On Sat, Oct 13, 2018 at 01:08:23AM +0000, Jordan Geoghegan wrote: > Hello, > > Not sure if this is a bug or not, so I thought I would ask misc@ first. > > I was writing a script in my vmm guest that involved killing and restarting > a long running process every hour using sleep "3600", and I noticed it ended > up sleeping for 2 hours and 56 minutes, rather than an hour. > > To test, I ran "time sleep 30" and got this result: > > vmm$ time sleep 30 > 0m57.50s real 0m00.00s user 0m00.00s system > > When run on bare metal, I get this result: > > server$ time sleep 30 > 0m30.00s real 0m00.00s user 0m00.00s system > > I have "sysctl kern.timecounter.hardware=tsc" set in the vm to prevent clock > drift, otherwise the vm clock runs at around half speed. > > When "time sleep 30" is run on a vm without "sysctl > kern.timecounter.hardware=tsc" set, it reports the correct amount of time > being spent sleeping, but since the clock runs at around half speed without > tsc enabled, it still ends up sleeping for almost a minute. > > The host machine is running 6.3 stable, the guest is running the latest > snapshot. I tried running a 6.3-stable guest with the same results. > > Has this been fixed in current? I don't have a vmm capable machine available > running current, I only own spare macppc and i386 hardware which runs > current.
I get the same results as yours also with a -current vm running on -current, also with kern.timecounter.hardware=tsc on the vm. # time sleep 30 0m59.99s real 0m00.00s user 0m00.00s system # time sleep 30 1m00.30s real 0m00.00s user 0m00.00s system # time sleep 30 1m00.30s real 0m00.00s user 0m00.00s system # I don't know if it's somehow related to the same interrupt thing, but I also get a slow scroll when attached to the console. OpenBSD 6.4 (GENERIC.MP) #364: Thu Oct 11 13:30:23 MDT 2018 dera...@amd64.openbsd.org:/usr/src/sys/arch/amd64/compile/GENERIC.MP real mem = 8451125248 (8059MB) avail mem = 8185724928 (7806MB) mpath0 at root scsibus0 at mpath0: 256 targets mainbus0 at root bios0 at mainbus0: SMBIOS rev. 2.6 @ 0xdae9c000 (64 entries) bios0: vendor LENOVO version "8DET73WW (1.43 )" date 10/12/2016 bios0: LENOVO 4291MV7 acpi0 at bios0: rev 2 acpi0: sleep states S0 S3 S4 S5 acpi0: tables DSDT FACP SLIC SSDT SSDT SSDT HPET APIC MCFG ECDT ASF! TCPA SSDT SSDT DMAR UEFI UEFI UEFI acpi0: wakeup devices LID_(S3) SLPB(S3) IGBE(S4) EXP4(S4) EXP7(S4) EHC1(S3) EHC2(S3) HDEF(S4) acpitimer0 at acpi0: 3579545 Hz, 24 bits acpihpet0 at acpi0: 14318179 Hz acpimadt0 at acpi0 addr 0xfee00000: PC-AT compat cpu0 at mainbus0: apid 0 (boot processor) cpu0: Intel(R) Core(TM) i5-2520M CPU @ 2.50GHz, 2492.33 MHz, 06-2a-07 cpu0: 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,SSE3,PCLMUL,DTES64,MWAIT,DS-CPL,VMX,SMX,EST,TM2,SSSE3,CX16,xTPR,PDCM,PCID,SSE4.1,SSE4.2,x2APIC,POPCNT,DEADLINE,AES,XSAVE,AVX,NXE,RDTSCP,LONG,LAHF,PERF,ITSC,IBRS,IBPB,STIBP,L1DF,SSBD,SENSOR,ARAT,XSAVEOPT,MELTDOWN cpu0: 256KB 64b/line 8-way L2 cache cpu0: smt 0, core 0, package 0 mtrr: Pentium Pro MTRR support, 10 var ranges, 88 fixed ranges cpu0: apic clock running at 99MHz cpu0: mwait min=64, max=64, C-substates=0.2.1.1.2, IBE cpu1 at mainbus0: apid 1 (application processor) cpu1: Intel(R) Core(TM) i5-2520M CPU @ 2.50GHz, 2491.91 MHz, 06-2a-07 cpu1: 