Relation b/w processor, core and cpu

[Srinikalyan]

Please explain me the relation between the cell, chip, processor, cpu and core? Those Jargons are really confusing for me even if I read lot of manuals.

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P.S. This Thread has been moved from Servers --> General to HP-UX --> Virtualization - Forum Moderator

[Torsten. · Accepted solution]

A "cell" (related to cell-based HP9000 or Integrity servers) carries the CPU and memory.

A "chip" is a chip - you need to mention the relation where this term was used.

Processor = CPU

"core" is normally used as the same term like processor or cpu. Since there are "multicore" cpus - "core" means a logical CPU inside a physical CPU module.

For example, a dual core CPU has 2 physical CPUs on a single chip - more or less.

[Srinikalyan]

test / > uname -a
HP-UX test B.11.23 U ia64 0669025396 unlimited-user license
test / >

test / > machinfo
CPU info:
Number of CPUs = 8
Clock speed = 1598 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

test / > top
System: test Thu Jul 3 12:26:36 2008
Load averages: 2.33, 1.87, 1.73
235 processes: 191 sleeping, 43 running, 1 zombie
Cpu states:
CPU LOAD USER NICE SYS IDLE BLOCK SWAIT INTR SSYS
0 2.33 4.3% 0.0% 35.3% 60.4% 0.0% 0.0% 0.0% 0.0%
--- ---- ----- ----- ----- ----- ----- ----- ----- -----
avg 2.33 4.3% 0.0% 35.3% 60.4% 0.0% 0.0% 0.0% 0.0%

Memory: 5177484K (4463288K) real, 6606960K (5717636K) virtual, 125572K free Pag
e# 1/20

Summary:
Number of CPUs = 8
32 Intel(R) Itanium 2 9000 series
CPU LOAD USER NICE SYS IDLE BLOCK SWAIT INTR SSYS
0 2.33 4.3% 0.0% 35.3% 60.4% 0.0% 0.0% 0.0% 0.0%

By seeing the above output, Is that mean I have 4 dual-core cpu in the npar but only 1 core is active in the vpar?

[Torsten.]

You have Itanium 2 9000 series CPUs (aka Montecito) - they are dual-core.

"vparstatus -v" will give you more details about the vPar config.

[Srinikalyan]

Torsten,
Please see the o/p below:
test / > vparstatus -p vpar2 -v
[Virtual Partition Details]
Name: vpar2
State: Up
Attributes: Dynamic,Autoboot,Nosearch
Kernel Path: /stand/vmunix
Boot Opts:

[CPU Details]
Min/Max: 1/8
User assigned [Path]:
Boot processor [Path]: 1.120
Monitor assigned [Path]:
Non-cell-specific:
User assigned [Count]: 0
Monitor assigned [Count]: 1
Cell-specific [Count]: Cell ID/Count


test / > ioscan -fnkCprocessor
Class I H/W Path Driver S/W State H/W Type Description
===================================================================
processor 0 1/120 processor CLAIMED PROCESSOR Processor

top o/p shows only 1 cpu.

From this I can able to figure out that i have 1 processor for the vpar. Is that mean I have one single core or one dual core?
Thanks,
Srini

[Torsten.]

"Monitor assigned [Count]: 1 "

This means you have 1 CPU (1 core) assigned to this vPAR.