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[Xen-users] udp packet loss

  • To: xen-users@xxxxxxxxxxxxxxxxxxx
  • From: Hongbo Zhu <hongbo_zhu@xxxxxxxxx>
  • Date: Fri, 24 Oct 2008 17:31:15 -0700 (PDT)
  • Delivery-date: Fri, 24 Oct 2008 17:31:55 -0700
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  • List-id: Xen user discussion <xen-users.lists.xensource.com>
I was sending 5000 syslog messages per second to a virtual machine running on a CentOS 5.2 host, I have a program running on the virtual machine that receives and processes the syslog messages. What I observed is that there is about 30% packets dropped by the dom0 peth0 interface. During the test period, the CPU usage on the virtual machine is about 30-40%. I already did : echo 256 > /sys/class/net/eth0/rxbuf_min on the domU.

Does anyone know how this happen?

Thanks,

Hongbo

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