RHEL AS 4 U8 can't see more than 8CPUs

kasaj · ‎05-20-2014

Hello,

Don't know if the right place to put this.

I have a Red Hat Enterprise Linux AS realease 4 (Nahant Update 😎 that I virtualized using VMware Converter, to ESXi 5.1

The RHEL will not recognize more than 8 CPUs, no matter how I configure the VM settings.

Any limits on the RHEL version I have? Or am I missing something?

Thank you.

macvirtual · ‎05-21-2014

Hi kasj,

It seems it's not problem of VMware thing. I guess it may be RHEL issue.

http://www.redhat.com/resourcelibrary/articles/articles-red-hat-enterprise-linux-6-technology-capabi...

Check this article.

Best,

MAC

kasaj · ‎05-21-2014

Thank you for the reply.

It seems, according to that matrix, that version 4 supports 64 logical CPUs, So RHEL shouldn't be the problem.

BR

macvirtual · ‎05-21-2014

Hi

Yes, I also think it should.

So...is this article worth for you? This tells that there is a parameter that restrict maximum cores per socket.

VMware KB: Setting the number of cores per CPU in a virtual machine

Best,

MAC

kasaj · ‎05-21-2014

No Mac,

That's telling a way to specify cores per socket in ESX 4.x, in that version there was no drop down for cores per socket.

I have already tried every combination possible of virtual sockets and cores per socket. Still no result.

Thanks

MKguy · ‎05-21-2014

How many physical and logical threads does your physical host have?

Please paste your /proc/cpuinfo of the VM.

It might be that RHEL4 has problems with NUMA, as the ESXi host presents a vNUMA environment to the guest once you exceed 8 vCPUs. Check if your guest OS sees a NUMA architecture in both cases:

http://www.vxpertise.net/2012/06/summarizing-numa-scheduling/

https://access.redhat.com/site/solutions/48756

http://linux.die.net/man/8/numactl

There should be a parameter to disable vNUMA, or you can just enable CPU hot-add, which will automatically disable vNUMA:

http://kb.vmware.com/kb/2040375

-- http://alpacapowered.wordpress.com

vlho · ‎05-21-2014

Hi Kasaj

maybe your virtual have hardware version 7 where maximum number of vCPU is 8.

Try upgrade on higher version.

kasaj · ‎05-21-2014

Hi, below info requested

cat /proc/cpuinfo

processor : 0

vendor_id : GenuineIntel

cpu family : 6

model : 45

model name : Intel(R) Xeon(R) CPU E5-2670 0 @ 2.60GHz

stepping : 7

cpu MHz : 2593.733

cache size : 20480 KB

physical id : 0

siblings : 4

core id : 0

cpu cores : 4

fpu : yes

fpu_exception : yes

cpuid level : 13

wp : yes

flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts mmx fxsr sse sse2 ss ht syscall nx rdtscp lm pni cx16 popcnt lahf_lm

bogomips : 5191.57

clflush size : 64

cache_alignment : 64

address sizes : 40 bits physical, 48 bits virtual

power management:

processor : 1

vendor_id : GenuineIntel

cpu family : 6

model : 45

model name : Intel(R) Xeon(R) CPU E5-2670 0 @ 2.60GHz

stepping : 7

cpu MHz : 2593.733

cache size : 20480 KB

physical id : 0

siblings : 4

core id : 1

cpu cores : 4

fpu : yes

fpu_exception : yes

cpuid level : 13

wp : yes

flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts mmx fxsr sse sse2 ss ht syscall nx rdtscp lm pni cx16 popcnt lahf_lm

bogomips : 5185.54

clflush size : 64

cache_alignment : 64

address sizes : 40 bits physical, 48 bits virtual

power management:

processor : 2

vendor_id : GenuineIntel

cpu family : 6

model : 45

model name : Intel(R) Xeon(R) CPU E5-2670 0 @ 2.60GHz

stepping : 7

cpu MHz : 2593.733

cache size : 20480 KB

physical id : 0

siblings : 4

core id : 2

cpu cores : 4

fpu : yes

fpu_exception : yes

cpuid level : 13

wp : yes

flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts mmx fxsr sse sse2 ss ht syscall nx rdtscp lm pni cx16 popcnt lahf_lm