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,SSE3,PCLMUL,DTES64,MWAIT,DS-CPL,VMX,SMX,EST,TM2,SSSE3,CX16,xTPR,PDCM,PCID,SSE4.1,SSE4.2,x2APIC,POPCNT,DEADLINE,AES,XSAVE,AVX,NXE,RDTSCP,LONG,LAHF,PERF,ITSC,IBRS,IBPB,STIBP,L1DF,SSBD,SENSOR,ARAT,XSAVEOPT,MELTDOWN cpu1: 256KB 64b/line 8-way L2 cache cpu1: smt 1, core 0, package 0 cpu2 at mainbus0: apid 2 (application processor) cpu2: Intel(R) Core(TM) i5-2520M CPU @ 2.50GHz, 2491.91 MHz, 06-2a-07 cpu2: 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,SSE3,PCLMUL,DTES64,MWAIT,DS-CPL,VMX,SMX,EST,TM2,SSSE3,CX16,xTPR,PDCM,PCID,SSE4.1,SSE4.2,x2APIC,POPCNT,DEADLINE,AES,XSAVE,AVX,NXE,RDTSCP,LONG,LAHF,PERF,ITSC,IBRS,IBPB,STIBP,L1DF,SSBD,SENSOR,ARAT,XSAVEOPT,MELTDOWN cpu2: 256KB 64b/line 8-way L2 cache cpu2: smt 0, core 1, package 0 cpu3 at mainbus0: apid 3 (application processor) cpu3: Intel(R) Core(TM) i5-2520M CPU @ 2.50GHz, 2491.91 MHz, 06-2a-07 cpu3: 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,SSE3,PCLMUL,DTES64,MWAIT,DS-CPL,VMX,SMX,EST,TM2,SSSE3,CX16,xTPR,PDCM,PCID,SSE4.1,SSE4.2,x2APIC,POPCNT,DEADLINE,AES,XSAVE,AVX,NXE,RDTSCP,LONG,LAHF,PERF,ITSC,IBRS,IBPB,STIBP,L1DF,SSBD,SENSOR,ARAT,XSAVEOPT,MELTDOWN cpu3: 256KB 64b/line 8-way L2 cache cpu3: smt 1, core 1, package 0 ioapic0 at mainbus0: apid 2 pa 0xfec00000, version 20, 24 pins acpimcfg0 at acpi0 acpimcfg0: addr 0xf8000000, bus 0-63 acpiec0 at acpi0 acpiprt0 at acpi0: bus 0 (PCI0) acpiprt1 at acpi0: bus -1 (PEG_) acpiprt2 at acpi0: bus 2 (EXP1) acpiprt3 at acpi0: bus 3 (EXP2) acpiprt4 at acpi0: bus 5 (EXP4) acpiprt5 at acpi0: bus 13 (EXP5) acpiprt6 at acpi0: bus -1 (EXP7) acpicpu0 at acpi0: C3(350@104 io@0x415), C1(1000@1 halt), PSS acpicpu1 at acpi0: C3(350@104 io@0x415), C1(1000@1 halt), PSS acpicpu2 at acpi0: C3(350@104 io@0x415), C1(1000@1 halt), PSS acpicpu3 at acpi0: C3(350@104 io@0x415), C1(1000@1 halt), PSS acpipwrres0 at acpi0: PUBS, resource for EHC1, EHC2 acpitz0 at acpi0: critical temperature is 99 degC acpibtn0 at acpi0: LID_ acpibtn1 at acpi0: SLPB acpicmos0 at acpi0 acpibat0 at acpi0: BAT0 model "45N1023" serial 16065 type LION oem "SANYO" acpiac0 at acpi0: AC unit online acpithinkpad0 at acpi0 "IBM0079" at acpi0 not configured "PNP0C14" at acpi0 not configured "PNP0C14" at acpi0 not configured acpidock0 at acpi0: GDCK docked (15) acpivideo0 at acpi0: VID_ acpivout at acpivideo0 not configured acpivideo1 at acpi0: VID_ cpu0: Enhanced SpeedStep 2492 MHz: speeds: 2501, 2500, 2200, 2000, 1800, 1600, 1400, 1200, 1000, 800 MHz pci0 at mainbus0 bus 0 pchb0 at pci0 dev 0 function 0 "Intel Core 2G Host" rev 0x09 inteldrm0 at pci0 dev 2 function 0 "Intel HD Graphics 3000" rev 0x09 drm0 at inteldrm0 inteldrm0: msi inteldrm0: 1366x768, 32bpp wsdisplay0 at inteldrm0 mux 1: console (std, vt100 emulation) wsdisplay0: screen 1-5 added (std, vt100 emulation) "Intel 6 Series MEI" rev 0x04 at pci0 dev 22 function 0 not configured em0 at pci0 dev 25 function 0 "Intel 82579LM" rev 0x04: msi, address f0:de:f1:7c:7b:f5 ehci0 at pci0 dev 26 function 0 "Intel 6 Series USB" rev 0x04: apic 2 int 16 usb0 at ehci0: USB revision 2.0 uhub0 at usb0 configuration 1 interface 0 "Intel EHCI root hub" rev 2.00/1.00 addr 1 azalia0 at pci0 dev 27 function 0 "Intel 6 Series HD Audio" rev 0x04: msi azalia0: codecs: Conexant CX20590, Intel/0x2805, using Conexant CX20590 audio0 at azalia0 ppb0 at pci0 dev 28 function 0 "Intel 6 Series PCIE" rev 0xb4: msi