topic Re: redhat linux - real cpu # in Operating System - Linux

redhat linux - real cpu #

Wilfred Chau_1 — Mon, 17 Apr 2006 18:38:00 GMT

For a single HT/MP cpu system, when I cat /proc/cpuinfo, it shows 2 CPUs with the same cpu or physical id. I am just wondering if there is a smarter way to find out the # of physical CPU installed on a system.

Re: redhat linux - real cpu #

Stuart Browne — Mon, 17 Apr 2006 20:48:22 GMT

No, from what I can see, the output of 'cat /proc/cpuinfo | grep physical.id | sort | uniq -c' is what's gonna get you the accurate count.

The ACPI stuff doesn't see them as the same processor on a 2.6 machine..

Re: redhat linux - real cpu #

Sung Oh — Tue, 18 Apr 2006 02:11:57 GMT

Hi,

You can also check interrupts file to get number of CPU count and status.

#cat /proc/interrupts

Regards,

Sung

Re: redhat linux - real cpu #

Wilfred Chau_1 — Tue, 18 Apr 2006 11:31:46 GMT

This is my /proc/interrupt. What does this mean? I could have a dual CPUs system. This file may not help in that case?

CPU0 CPU1
0: 21510621 0 IO-APIC-edge timer
1: 12566 0 IO-APIC-edge i8042
8: 2 0 IO-APIC-edge rtc
9: 1 0 IO-APIC-level acpi
12: 339446 0 IO-APIC-edge i8042
14: 172248 0 IO-APIC-edge ide0
169: 1092907 0 IO-APIC-level eth0
201: 158269 0 IO-APIC-level libata
209: 0 0 IO-APIC-level uhci_hcd:usb1, ehci_hcd:usb5
217: 0 0 IO-APIC-level uhci_hcd:usb2
225: 381 0 IO-APIC-level uhci_hcd:usb3, Intel ICH6
233: 0 0 IO-APIC-level uhci_hcd:usb4
NMI: 0 0
LOC: 21510970 21511020
ERR: 0
MIS: 0

Re: redhat linux - real cpu #

Rick Garland — Tue, 18 Apr 2006 12:12:53 GMT

Try the 'lshw' script. This will provide the information and in a easily readable format.

Re: redhat linux - real cpu #

Wilfred Chau_1 — Tue, 18 Apr 2006 12:19:01 GMT

Where is the lshw located? Couldn't find it from this forum too.

Re: redhat linux - real cpu #

Wilfred Chau_1 — Tue, 18 Apr 2006 12:45:05 GMT

Thanks Rick. I find lshw. I personally like the lshw -short output, very hpux like.

Thank you all.

Re: redhat linux - real cpu #

Wilfred Chau_1 — Tue, 18 Apr 2006 13:12:37 GMT

Thanks all.