Hello Don, xen_emul_unplug=unnecessary does the trick, I am able to see the vmxnet3 driver using lspci and ethtool -I eth0. Thanks a lot for your help, much appreciated.
Performance between vmxnet3 running on XEN is about 1/3 of vmxnet3 running on ESXi. Similar performance number I get between vmxnet3 on ESXi and vif on XEN. Do you know what could be the reason for this? Thanks, -Upanshu From: Don Slutz [mailto:dsl...@verizon.com] Sent: Saturday, December 20, 2014 3:59 AM To: Singhal, Upanshu Cc: xen-devel@lists.xen.org Subject: Re: [Xen-devel] Help: VMXNET3 support with XEN 4.4.1 xen_emul_unplug=unnecessary (kernel arg) may help you here. Also udev likes to rename your devices. Here is a lspci from a guest: [root@C63-min-tools ~]# lspci 00:00.0 Host bridge: Intel Corporation 440FX - 82441FX PMC [Natoma] (rev 02) 00:01.0 ISA bridge: Intel Corporation 82371SB PIIX3 ISA [Natoma/Triton II] 00:01.1 IDE interface: Intel Corporation 82371SB PIIX3 IDE [Natoma/Triton II] 00:01.3 Bridge: Intel Corporation 82371AB/EB/MB PIIX4 ACPI (rev 03) 00:02.0 Unassigned class [ff80]: XenSource, Inc. Xen Platform Device (rev 01) 00:03.0 VGA compatible controller: Cirrus Logic GD 5446 00:04.0 Ethernet controller: VMware VMXNET3 Ethernet Controller (rev 01) 00:05.0 Ethernet controller: Intel Corporation 82540EM Gigabit Ethernet Controller (rev 03) 00:06.0 Ethernet controller: VMware VMXNET3 Ethernet Controller (rev 01) 00:07.0 Ethernet controller: VMware VMXNET3 Ethernet Controller (rev 01) 00:08.0 Ethernet controller: VMware VMXNET3 Ethernet Controller (rev 01) 00:09.0 Ethernet controller: VMware VMXNET3 Ethernet Controller (rev 01) 00:0a.0 Ethernet controller: VMware VMXNET3 Ethernet Controller (rev 01) 00:0b.0 Ethernet controller: VMware VMXNET3 Ethernet Controller (rev 01) 00:0c.0 Ethernet controller: VMware VMXNET3 Ethernet Controller (rev 01) 00:0d.0 Ethernet controller: Intel Corporation 82540EM Gigabit Ethernet Controller (rev 03) And to help: [root@C63-min-tools ~]# ls -l /sys/class/net/*/device lrwxrwxrwx. 1 root root 0 Dec 19 17:23 /sys/class/net/eth0/device -> ../../../vif-0 lrwxrwxrwx. 1 root root 0 Dec 19 17:23 /sys/class/net/eth1/device -> ../../../vif-1 lrwxrwxrwx. 1 root root 0 Dec 19 17:23 /sys/class/net/eth2/device -> ../../../vif-2 lrwxrwxrwx. 1 root root 0 Dec 19 17:23 /sys/class/net/eth3/device -> ../../../vif-3 lrwxrwxrwx. 1 root root 0 Dec 19 17:23 /sys/class/net/eth4/device -> ../../../vif-4 lrwxrwxrwx. 1 root root 0 Dec 19 17:23 /sys/class/net/eth5/device -> ../../../vif-5 lrwxrwxrwx. 1 root root 0 Dec 19 17:23 /sys/class/net/eth6/device -> ../../../vif-6 lrwxrwxrwx. 1 root root 0 Dec 19 17:23 /sys/class/net/eth7/device -> ../../../vif-7 lrwxrwxrwx. 1 root root 0 Dec 19 17:23 /sys/class/net/eth8/device -> ../../../vif-8 lrwxrwxrwx. 1 root root 0 Dec 19 17:23 /sys/class/net/eth9/device -> ../../../vif-9 lrwxrwxrwx. 1 root root 0 Dec 19 17:21 /sys/class/net/pci-nic0/device -> ../../../0000:00:04.0 lrwxrwxrwx. 1 root root 0 Dec 19 17:21 /sys/class/net/pci-nic1/device -> ../../../0000:00:05.0 lrwxrwxrwx. 