apport information ** Tags added: apport-collected
** Description changed: On this system, I've run into two scenarios where the 4 cores are offlined and can't be brought back up. IN both cases, all but cpu0 appear to be taken offline, and the only way to restore them is to access the control system and power the system down and back up manually. Additionally, I've noticed that the power off/on sequence must be done twice before it's effective. First scenario (both from certification testing) is the cpu_offlining script. It attempts to offline cores 1 - N, skipping core 0. However, once it brings the cores down (with errors for each one) it is impossible to bring them back up, as writes to the file sys/devices/system/cpu/cpuN/online error out with messages about being unable to write to the file. For more details, see bug #1182637 Next, when running the cpu stress test. Ordinarily, the tool 'stress' is installe by checkbox and run like this: stress --cpu NUM_OF_CORES --vm (RAM/4) --timeout 7200 I discovered that even a small, quick run like this will kill the cores: stress --cpu 1 --vm 4 --timeout 7200. To demonstrate, here is the output of /proc/cpuinfo before and after the quick stress run I just described: ubuntu@c18:~$ cat /proc/cpuinfo processor : 0 model name : ARMv7 Processor rev 0 (v7l) BogoMIPS : 2183.63 Features : swp half thumb fastmult vfp edsp neon vfpv3 tls CPU implementer : 0x41 CPU architecture: 7 CPU variant : 0x3 CPU part : 0xc09 CPU revision : 0 processor : 1 model name : ARMv7 Processor rev 0 (v7l) BogoMIPS : 2191.03 Features : swp half thumb fastmult vfp edsp neon vfpv3 tls CPU implementer : 0x41 CPU architecture: 7 CPU variant : 0x3 CPU part : 0xc09 CPU revision : 0 processor : 2 model name : ARMv7 Processor rev 0 (v7l) BogoMIPS : 2191.03 Features : swp half thumb fastmult vfp edsp neon vfpv3 tls CPU implementer : 0x41 CPU architecture: 7 CPU variant : 0x3 CPU part : 0xc09 CPU revision : 0 processor : 3 model name : ARMv7 Processor rev 0 (v7l) BogoMIPS : 2191.03 Features : swp half thumb fastmult vfp edsp neon vfpv3 tls CPU implementer : 0x41 CPU architecture: 7 CPU variant : 0x3 CPU part : 0xc09 CPU revision : 0 Hardware : Highbank Revision : 0000 Serial : 0000000000000000 ubuntu@c18:~$ stress --cpu 1 --vm 4 --timeout 90 stress: info: [2612] dispatching hogs: 1 cpu, 0 io, 4 vm, 0 hdd stress: info: [2612] successful run completed in 91s ubuntu@c18:~$ cat /proc/cpuinfo processor : 0 model name : ARMv7 Processor rev 0 (v7l) BogoMIPS : 2183.63 Features : swp half thumb fastmult vfp edsp neon vfpv3 tls CPU implementer : 0x41 CPU architecture: 7 CPU variant : 0x3 CPU part : 0xc09 CPU revision : 0 Hardware : Highbank Revision : 0000 Serial : 0000000000000000 ubuntu@c18:~$ Also, note this from dmesg: [ 61.915519] init: bootchart post-stop process (1281) terminated with status 2 [ 180.674675] CPU1: shutdown [ 180.695118] CPU2: shutdown [ 180.722629] CPU3: shutdown [ 181.770108] CPU1: failed to come online [ 182.785723] CPU2: failed to come online [ 183.801385] CPU3: failed to come online Additionally, I want to say that the system offlined those cores without me doing anything at all on a previous attempt. But I have no proof of that. ProblemType: Bug DistroRelease: Ubuntu 13.04 Package: linux-image-3.8.0-22-generic 3.8.0-22.33 ProcVersionSignature: User Name 3.8.0-22.33-generic 3.8.11 Uname: Linux 3.8.0-22-generic armv7l AlsaDevices: total 0 crw-rw---T 1 root audio 116, 1 May 30 00:13 seq crw-rw---T 1 root audio 116, 33 May 30 00:13 timer AlsaVersion: Advanced Linux Sound Architecture Driver Version k3.8.0-22-generic. AplayDevices: Error: [Errno 2] No such file or directory: 'aplay' ApportVersion: 2.9.2-0ubuntu8 Architecture: armhf ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord' 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: 'iw' Date: Thu May 30 00:15:38 2013 HibernationDevice: RESUME=UUID=92423a77-1db5-4768-bbac-d0d80f3bdfbd IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig' Lsusb: Error: command ['lsusb'] failed with exit code 1: unable to initialize libusb: -99 MarkForUpload: True PciMultimedia: ProcEnviron: TERM=screen PATH=(custom, no user) LANG=C SHELL=/bin/bash ProcFB: ProcKernelCmdLine: console=ttyAMA0 nosplash RelatedPackageVersions: linux-restricted-modules-3.8.0-22-generic N/A linux-backports-modules-3.8.0-22-generic N/A linux-firmware 1.106 RfKill: Error: [Errno 2] No such file or directory: 'rfkill' SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) + --- + Architecture: armhf + DistroRelease: Ubuntu 13.04 + MarkForUpload: True + Package: linux (not installed) + ProcEnviron: + TERM=screen + PATH=(custom, no user) + LANG=C + SHELL=/bin/bash + Uname: Linux 3.8.0-22-generic armv7l + UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo ** Attachment added: "HookError_cloud_archive.txt" https://bugs.launchpad.net/bugs/1185669/+attachment/3706838/+files/HookError_cloud_archive.txt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1185669 Title: CPU cores offline and can't be brought back up on ARM Server card To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1185669/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
