/usr/libexec/qemu-kvm \
-name guest=virtual-machines_qa-py-mtl-node8,debug-threads=on \
-S \
-blockdev '{"driver":"file","filename":"/usr/share/OVMF/OVMF_CODE.secboot.fd","node-name":"libvirt-pflash0-storage","auto-read-only":true,"discard":"unmap"}' \
-blockdev '{"node-name":"libvirt-pflash0-format","read-only":true,"driver":"raw","file":"libvirt-pflash0-storage"}' \
-blockdev '{"driver":"file","filename":"/root/avocado/data/avocado-vt/avocado-vt-vm1_win10-64-virtio-ovmf_raw_filesystem_VARS.raw","node-name":"libvirt-pflash1-storage","auto-read-only":true,"discard":"unmap"}' \
-blockdev '{"node-name":"libvirt-pflash1-format","read-only":false,"driver":"raw","file":"libvirt-pflash1-storage"}' \
-machine pc-q35-rhel9.4.0,usb=off,smm=on,dump-guest-core=off,pflash0=libvirt-pflash0-format,pflash1=libvirt-pflash1-format,acpi=on \
-accel kvm \
-cpu EPYC-Genoa,x2apic=on,tsc-deadline=on,hypervisor=on,tsc-adjust=on,spec-ctrl=on,stibp=on,flush-l1d=on,arch-capabilities=on,ssbd=on,cmp-legacy=on,virt-ssbd=on,lbrv=on,tsc-scale=on,vmcb-clean=on,pause-filter=on,pfthreshold=on,v-vmsave-vmload=on,vgif=on,rdctl-no=on,skip-l1dfl-vmentry=on,mds-no=on,pschange-mc-no=on,gds-no=on,hv-time=on,tsc-frequency=3245122000,hv-relaxed=on,hv-vapic=on,hv-spinlocks=0x1fff,hv-vpindex=on,hv-runtime=on,hv-synic=on,hv-stimer=on,hv-stimer-direct=on,hv-reset=on,hv-frequencies=on,hv-reenlightenment=on,hv-tlbflush=on,hv-ipi=on \
-m size=67108864k,maxmem=268435456k \
-overcommit mem-lock=off \
-smp 24,sockets=1,dies=1,clusters=1,cores=24,threads=1 \
-object '{"qom-type":"iothread","id":"iothread1"}' \
-object '{"qom-type":"memory-backend-ram","id":"ram-node0","size":68719476736}' \
-numa node,nodeid=0,cpus=0-23,memdev=ram-node0 \
-uuid 326840b3-949d-5617-8ce2-779a46a12a0d \
-smbios 'type=1,manufacturer=Red Hat,product=OpenShift Virtualization,version=4.18.13,uuid=326840b3-949d-5617-8ce2-779a46a12a0d,sku=4.18.13,family=Red Hat' \
-no-user-config \
-nodefaults \
-rtc base=utc \
-global kvm-pit.lost_tick_policy=delay \
-boot strict=on \
-device '{"driver":"pcie-root-port","port":16,"chassis":1,"id":"pci.1","bus":"pcie.0","multifunction":true,"addr":"0x2"}' \
-device '{"driver":"pcie-root-port","port":17,"chassis":2,"id":"pci.2","bus":"pcie.0","addr":"0x2.0x1"}' \
-device '{"driver":"pcie-root-port","port":18,"chassis":3,"id":"pci.3","bus":"pcie.0","addr":"0x2.0x2"}' \
-device '{"driver":"pcie-root-port","port":19,"chassis":4,"id":"pci.4","bus":"pcie.0","addr":"0x2.0x3"}' \
-device '{"driver":"pcie-root-port","port":20,"chassis":5,"id":"pci.5","bus":"pcie.0","addr":"0x2.0x4"}' \
-device '{"driver":"pcie-root-port","port":21,"chassis":6,"id":"pci.6","bus":"pcie.0","addr":"0x2.0x5"}' \
-device '{"driver":"pcie-root-port","port":22,"chassis":7,"id":"pci.7","bus":"pcie.0","addr":"0x2.0x6"}' \
-device '{"driver":"pcie-root-port","port":23,"chassis":8,"id":"pci.8","bus":"pcie.0","addr":"0x2.0x7"}' \
-device '{"driver":"pcie-root-port","port":24,"chassis":9,"id":"pci.9","bus":"pcie.0","multifunction":true,"addr":"0x3"}' \
-device '{"driver":"pcie-root-port","port":25,"chassis":10,"id":"pci.10","bus":"pcie.0","addr":"0x3.0x1"}' \
-device '{"driver":"pcie-root-port","port":26,"chassis":11,"id":"pci.11","bus":"pcie.0","addr":"0x3.0x2"}' \
-device '{"driver":"virtio-scsi-pci-non-transitional","id":"scsi0","bus":"pci.5","addr":"0x0"}' \
-device '{"driver":"virtio-serial-pci-non-transitional","id":"virtio-serial0","bus":"pci.6","addr":"0x0"}' \
-blockdev '{"driver":"file","filename":"/home/timao/bsod/share/win10-64-virtio-ovmf.raw","node-name":"libvirt-2-storage","auto-read-only":true,"discard":"unmap","cache":{"direct":true,"no-flush":false}}' \
-blockdev '{"node-name":"libvirt-2-format","read-only":false,"discard":"unmap","cache":{"direct":true,"no-flush":false},"driver":"raw","file":"libvirt-2-storage"}' \
-device '{"driver":"virtio-blk-pci-non-transitional","bus":"pci.7","addr":"0x0","drive":"libvirt-2-format","id":"ua-rootdisk","bootindex":1,"write-cache":"on","werror":"report","rerror":"report"}' \
\
-blockdev '{"node-name": "drive_winutils", "driver": "file", "read-only": true, "discard": "unmap", "aio": "threads", "filename": "/home/kvm_autotest_root/iso/windows/winutils.iso", "cache": {"direct": true, "no-flush": false}}' \
-device '{"driver": "ide-cd", "id": "winutils", "drive": "drive_winutils", "write-cache": "on", "bus": "ide.1", "unit": 0}' \
-device '{"driver": "virtio-net-pci", "mac": "9a:91:56:6c:8c:e7", "id": "idI1tvEI", "netdev": "idsgNetH", "bus": "pci.8", "addr": "0x0"}' \
-netdev  '{"id": "idsgNetH", "type": "tap", "vhost": true}' \
-vnc :0 \
-device '{"driver":"bochs-display","id":"video0","vgamem":16777216,"bus":"pcie.0","addr":"0x1"}' \
-global ICH9-LPC.noreboot=off \
-watchdog-action reset \
-device '{"driver":"virtio-balloon-pci-non-transitional","id":"balloon0","free-page-reporting":true,"bus":"pci.9","addr":"0x0"}' \
-object '{"qom-type":"rng-random","id":"objrng0","filename":"/dev/urandom"}' \
-device '{"driver":"virtio-rng-pci-non-transitional","rng":"objrng0","id":"rng0","bus":"pci.10","addr":"0x0"}' \
-sandbox on,obsolete=deny,elevateprivileges=deny,obsolete=deny,resourcecontrol=deny \
-msg timestamp=on \
-monitor stdio

