Tue Sep 13 18:36:29 2016 HibernationDevice: RESUME=/dev/mapper/ubuntu--vg-swap_1 InstallationDate: Installed on 2016-08-04 (40 days ago) InstallationMedia: Ubuntu-Server 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.3) IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig' Lsusb: Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub MachineType: QEMU Standard PC (i440FX + PIIX, 1996) ProcEnviron: TERM=xterm-256color PATH=(custom, no user) XDG_RUNTIME_DIR= LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: 0 qxldrmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.4.0-36-generic root=/dev/mapper/username--vg-root ro isolcpus=0 RelatedPackageVersions: linux-restricted-modules-4.4.0-36-generic N/A linux-backports-modules-4.4.0-36-generic N/A linux-firmware1.157 RfKill: Error: [Errno 2] No such file or directory: 'rfkill' SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 04/01/2014 dmi.bios.vendor: SeaBIOS dmi.bios.version: Ubuntu-1.8.2-1ubuntu1 dmi.chassis.type: 1 dmi.chassis.vendor: QEMU dmi.chassis.version: pc-i440fx-wily dmi.modalias: dmi:bvnSeaBIOS:bvrUbuntu-1.8.2-1ubuntu1:bd04/01/2014:svnQEMU:pnStandardPC(i440FX+PIIX,1996):pvrpc-i440fx-wily:cvnQEMU:ct1:cvrpc-i440fx-wily: dmi.product.name: Standard PC (i440FX + PIIX, 1996) dmi.product.version: pc-i440fx-wily dmi.sys.vendor: QEMU To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1623143/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
[Kernel-packages] [Bug 1623143] Re: Linux container does not take same cpu configuration as kernet's hosts
I thought of looking at Cpus_allowed from the status file of the current task or of pid 1, but since both of those would be affected by the task being in a non-root cgroup, we can't rely on that. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1623143 Title: Linux container does not take same cpu configuration as kernet's hosts Status in linux package in Ubuntu: Confirmed Bug description: When I configured cpu affinity on a ubuntu 16.04 with kernel version "4.4.0-36-generic" on a host containing 3 cpus: on /etc/default/grub: GRUB_CMDLINE_LINUX_DEFAULT="isolcpus=0" update-grub reboot The output of "cat /proc/self/status" : ubuntu@ubuntu:~$ cat /proc/self/status . . . Cpus_allowed: 6 Cpus_allowed_list:1-2 Mems_allowed: ,0001 Mems_allowed_list:0 voluntary_ctxt_switches: 0 nonvoluntary_ctxt_switches: 1 When I create an lxd container in this host using these commands: lxc launch ubuntu:14.04 my-ubuntu And access to this container using: lxc exec my-ubuntu -- /bin/bash The output of "cat /proc/self/status" : . . . Cpus_allowed: 7 Cpus_allowed_list:0-2 Mems_allowed: ,0001 Mems_allowed_list:0 voluntary_ctxt_switches: 0 nonvoluntary_ctxt_switches: 4 Result: Container's process doesn't take same configuration as host's process. Host process use 2 cpus: Cpus_allowed_list: 1-2 Container process use 3 cpus: Cpus_allowed_list: 0-2 ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: linux-image-4.4.0-36-generic 4.4.0-36.55 ProcVersionSignature: Ubuntu 4.4.0-36.55-generic 4.4.16 Uname: Linux 4.4.0-36-generic x86_64 AlsaVersion: Advanced Linux Sound Architecture Driver Version k4.4.0-36-generic. AplayDevices: Error: [Errno 2] No such file or directory: 'aplay' ApportVersion: 2.20.1-0ubuntu2 Architecture: amd64 ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord' AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/by-path', '/dev/snd/hwC0D0', '/dev/snd/pcmC0D0c', '/dev/snd/pcmC0D0p', '/dev/snd/controlC0', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1: Card0.Amixer.info: Error: [Errno 2] No such file or directory: 'amixer' Card0.Amixer.values: Error: [Errno 2] No such file or directory: 'amixer' Date: Tue Sep 13 18:36:29 2016 HibernationDevice: RESUME=/dev/mapper/ubuntu--vg-swap_1 InstallationDate: Installed on 2016-08-04 (40 days ago) InstallationMedia: Ubuntu-Server 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.3) IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig' Lsusb: Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub MachineType: QEMU Standard PC (i440FX + PIIX, 1996) ProcEnviron: TERM=xterm-256color PATH=(custom, no user) XDG_RUNTIME_DIR= LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: 0 qxldrmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.4.0-36-generic root=/dev/mapper/username--vg-root ro isolcpus=0 RelatedPackageVersions: linux-restricted-modules-4.4.0-36-generic N/A linux-backports-modules-4.4.0-36-generic N/A linux-firmware1.157 RfKill: Error: [Errno 2] No such file or directory: 'rfkill' SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 04/01/2014 dmi.bios.vendor: SeaBIOS dmi.bios.version: Ubuntu-1.8.2-1ubuntu1 dmi.chassis.type: 1 dmi.chassis.vendor: QEMU dmi.chassis.version: pc-i440fx-wily dmi.modalias: dmi:bvnSeaBIOS:bvrUbuntu-1.8.2-1ubuntu1:bd04/01/2014:svnQEMU:pnStandardPC(i440FX+PIIX,1996):pvrpc-i440fx-wily:cvnQEMU:ct1:cvrpc-i440fx-wily: dmi.product.name: Standard PC (i440FX + PIIX, 1996) dmi.product.version: pc-i440fx-wily dmi.sys.vendor: QEMU To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1623143/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
[Kernel-packages] [Bug 1623143] Re: Linux container does not take same cpu configuration as kernet's hosts
