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dual core cpu

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mjos
Super Advisor

dual core cpu

Hi,
Can somebody please help in identifying whether the sever is dual core or if it has really 16 CPU's as listed below

model
ia64 hp server rx8640

ioscan -fnCprocessor
Class I H/W Path Driver S/W State H/W Type Description
===================================================================
processor 0 0/120 processor CLAIMED PROCESSOR Processor
processor 1 0/121 processor CLAIMED PROCESSOR Processor
processor 2 0/122 processor CLAIMED PROCESSOR Processor
processor 3 0/123 processor CLAIMED PROCESSOR Processor
processor 4 0/124 processor CLAIMED PROCESSOR Processor
processor 5 0/125 processor CLAIMED PROCESSOR Processor
processor 6 0/126 processor CLAIMED PROCESSOR Processor
processor 7 0/127 processor CLAIMED PROCESSOR Processor
processor 8 1/120 processor CLAIMED PROCESSOR Processor
processor 9 1/121 processor CLAIMED PROCESSOR Processor
processor 10 1/122 processor CLAIMED PROCESSOR Processor
processor 11 1/123 processor CLAIMED PROCESSOR Processor
processor 12 1/124 processor CLAIMED PROCESSOR Processor
processor 13 1/125 processor CLAIMED PROCESSOR Processor
processor 14 1/126 processor CLAIMED PROCESSOR Processor
processor 15 1/127 processor CLAIMED PROCESSOR Processor

TOP shows me 16 CPU's

Cpu states:
CPU LOAD USER NICE SYS IDLE BLOCK SWAIT INTR SSYS
0 0.79 0.0% 0.0% 1.0% 99.0% 0.0% 0.0% 0.0% 0.0%
1 0.41 0.0% 0.0% 0.0% 100.0% 0.0% 0.0% 0.0% 0.0%
2 0.66 0.0% 0.0% 0.0% 100.0% 0.0% 0.0% 0.0% 0.0%
3 0.74 96.1% 0.0% 3.9% 0.0% 0.0% 0.0% 0.0% 0.0%
4 0.45 0.0% 0.0% 0.0% 100.0% 0.0% 0.0% 0.0% 0.0%
5 0.64 100.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0%
6 0.56 100.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0%
7 0.47 87.3% 0.0% 6.9% 5.9% 0.0% 0.0% 0.0% 0.0%
8 0.06 0.0% 0.0% 0.0% 100.0% 0.0% 0.0% 0.0% 0.0%
9 0.05 0.0% 0.0% 28.7% 71.3% 0.0% 0.0% 0.0% 0.0%
10 0.07 1.0% 0.0% 2.0% 97.0% 0.0% 0.0% 0.0% 0.0%
11 0.05 0.0% 0.0% 1.0% 99.0% 0.0% 0.0% 0.0% 0.0%
12 0.09 0.0% 0.0% 0.0% 100.0% 0.0% 0.0% 0.0% 0.0%
13 0.03 0.0% 0.0% 0.0% 100.0% 0.0% 0.0% 0.0% 0.0%
14 0.04 0.0% 0.0% 0.0% 100.0% 0.0% 0.0% 0.0% 0.0%
15 0.08 0.0% 0.0% 0.0% 100.0% 0.0% 0.0% 0.0% 0.0%

nh1d0t04#machinfo -v
CPU info:
Number of CPUs = 16
Clock speed = 1418 MHz
Bus speed = 533 MT/s
CPUID registers
vendor information = "GenuineIntel"
processor serial number = 0x0000000000000000
processor version info = 0x0000000020000704
architecture revision: 0
processor family: 32 Intel(R) Itanium 2 9000 series
processor model: 0 Intel(R) Itanium 2 9000 series
processor revision: 7 Stepping C2
largest CPUID reg: 4
processor capabilities = 0x0000000000000005
implements long branch: 1
implements 16-byte atomic operations: 1
Bus features
implemented = 0xbdf0000020000000
selected = 0x0020000000000000
Exclusive Bus Cache Line Replacement Enabled

