我的专用服务器上有自己的 kvm。我创建了五个 kvm。其中一个的 CPU 有问题。有时 top 看起来像这样： 顶部图片
ps aux 显示一个使用了所有可用核心 100％ 的进程：
root 24407 396 14.6 2942304 2405368 ? Tl 05:16 1206:08 ./systemd
kvm guest 的 CPU 使用率达到 100% 是什么原因？
编辑：
KVM 客户机（4 核可用）
top - 20:23:26 up 3 days, 8:52, 1 user, load average: 3.74, 3.98, 3.99
Tasks: 173 total, 3 running, 169 sleeping, 1 stopped, 0 zombie
%Cpu(s): 2.8 us, 2.7 sy, 0.0 ni, 92.2 id, 0.1 wa, 0.0 hi, 1.6 si, 0.6 st
MiB Mem : 16042.4 total, 9542.3 free, 4493.9 used, 2006.3 buff/cache
MiB Swap: 3069.0 total, 3069.0 free, 0.0 used. 11206.7 avail Mem
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
719 systemd+ 20 0 5441096 1.3g 24428 S 2.0 8.5 68:18.52 mysqld
909 systemd+ 20 0 38164 12144 3944 S 2.0 0.1 28:36.97 redis-server
1224 systemd+ 20 0 7772 3680 1216 S 1.7 0.0 19:35.42 nginx
442 root 20 0 1959824 100084 43752 S 1.3 0.6 20:05.33 dockerd
481 root 20 0 1690120 40816 24216 S 0.7 0.2 8:32.02 docker-containe
root 5863 395 14.6 2942304 2405580 ? Tl 17:31 683:31 ./systemd
主机
top - 20:25:09 up 17 days, 11:38, 1 user, load average: 2.96, 3.73, 4.12
Tasks: 153 total, 1 running, 152 sleeping, 0 stopped, 0 zombie
%Cpu(s): 52.3 us, 0.8 sy, 0.0 ni, 46.9 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st
MiB Mem : 64209.1 total, 4465.2 free, 20466.1 used, 39277.9 buff/cache
MiB Swap: 32735.0 total, 19767.7 free, 12967.2 used. 43033.6 avail Mem
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
31747 libvirt+ 20 0 18.8g 5.8g 3008 S 397.7 9.2 17446:07 qemu-system-x86
libvirt+ 31747 358 9.2 19674620 6052068 ? Sl Sep18 17450:33 /usr/bin/qemu-system-x86_64 -name guest=knights_s2,debug-threads=on -S -object secret,id=masterKey0,format=raw,file=/var/l7-knights_s2/master-key.aes -machine pc-q35-3.1,accel=kvm,usb=off,dump-guest-core=off -cpu Skylake-Client-IBRS,ss=on,hypervisor=on,tsc_adjust=on,clflushopt=on,umip=on,md-clear=on,ssbd=on,xs6384 -realtime mlock=off -smp 4,sockets=4,cores=1,threads=1 -uuid c0d6ab01-563c-4487-b9ce-9b4a36313a40 -no-user-config -nodefaults -chardev socket,id=charmonitor,fd=27,server,nowait -mon chnitor,mode=control -rtc base=utc,driftfix=slew -global kvm-pit.lost_tick_policy=delay -no-hpet -no-shutdown -global ICH9-LPC.disable_s3=1 -global ICH9-LPC.disable_s4=1 -boot strict=on -devi0x10,chassis=1,id=pci.1,bus=pcie.0,multifunction=on,addr=0x2 -device pcie-root-port,port=0x11,chassis=2,id=pci.2,bus=pcie.0,addr=0x2.0x1 -device pcie-root-port,port=0x12,chassis=3,id=pci.3, -device pcie-root-port,port=0x13,chassis=4,id=pci.4,bus=pcie.0,addr=0x2.0x3 -device pcie-root-port,port=0x14,chassis=5,id=pci.5,bus=pcie.0,addr=0x2.0x4 -device pcie-root-port,port=0x15,chae.0,addr=0x2.0x5 -device pcie-root-port,port=0x16,chassis=7,id=pci.7,bus=pcie.0,addr=0x2.0x6 -device qemu-xhci,p2=15,p3=15,id=usb,bus=pci.2,addr=0x0 -device virtio-serial-pci,id=virtio-seri-drive file=/kvm/disk/knights_s2.img,format=qcow2,if=none,id=drive-virtio-disk0 -device virtio-blk-pci,scsi=off,bus=pci.4,addr=0x0,drive=drive-virtio-disk0,id=virtio-disk0,bootindex=2 -driv0-0-0,media=cdrom,readonly=on -device ide-cd,bus=ide.0,drive=drive-sata0-0-0,id=sata0-0-0,bootindex=1 -netdev tap,fd=32,id=hostnet0,vhost=on,vhostfd=33 -device virtio-net-pci,netdev=hostnet6a:98:5f,bus=pci.1,addr=0x0 -chardev pty,id=charserial0 -device isa-serial,chardev=charserial0,id=serial0 -chardev socket,id=charchannel0,fd=34,server,nowait -device virtserialport,bus=virtev=charchannel0,id=channel0,name=org.qemu.guest_agent.0 -device usb-tablet,id=input0,bus=usb.0,port=1 -vnc 0.0.0.0:2 -device qxl-vga,id=video0,ram_size=67108864,vram_size=67108864,vram64_six_outputs=1,bus=pcie.0,addr=0x1 -device virtio-balloon-pci,id=balloon0,bus=pci.5,addr=0x0 -object rng-random,id=objrng0,filename=/dev/urandom -device virtio-rng-pci,rng=objrng0,id=rng0,bus= on,obsolete=deny,elevateprivileges=deny,spawn=deny,resourcecontrol=deny -msg timestamp=on
汤姆