So the problem here is that LXD itself DOES NOT touch the cpuset controller at all. liblxc does have some initialization code in place which will copy the parent value for cpuset.cpus and cpuset.mems if cgroup.clone_children hasn't been set to 1 yet. So I guess we'd need a change to the cgfsng backend of LXC to not propagate the value of the root but instead somehow figure out what CPUs are isolated and ignore those. Not sure what the right way is to get that information in a reliable way short of having to parse the kernel command line... -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1623143 Title: Linux container does not take same cpu configuration as kernet's hosts Status in linux package in Ubuntu: Confirmed Bug description: When I configured cpu affinity on a ubuntu 16.04 with kernel version "4.4.0-36-generic" on a host containing 3 cpus: on /etc/default/grub: GRUB_CMDLINE_LINUX_DEFAULT="isolcpus=0" update-grub reboot The output of "cat /proc/self/status" : ubuntu@ubuntu:~$ cat /proc/self/status . . . Cpus_allowed: 6 Cpus_allowed_list:1-2 Mems_allowed: ,0001 Mems_allowed_list:0 voluntary_ctxt_switches: 0 nonvoluntary_ctxt_switches: 1 When I create an lxd container in this host using these commands: lxc launch ubuntu:14.04 my-ubuntu And access to this container using: lxc exec my-ubuntu -- /bin/bash The output of "cat /proc/self/status" : . . . Cpus_allowed: 7 Cpus_allowed_list:0-2 Mems_allowed: ,0001 Mems_allowed_list:0 voluntary_ctxt_switches: 0 nonvoluntary_ctxt_switches: 4 Result: Container's process doesn't take same configuration as host's process. Host process use 2 cpus: Cpus_allowed_list: 1-2 Container process use 3 cpus: Cpus_allowed_list: 0-2 ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: linux-image-4.4.0-36-generic 4.4.0-36.55 ProcVersionSignature: Ubuntu 4.4.0-36.55-generic 4.4.16 Uname: Linux 4.4.0-36-generic x86_64 AlsaVersion: Advanced Linux Sound Architecture Driver Version k4.4.0-36-generic. AplayDevices: Error: [Errno 2] No such file or directory: 'aplay' ApportVersion: 2.20.1-0ubuntu2 Architecture: amd64 ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord' AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/by-path', '/dev/snd/hwC0D0', '/dev/snd/pcmC0D0c', '/dev/snd/pcmC0D0p', '/dev/snd/controlC0', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1: Card0.Amixer.info: Error: [Errno 2] No such file or directory: 'amixer' Card0.Amixer.values: Error: [Errno 2] No such file or directory: 'amixer' Date: Tue Sep 13 18:36:29 2016 HibernationDevice: RESUME=/dev/mapper/ubuntu--vg-swap_1 InstallationDate: Installed on 2016-08-04 (40 days ago) InstallationMedia: Ubuntu-Server 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.3) IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig' Lsusb: Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub MachineType: QEMU Standard PC (i440FX + PIIX, 1996) ProcEnviron: TERM=xterm-256color PATH=(custom, no user) XDG_RUNTIME_DIR= LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: 0 qxldrmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.4.0-36-generic root=/dev/mapper/username--vg-root ro isolcpus=0 RelatedPackageVersions: linux-restricted-modules-4.4.0-36-generic N/A linux-backports-modules-4.4.0-36-generic N/A linux-firmware1.157 RfKill: Error: [Errno 2] No such file or directory: 'rfkill' SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 04/01/2014 dmi.bios.vendor: SeaBIOS dmi.bios.version: Ubuntu-1.8.2-1ubuntu1 dmi.chassis.type: 1 dmi.chassis.vendor: QEMU dmi.chassis.version: pc-i440fx-wily dmi.modalias: dmi:bvnSeaBIOS:bvrUbuntu-1.8.2-1ubuntu1:bd04/01/2014:svnQEMU:pnStandardPC(i440FX+PIIX,1996):pvrpc-i440fx-wily:cvnQEMU:ct1:cvrpc-i440fx-wily: dmi.product.name: Standard PC (i440FX + PIIX, 1996) dmi.product.version: pc-i440fx-wily dmi.sys.vendor: QEMU To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1623143/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
[Kernel-packages] [Bug 1623143] Re: Linux container does not take same cpu configuration as kernet's hosts
@straber: I don't think this is a kernel bug after all. You said that LXD will not alter the CPU pinning in any way. But it must write _something_ to cpuset.cpus before you can add any tasks to the cgroup. So I assume that by "not altering" you mean it just copies the value from the parent cgroup. But by doing that you are including the isolated CPUs in the cpuset. And based on Documentation/kernel- parameters.txt, adding the isolated CPUs to the cpuset is a supported way of scheduling tasks to the isolated CPU. If the kernel be default inherited the cpuset.cpus value from its parent it would be reasonable for it to keep the same behavior wrt isolated CPUs. But since you have to write a value I don't think there's any way the kernel can know whether or not you meant to include isolated CPUs. I think LXD will have to exclude them unless explicitly told not to. Note that the base cpuset must contain all possible CPUs, as any child cpuset must be a subset of its parent. The behavior I describe in #7 is still a bit weird though. I missed a point there, that cpuset.cpus had been written to and so the scheduler domains were rebuilt. I suspect it has to do with the fact that the load balancer won't migrate tasks to/from isolated CPUs. If the first task you added to the set was on a non-isolated CPU then it won't be migrated to an isolated CPU. And since (I think) any of its children will start on the same CPU as the parent process they wouldn't be migrated to an isolated CPU either. So in effect it still excludes the isolated CPU despite the scheduler domain being recalculated. One other thing does look a bit fishy. The base cgroup is special in that the cpus_allowed for tasks excludes the isolated cpus unless explicitly allowed via the CPU affinity syscalls. But if I move the task to a child cpuset then back to the base cpuset it sill has the isolated CPUs present in cpus_allowed. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1623143 Title: Linux container does not take same cpu configuration as kernet's hosts Status in linux package in Ubuntu: Confirmed Bug description: When I configured cpu affinity on a ubuntu 16.04 with kernel version "4.4.0-36-generic" on a host containing 3 cpus: on /etc/default/grub: GRUB_CMDLINE_LINUX_DEFAULT="isolcpus=0" update-grub reboot The output of "cat /proc/self/status" : ubuntu@ubuntu:~$ cat /proc/self/status . . . Cpus_allowed: 6 Cpus_allowed_list:1-2 Mems_allowed: ,0001 Mems_allowed_list:0 voluntary_ctxt_switches: 0 nonvoluntary_ctxt_switches: 1 When I create an lxd container in this host using these commands: lxc launch ubuntu:14.04 my-ubuntu And access to this container using: lxc exec my-ubuntu -- /bin/bash The output of "cat /proc/self/status" : . . . Cpus_allowed: 7 Cpus_allowed_list:0-2 Mems_allowed: ,0001 Mems_allowed_list:0 voluntary_ctxt_switches: 0 nonvoluntary_ctxt_switches: 4 Result: Container's process doesn't take same configuration as host's process. Host process use 2 cpus: Cpus_allowed_list: 1-2 Container process use 3 cpus: Cpus_allowed_list: 0-2 ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: linux-image-4.4.0-36-generic 4.4.0-36.55 ProcVersionSignature: Ubuntu 4.4.0-36.55-generic 4.4.16 Uname: Linux 4.4.0-36-generic x86_64 AlsaVersion: Advanced Linux Sound Architecture Driver Version k4.4.0-36-generic. AplayDevices: Error: [Errno 2] No such file or directory: 'aplay' ApportVersion: 2.20.1-0ubuntu2 Architecture: amd64 ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord' AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/by-path', '/dev/snd/hwC0D0', '/dev/snd/pcmC0D0c', '/dev/snd/pcmC0D0p', '/dev/snd/controlC0', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1: Card0.Amixer.info: Error: [Errno 2] No such file or directory: 'amixer' Card0.Amixer.values: Error: [Errno 2] No such file or directory: 'amixer' Date: Tue Sep 13 18:36:29 2016 HibernationDevice: RESUME=/dev/mapper/ubuntu--vg-swap_1 InstallationDate: Installed on 2016-08-04 (40 days ago) InstallationMedia: Ubuntu-Server 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.3) IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig' Lsusb: Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub MachineType: QEMU Standard PC (i440FX + PIIX, 1996) ProcEnviron: TERM=xterm-256color PATH=(custom, no user) XDG_RUNTIME_DIR= LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: 0 qxldrmfb
[Kernel-packages] [Bug 1623143] Re: Linux container does not take same cpu configuration as kernet's hosts
The good news is that it looks like even though Cpus_allowed says CPU 0 is allowed the scheduler isn't going to actually schedule anything in the cgroup to that CPU until something induces the cpuset code to rebuild the scheduler domains. Primarily that would be writing to one of the cpuset.cpus files, but it looks like one or two other events might cause it to happen, such as CPU hotplug. This bears out experimentally; tasks scheduled within the cgroup as in the above script only get scheduled on CPUs 1-3. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1623143 Title: Linux container does not take same cpu configuration as kernet's hosts Status in linux package in Ubuntu: Confirmed Bug description: When I configured cpu affinity on a ubuntu 16.04 with kernel version "4.4.0-36-generic" on a host containing 3 cpus: on /etc/default/grub: GRUB_CMDLINE_LINUX_DEFAULT="isolcpus=0" update-grub reboot The output of "cat /proc/self/status" : ubuntu@ubuntu:~$ cat /proc/self/status . . . Cpus_allowed: 6 Cpus_allowed_list:1-2 Mems_allowed: ,0001 Mems_allowed_list:0 voluntary_ctxt_switches: 0 nonvoluntary_ctxt_switches: 1 When I create an lxd container in this host using these commands: lxc launch ubuntu:14.04 my-ubuntu And access to this container using: lxc exec my-ubuntu -- /bin/bash The output of "cat /proc/self/status" : . . . Cpus_allowed: 7 Cpus_allowed_list:0-2 Mems_allowed: ,0001 Mems_allowed_list:0 voluntary_ctxt_switches: 0 nonvoluntary_ctxt_switches: 4 Result: Container's process doesn't take same configuration as host's process. Host process use 2 cpus: Cpus_allowed_list: 1-2 Container process use 3 cpus: Cpus_allowed_list: 0-2 ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: linux-image-4.4.0-36-generic 4.4.0-36.55 ProcVersionSignature: Ubuntu 4.4.0-36.55-generic 4.4.16 Uname: Linux 4.4.0-36-generic x86_64 AlsaVersion: Advanced Linux Sound Architecture Driver Version k4.4.0-36-generic. AplayDevices: Error: [Errno 2] No such file or directory: 'aplay' ApportVersion: 2.20.1-0ubuntu2 Architecture: amd64 ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord' AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/by-path', '/dev/snd/hwC0D0', '/dev/snd/pcmC0D0c', '/dev/snd/pcmC0D0p', '/dev/snd/controlC0', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1: Card0.Amixer.info: Error: [Errno 2] No such file or directory: 'amixer' Card0.Amixer.values: Error: [Errno 2] No such file or directory: 'amixer' Date: Tue Sep 13 18:36:29 2016 HibernationDevice: RESUME=/dev/mapper/ubuntu--vg-swap_1 InstallationDate: Installed on 2016-08-04 (40 days ago) InstallationMedia: Ubuntu-Server 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.3) IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig' Lsusb: Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub MachineType: QEMU Standard PC (i440FX + PIIX, 1996) ProcEnviron: TERM=xterm-256color PATH=(custom, no user) XDG_RUNTIME_DIR= LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: 0 qxldrmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.4.0-36-generic root=/dev/mapper/username--vg-root ro isolcpus=0 RelatedPackageVersions: linux-restricted-modules-4.4.0-36-generic N/A linux-backports-modules-4.4.0-36-generic N/A linux-firmware1.157 RfKill: Error: [Errno 2] No such file or directory: 'rfkill' SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 04/01/2014 dmi.bios.vendor: SeaBIOS dmi.bios.version: Ubuntu-1.8.2-1ubuntu1 dmi.chassis.type: 1 dmi.chassis.vendor: QEMU dmi.chassis.version: pc-i440fx-wily dmi.modalias: dmi:bvnSeaBIOS:bvrUbuntu-1.8.2-1ubuntu1:bd04/01/2014:svnQEMU:pnStandardPC(i440FX+PIIX,1996):pvrpc-i440fx-wily:cvnQEMU:ct1:cvrpc-i440fx-wily: dmi.product.name: Standard PC (i440FX + PIIX, 1996) dmi.product.version: pc-i440fx-wily dmi.sys.vendor: QEMU To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1623143/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
[Kernel-packages] [Bug 1623143] Re: Linux container does not take same cpu configuration as kernet's hosts
It seems that the cpuset cgroup is causing this. Using the script below
I get this output:
In cgroup:
Cpus_allowed: f
Cpus_allowed_list: 0-3
Outside cgroup:
Cpus_allowed: e
Cpus_allowed_list: 1-3
The script:
#!/bin/bash
set -e
export CGDIR=/sys/fs/cgroup/cpuset/cpusets-$$
function cleanup {
rmdir $CGDIR
}
trap cleanup EXIT
mkdir $CGDIR
cat $CGDIR/../cpuset.mems > $CGDIR/cpuset.mems
cat $CGDIR/../cpuset.cpus > $CGDIR/cpuset.cpus
/bin/bash -s <<'EOF'
set -e
echo "$$" > $CGDIR/tasks
echo "In cgroup:"
cat /proc/self/status | grep ^Cpus_allowed
EOF
echo
echo "Outside cgroup:"
cat /proc/self/status | grep ^Cpus_allowed
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https://bugs.launchpad.net/bugs/1623143
Title:
Linux container does not take same cpu configuration as kernet's hosts
Status in linux package in Ubuntu:
Confirmed
Bug description:
When I configured cpu affinity on a ubuntu 16.04 with kernel version
"4.4.0-36-generic" on a host containing 3 cpus:
on /etc/default/grub:
GRUB_CMDLINE_LINUX_DEFAULT="isolcpus=0"
update-grub
reboot
The output of "cat /proc/self/status" :
ubuntu@ubuntu:~$ cat /proc/self/status
.
.
.
Cpus_allowed: 6
Cpus_allowed_list:1-2
Mems_allowed: ,0001
Mems_allowed_list:0
voluntary_ctxt_switches: 0
nonvoluntary_ctxt_switches: 1
When I create an lxd container in this host using these commands:
lxc launch ubuntu:14.04 my-ubuntu
And access to this container using:
lxc exec my-ubuntu -- /bin/bash
The output of "cat /proc/self/status" :
.
.
.
Cpus_allowed: 7
Cpus_allowed_list:0-2
Mems_allowed: ,0001
Mems_allowed_list:0
voluntary_ctxt_switches: 0
nonvoluntary_ctxt_switches: 4
Result: Container's process doesn't take same configuration as host's process.
Host process use 2 cpus: Cpus_allowed_list: 1-2
Container process use 3 cpus: Cpus_allowed_list: 0-2
ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: linux-image-4.4.0-36-generic 4.4.0-36.55
ProcVersionSignature: Ubuntu 4.4.0-36.55-generic 4.4.16
Uname: Linux 4.4.0-36-generic x86_64
AlsaVersion: Advanced Linux Sound Architecture Driver Version
k4.4.0-36-generic.
AplayDevices: Error: [Errno 2] No such file or directory: 'aplay'
ApportVersion: 2.20.1-0ubuntu2
Architecture: amd64
ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord'
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/by-path',
'/dev/snd/hwC0D0', '/dev/snd/pcmC0D0c', '/dev/snd/pcmC0D0p',
'/dev/snd/controlC0', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1:
Card0.Amixer.info: Error: [Errno 2] No such file or directory: 'amixer'
Card0.Amixer.values: Error: [Errno 2] No such file or directory: 'amixer'
Date: Tue Sep 13 18:36:29 2016
HibernationDevice: RESUME=/dev/mapper/ubuntu--vg-swap_1
InstallationDate: Installed on 2016-08-04 (40 days ago)
InstallationMedia: Ubuntu-Server 16.04 LTS "Xenial Xerus" - Release amd64
(20160420.3)
IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig'
Lsusb:
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
MachineType: QEMU Standard PC (i440FX + PIIX, 1996)
ProcEnviron:
TERM=xterm-256color
PATH=(custom, no user)
XDG_RUNTIME_DIR=
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcFB: 0 qxldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.4.0-36-generic
root=/dev/mapper/username--vg-root ro isolcpus=0
RelatedPackageVersions:
linux-restricted-modules-4.4.0-36-generic N/A
linux-backports-modules-4.4.0-36-generic N/A
linux-firmware1.157
RfKill: Error: [Errno 2] No such file or directory: 'rfkill'
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 04/01/2014
dmi.bios.vendor: SeaBIOS
dmi.bios.version: Ubuntu-1.8.2-1ubuntu1
dmi.chassis.type: 1
dmi.chassis.vendor: QEMU
dmi.chassis.version: pc-i440fx-wily
dmi.modalias:
dmi:bvnSeaBIOS:bvrUbuntu-1.8.2-1ubuntu1:bd04/01/2014:svnQEMU:pnStandardPC(i440FX+PIIX,1996):pvrpc-i440fx-wily:cvnQEMU:ct1:cvrpc-i440fx-wily:
dmi.product.name: Standard PC (i440FX + PIIX, 1996)
dmi.product.version: pc-i440fx-wily
dmi.sys.vendor: QEMU
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[Kernel-packages] [Bug 1623143] Re: Linux container does not take same cpu configuration as kernet's hosts
