apport information ** Tags added: apport-collected ec2-images
** Description changed: Please can the intel_pstate driver be enabled by default on the Ubuntu EC2 AMIs. On instances with support for C-states and P-States [1] there is a notable performance impact and lack of support for higher clock frequencies available due to the use of the acpi-cpufreq driver. For example on a c4.8xlarge the default frequency is limited to 2.9GHz when 3.2GHz is supported by the chip [2]. Some additional analysis is available here [3] and re-enabling it by default has been discussed [4] but this request is specifically for the EC2 AMIs. [1] http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/processor_state_control.html [2] http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/c4-instances.html [3] http://www.deplication.net/2015/07/c-states-and-p-states-with-ubuntu-1404.html [4] https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1188647 AMI: ami-47a23a30 (eu-west-1) $ lsb_release -d Description: Ubuntu 14.04.2 LTS $ uname -a Linux ip-172-31-8-218 3.13.0-57-generic #95-Ubuntu SMP Fri Jun 19 09:28:15 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux Default configuration (c4.8xl): $ sudo cpupower frequency-info analyzing CPU 0: driver: acpi-cpufreq CPUs which run at the same hardware frequency: 0 CPUs which need to have their frequency coordinated by software: 0 maximum transition latency: 10.0 us. hardware limits: 1.20 GHz - 2.90 GHz available frequency steps: 2.90 GHz, 2.90 GHz, 2.80 GHz, 2.70 GHz, 2.50 GHz, 2.40 GHz, 2.30 GHz, 2.20 GHz, 2.00 GHz, 1.90 GHz, 1.80 GHz, 1.70 GHz, 1.60 GHz, 1.40 GHz, 1.30 GHz, 1.20 GHz available cpufreq governors: conservative, ondemand, userspace, powersave, performance current policy: frequency should be within 1.20 GHz and 2.90 GHz. The governor "ondemand" may decide which speed to use within this range. current CPU frequency is 1.20 GHz (asserted by call to hardware). cpufreq stats: 2.90 GHz:70.40%, 2.90 GHz:0.00%, 2.80 GHz:0.00%, 2.70 GHz:0.00%, 2.50 GHz:0.00%, 2.40 GHz:0.00%, 2.30 GHz:0.00%, 2.20 GHz:0.00%, 2.00 GHz:0.00%, 1.90 GHz:0.00%, 1.80 GHz:0.00%, 1.70 GHz:0.00%, 1.60 GHz:0.09%, 1.40 GHz:0.00%, 1.30 GHz:0.00%, 1.20 GHz:29.51% (5) boost state support: Supported: yes Active: yes With intel_pstate enabled (c4.8xl): $ sudo cpupower frequency-info analyzing CPU 0: driver: intel_pstate CPUs which run at the same hardware frequency: 0 CPUs which need to have their frequency coordinated by software: 0 maximum transition latency: 0.97 ms. hardware limits: 1.20 GHz - 3.50 GHz available cpufreq governors: performance, powersave current policy: frequency should be within 1.20 GHz and 3.50 GHz. The governor "performance" may decide which speed to use within this range. current CPU frequency is 3.20 GHz (asserted by call to hardware). boost state support: Supported: yes Active: yes + --- + AlsaDevices: + total 0 + crw-rw---- 1 root audio 116, 1 Aug 12 17:19 seq + crw-rw---- 1 root audio 116, 33 Aug 12 17:19 timer + AplayDevices: Error: [Errno 2] No such file or directory + ApportVersion: 2.14.1-0ubuntu3.11 + Architecture: amd64 + ArecordDevices: Error: [Errno 2] No such file or directory + AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1: + CRDA: Error: [Errno 2] No such file or directory + CurrentDmesg: [39221.196411] init: plymouth-upstart-bridge main process ended, respawning + DistroRelease: Ubuntu 14.04 + Ec2AMI: ami-47a23a30 + Ec2AMIManifest: (unknown) + Ec2AvailabilityZone: eu-west-1b + Ec2InstanceType: c4.8xlarge + Ec2Kernel: unavailable + Ec2Ramdisk: unavailable + IwConfig: Error: [Errno 2] No such file or directory + Lsusb: Error: command ['lsusb'] failed with exit code 1: unable to initialize libusb: -99 + MachineType: Xen HVM domU + Package: linux (not installed) + PciMultimedia: + + ProcEnviron: + TERM=xterm + PATH=(custom, no user) + XDG_RUNTIME_DIR=<set> + LANG=en_US.UTF-8 + SHELL=/bin/bash + ProcFB: + + ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-61-generic root=UUID=877c5daf-9427-49e3-8656-437c3f30fc84 ro console=tty1 console=ttyS0 + ProcVersionSignature: User Name 3.13.0-61.100-generic 3.13.11-ckt22 + RelatedPackageVersions: + linux-restricted-modules-3.13.0-61-generic N/A + linux-backports-modules-3.13.0-61-generic N/A + linux-firmware N/A + RfKill: Error: [Errno 2] No such file or directory + Tags: trusty ec2-images + Uname: Linux 3.13.0-61-generic x86_64 + UpgradeStatus: No upgrade log present (probably fresh install) + UserGroups: adm audio cdrom dialout dip floppy netdev plugdev sudo video + _MarkForUpload: True + dmi.bios.date: 05/06/2015 + dmi.bios.vendor: Xen + dmi.bios.version: 4.2.amazon + dmi.chassis.type: 1 + dmi.chassis.vendor: Xen + dmi.modalias: dmi:bvnXen:bvr4.2.amazon:bd05/06/2015:svnXen:pnHVMdomU:pvr4.2.amazon:cvnXen:ct1:cvr: + dmi.product.name: HVM domU + dmi.product.version: 4.2.amazon + dmi.sys.vendor: Xen ** Attachment added: "BootDmesg.txt" https://bugs.launchpad.net/bugs/1477171/+attachment/4443517/+files/BootDmesg.txt -- 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/1477171 Title: Enable intel_pstate by default on Trusty EC2 AMIs Status in linux package in Ubuntu: Confirmed Bug description: Please can the intel_pstate driver be enabled by default on the Ubuntu EC2 AMIs. On instances with support for C-states and P-States [1] there is a notable performance impact and lack of support for higher clock frequencies available due to the use of the acpi-cpufreq driver. For example on a c4.8xlarge the default frequency is limited to 2.9GHz when 3.2GHz is supported by the chip [2]. Some additional analysis is available here [3] and re-enabling it by default has been discussed [4] but this request is specifically for the EC2 AMIs. [1] http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/processor_state_control.html [2] http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/c4-instances.html [3] http://www.deplication.net/2015/07/c-states-and-p-states-with-ubuntu-1404.html [4] https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1188647 AMI: ami-47a23a30 (eu-west-1) $ lsb_release -d Description: Ubuntu 14.04.2 LTS $ uname -a Linux ip-172-31-8-218 3.13.0-57-generic #95-Ubuntu SMP Fri Jun 19 09:28:15 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux Default configuration (c4.8xl): $ sudo cpupower frequency-info analyzing CPU 0: driver: acpi-cpufreq CPUs which run at the same hardware frequency: 0 CPUs which need to have their frequency coordinated by software: 0 maximum transition latency: 10.0 us. hardware limits: 1.20 GHz - 2.90 GHz available frequency steps: 2.90 GHz, 2.90 GHz, 2.80 GHz, 2.70 GHz, 2.50 GHz, 2.40 GHz, 2.30 GHz, 2.20 GHz, 2.00 GHz, 1.90 GHz, 1.80 GHz, 1.70 GHz, 1.60 GHz, 1.40 GHz, 1.30 GHz, 1.20 GHz available cpufreq governors: conservative, ondemand, userspace, powersave, performance current policy: frequency should be within 1.20 GHz and 2.90 GHz. The governor "ondemand" may decide which speed to use within this range. current CPU frequency is 1.20 GHz (asserted by call to hardware). cpufreq stats: 2.90 GHz:70.40%, 2.90 GHz:0.00%, 2.80 GHz:0.00%, 2.70 GHz:0.00%, 2.50 GHz:0.00%, 2.40 GHz:0.00%, 2.30 GHz:0.00%, 2.20 GHz:0.00%, 2.00 GHz:0.00%, 1.90 GHz:0.00%, 1.80 GHz:0.00%, 1.70 GHz:0.00%, 1.60 GHz:0.09%, 1.40 GHz:0.00%, 1.30 GHz:0.00%, 1.20 GHz:29.51% (5) boost state support: Supported: yes Active: yes With intel_pstate enabled (c4.8xl): $ sudo cpupower frequency-info analyzing CPU 0: driver: intel_pstate CPUs which run at the same hardware frequency: 0 CPUs which need to have their frequency coordinated by software: 0 maximum transition latency: 0.97 ms. hardware limits: 1.20 GHz - 3.50 GHz available cpufreq governors: performance, powersave current policy: frequency should be within 1.20 GHz and 3.50 GHz. The governor "performance" may decide which speed to use within this range. current CPU frequency is 3.20 GHz (asserted by call to hardware). boost state support: Supported: yes Active: yes --- AlsaDevices: total 0 crw-rw---- 1 root audio 116, 1 Aug 12 17:19 seq crw-rw---- 1 root audio 116, 33 Aug 12 17:19 timer AplayDevices: Error: [Errno 2] No such file or directory ApportVersion: 2.14.1-0ubuntu3.11 Architecture: amd64 ArecordDevices: Error: [Errno 2] No such file or directory AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1: CRDA: Error: [Errno 2] No such file or directory CurrentDmesg: [39221.196411] init: plymouth-upstart-bridge main process ended, respawning DistroRelease: Ubuntu 14.04 Ec2AMI: ami-47a23a30 Ec2AMIManifest: (unknown) Ec2AvailabilityZone: eu-west-1b Ec2InstanceType: c4.8xlarge Ec2Kernel: unavailable Ec2Ramdisk: unavailable IwConfig: Error: [Errno 2] No such file or directory Lsusb: Error: command ['lsusb'] failed with exit code 1: unable to initialize libusb: -99 MachineType: Xen HVM domU Package: linux (not installed) PciMultimedia: ProcEnviron: TERM=xterm PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-61-generic root=UUID=877c5daf-9427-49e3-8656-437c3f30fc84 ro console=tty1 console=ttyS0 ProcVersionSignature: User Name 3.13.0-61.100-generic 3.13.11-ckt22 RelatedPackageVersions: linux-restricted-modules-3.13.0-61-generic N/A linux-backports-modules-3.13.0-61-generic N/A linux-firmware N/A RfKill: Error: [Errno 2] No such file or directory Tags: trusty ec2-images Uname: Linux 3.13.0-61-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm audio cdrom dialout dip floppy netdev plugdev sudo video _MarkForUpload: True dmi.bios.date: 05/06/2015 dmi.bios.vendor: Xen dmi.bios.version: 4.2.amazon dmi.chassis.type: 1 dmi.chassis.vendor: Xen dmi.modalias: dmi:bvnXen:bvr4.2.amazon:bd05/06/2015:svnXen:pnHVMdomU:pvr4.2.amazon:cvnXen:ct1:cvr: dmi.product.name: HVM domU dmi.product.version: 4.2.amazon dmi.sys.vendor: Xen To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1477171/+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
