xen can only detect one core of multiple cores cpu

xen can only detect one core of multiple cores cpu

[quizyjones]

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I'm using a  Intel E5-2603 v3 @ 1.60GHz CPU of 6 cores. However, the dom0 can only find one core. here are some information that may helps in analyzing. 
~$ uname -aLinux storage 3.13.0-24-generic #46-Ubuntu SMP Thu Apr 10 19:11:08 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux
~$ cat /proc/cpuinfoprocessor       : 0vendor_id       : GenuineIntelcpu family      : 6model           : 63model name      : Intel(R) Xeon(R) CPU E5-2603 v3 @ 1.60GHzstepping        : 2microcode       : 0x27cpu MHz         : 1600.035cache size      : 15360 KBphysical id     : 0siblings        : 1core id         : 0cpu cores       : 1apicid          : 0initial apicid  : 0fpu             : yesfpu_exception   : yescpuid level     : 15wp              : yesflags           : fpu de tsc msr pae mce cx8 apic sep mca cmov pat clflush acpi mmx fxsr sse sse2 ss ht syscall nx lm constant_tsc rep_good nopl nonstop_tsc eagerfpu pni pclmulqdq monitor est ssse3 fma cx16 sse4_1 sse4_2 movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand hypervisor lahf_lm abm arat epb xsaveopt pln pts dtherm fsgsbase bmi1 avx2 bmi2 ermsbogomips        : 3200.07clflush size    : 64cache_alignment : 64address sizes   : 46 bits physical, 48 bits virtualpower management:
The result of 'dmesg' is at http://paste.ubuntu.com/13544065/, 'xl dmesg' is at http://paste.ubuntu.com/13544201/There are errors related with ACPI, so I modified the /etc/default/grub and changed the GRUB_CMDLINE_LINUX_DEFAULT from null to "quiet splash acpi=force". After reboot, the ACPI errors of  'dmesg' disappears. But still exists for 'xl dmesg' and dom0 can only find one core. The new 'dmesg' and 'xl dmesg' result is at http://paste.ubuntu.com/13544610/ and http://paste.ubuntu.com/13544633/
I've also tried the solution at http://lists.xen.org/archives/html/xen-devel/2012-06/msg00087.html and add acpi_rsdp=0xbabfe000 , still fails.
Other informations:xentop - 00:51:08   Xen 4.4.11 domains: 1 running, 0 blocked, 0 paused, 0 crashed, 0 dying, 0 shutdownMem: 33451548k total, 8752508k used, 24699040k free    CPUs: 1 @ 1600MHz      NAME  STATE   CPU(sec) CPU(%)     MEM(k) MEM(%)  MAXMEM(k) MAXMEM(%) VCPUS NETS NETTX(k) NETRX(k) VBDS   VBD_OO   VBD_RD   VBD_WR  VBD_RSECT  VBD_WSECT SSID  Domain-0 -----r         47    0.0    8388608   25.1    8388608      25.1     1    0        0        0    0        0        0        0          0          0    2



















 		 	   		  

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Re: xen can only detect one core of multiple cores cpu

[Andrew Cooper]

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On 28/11/15 17:23, quizyjones wrote:
> I'm using a  Intel E5-2603 v3 @ 1.60GHz CPU of 6 cores. However, the
> dom0 can only find one core. here are some information that may helps
> in analyzing.

>From `xl dmesg`

(XEN) ACPI Error (tbxfroot-0218): A valid RSDP was not found [20070126]
...
(XEN) SMP motherboard not detected.

Xen cannot find any ACPI tables, and finds no secondary CPUs.  As a
knock-on effect, dom0 only gets one.

How is your BIOS configured?  Does booting Linux natively work?

~Andrew

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Re: xen can only detect one core of multiple cores cpu

[quizy_jones]

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Yes, booting ubuntu directly can see 6 cores. The dmesg results from native ubuntu: http://paste.ubuntu.com/13553870/
BIOS setting is http://snag.gy/v8XeJ.jpg  http://snag.gy/hSnDs.jpg  http://snag.gy/pQz7o.jpg http://snag.gy/6TdqJ.jpg
This is the grub.cfg http://paste.ubuntu.com/13553514/


quizy_jones@outlook.com
 
From: Andrew Cooper
Date: 2015-11-29 03:24
To: quizyjones; xen-devel@lists.xen.org
Subject: Re: [Xen-devel] xen can only detect one core of multiple cores cpu
On 28/11/15 17:23, quizyjones wrote:
I'm using a  Intel E5-2603 v3 @ 1.60GHz CPU of 6 cores. However, the dom0 can only find one core. here are some information that may helps in analyzing.

From `xl dmesg`

(XEN) ACPI Error (tbxfroot-0218): A valid RSDP was not found [20070126]
...
(XEN) SMP motherboard not detected.

Xen cannot find any ACPI tables, and finds no secondary CPUs.  As a knock-on effect, dom0 only gets one.

How is your BIOS configured?  Does booting Linux natively work?

~Andrew

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Re: xen can only detect one core of multiple cores cpu

[Jan Beulich]

>>> On 28.11.15 at 20:24, <andrew.cooper3@citrix.com> wrote:
> On 28/11/15 17:23, quizyjones wrote:
>> I'm using a  Intel E5-2603 v3 @ 1.60GHz CPU of 6 cores. However, the
>> dom0 can only find one core. here are some information that may helps
>> in analyzing.
> 
> From `xl dmesg`
> 
> (XEN) ACPI Error (tbxfroot-0218): A valid RSDP was not found [20070126]
> ...
> (XEN) SMP motherboard not detected.
> 
> Xen cannot find any ACPI tables, and finds no secondary CPUs.  As a
> knock-on effect, dom0 only gets one.
> 
> How is your BIOS configured?  Does booting Linux natively work?

Presumably this is set to UEFI mode, in which case booting via grub2
requires chainload to be used, or grub2 to be avoided.

Jan

Re: xen can only detect one core of multiple cores cpu

[quizy_jones]

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>>> On 28.11.15 at 20:24, <andrew.cooper3@citrix.com> wrote:
> On 28/11/15 17:23, quizyjones wrote:
>> I'm using a  Intel E5-2603 v3 @ 1.60GHz CPU of 6 cores. However, the
>> dom0 can only find one core. here are some information that may helps
>> in analyzing.
> 
> From `xl dmesg`
> 
> (XEN) ACPI Error (tbxfroot-0218): A valid RSDP was not found [20070126]
> ...
> (XEN) SMP motherboard not detected.
> 
> Xen cannot find any ACPI tables, and finds no secondary CPUs.  As a
> knock-on effect, dom0 only gets one.
> 
> How is your BIOS configured?  Does booting Linux natively work?

Presumably this is set to UEFI mode, in which case booting via grub2
requires chainload to be used, or grub2 to be avoided.

Jan


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