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[Qemu-devel] Despite of traffic control on host netdevice, is it worth t
From: |
Liu ping fan |
Subject: |
[Qemu-devel] Despite of traffic control on host netdevice, is it worth to impose a limit control on qemu emulated net device? |
Date: |
Thu, 5 Apr 2012 10:30:33 +0800 |
Hi,
As we know, in order to control the guest OS's TX rate limit, we can
apply rate limit on ingress Qdisc of host's tap device.
But I think skb will be dropped on host's tap ingress Qdisc, which
means that for those protocol lacking of congestion control such as
UDP, it will cost a lot of meaningless time to produce dropped packet
.
What about introducing rate limit on qemu's emulated net device? I
think guest's UDP transaction will be blocked at wait_for_wmem.
Thanks and regards,
pingfan
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