1 root root 0 Dec 19 17:21 /sys/class/net/pci-nic2/device -> ../../../0000:00:06.0 lrwxrwxrwx. 1 root root 0 Dec 19 17:21 /sys/class/net/pci-nic3/device -> ../../../0000:00:07.0 lrwxrwxrwx. 1 root root 0 Dec 19 17:21 /sys/class/net/pci-nic4/device -> ../../../0000:00:08.0 lrwxrwxrwx. 1 root root 0 Dec 19 17:21 /sys/class/net/pci-nic5/device -> ../../../0000:00:09.0 lrwxrwxrwx. 1 root root 0 Dec 19 17:21 /sys/class/net/pci-nic6/device -> ../../../0000:00:0a.0 lrwxrwxrwx. 1 root root 0 Dec 19 17:21 /sys/class/net/pci-nic7/device -> ../../../0000:00:0b.0 lrwxrwxrwx. 1 root root 0 Dec 19 17:21 /sys/class/net/pci-nic8/device -> ../../../0000:00:0c.0 lrwxrwxrwx. 1 root root 0 Dec 19 17:21 /sys/class/net/pci-nic9/device -> ../../../0000:00:0d.0 -Don Slutz On 12/19/14 07:04, Singhal, Upanshu wrote: Hello, In one of my experiment, I am building a Linux VM with Network interface model as "vmxnet3". I am able to create the VM successfully, but I see that the driver loaded is "vif" and not "vmxnet3". I am using the following option for the network interface: vif = [ 'type=ioemu, mac=00:16:3e:00:00:22, bridge=xenbr0, model=vmxnet3' ] I tried with model as e1000 and it works fine. Lspci command also does not show vmxnet3. Though, qemu device help shows that "vmxnet3" is supported on XEN 4.4.1 version I am using. I tried searching on internet about the right configuration for vmxnet3 with XEN, but not able to find right information. Can someone please help me on how to create a VM with vmxnet3? This experiment I am doing to compare the difference between vmxnet3 bandwidth on VMWARE ESXi vs. XEN Server. My sample VM configuration file is: # This configures an HVM rather than PV guest builder = "hvm" # Guest name name = "rhel-vmxnet3-xen-2.hvm" # 128-bit UUID for the domain as a hexadecimal number. # Use "uuidgen" to generate one if required. # The default behavior is to generate a new UUID each time the guest is started. #uuid = "XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX" # Enable Microsoft Hyper-V compatibile paravirtualisation / # enlightenment interfaces. Turning this on can improve Windows guest # performance and is therefore recommended #viridian = 1 # Initial memory allocation (MB) memory = 8192 # Maximum memory (MB) # If this is greater than `memory' then the slack will start ballooned # (this assumes guest kernel support for ballooning) #maxmem = 512 # Number of VCPUS vcpus = 8 # Network devices # A list of 'vifspec' entries as described in # docs/misc/xl-network-configuration.markdown vif = [ 'type=ioemu, mac=00:16:3e:00:00:22, bridge=xenbr1, model=vmxnet3' ] # Disk Devices # A list of `diskspec' entries as described in # docs/misc/xl-disk-configuration.txt disk = [ '/root/rhel_6_4/rhel-vmxnet3-xen-2.img,raw,xvda,rw', 'file:/root/rhel-server-6.4-x86_64-dvd.iso,hdc:cdrom,r<file:///\\root\rhel-server-6.4-x86_64-dvd.iso,hdc:cdrom,r>' ] boot='cd' # Guest VGA console configuration, either SDL or VNC # sdl = 1 vnc = 2 Thanks, -Upanshu Upanshu Singhal EMC Data Storage Systems, Bangalore, India. 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