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Operating Systems Linux finding core information in redhat Linux Post 302345187 by mglenney on Tuesday 18th of August 2009 04:03:51 PM
Old 08-18-2009
You're looking for physical id and core id. They both start from zero. I'm looking at a dual quad core system right now. I have 8 entries that look like:

physical id: 0
core id: 0
physical id: 0
core id: 1
...
physical id: 1
core id: 3

You can also get CPU info with
Code:
dmesg | grep -i cpu

A quick way to see how many cores total is to run 'top' and then press '1' on your keyboard. That will expand out the processor information at the top and will show you all the cores so you can do a quick count.
 

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GCORE(1)						      General Commands Manual							  GCORE(1)

NAME
gcore - get core image of running process SYNOPSIS
gcore [-s][-c core] pid DESCRIPTION
gcore creates a core image of each specified process, suitable for use with adb(1). By default the core image is written to the file <pid>.core. The options are: -c Write the core file to the specified file instead of <pid>.core. -s Stop the process while creating the core image and resume it when done. This makes sure that the core dump will be in a consistent state. The process is resumed even if it was already stopped. Of course, you can obtain the same result by manually stopping the process with kill(1). The core image name was changed from core.<pid> to <pid>.core to prevent matching names like core.h and core.c when using programs such as find(1). FILES
<process-id>.core The core image. BUGS
If gcore encounters an error while creating the core image and the -s option was used the process will remain stopped. Swapped out processes and system processes (the swapper) may not be gcore'd. 4.2 Berkeley Distribution April 15, 1994 GCORE(1)
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