From: Robert Nagy <robert@openbsd.org>
Subject: Re: vmware virtual machine latest snap only 1 cpu
To: Hrvoje Popovski <hrvoje@srce.hr>
Cc: tech@openbsd.org
Date: Sat, 7 Mar 2026 12:11:53 +0100

On 07/03/26 11:48 +0100, Hrvoje Popovski wrote:
> snap
> OpenBSD 7.8-current (GENERIC) #258: Fri Mar  6 12:18:01 MST 2026
>     deraadt@amd64.openbsd.org:/usr/src/sys/arch/amd64/compile/GENERIC

^^^^^ that's an UP kernel not MP.

> real mem = 8571977728 (8174MB)
> avail mem = 8285450240 (7901MB)
> random: good seed from bootblocks
> mpath0 at root
> scsibus0 at mpath0: 256 targets
> mainbus0 at root
> bios0 at mainbus0: SMBIOS rev. 2.7 @ 0xe0010 (260 entries)
> bios0: vendor Phoenix Technologies LTD version "6.00" date 11/12/2020
> bios0: VMware, Inc. VMware Virtual Platform
> acpi0 at bios0: ACPI 4.0
> acpi0: sleep states S0 S1 S4 S5
> acpi0: tables DSDT FACP BOOT APIC MCFG SRAT HPET WAET
> acpi0: wakeup devices PCI0(S3) USB_(S1) P2P0(S3) PE40(S3) S1F0(S3)
> PE50(S3) S1F0(S3) PE60(S3) S1F0(S3) PE70(S3) S1F0(S3) PE41(S3) S1F0(S3)
> PE42(S3) PE43(S3) PE44(S3) [...]
> acpitimer0 at acpi0: 3579545 Hz, 24 bits
> acpimadt0 at acpi0 addr 0xfee00000: PC-AT compat
> cpu0 at mainbus0: apid 0 (boot processor)
> cpu0: Intel(R) Xeon(R) Gold 6130 CPU @ 2.10GHz, 2095.13 MHz, 06-55-04
> cpu0: cpuid 1
> edx=1f8bfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,MMX,FXSR,SSE,SSE2,SS,HTT>
> ecx=f7fa3203<SSE3,PCLMUL,SSSE3,FMA3,CX16,PCID,SSE4.1,SSE4.2,x2APIC,MOVBE,POPCNT,DEADLINE,AES,XSAVE,AVX,F16C,RDRAND,HV>
> cpu0: cpuid 6 eax=4<ARAT>
> cpu0: cpuid 7.0
> ebx=d19f27eb<FSGSBASE,TSC_ADJUST,BMI1,AVX2,SMEP,BMI2,ERMS,INVPCID,AVX512F,AVX512DQ,RDSEED,ADX,SMAP,CLFLUSHOPT,CLWB,AVX512CD,AVX512BW,AVX512VL>
> ecx=8<PKU> edx=bc000400<MD_CLEAR,IBRS,IBPB,STIBP,L1DF,SSBD>
> cpu0: cpuid a vers=1, gp=4, gpwidth=48
> cpu0: cpuid d.1 eax=f<XSAVEOPT,XSAVEC,XGETBV1,XSAVES>
> cpu0: cpuid 80000001 edx=2c100800<NXE,PAGE1GB,RDTSCP,LONG>
> ecx=121<LAHF,ABM,3DNOWP>
> cpu0: cpuid 80000007 edx=100<ITSC>
> cpu0: msr 10a=c<RSBA,SKIP_L1DFL>
> cpu0: MELTDOWN
> cpu0: 32KB 64b/line 8-way D-cache, 32KB 64b/line 8-way I-cache, 1MB
> 64b/line 16-way L2 cache, 22MB 64b/line 11-way L3 cache
> cpu0: smt 0, core 0, package 0
> mtrr: Pentium Pro MTRR support, 8 var ranges, 88 fixed ranges
> cpu0: apic clock running at 66MHz
> cpu at mainbus0: not configured
> cpu at mainbus0: not configured
> cpu at mainbus0: not configured
> cpu at mainbus0: not configured
> cpu at mainbus0: not configured
> cpu at mainbus0: not configured
> cpu at mainbus0: not configured

I assume you have installed with 1 CPU on the VM and then changed the VM config to multiple cores.