Eu tenho um servidor CentOS KVM executando 1 OpenBSD, 1 CentOS e 2 convidados do FreeBSD.
Somente o convidado do openBSD tem uma carga de CPU mais alta no servidor KVM. 8-10% no servidor, enquanto o convidado está ocioso.
O único serviço que estou executando no guest é o pfctl. se eu desabilitar isso, a carga da CPU continua a mesma.
Há alguma alteração de desempenho que eu possa fazer no KVM Host / openBSd guest para melhorar isso.
A única diferença de hardware para os outros gusets é que o convidado do OpenBSD possui uma NIC PCI PassThru. Qual eu desabilitei como um teste e carga da CPU renotada em 8-10%.
Já passei por várias configurações no Virtual Manager, ou seja, configurando Discos para o VirtIO, Exibir para VGA / Nenhum etc, Configurações da CPU. Talvez uma configuração que esteja faltando, já que sou novo no qemu-kvm / libvirt?
ps output do OpenBSD.
ps aux |grep 26303
qemu 26303 10.0 10.1 1538672 1219800 ? SLl 09:12 2:32 /usr/libexec/qemu-kvm -name skips -S -machine pc-i440fx-rhel7.0.0,accel=kvm,usb=off -cpu Haswell,-rtm,-hle -m 1024 -realtime mlock=off -smp 1,sockets=1,cores=1,threads=1 -uuid 0520a68a-de40-4187-8a9f-d1e05dc83255 -no-user-config -nodefaults -chardev socket,id=charmonitor,path=/var/lib/libvirt/qemu/domain-skips/monitor.sock,server,nowait -mon chardev=charmonitor,id=monitor,mode=control -rtc base=utc,driftfix=slew -global kvm-pit.lost_tick_policy=discard -no-hpet -no-shutdown -global PIIX4_PM.disable_s3=1 -global PIIX4_PM.disable_s4=1 -boot strict=on -device ich9-usb-ehci1,id=usb,bus=pci.0,addr=0x6.0x7 -device ich9-usb-uhci1,masterbus=usb.0,firstport=0,bus=pci.0,multifunction=on,addr=0x6 -device ich9-usb-uhci2,masterbus=usb.0,firstport=2,bus=pci.0,addr=0x6.0x1 -device ich9-usb-uhci3,masterbus=usb.0,firstport=4,bus=pci.0,addr=0x6.0x2 -device virtio-serial-pci,id=virtio-serial0,bus=pci.0,addr=0x5 -drive if=none,id=drive-ide0-0-1,readonly=on,format=raw -device ide-cd,bus=ide.0,unit=1,drive=drive-ide0-0-1,id=ide0-0-1 -drive file=/var/lib/libvirt/images/skips.qcow2,if=none,id=drive-ide0-1-0,format=qcow2 -device ide-hd,bus=ide.1,unit=0,drive=drive-ide0-1-0,id=ide0-1-0,bootindex=1 -netdev tap,fd=23,id=hostnet0 -device rtl8139,netdev=hostnet0,id=net0,mac=52:54:00:59:fd:17,bus=pci.0,addr=0x3 -chardev pty,id=charserial0 -device isa-serial,chardev=charserial0,id=serial0 -chardev spicevmc,id=charchannel0,name=vdagent -device virtserialport,bus=virtio-serial0.0,nr=1,chardev=charchannel0,id=channel0,name=com.redhat.spice.0 -spice port=5900,addr=127.0.0.1,disable-ticketing,seamless-migration=on -vga qxl -global qxl-vga.ram_size=67108864 -global qxl-vga.vram_size=67108864 -global qxl-vga.vgamem_mb=16 -device intel-hda,id=sound0,bus=pci.0,addr=0x4 -device hda-duplex,id=sound0-codec0,bus=sound0.0,cad=0 -chardev spicevmc,id=charredir0,name=usbredir -device usb-redir,chardev=charredir0,id=redir0 -chardev spicevmc,id=charredir1,name=usbredir -device usb-redir,chardev=charredir1,id=redir1 -device vfio-pci,host=03:00.0,id=hostdev0,bus=pci.0,addr=0x8 -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x7 -msg timestamp=on
root 26309 0.0 0.0 0 0 ? S 09:12 0:00 [kvm-pit/26303]
root 27346 0.0 0.0 112644 960 pts/4 S+ 09:37 0:00 grep --color=auto 26303
CENTOS KVM HOST TOP OUTPUT:
top - 08:59:25 up 1 day, 13:12, 2 users, load average: 0.11, 0.10, 0.10
Tasks: 145 total, 1 running, 144 sleeping, 0 stopped, 0 zombie
top - 09:05:53 up 1 day, 13:18, 2 users, load average: 0.02, 0.06, 0.08
Tasks: 143 total, 2 running, 141 sleeping, 0 stopped, 0 zombie
