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By Mark Russinovich

Published: April 28, 2020

Download Coreinfo(367 KB)

Introduction

Coreinfo is a command-line utility that shows you the mapping between logical processors and the physical processor, NUMA node, and socket on which they reside, as well as the cache’s assigned to each logical processor. It uses the Windows’ GetLogicalProcessorInformation function to obtain this information and prints it to the screen, representing a mapping to a logical processor with an asterisk e.g. ‘*’. Coreinfo is useful for gaining insight into the processor and cache topology of your system.

Installation

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You run Coreinfo by typing 'coreinfo”.

Using CoreInfo

For each resource it shows a map of the OS-visible processorsthat correspond to the specified resources, with '*' representing theapplicable processors. For example, on a 4-core system, a line in thecache output with a map of shared by cores 3 and 4.

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Usage: coreinfo [-c][-f][-g][-l][-n][-s][-m][-v]

ParameterDescription
-cDump information on cores.
-fDump core feature information.
-gDump information on groups.
-lDump information on caches.
-nDump information on NUMA nodes.
-sDump information on sockets.
-mDump NUMA access cost.
-vDump only virtualization-related features including support for second level address translation.
(requires administrative rights on Intel systems).
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Code

All options except -v are selected by default.

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Coreinfo Output:

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Download Coreinfo(367 KB)