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Thread: Only One Processor working?

  1. #11

    Default Re: Only One Processor working?

    Quote Originally Posted by wolfi323 View Post
    Not sure if that could possibly help in this case, but try to install kernel-firmware.
    This contains updated microcode for certain CPUs, but it isn't installed automatically in every case on 13.1 due to https://bugzilla.novell.com/show_bug.cgi?id=847158
    Oops, sorry. The microcode is in ucode-amd of course (which might not get installed automatically on 13.1. because of that bug), so check if you have that installed.
    This comes from the kernel-firmware src rpm as well, that's why I mixed them up.

    But again, I have no idea if that could help in this case.

  2. #12
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    Default Re: Only One Processor working?

    On 02/19/2014 06:06 AM, wolfi323 wrote:
    >
    > wolfi323;2625793 Wrote:
    >> Not sure if that could possibly help in this case, but try to install
    >> kernel-firmware.
    >> This contains updated microcode for certain CPUs, but it isn't installed
    >> automatically in every case on 13.1 due to
    >> https://bugzilla.novell.com/show_bug.cgi?id=847158

    >
    > Oops, sorry. The microcode is in ucode-amd of course (which might not
    > get installed automatically on 13.1. because of that bug), so check if
    > you have that installed.
    > This comes from the kernel-firmware src rpm as well, that's why I mixed
    > them up.
    >
    > But again, I have no idea if that could help in this case.


    Most of the processors that need firmware loaded at boot time are newer models.
    Do any of the Athlon models need such firmware? None of mine do.

    I'm not sure that missing firmware would make CPU #0 unavailable. I would expect
    #1 to be absent in that case.




  3. #13
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    Default Re: Only One Processor working?

    On Wed 19 Feb 2014 06:16:01 AM CST, SomeSuSEUser wrote:


    lwfinger;2625733 Wrote:
    > ....
    > Two quick ways to check the number of CPUs is to
    > 'cat /proc/interrupts', or
    > 'dmesg | grep smpboot'. If you truly have only one running, you need
    > to check
    > the output of dmesg to see why.
    > ....




    Code:
    --------------------
    JeepNut@linux-twnw:~> cat /proc/interrupts
    CPU0
    0: 120 XT-PIC-XT-PIC timer
    1: 2 XT-PIC-XT-PIC i8042
    2: 0 XT-PIC-XT-PIC cascade
    5: 17146 XT-PIC-XT-PIC ohci_hcd:usb2, sata_sil24,
    snd_hda_intel, snd_cmipci 6: 3 XT-PIC-XT-PIC floppy
    7: 5090 XT-PIC-XT-PIC ehci_hcd:usb1
    8: 0 XT-PIC-XT-PIC rtc0
    9: 0 XT-PIC-XT-PIC acpi
    10: 54644 XT-PIC-XT-PIC nouveau, firewire_ohci
    11: 58496 XT-PIC-XT-PIC sata_nv, sata_nv
    12: 4 XT-PIC-XT-PIC i8042
    14: 0 XT-PIC-XT-PIC pata_amd
    15: 0 XT-PIC-XT-PIC pata_amd
    21: 11435 PCI-MSI-edge enp2s0
    NMI: 158 Non-maskable interrupts
    LOC: 3877186 Local timer interrupts
    SPU: 0 Spurious interrupts
    PMI: 158 Performance monitoring interrupts
    IWI: 597918 IRQ work interrupts
    RTR: 0 APIC ICR read retries
    RES: 0 Rescheduling interrupts
    CAL: 0 Function call interrupts
    TLB: 0 TLB shootdowns
    TRM: 0 Thermal event interrupts
    THR: 0 Threshold APIC interrupts
    MCE: 0 Machine check exceptions
    MCP: 102 Machine check polls
    ERR: 1
    MIS: 0

    JeepNut@linux-twnw:~> dmesg | grep smpboot
    [ 0.000000] smpboot: Allowing 1 CPUs, 0 hotplug CPUs
    [ 0.017102] smpboot: weird, boot CPU (#0) not listed by the BIOS
    [ 0.017104] smpboot: SMP motherboard not detected
    [ 0.018000] smpboot: SMP disabled
    [ 0.025006] smpboot: Total of 1 processors activated (4822.15
    BogoMIPS) JeepNut@linux-twnw:~>

    --------------------


    So I've only got one CPU responding... => why?
    Could this be a "bad load" of some sort during installation?
    Would there be any reason to suspect a fresh download and
    reinstalling the OS might resolve?

    How do you prove that 1 core is "dead" in a CPU?
    ....or do CPUs even fail like that?

    Interesting messages from the code above...
    "boot CPU (#0) not listed by the BIOS"... is that a clue?
    SMP disabled.... is that a bad thing?

    .... what kind of tale do those outputs tell?
    Thanks!


    Hi
    I have a AMD Athlon(tm) 64 X2 Dual Core Processor 4400+ running here on
    a ASUS A8N-SLI Premium ACPI BIOS Revision 1303.

