topic idle cpu? in Operating System - HP-UX

idle cpu?

vulgate_1 — Sun, 12 Dec 2004 08:00:40 GMT

when system is booting,i can get log via consol.

Duplex Console IO Dependent Code (IODC) revision 1

------------------------------------------------------------------------------
(c) Copyright 1995-1998, Hewlett-Packard Company, All rights reserved
------------------------------------------------------------------------------

Processor Speed State CoProcessor State Cache Size
Number State Inst Data
--------- -------- --------------------- ----------------- ------------
0 440 MHz Active Functional 512 KB 1 MB
3 440 MHz Idle Functional 512 KB 1 MB

Central Bus Speed (in MHz) : 82
Available Memory : 3145728 KB
Good Memory Required : 16988 KB

Primary boot path: 0/0/1/1.2
Alternate boot path: 0/0/2/0.2
Console path: 0/0/4/0.0
Keyboard path: 0/0/4/0.0

i have a question about cpu
"processor number 3 state is idle"

but i use sam to get system info.

l System Properties (L1000) k
xlqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqkx
xx ^x
xx [ Refresh ] x
xx x
xx lqqqqqqqqqqqklqqqqqqqqklqqqqqqqqqqqqqqqqqqklqqqqqqqqqklqqqqqqqqqk x
xx x Processor xx Memory xx Operating System xx Network xx Dynamic x x
xx x \qqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqk x
xx xlqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqkx x
xx xxProcessors: xx x
xx xx Active: 2 xx x
xx xx Total: 2 xx x
xx xxCPU Version: PA 8500 CPU Module 3.1 xx x
xx xxClock Frequency: 440 MHz xx x
xx xxMachine Identification: 517706557 xx x
xx xxHardware Model: 9000/800/L1000-44 xx x
xx xxKernel Width Support: 64 xx x
xx xmqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqjx x
xx x x x
xx x xvx
xmqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqjx
xqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqx
x [ OK ] [ Help ] x
mqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqj

the two cpu is all active.
why?

Re: idle cpu?

Steven E. Protter — Sun, 12 Dec 2004 10:14:56 GMT

At boot time, only one cpu is in use. Thats the way HP-UX and the system do it. prior to that all cpu's and other hardware was checked for functionality.

After the OS boots, all cpu's are active.

What you noted is simply the various stages of bringing up the OS.

SEP

Re: idle cpu?

Sridhar Bhaskarla — Sun, 12 Dec 2004 19:44:53 GMT

Hi,

The scheduler in the Kernel that starts with the OS will take care of multi-processing. Until then only the 'monarch' CPU will be active and the 'rendezvous' processors will be shown idle.

-Sri

Re: idle cpu?

Nguyen Anh Tien — Mon, 13 Dec 2004 00:29:58 GMT

Wow. Before now. I think all CPU must active at boot time. after reading this post i found that only one CPU actived at boot time. thank SEP and Sri
I have question that. what CPU is actived at boot time if server has 4 CPU (what condition does server base on?)

Re: idle cpu?

Sridhar Bhaskarla — Mon, 13 Dec 2004 00:35:36 GMT

Hi,

The processor in the lowest slot will be selected as monarch generally. If the processor in the lowest slot is not available (due to manual deactivation, failure etc.,), then the next processor will be selected.

-Sri