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By Mark Russinovich
Published: February 22, 2021
Download Coreinfo (370 KB)
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.
Extract the archive to a directory and then run Coreinfo by typing from that directory
Coreinfo in the console on a 32 bit Windows version or
Coreinfo64 for a 64 bit version.
For each resource it shows a map of the OS-visible processors that correspond to the specified resources, with '*' representing the applicable processors. For example, on a 4-core system, a line in the cache output with a map of shared by cores 3 and 4.
Usage: coreinfo [-c][-f][-g][-l][-n][-s][-m][-v]
|-c||Dump information on cores.|
|-f||Dump core feature information.|
|-g||Dump information on groups.|
|-l||Dump information on caches.|
|-n||Dump information on NUMA nodes.|
|-s||Dump information on sockets.|
|-m||Dump NUMA access cost.|
|-v||Dump only virtualization-related features including support for second level address translation.|
|(requires administrative rights on Intel systems).|
All options except -v are selected by default.
Coreinfo v3.03 - Dump information on system CPU and memory topology Copyright (C) 2008-2011 Mark Russinovich Sysinternals - www.sysinternals.comIntel(R) Xeon(R) CPU W3520 @ 2.67GHz Intel64 Family 6 Model 26 Stepping 5, GenuineIntel EM64T * Supports 64-bit mode VMX - Supports Intel hardware-assisted virtualization SVM - Supports AMD hardware-assisted virtualization HYPERVISOR * Hypervisor is present HTT * Supports hyper-threadingSMX - Supports Intel trusted execution SKINIT - Supports AMD SKINIT EIST * Supports Enhanced Intel SpeedstepNX * Supports no-execute page protection PAGE1GB - Supports 1GB large pages PAE * Supports > 32-bit physical addresses PAT * Supports Page Attribute Table PSE * Supports 4-MB pages PSE36 * Supports > 32-bit address 4-MB pages PGE * Supports global bit in page tables SS * Supports bus snooping for cache operations VME * Supports Virtual-8086 modeFPU * Implements i387 FP instructions MMX * Supports MMX instruction set MMXEXT - Implements AMD MMX extensions 3DNOW - Supports 3DNow! instructions 3DNOWEXT - Supports 3DNow! extension instructions SSE * Supports Streaming SIMD Extensions SSE2 * Supports Streaming SIMD Extensions 2 SSE3 * Supports Streaming SIMD Extensions 3 SSSE3 * Supports Supplemental SIMD Extensions 3 SSE4.1 * Supports Streaming SIMD Extensions 4.1 SSE4.2 * Supports Streaming SIMD Extensions 4.2AES - Supports AES extensions AVX - Supports AVX intruction extensions FMA - Supports FMA extensions using YMM state MSR * Implements RDMSR/WRMSR instructions MTTR * Supports Mmeory Type Range Registers XSAVE - Supports XSAVE/XRSTOR instructions OSXSAVE - Supports XSETBV/XGETBV instructionsCMOV * Supports CMOVcc instruction CLFSH * Supports CLFLUSH instruction CX8 * Supports compare and exchange 8-byte instructions CX16 * Supports CMPXCHG16B instruction DCA - Supports prefetch from memory-mapped device F16C - Supports half-precision instruction FXSR * Supports FXSAVE/FXSTOR instructions FFXSR - Supports optimized FXSAVE/FSRSTOR instruction MONITOR - Supports MONITOR and MWAIT instructions MOVBE - Supports MOVBE instruction PCLULDQ - Supports PCLMULDQ instruction POPCNT * Supports POPCNT instruction SEP * Supports fast system call instructionsDE * Supports I/O breakpoints including CR4.DE DTES64 - Can write history of 64-bit branch addresses DS - Implements memory-resident debug buffer DS-CPL - Supports Debug Store feature with CPL PCID - Supports PCIDs and settable CR4.PCIDE PDCM - Supports Performance Capabilities MSR RDTSCP * Supports RDTSCP instruction TSC * Supports RDTSC instruction TSC-DEADLINE - Local APIC supports one-shot deadline timer xTPR * Supports disabling task priority messagesACPI * Implements MSR for power management TM * Implements thermal monitor circuitry TM2 * Implements Thermal Monitor 2 control APIC * Implements software-accessible local APIC x2APIC - Supports x2APICCNXT-ID - L1 data cache mode adaptive or BIOSMCE * Supports Machine Check, INT18 and CR4.MCE MCA * Implements Machine Check Architecture PBE * Supports use of FERR#/PBE# pinPSN - Implements 96-bit processor serial numberLogical to Physical Processor Map: *--- Physical Processor 0 -*-- Physical Processor 1 --*- Physical Processor 2 ---* Physical Processor 3Logical Processor to Socket Map: **** Socket 0Logical Processor to NUMA Node Map: **** NUMA Node 0Logical Processor to Cache Map: *--- Data Cache 0, Level 1, 32 KB, Assoc 8, LineSize 64 *--- Instruction Cache 0, Level 1, 32 KB, Assoc 4, LineSize 64 *--- Unified Cache 0, Level 2, 256 KB, Assoc 8, LineSize 64 -*-- Data Cache 1, Level 1, 32 KB, Assoc 8, LineSize 64 -*-- Instruction Cache 1, Level 1, 32 KB, Assoc 4, LineSize 64 -*-- Unified Cache 1, Level 2, 256 KB, Assoc 8, LineSize 64 --*- Data Cache 2, Level 1, 32 KB, Assoc 8, LineSize 64 --*- Instruction Cache 2, Level 1, 32 KB, Assoc 4, LineSize 64 --*- Unified Cache 2, Level 2, 256 KB, Assoc 8, LineSize 64 ---* Data Cache 3, Level 1, 32 KB, Assoc 8, LineSize 64 ---* Instruction Cache 3, Level 1, 32 KB, Assoc 4, LineSize 64 ---* Unified Cache 3, Level 2, 256 KB, Assoc 8, LineSize 64 **** Unified Cache 4, Level 3, 8 MB, Assoc 16, LineSize 64Logical Processor to Group Map: **** Group 0
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