    But from your output it looks like there is an acpi issue since it
    isn't on. Haven't made any changes in the BIOS or maybe it was reset to
    defaults?

    --
    Cheers Malcolm °¿° SUSE Knowledge Partner (Linux Counter #276890)
    openSUSE 13.1 (Bottle) (x86_64) GNOME 3.10.2 Kernel 3.11.10-7-desktop
    If you find this post helpful and are logged into the web interface,
    please show your appreciation and click on the star below... Thanks!


  4. #14

    Default Re: Only One Processor working?

    Quote Originally Posted by lwfinger View Post
    Most of the processors that need firmware loaded at boot time are newer models.
    Do any of the Athlon models need such firmware? None of mine do.
    As I said, I don't know.
    Mine doesn't either (Athlon 64 3000+, but that's single core anyway).

    But I remembered that bug report and the 13.1 update, so I thought I should mention that. Although the bug report doesn't mention anything about a core not being recognized.
    Last edited by wolfi323; 19-Feb-2014 at 12:41.

  5. #15

    Default Re: Only One Processor working? <SOLVED>

    Quote Originally Posted by lwfinger View Post

    <snip>
    What you can do, however, is boot the installation media. In fact, the 12.2
    media would be best. If it is the Live ISO, then open a terminal and run the
    above tests. For the NET and DVD ISOs, boot into rescue mode and do the same.
    Does this show SMP? If 12.2 is still OK, then try the 13.1 media. It is always
    possible that a kernel bug has been introduced that keeps only your
    configuration from working with multiple CPUs. Unlikely, but possible.

    If none of these steps show both CPUs, then enter the BIOS and reset to factory
    defaults. You will need to reset the time, any boot medium settings, and
    anything else that you know has been changed. Did that help?

    The final thing would be to try to reload or update the BIOS. Of course, that is
    always a risky step that may brick the motherboard if it fails.

    And there it is.
    Got the same results with a 12.2 KDE LIVE CD and a 13.1 KDE Live disc as well as the 13.1 installation disc "rescue" boot option.
    So I went through the BIOS again and I could not find anything that said to me "limit yourself to one core".
    But returning the BIOS to system defaults did the trick.
    Booted back up into 13.1 from /sda1 and viola! 2 cores showing up in System Monitor.

    Thanks for the push. I obviously need to understand my BIOS better... If I hit upon the errant setting, will share.

    @wolfi:
    Wanted to confirm that I did install kernel firmware tools early in the process of troubleshooting. It didn't seem to help anything but didn't hurt either.
    You also however mentioned seeing my kernel boot options:

    Code:
    BOOT_IMAGE=/boot/vmlinuz-3.11.10-7-desktop root=UUID=73afb39b-0903-40d5-b0ff-dfb4fbaaaf75 resume=/dev/disk/by-id/ata-WDC_WD2500HHTZ-60N21V0_WD-WXB1E62TEY98-part2 splash=silent quiet showopts
    Anything remarkable there? I'm not sure what half of that means.


    @malcomlewis:

    But from your output it looks like there is an acpi issue since it isn't on.
    Yeah I normally turn all that stuff off. But it's an interesting thing to note and keep in the back of my mind.

    As I mentioned, I will tag the thread again if I find out what setting in BIOS was locking out one of the cores to the OS.

    THANKS EVERYONE for your kind assistance chasing that down.
    Gigabyte 990FXA-UD5 R5 / AMD FX-8350 FX 8Core Black Edition
    Corsair HydroH110i GT / G.SKILL Ripjaws Z 16GB DDR3-1866
    Linux 4.4.179-99-default x86_64 / openSUSE 42.3 (x86_64) / KDE PLASMA 5.8.7 / KDE Frameworks 5.32.0

  6. #16

    Default Re: Only One Processor working? <SOLVED>

    Quote Originally Posted by SomeSuSEUser View Post
    @wolfi:
    Wanted to confirm that I did install kernel firmware tools early in the process of troubleshooting. It didn't seem to help anything but didn't hurt either.
    You also however mentioned seeing my kernel boot options:

    Code:
    BOOT_IMAGE=/boot/vmlinuz-3.11.10-7-desktop root=UUID=73afb39b-0903-40d5-b0ff-dfb4fbaaaf75 resume=/dev/disk/by-id/ata-WDC_WD2500HHTZ-60N21V0_WD-WXB1E62TEY98-part2 splash=silent quiet showopts
    Anything remarkable there? I'm not sure what half of that means.
    No, that's pretty standard.
    To explain:
    root= specifies the root partition to use, resume= tells from which partition to try to resume after hibernation (should be the swap partition normally), splash=silent and quiet turn off all text messages during boot and show the splash screen instead.
    And grub1 only shows options after the showopts on its kernel command line, so it is there that the standard options are _not_ shown. (I think this has no effect for grub2 though)

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