Did this issue start happening after an update/upgrade? Was there a prior kernel version where you were not having this particular problem? Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v4.8 kernel[0]. If this bug is fixed in the mainline kernel, please add the following tag 'kernel-fixed-upstream'. If the mainline kernel does not fix this bug, please add the tag: 'kernel-bug-exists-upstream'. Once testing of the upstream kernel is complete, please mark this bug as "Confirmed". Thanks in advance. [0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.8-rc6 -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1623143 Title: Linux container does not take same cpu configuration as kernet's hosts Status in linux package in Ubuntu: Confirmed Bug description: When I configured cpu affinity on a ubuntu 16.04 with kernel version "4.4.0-36-generic" on a host containing 3 cpus: on /etc/default/grub: GRUB_CMDLINE_LINUX_DEFAULT="isolcpus=0" update-grub reboot The output of "cat /proc/self/status" : ubuntu@ubuntu:~$ cat /proc/self/status . . . Cpus_allowed: 6 Cpus_allowed_list:1-2 Mems_allowed: ,0001 Mems_allowed_list:0 voluntary_ctxt_switches: 0 nonvoluntary_ctxt_switches: 1 When I create an lxd container in this host using these commands: lxc launch ubuntu:14.04 my-ubuntu And access to this container using: lxc exec my-ubuntu -- /bin/bash The output of "cat /proc/self/status" : . . . Cpus_allowed: 7 Cpus_allowed_list:0-2 Mems_allowed: ,0001 Mems_allowed_list:0 voluntary_ctxt_switches: 0 nonvoluntary_ctxt_switches: 4 Result: Container's process doesn't take same configuration as host's process. Host process use 2 cpus: Cpus_allowed_list: 1-2 Container process use 3 cpus: Cpus_allowed_list: 0-2 ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: linux-image-4.4.0-36-generic 4.4.0-36.55 ProcVersionSignature: Ubuntu 4.4.0-36.55-generic 4.4.16 Uname: Linux 4.4.0-36-generic x86_64 AlsaVersion: Advanced Linux Sound Architecture Driver Version k4.4.0-36-generic. AplayDevices: Error: [Errno 2] No such file or directory: 'aplay' ApportVersion: 2.20.1-0ubuntu2 Architecture: amd64 ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord' AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/by-path', '/dev/snd/hwC0D0', '/dev/snd/pcmC0D0c', '/dev/snd/pcmC0D0p', '/dev/snd/controlC0', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1: Card0.Amixer.info: Error: [Errno 2] No such file or directory: 'amixer' Card0.Amixer.values: Error: [Errno 2] No such file or directory: 'amixer' Date: Tue Sep 13 18:36:29 2016 HibernationDevice: RESUME=/dev/mapper/ubuntu--vg-swap_1 InstallationDate: Installed on 2016-08-04 (40 days ago) InstallationMedia: Ubuntu-Server 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.3) IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig' Lsusb: Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub MachineType: QEMU Standard PC (i440FX + PIIX, 1996) ProcEnviron: TERM=xterm-256color PATH=(custom, no user) XDG_RUNTIME_DIR= LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: 0 qxldrmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.4.0-36-generic root=/dev/mapper/username--vg-root ro isolcpus=0 RelatedPackageVersions: linux-restricted-modules-4.4.0-36-generic N/A linux-backports-modules-4.4.0-36-generic N/A linux-firmware1.157 RfKill: Error: [Errno 2] No such file or directory: 'rfkill' SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 04/01/2014 dmi.bios.vendor: SeaBIOS dmi.bios.version: Ubuntu-1.8.2-1ubuntu1 dmi.chassis.type: 1 dmi.chassis.vendor: QEMU dmi.chassis.version: pc-i440fx-wily dmi.modalias: dmi:bvnSeaBIOS:bvrUbuntu-1.8.2-1ubuntu1:bd04/01/2014:svnQEMU:pnStandardPC(i440FX+PIIX,1996):pvrpc-i440fx-wily:cvnQEMU:ct1:cvrpc-i440fx-wily: dmi.product.name: Standard PC (i440FX + PIIX, 1996) dmi.product.version: pc-i440fx-wily dmi.sys.vendor: QEMU To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1623143/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
[Kernel-packages] [Bug 1623143] Re: Linux container does not take same cpu configuration as kernet's hosts
** Tags added: kernel-da-key ** Changed in: linux (Ubuntu) Importance: Medium => High -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1623143 Title: Linux container does not take same cpu configuration as kernet's hosts Status in linux package in Ubuntu: Confirmed Bug description: When I configured cpu affinity on a ubuntu 16.04 with kernel version "4.4.0-36-generic" on a host containing 3 cpus: on /etc/default/grub: GRUB_CMDLINE_LINUX_DEFAULT="isolcpus=0" update-grub reboot The output of "cat /proc/self/status" : ubuntu@ubuntu:~$ cat /proc/self/status . . . Cpus_allowed: 6 Cpus_allowed_list:1-2 Mems_allowed: ,0001 Mems_allowed_list:0 voluntary_ctxt_switches: 0 nonvoluntary_ctxt_switches: 1 When I create an lxd container in this host using these commands: lxc launch ubuntu:14.04 my-ubuntu And access to this container using: lxc exec my-ubuntu -- /bin/bash The output of "cat /proc/self/status" : . . . Cpus_allowed: 7 Cpus_allowed_list:0-2 Mems_allowed: ,0001 Mems_allowed_list:0 voluntary_ctxt_switches: 0 nonvoluntary_ctxt_switches: 4 Result: Container's process doesn't take same configuration as host's process. Host process use 2 cpus: Cpus_allowed_list: 1-2 Container process use 3 cpus: Cpus_allowed_list: 0-2 ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: linux-image-4.4.0-36-generic 4.4.0-36.55 ProcVersionSignature: Ubuntu 4.4.0-36.55-generic 4.4.16 Uname: Linux 4.4.0-36-generic x86_64 AlsaVersion: Advanced Linux Sound Architecture Driver Version k4.4.0-36-generic. AplayDevices: Error: [Errno 2] No such file or directory: 'aplay' ApportVersion: 