Re: HVM dropped packets

["Pasi Kärkkäinen" <pasik@iki.fi>]

On Tue, Aug 25, 2009 at 01:30:34PM -0500, Nathan Stratton wrote:
> 
> I am having no issues with para guests, but HVM guests all show dropped 
> packets.
> 

Try changing the Qemu emulated NIC to Intel e1000. Maybe that helps with the
performance.

Or then use PV drivers in the guest.

-- Pasi

> I am runing Xen 3.4.1 on linux 2.6.31-rc6, but also have tried older xen 
> and kernels.
> 
> Also, not sure why I have a vif and a tap for my HVM guests, only have vif 
> for para.
> 
> [root@xen1 config]# ifconfig tap19.0
> tap19.0   Link encap:Ethernet  HWaddr B6:B7:E1:71:09:3C
>           inet6 addr: fe80::b4b7:e1ff:fe71:93c/64 Scope:Link
>           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
>           RX packets:34507 errors:0 dropped:0 overruns:0 frame:0
>           TX packets:43841 errors:0 dropped:0 overruns:645 carrier:0
>           collisions:0 txqueuelen:500
>           RX bytes:16847714 (16.0 MiB)  TX bytes:22711872 (21.6 MiB)
> 
> [root@xen1 config]# ifconfig tap19.1
> tap19.1   Link encap:Ethernet  HWaddr 76:C7:74:AF:CA:EC
>           inet6 addr: fe80::74c7:74ff:feaf:caec/64 Scope:Link
>           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
>           RX packets:36601 errors:0 dropped:0 overruns:0 frame:0
>           TX packets:36018 errors:0 dropped:0 overruns:457 carrier:0
>           collisions:0 txqueuelen:500
>           RX bytes:18152679 (17.3 MiB)  TX bytes:17744980 (16.9 MiB)
> 
> [root@xen1 config]# ifconfig vif19.0
> vif19.0   Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF
>           inet6 addr: fe80::fcff:ffff:feff:ffff/64 Scope:Link
>           UP BROADCAST RUNNING PROMISC MULTICAST  MTU:1500  Metric:1
>           RX packets:0 errors:0 dropped:0 overruns:0 frame:0
>           TX packets:0 errors:0 dropped:2908 overruns:0 carrier:0
>           collisions:0 txqueuelen:32
>           RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)
> 
> [root@xen1 config]# ifconfig vif19.1
> vif19.1   Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF
>           inet6 addr: fe80::fcff:ffff:feff:ffff/64 Scope:Link
>           UP BROADCAST RUNNING PROMISC MULTICAST  MTU:1500  Metric:1
>           RX packets:0 errors:0 dropped:0 overruns:0 frame:0
>           TX packets:0 errors:0 dropped:181 overruns:0 carrier:0
>           collisions:0 txqueuelen:32
>           RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)
> 
> 
> [root@xen1 config]# more proxy0.hou-para
> import os, re
> arch = os.uname()[4]
> if re.search('64', arch):
>     arch_libdir = 'lib64'
> else:
>     arch_libdir = 'lib'
> 
> kernel = "/usr/lib/xen/boot/hvmloader"
> 
> builder='hvm'
> 
> name = "proxy0.hou"
> memory = 2048
> vcpus=4
> 
> disk   = [ 'file:/share/xen/images/proxy0.hou.img,xvda,w', ]
> vif    = [ 'mac=00:11:25:00:1E:01, type=ioemu, bridge=private',
>            'mac=00:11:25:00:1E:02, type=ioemu, bridge=public' ]
> 
> uuid   = '00000014-1111-2222-3333-200809231904'
> 
> device_model = '/usr/' + arch_libdir + '/xen/bin/qemu-dm'
> 
> sdl=0
> opengl=1
> vnc=1
> vncpasswd=''
> stdvga=0
> serial='pty'
> 
> 
> 
> ><>
> Nathan Stratton                                CTO, BlinkMind, Inc.
> nathan at robotics.net                         nathan at blinkmind.com
> http://www.robotics.net                        http://www.blinkmind.com
> 
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