From the above outputs I am not able to decide whether the server has infact 16 CPU's or it is 8 dual core CPU's
30 REPLIES
Dennis Handly
Acclaimed Contributor

Re: dual core cpu

>I am not able to decide whether the server has in fact 16 CPUs or it is 8 dual core CPUs

There is no real difference. You have 16 cores. Itanium 2 9000 series is dual core.
Jan Zalman
Advisor

Re: dual core cpu

Sharma Sanjeev
Respected Contributor

Re: dual core cpu

Hi

System is having Dual Core CPU's
Everything is Possible as " IMPOSSIBLE" word itself says I M POSSIBLE
Oviwan
Honored Contributor

Re: dual core cpu

on 11.31 you can enable hyperthreading by setting the kernelparameter lcpu_attr to 1.
hence if you have enabled this and the top shows you 8 CPU you have for example only 4 cpu's...
mjos
Super Advisor

Re: dual core cpu

I am not able to find any kernel parameter by the name of cpu_attr

kctune |grep -i cpu_attr

Is there any command to find out whether it is 8 dual core CPU's
Oviwan
Honored Contributor

Re: dual core cpu

you have 8 dual core cpu's

lcpu_attr is only since HPUX 11.31 available... check with "uname -a" for your hpux version
Jan Zalman
Advisor

Re: dual core cpu

Look at the link above.

machinfo | awk '/processor family:/{print $3}'

31 ... single core IA
32 ... dual core IA

Time and loyalty cannot be bought.
Sharma Sanjeev
Respected Contributor

Re: dual core cpu

Hi

run SAM > Performance Monitor > System Properties
Everything is Possible as " IMPOSSIBLE" word itself says I M POSSIBLE
mjos
Super Advisor

Re: dual core cpu

Thanks, the os versions is 11.23 & model is ia64 hp server rx8640.
How did you decide that it is 8 core dual cpu's
mjos
Super Advisor

Re: dual core cpu

SAM output

Processors: â â â
â â â â Active: 16 â â â
â â â â Total: 16 â â â
â â â â Clock Frequency: 400 MHz â â â
â â â â Machine Identification: 4130796792 â â â
â â â â Hardware Model: ia64 hp server rx8640 â â â â
â â â â Kernel Width Support: 64 â â â â
â â â â CPU Version: Intel(R) Itanium(TM) Family Processor â â â â
â â â â CPU Model No: 0 â â â â
â â â â CPU Revision: 7

Does 16 processors mean 16 CPU's
Oviwan
Honored Contributor

Re: dual core cpu

Dennis Handly
Acclaimed Contributor

Re: dual core cpu

>How did you decide that it is 8 core dual CPUs?

google pointed to Intel's web page for:
Itanium 9000 series
Sharma Sanjeev
Respected Contributor

Re: dual core cpu

Hi

If you will look H/W path of ioscan output

FOR DUAL CORE CPU

processor 0 0/120 processor CLAIMED PROCESSOR Processor
processor 1 0/121 processor CLAIMED PROCESSOR Processor
processor 2 0/122 processor CLAIMED PROCESSOR Processor
processor 3 0/123 processor CLAIMED PROCESSOR Processor

H/W path will be 0/120 than 0/121

AND FOR SINGLE CORE it will be diffrent like

processor 0 37 processor CLAIMED PROCESSOR Processor
processor 1 45 processor CLAIMED PROCESSOR Processor

2. 8700 is Single Core and 8800 Is dual Core

Regards
Sanjeev


Everything is Possible as " IMPOSSIBLE" word itself says I M POSSIBLE
Sharma Sanjeev
Respected Contributor

Re: dual core cpu

SORRY fOR TYPO ITS 8900 NOT 8800
Everything is Possible as " IMPOSSIBLE" word itself says I M POSSIBLE
Deepak Kr
Respected Contributor

Re: dual core cpu

Hi mjos,

Itanium 2 is a dual core CPU.

