topic Re: dual core cpu in Operating System - HP-UX

dual core cpu

mjos — Mon, 28 Jul 2008 12:07:12 GMT

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

Re: dual core cpu

Dennis Handly — Mon, 28 Jul 2008 12:20:53 GMT

>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.

Re: dual core cpu

Jan Zalman — Mon, 28 Jul 2008 12:28:53 GMT

Hi, there is a machinfo command, see the

http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?lang=en&cc=en&taskId=120&prodSeriesId=447335&prodTypeId=15351&objectID=c01161194

Regards

Re: dual core cpu

Sharma Sanjeev — Mon, 28 Jul 2008 12:35:19 GMT

Hi

System is having Dual Core CPU's

Re: dual core cpu

Oviwan — Mon, 28 Jul 2008 12:41:19 GMT

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...

Re: dual core cpu

mjos — Mon, 28 Jul 2008 12:51:34 GMT

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

Re: dual core cpu

Oviwan — Mon, 28 Jul 2008 12:56:02 GMT

you have 8 dual core cpu's

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

Re: dual core cpu

Jan Zalman — Mon, 28 Jul 2008 12:58:03 GMT

Look at the link above.

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

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

Re: dual core cpu

Sharma Sanjeev — Mon, 28 Jul 2008 12:59:06 GMT

Hi

run SAM > Performance Monitor > System Properties

Re: dual core cpu

mjos — Mon, 28 Jul 2008 13:00:09 GMT

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

Re: dual core cpu

mjos — Mon, 28 Jul 2008 13:09:28 GMT

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

Re: dual core cpu

Oviwan — Mon, 28 Jul 2008 13:10:14 GMT

see sam or here http://h20341.www2.hp.com/integrity/cache/342145-0-0-225-121.html

Re: dual core cpu

Dennis Handly — Mon, 28 Jul 2008 13:10:21 GMT

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

google pointed to Intel's web page for:
Itanium 9000 series

Re: dual core cpu

Sharma Sanjeev — Mon, 28 Jul 2008 13:12:16 GMT

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

Re: dual core cpu

Sharma Sanjeev — Mon, 28 Jul 2008 13:17:57 GMT

SORRY fOR TYPO ITS 8900 NOT 8800

Re: dual core cpu

Deepak Kr — Mon, 28 Jul 2008 13:28:38 GMT

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.

Re: dual core cpu

Dennis Handly — Mon, 28 Jul 2008 13:39:59 GMT

>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.

Re: dual core cpu

Torsten. — Mon, 28 Jul 2008 16:36:59 GMT

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!

Re: dual core cpu

mjos — Tue, 29 Jul 2008 12:31:42 GMT

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?

Re: dual core cpu

Sharma Sanjeev — Tue, 29 Jul 2008 12:43:54 GMT

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