On 31 March 2014 16:18, Michal Privoznik <mprivozn@redhat.com> wrote:

On 30.03.2014 14:46, Pradeep Kiruvale wrote:

Hi All,

  I am new to QEMU/libvirt

   I was starting to learn the libvirt code,I was browsing  the code how
the guest network bandwidth to be set like we mention <inbound> <outbound>
tags in the xml,but where in code exactly these values set to the guest
interface.

I browsed the code a lot could not find it.Please help to understand how
this works.

The bandwidth is set in virNetDevBandwidthSet() function:

http://libvirt.org/git/?p=libvirt.git;a=blob;f=src/util/virnetdevbandwidth.c;h=b06ed4c63c1e64736718b880b1821d745d7f31c2;hb=HEAD#l60

The basic idea is to call /sbin/tc a few times with the correct arguments (the path to the binary may change through different systems).

Michal