%Cpu(s): 1.2 us, 0.9 sy, 0.0 ni, 97.9 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st
KiB Mem : 11995120 total, 246888 free, 4868624 used, 6879608 buff/cache
KiB Swap: 6094844 total, 6083828 free, 11016 used. 6806152 avail Mem
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
26303 qemu 20 0 1537648 1.174g 11728 S 8.3 10.3 1:48.18 qemu-kvm
28147 qemu 20 0 1746032 1.084g 11672 S 1.3 9.5 18:33.98 qemu-kvm
2759 qemu 20 0 1646104 1.124g 11840 S 1.0 9.8 20:18.35 qemu-kvm
15927 qemu 20 0 1694228 1.052g 11632 S 0.7 9.2 25:24.74 qemu-kvm
OPENBSD GUEST TOP OUTPUT:
load averages: 0.09, 0.09, 0.08
26 processes: 25 idle, 1 on processor
CPU states: 0.0% user, 0.0% nice, 0.0% system, 0.0% interrupt, 100% idle
Memory: Real: 18M/62M act/tot Free: 920M Cache: 17M Swap: 0K/1264M
dmesg: (nota: baixou a memória RAM de 1024 para 256MB)
OpenBSD 5.8 (GENERIC) #1170: Sun Aug 16 02:26:00 MDT 2015
[email protected]:/usr/src/sys/arch/amd64/compile/GENERIC
real mem = 251650048 (239MB)
avail mem = 240300032 (229MB)
mpath0 at root
scsibus0 at mpath0: 256 targets
mainbus0 at root
bios0 at mainbus0: SMBIOS rev. 2.4 @ 0xf1e70 (10 entries)
bios0: vendor Seabios version "0.5.1" date 01/01/2011
bios0: Red Hat KVM
acpi0 at bios0: rev 0
acpi0: sleep states S5
acpi0: tables DSDT FACP SSDT APIC
acpi0: wakeup devices
acpitimer0 at acpi0: 3579545 Hz, 24 bits
acpimadt0 at acpi0 addr 0xfee00000: PC-AT compat
cpu0 at mainbus0: apid 0 (boot processor)
cpu0: Intel Core Processor (Haswell), 3292.72 MHz
cpu0: FPU,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,MMX,FXSR,SSE,SSE2,SSE3,PCLMUL,SSSE3,FMA3,CX16,PCID,SSE4.1,SSE4.2,x2APIC,MOVBE,POPCNT,DEADLINE,AES,XSAVE,AVX,HV,NXE,LONG,LAHF,FSGSBASE,BMI1,AVX2,SMEP,BMI2,ERMS,INVPCID
cpu0: 64KB 64b/line 2-way I-cache, 64KB 64b/line 2-way D-cache, 512KB 64b/line 16-way L2 cache
cpu0: ITLB 255 4KB entries direct-mapped, 255 4MB entries direct-mapped
cpu0: DTLB 255 4KB entries direct-mapped, 255 4MB entries direct-mapped
cpu0: smt 0, core 0, package 0
mtrr: Pentium Pro MTRR support, 8 var ranges, 88 fixed ranges
cpu0: apic clock running at 1000MHz
ioapic0 at mainbus0: apid 0 pa 0xfec00000, version 11, 24 pins
acpiprt0 at acpi0: bus 0 (PCI0)
acpicpu0 at acpi0: C1(@1 halt!)
pvbus0 at mainbus0: KVM
pci0 at mainbus0 bus 0
pchb0 at pci0 dev 0 function 0 "Intel 82441FX" rev 0x02
pcib0 at pci0 dev 1 function 0 "Intel 82371SB ISA" rev 0x00
pciide0 at pci0 dev 1 function 1 "Intel 82371SB IDE" rev 0x00: DMA, channel 0 wired to compatibility, channel 1 wired to compatibility
atapiscsi0 at pciide0 channel 0 drive 1
scsibus1 at atapiscsi0: 2 targets
cd0 at scsibus1 targ 0 lun 0: <QEMU, QEMU DVD-ROM, 1.5.> ATAPI 5/cdrom removable
cd0(pciide0:0:1): using PIO mode 4, DMA mode 2
wd0 at pciide0 channel 1 drive 0: <QEMU HARDDISK>
wd0: 16-sector PIO, LBA48, 20480MB, 41943040 sectors
wd0(pciide0:1:0): using PIO mode 4, DMA mode 2
piixpm0 at pci0 dev 1 function 3 "Intel 82371AB Power" rev 0x03: apic 0 int 9
iic0 at piixpm0
iic0: addr 0x18 00=00 01=00 02=00 03=00 04=00 05=00 06=00 07=00 08=00 words 00=0000 01=0000 02=0000 03=0000 04=0000 05=0000 06=0000 07=0000
iic0: addr 0x1a 00=00 01=00 02=00 03=00 04=00 05=00 06=00 07=00 08=00 words 00=0000 01=0000 02=0000 03=0000 04=0000 05=0000 06=0000 07=0000
iic0: addr 0x29 00=00 01=00 02=00 03=00 04=00 05=00 06=00 07=00 08=00 words 00=0000 01=0000 02=0000 03=0000 04=0000 05=0000 06=0000 07=0000
iic0: addr 0x2b 00=00 01=00 02=00 03=00 04=00 05=00 06=00 07=00 08=00 words 00=0000 01=0000 02=0000 03=0000 04=0000 05=0000 06=0000 07=0000