pci1 at ppb0 bus 2 ppb1 at pci0 dev 28 function 1 "Intel 6 Series PCIE" rev 0xb4: msi pci2 at ppb1 bus 3 iwn0 at pci2 dev 0 function 0 "Intel WiFi Link 1000" rev 0x00: msi, MIMO 1T2R, BGS, address 74:e5:0b:19:5c:82 ppb2 at pci0 dev 28 function 3 "Intel 6 Series PCIE" rev 0xb4: msi pci3 at ppb2 bus 5 ppb3 at pci0 dev 28 function 4 "Intel 6 Series PCIE" rev 0xb4: msi pci4 at ppb3 bus 13 sdhc0 at pci4 dev 0 function 0 "Ricoh 5U822 SD/MMC" rev 0x07: apic 2 int 16 sdhc0: SDHC 3.0, 50 MHz base clock sdmmc0 at sdhc0: 4-bit, sd high-speed, mmc high-speed, dma ehci1 at pci0 dev 29 function 0 "Intel 6 Series USB" rev 0x04: apic 2 int 23 usb1 at ehci1: USB revision 2.0 uhub1 at usb1 configuration 1 interface 0 "Intel EHCI root hub" rev 2.00/1.00 addr 1 pcib0 at pci0 dev 31 function 0 "Intel QM67 LPC" rev 0x04 ahci0 at pci0 dev 31 function 2 "Intel 6 Series AHCI" rev 0x04: msi, AHCI 1.3 ahci0: port 0: 6.0Gb/s scsibus1 at ahci0: 32 targets sd0 at scsibus1 targ 0 lun 0: <ATA, WDC WDS120G1G0A-, Z331> SCSI3 0/direct fixed naa.5001b444a69bf89b sd0: 114473MB, 512 bytes/sector, 234441648 sectors, thin ichiic0 at pci0 dev 31 function 3 "Intel 6 Series SMBus" rev 0x04: apic 2 int 18 iic0 at ichiic0 spdmem0 at iic0 addr 0x50: 4GB DDR3 SDRAM PC3-10600 SO-DIMM spdmem1 at iic0 addr 0x51: 4GB DDR3 SDRAM PC3-10600 SO-DIMM isa0 at pcib0 isadma0 at isa0 pckbc0 at isa0 port 0x60/5 irq 1 irq 12 pckbd0 at pckbc0 (kbd slot) wskbd0 at pckbd0: console keyboard, using wsdisplay0 pms0 at pckbc0 (aux slot) wsmouse0 at pms0 mux 0 wsmouse1 at pms0 mux 0 pms0: Synaptics clickpad, firmware 8.0, 0x1e2b1 0x940300 pcppi0 at isa0 port 0x61 spkr0 at pcppi0 aps0 at isa0 port 0x1600/31 vmm0 at mainbus0: VMX/EPT uhub2 at uhub0 port 1 configuration 1 interface 0 "Intel Rate Matching Hub" rev 2.00/0.00 addr 2 uhub3 at uhub2 port 1 configuration 1 interface 0 "Standard Microsystems product 0x2514" rev 2.00/0.00 addr 3 uhidev0 at uhub3 port 1 configuration 1 interface 0 "CM Storm Quickfire TKL Nkeys" rev 1.10/1.11 addr 4 uhidev0: iclass 3/1 ukbd0 at uhidev0: 64 variable keys, 0 key codes, country code 33 wskbd1 at ukbd0 mux 1 wskbd1: connecting to wsdisplay0 uhidev1 at uhub3 port 1 configuration 1 interface 1 "CM Storm Quickfire TKL Nkeys" rev 1.10/1.11 addr 4 uhidev1: iclass 3/0, 3 report ids uhid0 at uhidev1 reportid 1: input=2, output=0, feature=0 uhid1 at uhidev1 reportid 2: input=1, output=0, feature=0 ukbd1 at uhidev1 reportid 3: 56 variable keys, 0 key codes, country code 33 wskbd2 at ukbd1 mux 1 wskbd2: connecting to wsdisplay0 uhidev2 at uhub3 port 3 configuration 1 interface 0 "Dell Dell USB Optical Mouse" rev 2.00/43.01 addr 5 uhidev2: iclass 3/1 ums0 at uhidev2: 3 buttons, Z dir wsmouse2 at ums0 mux 0 urtwn0 at uhub2 port 2 configuration 1 interface 0 "Realtek 802.11n NIC" rev 2.00/0.00 addr 6 urtwn0: MAC/BB RTL8188EU, RF 6052 1T1R, address 50:3e:aa:30:f4:83 ugen0 at uhub2 port 4 "Broadcom Corp Broadcom Bluetooth Device" rev 2.00/7.48 addr 7 uhub4 at uhub1 port 1 configuration 1 interface 0 "Intel Rate Matching Hub" rev 2.00/0.00 addr 2 vscsi0 at root scsibus2 at vscsi0: 256 targets softraid0 at root scsibus3 at softraid0: 256 targets sd1 at scsibus3 targ 1 lun 0: <OPENBSD, SR CRYPTO, 006> SCSI2 0/direct fixed sd1: 114470MB, 512 bytes/sector, 234435953 sectors root on sd1a (69820133ee5efcb1.a) swap on sd1b dump on sd1b -- db