is vmm hitting the https://marc.info/?l=openbsd-misc&m=140291038202783&w=2
issue now that it's MP?
On 2026/10/22 14:14, Brian Conway wrote:
> Greetings. In my experience, OpenBSD i386 guests on vmm have never been speed
> demons, but they've always been very usable for testing and builds from the
> -stable branch. Timekeeping issues of the past had also been resolved by
> 7.9-release, which was great. I recently updated my vmm/vmd host to
> 8.0-stable, and I've found the same i386 guests have become extremely slow.
>
> Anecdotally:
>
> - The 'cleaning /tmp' step of boot takes 18s (but /tmp is mostly empty).
> - Each item of boot's reordering process takes 8-10 seconds.
> - The initial screen paint of `top` takes a full 1s, previously instantaneous.
> - When the guest is idle, the host CPU usage is low. So no process spinning
> away at 100%.
>
> Some configurations variations that I've tried, without noticeable change:
>
> - bsd.sp guest
> - bs.mp guest with cpu count 2 or 3, and relevant vm.conf
> - raw image vs qcow2 for guest drive
>
> The host's vm.conf is fairly mundane:
>
> vm "b80-i386" {
> disk "/space/vmm/disk/b80-i386.img"
> interface {
> locked lladdr fe:e1:bb:d1:7e:8d
> switch "uplink"
> }
> memory 2.5G
> }
>
> The host dmesg follows. If it's time for me to leave i386 behind, that's okay
> too.
>
> Thanks for the support.
>
> Brian Conway
>
> OpenBSD 8.0-stable (GENERIC.MP) #2: Tue Oct 20 15:45:17 UTC 2026
>
> [email protected]:/usr/src/sys/arch/amd64/compile/GENERIC.MP
> real mem = 17038417920 (16249MB)
> avail mem = 16498282496 (15733MB)
> random: good seed from bootblocks
> mpath0 at root
> scsibus0 at mpath0: 256 targets
> mainbus0 at root
> bios0 at mainbus0: SMBIOS rev. 3.2 @ 0x7a99f000 (76 entries)
> bios0: vendor Intel Corp. version "BECFL357.86A.0098.2026.0204.1428" date
> 02/04/2026
> bios0: Intel(R) Client Systems NUC8i5BEH
> efi0 at bios0: UEFI 2.7
> efi0: American Megatrends rev 0x5000d
> acpi0 at bios0: ACPI 6.1
> acpi0: sleep states S0 S3 S4 S5
> acpi0: tables DSDT FACP APIC FPDT FIDT MCFG SSDT SSDT HPET SSDT SSDT UEFI
> LPIT SSDT SSDT DBGP DBG2 DMAR SSDT BGRT WSMT
> acpi0: wakeup devices SIO1(S3) RP01(S4) PXSX(S4) RP02(S4) PXSX(S4) RP03(S4)
> PXSX(S4) RP04(S4) PXSX(S4) RP05(S4) PXSX(S4) RP06(S4) PXSX(S4) RP07(S4)
> PXSX(S4) RP08(S4) [...]
> 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) Core(TM) i5-8259U CPU @ 2.30GHz, 2194.89 MHz, 06-8e-0a, patch
> 000000f6
> cpu0: cpuid 1
> edx=bfebfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE>
>
> ecx=77fafbbf<SSE3,PCLMUL,DTES64,MWAIT,DS-CPL,VMX,EST,TM2,SSSE3,SDBG,FMA3,CX16,xTPR,PDCM,PCID,SSE4.1,SSE4.2,x2APIC,MOVBE,POPCNT,DEADLINE,AES,XSAVE,AVX,F16C,RDRAND>
> cpu0: cpuid 6 eax=27f7<SENSOR,ARAT,PTS> ecx=9<EFFFREQ>
> cpu0: cpuid 7.0
> ebx=29c67af<FSGSBASE,TSC_ADJUST,SGX,BMI1,AVX2,SMEP,BMI2,ERMS,INVPCID,MPX,RDSEED,ADX,SMAP,CLFLUSHOPT,PT>
> edx=bc002e00<SRBDS_CTRL,MD_CLEAR,TSXFA,IBRS,IBPB,STIBP,L1DF,SSBD>
> cpu0: cpuid a vers=4, gp=8, gpwidth=48, ff=3, ffwidth=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=a000c04<RSBA,MISC_PKG_CT,ENERGY_FILT,GDS_CTRL,RFDS_NO>
> cpu0: MELTDOWN
> cpu0: 32KB 64b/line 8-way D-cache, 32KB 64b/line 8-way I-cache, 256KB
> 64b/line 4-way L2 cache, 6MB 64b/line 12-way L3 cache