2.20.1-0ubuntu2 Architecture: amd64 ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord' AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/by-path', '/dev/snd/hwC0D0', '/dev/snd/pcmC0D0c', '/dev/snd/pcmC0D0p', '/dev/snd/controlC0', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1: Card0.Amixer.info: Error: [Errno 2] No such file or directory: 'amixer' Card0.Amixer.values: Error: [Errno 2] No such file or directory: 'amixer' Date: Tue Sep 13 18:36:29 2016 HibernationDevice: RESUME=/dev/mapper/ubuntu--vg-swap_1 InstallationDate: Installed on 2016-08-04 (40 days ago) InstallationMedia: Ubuntu-Server 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.3) IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig' Lsusb: Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub MachineType: QEMU Standard PC (i440FX + PIIX, 1996) ProcEnviron: TERM=xterm-256color PATH=(custom, no user) XDG_RUNTIME_DIR= LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: 0 qxldrmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.4.0-36-generic root=/dev/mapper/username--vg-root ro isolcpus=0 RelatedPackageVersions: linux-restricted-modules-4.4.0-36-generic N/A linux-backports-modules-4.4.0-36-generic N/A linux-firmware1.157 RfKill: Error: [Errno 2] No such file or directory: 'rfkill' SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 04/01/2014 dmi.bios.vendor: SeaBIOS dmi.bios.version: Ubuntu-1.8.2-1ubuntu1 dmi.chassis.type: 1 dmi.chassis.vendor: QEMU dmi.chassis.version: pc-i440fx-wily dmi.modalias: dmi:bvnSeaBIOS:bvrUbuntu-1.8.2-1ubuntu1:bd04/01/2014:svnQEMU:pnStandardPC(i440FX+PIIX,1996):pvrpc-i440fx-wily:cvnQEMU:ct1:cvrpc-i440fx-wily: dmi.product.name: Standard PC (i440FX + PIIX, 1996) dmi.product.version: pc-i440fx-wily dmi.sys.vendor: QEMU To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1623143/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
[Kernel-packages] [Bug 1623143] Re: Linux container does not take same cpu configuration as kernet's hosts
** Changed in: linux (Ubuntu) Importance: Undecided => Medium -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1623143 Title: Linux container does not take same cpu configuration as kernet's hosts Status in linux package in Ubuntu: Confirmed Bug description: When I configured cpu affinity on a ubuntu 16.04 with kernel version "4.4.0-36-generic" on a host containing 3 cpus: on /etc/default/grub: GRUB_CMDLINE_LINUX_DEFAULT="isolcpus=0" update-grub reboot The output of "cat /proc/self/status" : ubuntu@ubuntu:~$ cat /proc/self/status . . . Cpus_allowed: 6 Cpus_allowed_list:1-2 Mems_allowed: ,0001 Mems_allowed_list:0 voluntary_ctxt_switches: 0 nonvoluntary_ctxt_switches: 1 When I create an lxd container in this host using these commands: lxc launch ubuntu:14.04 my-ubuntu And access to this container using: lxc exec my-ubuntu -- /bin/bash The output of "cat /proc/self/status" : . . . Cpus_allowed: 7 Cpus_allowed_list:0-2 Mems_allowed: ,0001 Mems_allowed_list:0 voluntary_ctxt_switches: 0 nonvoluntary_ctxt_switches: 4 Result: Container's process doesn't take same configuration as host's process. Host process use 2 cpus: Cpus_allowed_list: 1-2 Container process use 3 cpus: Cpus_allowed_list: 0-2 ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: linux-image-4.4.0-36-generic 4.4.0-36.55 ProcVersionSignature: Ubuntu 4.4.0-36.55-generic 4.4.16 Uname: Linux 4.4.0-36-generic x86_64 AlsaVersion: Advanced Linux Sound Architecture Driver Version k4.4.0-36-generic. AplayDevices: Error: [Errno 2] No such file or directory: 'aplay' ApportVersion: 2.20.1-0ubuntu2 Architecture: amd64 ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord' AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/by-path', '/dev/snd/hwC0D0', '/dev/snd/pcmC0D0c', '/dev/snd/pcmC0D0p', '/dev/snd/controlC0', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1: Card0.Amixer.info: Error: [Errno 2] No such file or directory: 'amixer' Card0.Amixer.values: Error: [Errno 2] No such file or directory: 'amixer' Date: Tue Sep 13 18:36:29 2016 HibernationDevice: RESUME=/dev/mapper/ubuntu--vg-swap_1 InstallationDate: Installed on 2016-08-04 (40 days ago) InstallationMedia: Ubuntu-Server 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.3) IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig' Lsusb: Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub MachineType: QEMU Standard PC (i440FX + PIIX, 1996) ProcEnviron: TERM=xterm-256color PATH=(custom, no user) XDG_RUNTIME_DIR= LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: 0 qxldrmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.4.0-36-generic root=/dev/mapper/username--vg-root ro isolcpus=0 RelatedPackageVersions: linux-restricted-modules-4.4.0-36-generic N/A linux-backports-modules-4.4.0-36-generic N/A linux-firmware1.157 RfKill: Error: [Errno 2] No such file or directory: 'rfkill' SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 04/01/2014 dmi.bios.vendor: SeaBIOS dmi.bios.version: Ubuntu-1.8.2-1ubuntu1 dmi.chassis.type: 1 dmi.chassis.vendor: QEMU dmi.chassis.version: pc-i440fx-wily dmi.modalias: dmi:bvnSeaBIOS:bvrUbuntu-1.8.2-1ubuntu1:bd04/01/2014:svnQEMU:pnStandardPC(i440FX+PIIX,1996):pvrpc-i440fx-wily:cvnQEMU:ct1:cvrpc-i440fx-wily: dmi.product.name: Standard PC (i440FX + PIIX, 1996) dmi.product.version: pc-i440fx-wily dmi.sys.vendor: QEMU To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1623143/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
[Kernel-packages] [Bug 1623143] Re: Linux container does not take same cpu configuration as kernet's hosts