iic0: addr 0x4c 00=00 01=00 02=00 03=00 04=00 05=00 06=00 07=00 08=00 words 00=0000 01=0000 02=0000 03=0000 04=0000 05=0000 06=0000 07=0000
iic0: addr 0x4e 00=00 01=00 02=00 03=00 04=00 05=00 06=00 07=00 08=00 words 00=0000 01=0000 02=0000 03=0000 04=0000 05=0000 06=0000 07=0000
vga1 at pci0 dev 2 function 0 "Red Hat QXL Video" rev 0x04
wsdisplay0 at vga1 mux 1: console (80x25, vt100 emulation)
wsdisplay0: screen 1-5 added (80x25, vt100 emulation)
re0 at pci0 dev 3 function 0 "Realtek 8139" rev 0x20: RTL8139C+ (0x7480), apic 0 int 11, address 52:54:00:59:fd:17
rlphy0 at re0 phy 0: RTL internal PHY
azalia0 at pci0 dev 4 function 0 "Intel 82801FB HD Audio" rev 0x01: apic 0 int 11
azalia0: No codecs found
virtio0 at pci0 dev 5 function 0 "Qumranet Virtio Console" rev 0x00: Virtio Console Device
virtio0: no matching child driver; not configured
uhci0 at pci0 dev 6 function 0 "Intel 82801I USB" rev 0x03: apic 0 int 10
uhci1 at pci0 dev 6 function 1 "Intel 82801I USB" rev 0x03: apic 0 int 11
uhci2 at pci0 dev 6 function 2 "Intel 82801I USB" rev 0x03: apic 0 int 11
ehci0 at pci0 dev 6 function 7 "Intel 82801I USB" rev 0x03: apic 0 int 10
usb0 at ehci0: USB revision 2.0
uhub0 at usb0 "Intel EHCI root hub" rev 2.00/1.00 addr 1
virtio1 at pci0 dev 7 function 0 "Qumranet Virtio Memory" rev 0x00: Virtio Memory Balloon Device
viomb0 at virtio1
virtio1: apic 0 int 11
re1 at pci0 dev 8 function 0 "Realtek 8169" rev 0x10: RTL8169/8110SB (0x1000), apic 0 int 11, address 60:e3:27:03:9f:80
rgephy0 at re1 phy 7: RTL8169S/8110S/8211 PHY, rev. 3
isa0 at pcib0
isadma0 at isa0
fdc0 at isa0 port 0x3f0/6 irq 6 drq 2
fd0 at fdc0 drive 1: density unknown
com0 at isa0 port 0x3f8/8 irq 4: ns16550a, 16 byte fifo
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
pcppi0 at isa0 port 0x61
spkr0 at pcppi0
usb1 at uhci0: USB revision 1.0
uhub1 at usb1 "Intel UHCI root hub" rev 1.00/1.00 addr 1
usb2 at uhci1: USB revision 1.0
uhub2 at usb2 "Intel UHCI root hub" rev 1.00/1.00 addr 1
usb3 at uhci2: USB revision 1.0
uhub3 at usb3 "Intel UHCI root hub" rev 1.00/1.00 addr 1
nvram: invalid checksum
vscsi0 at root
scsibus2 at vscsi0: 256 targets
softraid0 at root
scsibus3 at softraid0: 256 targets
root on wd0a (92a6f3df5ed1df79.a) swap on wd0b dump on wd0b
clock: unknown CMOS layout
systat
1 users Load 0.11 0.12 0.08 Tue Feb 23 23:26:40 2016
memory totals (in KB) PAGING SWAPPING Interrupts
real virtual free in out in out 278 total
Active 19208 19208 174948 ops 100 clock
All 67940 67940 1469272 pages pciide0
110 re0
Proc:r d s w Csw Trp Sys Int Sof Flt forks 68 re1
3 223 1 42 180 222 7 fkppw
fksvm
0.8%Int 0.2%Sys 0.0%Usr 0.0%Nic 99.0%Idle pwait
| | | | | | | | | | | relck
rlkok
noram
Namei Sys-cache Proc-cache No-cache ndcpy
Calls hits % hits % miss % fltcp
zfod
cow
Disks cd0 wd0 fd0 2024 fmin
seeks 2698 ftarg
xfers itarg
speed 1 wired
sec pdfre
pdscn
pzidle
13 kmapent
uname -a (de centos 7 1511)
Linux benson 3.10.0-327.10.1.el7.x86_64 #1 SMP Tue Feb 16 17:03:50 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux
uname -a (do freebsd 10.2)
10.2-RELEASE FreeBSD 10.2-RELEASE #0 r286666: Wed Aug 12 15:26:37 UTC 2015 [email protected]:/usr/obj/usr/src/sys/GENERIC amd64
aprecie todas as dicas,
Philip
ATUALIZAÇÃO: verifiquei muitas das opções e não consegui reduzir os níveis de CPU. Em uma nota adicional, estou executando uma instância do openBSD sob xen e não estou experimentando altos níveis.