The physical processor has 2 virtual processors -- What does this mean?

Hi,

psrinfo command display that "The physical processor has 2 virtual processors". What does this mean?

$ more /etc/release

Solaris 10 3/05 s10_74L2a X86

Use is subject to license terms.

Assembled 22 January 2005

$ psrinfo -pv

The physical processor has 2 virtual processors (0, 2)

x86 (chipid 0x0 GenuineIntel family 15 model 2 step 9 clock 2791 MHz)

Intel(r) Xeon(tm) CPU 2.80GHz

The physical processor has 2 virtual processors (1, 3)

x86 (chipid 0x3 GenuineIntel family 15 model 2 step 9 clock 2791 MHz)

Intel(r) Xeon(tm) CPU 2.80GHz

Please suggest,

Thanks & Regards

[733 byte] By [gshekar] at [2007-11-26 11:42:18]

# 1

In 'psrinfo', a processor is a single piece of hardware (chip).

Some devices have two processing units (cores) within the hardware package.

Some devices are set up so that a single unit runs two execution threads (hyperthreading).

Both of these types of multi-execution chips are used as a processor from the OS level, and reported as a virtual processor by psrinfo.

Darren

Darren_Dunham at 2007-7-7 11:49:03 >

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