So you should have 8 Dual Core CPUs

Another best way to double check is to check hardware specs you used to buy servers.
"There is always some scope for improvement"
Dennis Handly
Acclaimed Contributor

Re: dual core cpu

>Deepakitpro: Itanium 2 is a dual core CPU.

Intel has retconned Itanium 2 away. It is all Itanium now.
Note not all Itanium (2) are dual core, only series 9000 and 9100 are.
Torsten.
Acclaimed Contributor
Solution

Re: dual core cpu

processor family: 32 Intel(R) Itanium 2 9000 series

The
Intel(R) Itanium 2 9000 series aka Montecito
Intel(R) Itanium 2 9100 series aka Montevale


Montecito and Montevale are both dual core CPUs - allways!

The "smallest" server like rx2660 can have even a dual core with 1 core disabled, but anyway - it reamins a dual core.



BTW, in SAM you see 400MHz.

This may be OK if this is a HPVM - if not, you need patches to see 1.6GHz!

Hope this helps!
Regards
Torsten.

__________________________________________________
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those who understand binary, and those who don't.

__________________________________________________
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If you feel this was helpful please click the KUDOS! thumb below!   
mjos
Super Advisor

Re: dual core cpu

All, thanks for your answers. But my basic question still remains unanswered.
I know itanium servers are dual core
What I want to know is that whetere there are 8 dual core CPU's or 16 physcial CPU's.
What is the command that will show us the exact no of CPU's & if it is dual core CPU's then how do we find it out.
One another server top is showing as 54 CPU's. Does that mean this server as 27 dual core CPU's?
Sharma Sanjeev
Respected Contributor

Re: dual core cpu

Hi mjos

I have given you simple method to identify

If you will look H/W path of ioscan output

FOR DUAL CORE CPU

processor 0 0/120 processor CLAIMED PROCESSOR Processor
processor 1 0/121 processor CLAIMED PROCESSOR Processor
processor 2 0/122 processor CLAIMED PROCESSOR Processor
processor 3 0/123 processor CLAIMED PROCESSOR Processor

H/W path will be 0/120 than 0/121

AND FOR SINGLE CORE it will be diffrent like

processor 0 37 processor CLAIMED PROCESSOR Processor
processor 1 45 processor CLAIMED PROCESSOR Processor


Regards
Sanjeev
Everything is Possible as " IMPOSSIBLE" word itself says I M POSSIBLE
mjos
Super Advisor