> cpu0: smt 0, core 0, package 0, type P
> mtrr: Pentium Pro MTRR support, 10 var ranges, 88 fixed ranges
> cpu0: apic clock running at 24MHz
> cpu0: mwait min=64, max=64, C-substates=0.2.1.2.4.1.1.1, IBE
> cpu1 at mainbus0: apid 2 (application processor)
> cpu1: Intel(R) Core(TM) i5-8259U CPU @ 2.30GHz, 2194.89 MHz, 06-8e-0a, patch
> 000000f6
> cpu1: smt 0, core 1, package 0, type P
> cpu2 at mainbus0: apid 4 (application processor)
> cpu2: Intel(R) Core(TM) i5-8259U CPU @ 2.30GHz, 2194.89 MHz, 06-8e-0a, patch
> 000000f6
> cpu2: smt 0, core 2, package 0, type P
> cpu3 at mainbus0: apid 6 (application processor)
> cpu3: Intel(R) Core(TM) i5-8259U CPU @ 2.30GHz, 2194.89 MHz, 06-8e-0a, patch
> 000000f6
> cpu3: smt 0, core 3, package 0, type P
> ioapic0 at mainbus0: apid 2 pa 0xfec00000, version 20, 120 pins
> acpimcfg0 at acpi0
> acpimcfg0: addr 0xe0000000, bus 0-255
> acpihpet0 at acpi0: 23999999 Hz
> acpiprt0 at acpi0: bus 0 (PCI0)
> acpiprt1 at acpi0: bus -1 (PEG0)
> acpiprt2 at acpi0: bus -1 (PEG1)
> acpiprt3 at acpi0: bus -1 (PEG2)
> acpiprt4 at acpi0: bus -1 (RP01)
> acpiprt5 at acpi0: bus -1 (RP02)
> acpiprt6 at acpi0: bus -1 (RP03)
> acpiprt7 at acpi0: bus -1 (RP04)
> acpiprt8 at acpi0: bus -1 (RP05)
> acpiprt9 at acpi0: bus -1 (RP06)
> acpiprt10 at acpi0: bus -1 (RP07)
> acpiprt11 at acpi0: bus -1 (RP08)
> acpiprt12 at acpi0: bus -1 (RP09)
> acpiprt13 at acpi0: bus -1 (RP10)
> acpiprt14 at acpi0: bus -1 (RP11)
> acpiprt15 at acpi0: bus -1 (RP12)
> acpiprt16 at acpi0: bus -1 (RP13)
> acpiprt17 at acpi0: bus -1 (RP14)
> acpiprt18 at acpi0: bus -1 (RP15)
> acpiprt19 at acpi0: bus -1 (RP16)
> acpiprt20 at acpi0: bus -1 (RP17)
> acpiprt21 at acpi0: bus -1 (RP18)
> acpiprt22 at acpi0: bus -1 (RP19)
> acpiprt23 at acpi0: bus -1 (RP20)
> acpiprt24 at acpi0: bus -1 (RP21)
> acpiprt25 at acpi0: bus -1 (RP22)
> acpiprt26 at acpi0: bus -1 (RP23)
> acpiprt27 at acpi0: bus -1 (RP24)
> acpiec0 at acpi0
> acpipci0 at acpi0 PCI0: 0x00000000 0x00000011 0x00000001
> pchgpio0 at acpi0 GPI0 addr 0xfd6e0000/0x10000 0xfd6d0000/0x10000
> 0xfd6a0000/0x10000 irq 14, 320 pins
> "ACPI000E" at acpi0 not configured
> "PNP0C14" at acpi0 not configured
> acpibtn0 at acpi0: SLPB
> "PNP0C14" at acpi0 not configured
> "PNP0C14" at acpi0 not configured
> intelpmc0 at acpi0: PEPD
> state 0: 0x7f:1:2:0x00:0x0000000000000060
> counter: 0x7f:64:0:0x00:0x0000000000000632
> frequency: 0
> state 1: 0x7f:1:2:0x00:0x0000000000000060
> counter: 0x00:32:0:0x03:0x00000000fe00193c
> frequency: 10000
> acpibtn1 at acpi0: PWRB
> "PNP0C0B" at acpi0 not configured
> "PNP0C0B" at acpi0 not configured
> "PNP0C0B" at acpi0 not configured
> "PNP0C0B" at acpi0 not configured
> "PNP0C0B" at acpi0 not configured
> "PNP0C14" at acpi0 not configured
> acpitz0 at acpi0
> acpitz0: TZ0_: failed to read _HOT
> acpitz0: TZ0_: failed to read _TMP
> acpipwrres0 at acpi0: USBC, resource for XDCI
> acpipwrres1 at acpi0: V0PR
> acpipwrres2 at acpi0: V1PR
> acpipwrres3 at acpi0: V2PR
> acpipwrres4 at acpi0: WRST
> acpicpu0 at acpi0: C3(200@1034 mwait.1@0x60), C2(200@151 mwait.1@0x33),
> C1(1000@1 mwait.1), PSS
> acpicpu1 at acpi0: C3(200@1034 mwait.1@0x60), C2(200@151 mwait.1@0x33),
> C1(1000@1 mwait.1), PSS
