[Date Prev][Date Next]   [Thread Prev][Thread Next]   [Thread Index] [Date Index] [Author Index]

Re: [libvirt] virGetNodeinfo .cpus



Zvi Dubitzky schrieb:
virNodeGetInfo() returns .cpus as 2 but the /proc/cpuinfo of the node shows 2 processors with 2 cores each ('cpu cores') . Or maybe the 'core id' is what counts in the /proc/cpuinfo and that one gets vaue 0 , 1 only i.e totally 2
can you clarify  ?

Here is the output of /proc/cpuinfo:

processor       : 0
vendor_id       : AuthenticAMD
cpu family      : 15
model           : 65
model name      : Dual-Core AMD Opteron(tm) Processor 2210 HE
stepping        : 2
cpu MHz         : 1800.034
cache size      : 1024 KB
physical id     : 0
siblings        : 2
core id         : 0
cpu cores       : 2
apicid          : 0
initial apicid  : 0
fdiv_bug        : no
hlt_bug         : no
f00f_bug        : no
coma_bug        : no
fpu             : yes
fpu_exception   : yes
cpuid level     : 1
wp              : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt rdtscp lm 3dnowext 3dnow pni cx16 lahf_lm cmp_legacy svm extapic cr8_legacy
bogomips        : 3600.06
clflush size    : 64
power management: ts fid vid ttp tm stc

processor       : 1
vendor_id       : AuthenticAMD
cpu family      : 15
model           : 65
model name      : Dual-Core AMD Opteron(tm) Processor 2210 HE
stepping        : 2
cpu MHz         : 1800.034
cache size      : 1024 KB
physical id     : 0
siblings        : 2
core id         : 1
cpu cores       : 2
apicid          : 1
initial apicid  : 1
fdiv_bug        : no
hlt_bug         : no
f00f_bug        : no
coma_bug        : no
fpu             : yes
fpu_exception   : yes
cpuid level     : 1
wp              : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt rdtscp lm 3dnowext 3dnow pni cx16 lahf_lm cmp_legacy svm extapic cr8_legacy
bogomips        : 3600.23
clflush size    : 64
power management: ts fid vid ttp tm stc


Zvi Dubitzky Virtualization and System Architecture Email:dubi il ibm com
IBM Haifa Research Laboratory    Phone: +972-4-8296182
Haifa, 31905, ISRAEL

--
Libvir-list mailing list
Libvir-list redhat com
https://www.redhat.com/mailman/listinfo/libvir-list
An Opteron 2210 HE only has two cores. Yours is a single-CPU. Each core is on Processor, the core-count is of all cores bound together (i.e. in one socket), also called the siblings in /proc/cpuinfo

2x AMD Opteron 2344 => 8 processors, each entry with 4 cores and 4 siblings (2.6.18-92.1.22.el5) 1x Intel Xeon E5405 => 4 processors, each entry with 4 core and 4 sibling (2.6.18-53.el5) 2x Intel Xeon E5450 => 8 processors, each etnry with 4 cores and 4 siblings (2.6.18-53.el5) 1x Intel Core 2 Duo E6550 => 2 processors, each entry with 2 cores and 2 siblings (2.6.18-128.el5) 1x Intel Core 2 Duo 6400 => 2 processors, each entry with 2 cores and 2 siblings (2.6.18-128.1.6.el5) 1x Intel Core 2 Duo T8300 => 2 processors, each entry with 2 cores and 2 siblings (2.6.18-128.el5)

Nothing unexpected here.
Anyways virNodeGetInfo().cpus returns the correct value in your case and in all mine tested too, it should be obtained iterating over the processor-ids as seen in /proc/cpuinfo. My sole xen-Host returns for his E5405 1 core and 1 sibling for each processor via /proc/cpuinfo.


[Date Prev][Date Next]   [Thread Prev][Thread Next]   [Thread Index] [Date Index] [Author Index]