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List:       openvswitch-discuss
Subject:    [ovs-discuss] Does ovs use tc?
From:       cvinllen () gmail ! com (Vinllen Chen)
Date:       2014-08-21 3:11:00
Message-ID: 53F56344.9080303 () gmail ! com
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Hello everyone,
     I use the tc and ovs to controll my traffic, and I find they can 
all controll the traffic, but I want to compare the "CPU power 
consumption", so I use the "top" command. As a result , here is my 
comparison:

tc in eth0, 30mbits  bandwidth:

PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND

6331 libvirt+ 20 0 4523196 297560 9444 S *13.1 *2.5 0:30.90 qemu-system-x86

**

*ovs-vsctl in openvswitch*, 30mbits bandwidth:

PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND

6442 libvirt+ 20 0 4528428 299548 9444 S *3.4 *2.5 1:17.71 qemu-system-x86


The result is tc consume about 10% while ovs only have 3%, I repeated 
the test several times, and the results are very similar. Does anybody 
know the reason?

-- 
name: Vinllen Chen
mail: cvinllen at gmail.com
home: Beijing, China
school: Beijing Normal University

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