> acpicpu2 at acpi0: C3(200@1034 mwait.1@0x60), C2(200@151 mwait.1@0x33),
> C1(1000@1 mwait.1), PSS
> acpicpu3 at acpi0: C3(200@1034 mwait.1@0x60), C2(200@151 mwait.1@0x33),
> C1(1000@1 mwait.1), PSS
> acpipwrres5 at acpi0: FN00, resource for FAN0
> acpipwrres6 at acpi0: FN01, resource for FAN1
> acpipwrres7 at acpi0: FN02, resource for FAN2
> acpipwrres8 at acpi0: FN03, resource for FAN3
> acpipwrres9 at acpi0: FN04, resource for FAN4
> acpitz1 at acpi0
> acpitz1: critical temperature is 119 degC
> acpipwrres10 at acpi0: PIN_
> acpivideo0 at acpi0: GFX0
> acpivout0 at acpivideo0: DD1F
> cpu0: using VERW MDS workaround (except on vmm entry)
> cpu0: Enhanced SpeedStep 2194 MHz: speeds: 2301, 2300, 2200, 2000, 1900,
> 1800, 1600, 1500, 1300, 1100, 1000, 900, 800, 700, 500, 400 MHz
> pci0 at mainbus0 bus 0
> pchb0 at pci0 dev 0 function 0 "Intel Core 8G Host" rev 0x08
> inteldrm0 at pci0 dev 2 function 0 "Intel Iris Plus 655" rev 0x01
> drm0 at inteldrm0
> inteldrm0: msi, COFFEELAKE, gen 9
> "Intel Core GMM" rev 0x00 at pci0 dev 8 function 0 not configured
> pchtemp0 at pci0 dev 18 function 0 "Intel 300 Series Thermal" rev 0x30
> xhci0 at pci0 dev 20 function 0 "Intel 300 Series xHCI" rev 0x30: msi, xHCI
> 1.10
> usb0 at xhci0: USB revision 3.0
> uhub0 at usb0 configuration 1 interface 0 "Intel xHCI root hub" rev 3.00/1.00
> addr 1
> "Intel 300 Series Shared SRAM" rev 0x30 at pci0 dev 20 function 2 not
> configured
> "Intel 300 Series MEI" rev 0x30 at pci0 dev 22 function 0 not configured
> ahci0 at pci0 dev 23 function 0 "Intel 300 Series AHCI" rev 0x30: msi, AHCI
> 1.3.1
> ahci0: port 2: 6.0Gb/s
> scsibus1 at ahci0: 32 targets
> sd0 at scsibus1 targ 2 lun 0: <ATA, Samsung SSD 860, RVT0>
> naa.5002538e19a4df9d
> sd0: 953869MB, 512 bytes/sector, 1953525168 sectors, thin
> pcib0 at pci0 dev 31 function 0 "Intel 300 Series LPC" rev 0x30
> ichiic0 at pci0 dev 31 function 4 "Intel 300 Series SMBus" rev 0x30: apic 2
> int 16
> iic0 at ichiic0
> iic0: addr 0x18 00=00 01=00 02=00 03=00 04=00 05=c2 06=1c 07=22 08=00 09=00
> words 00=00ef 01=0000 02=0000 03=0000 04=0000 05=c28c 06=1c68 07=2202
> iic0: addr 0x1a 00=00 01=00 02=00 03=00 04=00 05=c2 06=1c 07=22 08=00 09=00
> words 00=00ef 01=0000 02=0000 03=0000 04=0000 05=c278 06=1c68 07=2202
> spdmem0 at iic0 addr 0x50: 8GB DDR4 SDRAM PC4-19200 SO-DIMM with thermal
> sensor
> spdmem1 at iic0 addr 0x52: 8GB DDR4 SDRAM PC4-19200 SO-DIMM with thermal
> sensor
> "Intel 300 Series SPI" rev 0x30 at pci0 dev 31 function 5 not configured
> em0 at pci0 dev 31 function 6 "Intel I219-V" rev 0x30: msi, address
> 94:c6:91:a8:54:23
> isa0 at pcib0
> isadma0 at isa0
> com0 at isa0 port 0x3f8/8 irq 4: ns16550a, 16 byte fifo
> com0: probed fifo depth: 0 bytes
> pcppi0 at isa0 port 0x61
> spkr0 at pcppi0
> vmm0 at mainbus0: VMX/EPT
> efifb at mainbus0 not configured
> enable mbufs in high memory
> vscsi0 at root
> scsibus2 at vscsi0: 256 targets
> softraid0 at root
> scsibus3 at softraid0: 256 targets
> root on sd0a (517e210a894a1103.a) swap on sd0b dump on sd0b
> drm:pid0:skl_ddi_pll_enable *ERROR* [drm] *ERROR* DPLL 1 not locked
> inteldrm0: 1680x1050, 32bpp
> wsdisplay0 at inteldrm0 mux 1: console (std, vt100 emulation)
> wsdisplay0: screen 1-5 added (std, vt100 emulation)
>