Re: dual core cpu

Cpu states:
CPU LOAD USER NICE SYS IDLE BLOCK SWAIT INTR SSYS
0 0.01 0.4% 0.0% 0.0% 99.6% 0.0% 0.0% 0.0% 0.0%
1 0.02 0.0% 0.0% 2.9% 97.1% 0.0% 0.0% 0.0% 0.0%
2 0.01 0.0% 0.0% 0.2% 99.8% 0.0% 0.0% 0.0% 0.0%
3 0.01 0.2% 0.0% 0.0% 99.8% 0.0% 0.0% 0.0% 0.0%
4 0.02 0.0% 0.0% 0.8% 99.2% 0.0% 0.0% 0.0% 0.0%
5 0.03 2.1% 0.0% 2.7% 95.2% 0.0% 0.0% 0.0% 0.0%
6 0.01 0.0% 0.0% 0.2% 99.8% 0.0% 0.0% 0.0% 0.0%
7 0.01 0.2% 0.0% 0.0% 99.8% 0.0% 0.0% 0.0% 0.0%
16 0.02 0.2% 0.0% 0.0% 99.8% 0.0% 0.0% 0.0% 0.0%
17 0.25 0.8% 0.0% 0.0% 99.2% 0.0% 0.0% 0.0% 0.0%
18 0.08 0.0% 0.0% 3.3% 96.7% 0.0% 0.0% 0.0% 0.0%
19 0.01 0.2% 0.0% 0.2% 99.6% 0.0% 0.0% 0.0% 0.0%
20 0.03 0.4% 0.0% 0.2% 99.4% 0.0% 0.0% 0.0% 0.0%
21 0.06 1.4% 0.0% 3.3% 95.4% 0.0% 0.0% 0.0% 0.0%
22 0.15 70.0% 0.0% 13.2% 16.8% 0.0% 0.0% 0.0% 0.0%
23 0.19 0.0% 0.0% 0.0% 100.0% 0.0% 0.0% 0.0% 0.0%
32 0.05 0.0% 0.0% 0.2% 99.8% 0.0% 0.0% 0.0% 0.0%
33 0.01 1.5% 0.0% 3.7% 94.8% 0.0% 0.0% 0.0% 0.0%
34 0.02 1.4% 0.0% 3.3% 95.4% 0.0% 0.0% 0.0% 0.0%
35 0.01 0.2% 0.0% 0.0% 99.8% 0.0% 0.0% 0.0% 0.0%
36 0.02 0.0% 0.0% 0.0% 100.0% 0.0% 0.0% 0.0% 0.0%
37 0.13 0.0% 0.0% 0.4% 99.6% 0.0% 0.0% 0.0% 0.0%
38 0.09 0.0% 0.0% 0.0% 100.0% 0.0% 0.0% 0.0% 0.0%
39 0.02 0.0% 0.0% 0.0% 100.0% 0.0% 0.0% 0.0% 0.0%
48 0.00 0.0% 0.0% 0.0% 100.0% 0.0% 0.0% 0.0% 0.0%
49 0.00 0.0% 0.0% 0.0% 100.0% 0.0% 0.0% 0.0% 0.0%
50 0.02 0.0% 0.0% 0.0% 100.0% 0.0% 0.0% 0.0% 0.0%
51 0.00 0.0% 0.0% 0.0% 100.0% 0.0% 0.0% 0.0% 0.0%
52 0.01 0.0% 0.0% 2.7% 97.3% 0.0% 0.0% 0.0% 0.0%
53 0.01 0.0% 0.0% 0.0% 100.0% 0.0% 0.0% 0.0% 0.0%
54 0.02 0.0% 0.0% 0.0% 100.0% 0.0% 0.0% 0.0% 0.0%
55 0.65 68.1% 0.0% 13.9% 18.0% 0.0% 0.0% 0.0% 0.0%
--- ---- ----- ----- ----- ----- ----- ----- ----- -----
avg 0.06 4.6% 0.0% 1.5% 93.8% 0.0% 0.0% 0.0% 0.0%


#ioscan -fnCprocessor
Class I H/W Path Driver S/W State H/W Type Description
========================================================================
processor 0 0/120 processor CLAIMED PROCESSOR Processor
processor 1 0/121 processor CLAIMED PROCESSOR Processor
processor 2 0/122 processor CLAIMED PROCESSOR Processor
processor 3 0/123 processor CLAIMED PROCESSOR Processor
processor 4 0/124 processor CLAIMED PROCESSOR Processor
processor 5 0/125 processor CLAIMED PROCESSOR Processor
processor 6 0/126 processor CLAIMED PROCESSOR Processor
processor 7 0/127 processor CLAIMED PROCESSOR Processor
processor 8 1/120 processor CLAIMED PROCESSOR Processor
processor 9 1/121 processor CLAIMED PROCESSOR Processor
processor 10 1/122 processor CLAIMED PROCESSOR Processor
processor 11 1/123 processor CLAIMED PROCESSOR Processor
processor 12 1/124 processor CLAIMED PROCESSOR Processor
processor 13 1/125 processor CLAIMED PROCESSOR Processor
processor 14 1/126 processor CLAIMED PROCESSOR Processor
processor 15 1/127 processor CLAIMED PROCESSOR Processor
processor 16 2/120 processor CLAIMED PROCESSOR Processor
processor 17 2/121 processor CLAIMED PROCESSOR Processor
processor 18 2/122 processor CLAIMED PROCESSOR Processor
processor 19 2/123 processor CLAIMED PROCESSOR Processor
processor 20 2/124 processor CLAIMED PROCESSOR Processor
processor 21 2/125 processor CLAIMED PROCESSOR Processor
processor 22 2/126 processor CLAIMED PROCESSOR Processor
processor 23 2/127 processor CLAIMED PROCESSOR Processor
processor 24 3/120 processor CLAIMED PROCESSOR Processor
processor 25 3/121 processor CLAIMED PROCESSOR Processor
processor 26 3/122 processor CLAIMED PROCESSOR Processor
processor 27 3/123 processor CLAIMED PROCESSOR Processor
processor 28 3/124 processor CLAIMED PROCESSOR Processor
processor 29 3/125 processor CLAIMED PROCESSOR Processor
processor 30 3/126 processor CLAIMED PROCESSOR Processor
processor 31 3/127 processor CLAIMED PROCESSOR Processor