Seems correct to have this tracked as a kernel bug. Unless you set limits.cpu in LXD, LXD will not alter the cpu pinning in any way. And even if it did, it'd do so through the cpuset cgroup, which shouldn't allow a sub-cgroup to be any more permissive than the root cgroup. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1623143 Title: Linux container does not take same cpu configuration as kernet's hosts Status in linux package in Ubuntu: Confirmed Bug description: When I configured cpu affinity on a ubuntu 16.04 with kernel version "4.4.0-36-generic" on a host containing 3 cpus: on /etc/default/grub: GRUB_CMDLINE_LINUX_DEFAULT="isolcpus=0" update-grub reboot The output of "cat /proc/self/status" : ubuntu@ubuntu:~$ cat /proc/self/status . . . Cpus_allowed: 6 Cpus_allowed_list:1-2 Mems_allowed: ,0001 Mems_allowed_list:0 voluntary_ctxt_switches: 0 nonvoluntary_ctxt_switches: 1 When I create an lxd container in this host using these commands: lxc launch ubuntu:14.04 my-ubuntu And access to this container using: lxc exec my-ubuntu -- /bin/bash The output of "cat /proc/self/status" : . . . Cpus_allowed: 7 Cpus_allowed_list:0-2 Mems_allowed: ,0001 Mems_allowed_list:0 voluntary_ctxt_switches: 0 nonvoluntary_ctxt_switches: 4 Result: Container's process doesn't take same configuration as host's process. Host process use 2 cpus: Cpus_allowed_list: 1-2 Container process use 3 cpus: Cpus_allowed_list: 0-2 ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: linux-image-4.4.0-36-generic 4.4.0-36.55 ProcVersionSignature: Ubuntu 4.4.0-36.55-generic 4.4.16 Uname: Linux 4.4.0-36-generic x86_64 AlsaVersion: Advanced Linux Sound Architecture Driver Version k4.4.0-36-generic. AplayDevices: Error: [Errno 2] No such file or directory: 'aplay' ApportVersion: 2.20.1-0ubuntu2 Architecture: amd64 ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord' AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/by-path', '/dev/snd/hwC0D0', '/dev/snd/pcmC0D0c', '/dev/snd/pcmC0D0p', '/dev/snd/controlC0', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1: Card0.Amixer.info: Error: [Errno 2] No such file or directory: 'amixer' Card0.Amixer.values: Error: [Errno 2] No such file or directory: 'amixer' Date: Tue Sep 13 18:36:29 2016 HibernationDevice: RESUME=/dev/mapper/ubuntu--vg-swap_1 InstallationDate: Installed on 2016-08-04 (40 days ago) InstallationMedia: Ubuntu-Server 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.3) IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig' Lsusb: Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub MachineType: QEMU Standard PC (i440FX + PIIX, 1996) ProcEnviron: TERM=xterm-256color PATH=(custom, no user) XDG_RUNTIME_DIR= LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: 0 qxldrmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.4.0-36-generic root=/dev/mapper/username--vg-root ro isolcpus=0 RelatedPackageVersions: linux-restricted-modules-4.4.0-36-generic N/A linux-backports-modules-4.4.0-36-generic N/A linux-firmware1.157 RfKill: Error: [Errno 2] No such file or directory: 'rfkill' SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 04/01/2014 dmi.bios.vendor: SeaBIOS dmi.bios.version: Ubuntu-1.8.2-1ubuntu1 dmi.chassis.type: 1 dmi.chassis.vendor: QEMU dmi.chassis.version: pc-i440fx-wily dmi.modalias: dmi:bvnSeaBIOS:bvrUbuntu-1.8.2-1ubuntu1:bd04/01/2014:svnQEMU:pnStandardPC(i440FX+PIIX,1996):pvrpc-i440fx-wily:cvnQEMU:ct1:cvrpc-i440fx-wily: dmi.product.name: Standard PC (i440FX + PIIX, 1996) dmi.product.version: pc-i440fx-wily dmi.sys.vendor: QEMU To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1623143/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
[Kernel-packages] [Bug 1623143] Re: Linux container does not take same cpu configuration as kernet's hosts
As a workaround, you could do "lxc profile set default limits.cpu 1-2" which will have LXD setup the cpuset pinning for all containers to avoid CPU 0. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1623143 Title: Linux container does not take same cpu configuration as kernet's hosts Status in linux package in Ubuntu: Confirmed Bug description: When I configured cpu affinity on a ubuntu 16.04 with kernel version "4.4.0-36-generic" on a host containing 3 cpus: on /etc/default/grub: GRUB_CMDLINE_LINUX_DEFAULT="isolcpus=0" update-grub reboot The output of "cat /proc/self/status" : ubuntu@ubuntu:~$ cat /proc/self/status . . . Cpus_allowed: 6 Cpus_allowed_list:1-2 Mems_allowed: ,0001 Mems_allowed_list:0 voluntary_ctxt_switches: 0 nonvoluntary_ctxt_switches: 1 When I create an lxd container in this host using these commands: lxc launch ubuntu:14.04 my-ubuntu And access to this container using: lxc exec my-ubuntu -- /bin/bash The output of "cat /proc/self/status" : . . . Cpus_allowed: 7 Cpus_allowed_list:0-2 Mems_allowed: ,0001 Mems_allowed_list:0 voluntary_ctxt_switches: 0 nonvoluntary_ctxt_switches: 4 Result: Container's process doesn't take same configuration as host's process. Host process use 2 cpus: Cpus_allowed_list: 1-2 Container process use 3 cpus: Cpus_allowed_list: 0-2 ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: linux-image-4.4.0-36-generic 4.4.0-36.55 ProcVersionSignature: Ubuntu 4.4.0-36.55-generic 4.4.16 Uname: Linux 4.4.0-36-generic x86_64 AlsaVersion: Advanced Linux Sound Architecture Driver Version k4.4.0-36-generic. AplayDevices: Error: [Errno 2] No such file or directory: 'aplay' ApportVersion: 2.20.1-0ubuntu2 Architecture: amd64 ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord' AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/by-path', '/dev/snd/hwC0D0', '/dev/snd/pcmC0D0c', '/dev/snd/pcmC0D0p', '/dev/snd/controlC0', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1: Card0.Amixer.info: Error: [Errno 2] No such file or directory: 'amixer' Card0.Amixer.values: Error: [Errno 2] No such file or directory: 'amixer' Date: Tue Sep 13 18:36:29 2016 HibernationDevice: RESUME=/dev/mapper/ubuntu--vg-swap_1 InstallationDate: Installed on 2016-08-04 (40 days ago) InstallationMedia: Ubuntu-Server 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.3) IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig' Lsusb: Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub MachineType: QEMU Standard PC (i440FX + PIIX, 1996) ProcEnviron: TERM=xterm-256color PATH=(custom, no user) XDG_RUNTIME_DIR= LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: 0 qxldrmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.4.0-36-generic root=/dev/mapper/username--vg-root ro isolcpus=0 RelatedPackageVersions: linux-restricted-modules-4.4.0-36-generic N/A linux-backports-modules-4.4.0-36-generic N/A linux-firmware1.157 RfKill: Error: [Errno 2] No such file or directory: 'rfkill' SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 04/01/2014 dmi.bios.vendor: SeaBIOS dmi.bios.version: Ubuntu-1.8.2-1ubuntu1 dmi.chassis.type: 1 dmi.chassis.vendor: QEMU dmi.chassis.version: pc-i440fx-wily dmi.modalias: dmi:bvnSeaBIOS:bvrUbuntu-1.8.2-1ubuntu1:bd04/01/2014:svnQEMU:pnStandardPC(i440FX+PIIX,1996):pvrpc-i440fx-wily:cvnQEMU:ct1:cvrpc-i440fx-wily: dmi.product.name: Standard PC (i440FX + PIIX, 1996) dmi.product.version: pc-i440fx-wily dmi.sys.vendor: QEMU To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1623143/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
[Kernel-packages] [Bug 1623143] Re: Linux container does not take same cpu configuration as kernet's hosts
** Summary changed: - Linux container does not take same cpu affinity as kernet's hosts + Linux container does not take same cpu configuration as kernet's hosts -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1623143 Title: Linux container does not take same cpu configuration as kernet's hosts Status in linux package in Ubuntu: Confirmed Bug description: When I configured cpu affinity on a ubuntu 16.04 with kernel version "4.4.0-36-generic" on a host containing 3 cpus: on /etc/default/grub: GRUB_CMDLINE_LINUX_DEFAULT="isolcpus=0" update-grub reboot The output of "cat /proc/self/status" : ubuntu@ubuntu:~$ cat /proc/self/status . . . Cpus_allowed: 6 Cpus_allowed_list:1-2 Mems_allowed: ,0001 Mems_allowed_list:0 voluntary_ctxt_switches: 0 nonvoluntary_ctxt_switches: 1 When I create an lxd container in this host using these commands: lxc launch ubuntu:14.04 my-ubuntu And access to this container using: lxc exec my-ubuntu -- /bin/bash The output of "cat /proc/self/status" : . . . Cpus_allowed: 7 Cpus_allowed_list:0-2 Mems_allowed: ,0001 Mems_allowed_list:0 voluntary_ctxt_switches: 0 nonvoluntary_ctxt_switches: 4 Result: Container's process doesn't take same configuration as host's process. Host process use 2 cpus: Cpus_allowed_list: 1-2 Container process use 3 cpus: Cpus_allowed_list: 0-2 ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: linux-image-4.4.0-36-generic 4.4.0-36.55 ProcVersionSignature: Ubuntu 4.4.0-36.55-generic 4.4.16 Uname: Linux 4.4.0-36-generic x86_64 AlsaVersion: Advanced Linux Sound Architecture Driver Version k4.4.0-36-generic. AplayDevices: Error: [Errno 2] No such file or directory: 'aplay' ApportVersion: 2.20.1-0ubuntu2 Architecture: amd64 ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord' AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/by-path', '/dev/snd/hwC0D0', '/dev/snd/pcmC0D0c', '/dev/snd/pcmC0D0p', '/dev/snd/controlC0', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1: Card0.Amixer.info: Error: [Errno 2] No such file or directory: 'amixer' Card0.Amixer.values: Error: [Errno 2] No such file or directory: 'amixer' Date: Tue Sep 13 18:36:29 2016 HibernationDevice: RESUME=/dev/mapper/ubuntu--vg-swap_1 InstallationDate: Installed on 2016-08-04 (40 days ago) InstallationMedia: Ubuntu-Server 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.3) IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig' Lsusb: Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub MachineType: QEMU Standard PC (i440FX + PIIX, 1996) ProcEnviron: TERM=xterm-256color PATH=(custom, no user) XDG_RUNTIME_DIR= LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: 0 qxldrmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.4.0-36-generic root=/dev/mapper/username--vg-root ro isolcpus=0 RelatedPackageVersions: linux-restricted-modules-4.4.0-36-generic N/A linux-backports-modules-4.4.0-36-generic N/A linux-firmware1.157 RfKill: Error: [Errno 2] No such file or directory: 'rfkill' SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 04/01/2014 dmi.bios.vendor: SeaBIOS dmi.bios.version: Ubuntu-1.8.2-1ubuntu1 dmi.chassis.type: 1 dmi.chassis.vendor: QEMU dmi.chassis.version: pc-i440fx-wily dmi.modalias: dmi:bvnSeaBIOS:bvrUbuntu-1.8.2-1ubuntu1:bd04/01/2014:svnQEMU:pnStandardPC(i440FX+PIIX,1996):pvrpc-i440fx-wily:cvnQEMU:ct1:cvrpc-i440fx-wily: dmi.product.name: Standard PC (i440FX + PIIX, 1996) dmi.product.version: pc-i440fx-wily dmi.sys.vendor: QEMU To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1623143/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