# diskspd.exe -d36000 -w50 -r -t16 -o64 -b4k C:\test\io.dat

[root@dell-per660-02 bsod]# cat nfstest.sh 
nfs_disable() {
  local host=$1
  [ "$host" == "" ] && host=$nfs_host
  # DROP AND REJECT both good
  #cmd="iptables -A OUTPUT -d $host -p tcp --dport 2049 -j DROP"
  
  cmd="iptables -A OUTPUT -d $host -p tcp --dport 2049 -j REJECT"
  echo "$cmd"
  $cmd
}nfs_enable() {
  local host=$1
  [ "$host" == "" ] && host=$nfs_host
  #cmd="iptables -D OUTPUT -d $host -p tcp --dport 2049 -j DROP"
  cmd="iptables -D OUTPUT -d $host -p tcp --dport 2049 -j REJECT"
  echo "$cmd"
  $cmd
}
nfs_switch() {
  #usage nfs_switch timeout
  local i n
  [ "$1" == "" ] && n=9 || n=$1
  echo $n
  nfs_disable
  date
  iptables -L OUTPUT
  for i in $(seq $n); do
    echo -n "$i: "$(date "+%H:%M:%S")" ... "
    sleep 10
    echo $(date "+%H:%M:%S")
  done
  #sleep 90
  date
  nfs_enable
  iptables -L OUTPUT
}nfs_switch "$@"
[root@dell-per660-02 bsod]# sh nfstest.sh 10