The above output shows me 56 CPU's in top command, but when i do ioscan it shows be 32 processors. So from ioscan it should be 16 dual core CPU's but why does TOP show me 56 CPUs
Don Morris_1
Honored Contributor

Re: dual core cpu

Because it doesn't. Note that cpus 8 to 15 are not in the top output (nor are 24 to 31, 40 to 47). So that's around 24 which aren't present... and 32 that are.

My expectation is that 56 to 63 are also "missing". And these are missing because your cpus are likely both dual core and HyperThreading capable. The system reserved indices for "sibling" processors which are the HT execution contexts within each core. (Hence your 16 sockets have 32 cores which could be 64 total "cpus" to the OS with everything on).

CPU index is not a good estimate of total cpu counts on modern systems (Cell OL* can yield big gaps too....).
mjos
Super Advisor

Re: dual core cpu

Thanks, I have submitted points to everybody.

When I enabled the kernel parameter lcpu_attr value=1, i could see a total of 64 CPU's in the top command.
Does that mean the server has 32 dual core CPU's currently installed?
Patrick Wallek
Honored Contributor

Re: dual core cpu

No.

# man lcpu_attr
LCPU_ATTR:
DESCRIPTION
This tunable dynamically enables (1) or disables (0) the logical processor (LCPU) attribute in the default processor set. On systems supporting hyper-threading technology, each hyper-thread is represented as an LCPU.
When the LCPU attribute is enabled, the processor cores in the default processor have hyper-threading enabled. If the LCPU attribute is disabled, the physical processors in the default processor set behave as single threaded processor cores.


Torsten.
Acclaimed Contributor

Re: dual core cpu

Well, the answer is given by "machinfo" command:

# /usr/contrib/bin/machinfo
CPU info:
64 Intel(R) Itanium 2 9000 series processors (1.6 GHz, 18 MB)
533 MT/s bus, CPU version C2
128 logical processors (2 per socket)

Memory: 981492 MB (958.5 GB)

Firmware info:
Firmware revision: 7.44
FP SWA driver revision: 1.18
IPMI is supported on this system.
BMC firmware revision: 24.04

Platform info:
Model: "ia64 hp superdome server SD64B"
Machine ID number: abcdef-ghij-klmn-opqr-1234567890
Machine serial number: DEH123456

OS info:
Nodename: server1
Release: HP-UX B.11.31
Version: U (unlimited-user license)
Machine: ia64
ID Number: 12345678
vmunix _release_version:
@(#) $Revision: vmunix: B.11.31_LR FLAVOR=perf


In this output you see 64 CPU modules - 128 logical processors (2 per socket)
- this means dual core.

In addition you see the Intel Itanium 9000 series CPU - this means also dual core.

Hope this helps!
Regards
Torsten.

__________________________________________________
There are only 10 types of people in the world -
those who understand binary, and those who don't.

__________________________________________________
No support by private messages. Please ask the forum!

If you feel this was helpful please click the KUDOS! thumb below!