bogomips : 5188.35

clflush size : 64

cache_alignment : 64

address sizes : 40 bits physical, 48 bits virtual

power management:

processor : 3

vendor_id : GenuineIntel

cpu family : 6

model : 45

model name : Intel(R) Xeon(R) CPU E5-2670 0 @ 2.60GHz

stepping : 7

cpu MHz : 2593.733

cache size : 20480 KB

physical id : 0

siblings : 4

core id : 3

cpu cores : 4

fpu : yes

fpu_exception : yes

cpuid level : 13

wp : yes

flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts mmx fxsr sse sse2 ss ht syscall nx rdtscp lm pni cx16 popcnt lahf_lm

bogomips : 5187.55

clflush size : 64

cache_alignment : 64

address sizes : 40 bits physical, 48 bits virtual

power management:

processor : 4

vendor_id : GenuineIntel

cpu family : 6

model : 45

model name : Intel(R) Xeon(R) CPU E5-2670 0 @ 2.60GHz

stepping : 7

cpu MHz : 2593.733

cache size : 20480 KB

physical id : 1

siblings : 4

core id : 4

cpu cores : 4

fpu : yes

fpu_exception : yes

cpuid level : 13

wp : yes

flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts mmx fxsr sse sse2 ss ht syscall nx rdtscp lm pni cx16 popcnt lahf_lm

bogomips : 5187.54

clflush size : 64

cache_alignment : 64

address sizes : 40 bits physical, 48 bits virtual

power management:

processor : 5

vendor_id : GenuineIntel

cpu family : 6

model : 45

model name : Intel(R) Xeon(R) CPU E5-2670 0 @ 2.60GHz

stepping : 7

cpu MHz : 2593.733

cache size : 20480 KB

physical id : 1

siblings : 4

core id : 5

cpu cores : 4

fpu : yes

fpu_exception : yes

cpuid level : 13

wp : yes

flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts mmx fxsr sse sse2 ss ht syscall nx rdtscp lm pni cx16 popcnt lahf_lm

bogomips : 5187.65

clflush size : 64

cache_alignment : 64

address sizes : 40 bits physical, 48 bits virtual

power management:

processor : 6

vendor_id : GenuineIntel

cpu family : 6

model : 45

model name : Intel(R) Xeon(R) CPU E5-2670 0 @ 2.60GHz

stepping : 7

cpu MHz : 2593.733

cache size : 20480 KB

physical id : 1

siblings : 4

core id : 6

cpu cores : 4

fpu : yes

fpu_exception : yes

cpuid level : 13

wp : yes

flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts mmx fxsr sse sse2 ss ht syscall nx rdtscp lm pni cx16 popcnt lahf_lm

bogomips : 5187.56

clflush size : 64

cache_alignment : 64

address sizes : 40 bits physical, 48 bits virtual

power management:

processor : 7

vendor_id : GenuineIntel

cpu family : 6

model : 45

model name : Intel(R) Xeon(R) CPU E5-2670 0 @ 2.60GHz

stepping : 7

cpu MHz : 2593.733

cache size : 20480 KB

physical id : 1

siblings : 4

core id : 7

cpu cores : 4

fpu : yes

fpu_exception : yes

cpuid level : 13

wp : yes

flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts mmx fxsr sse sse2 ss ht syscall nx rdtscp lm pni cx16 popcnt lahf_lm

bogomips : 5187.58

clflush size : 64

cache_alignment : 64

address sizes : 40 bits physical, 48 bits virtual

power management:

numactl --hardware

available: 1 nodes (0-0)

node 0 size: 92159 MB

node 0 free: 88060 MB

cat /proc/cpuinfo | grep "physical id"

physical id : 0

physical id : 1

grep -i numa /var/log/dmesg

No NUMA configuration found

thanks

kasaj · ‎05-21-2014

Virtual Machine version is vmx-09

thanks

All

RHEL AS 4 U8 can't see more than 8CPUs