Subject: Re: How do I stop a high guest CPU load and ifb0 from dropping internet packets?
From: Fog_Watch <db5@exemail.com.au>
Date: Wed, 14 Aug 2013 15:31:44 +1000

On Mon, 5 Aug 2013 14:52:07 +1000
Fog_Watch <db5@exemail.com.au> wrote:

> What changes are needed to prevent a high guest CPU load, when
> combined with an IFB ingress interface, from dropping packets?

Since the last post I've successfully used cpuset to distribute my cores
so that, I think, my host has one entirely to itself:
cset: 
         Name       CPUs-X    MEMs-X Tasks Subs Path
 ------------ ---------- - ------- - ----- ---- ----------
         root        0-7 y       0 y   175    4 /
           as        1-4 n       0 n    61    0 /as
          kdc          7 n       0 n     2    0 /kdc
         voip          5 n       0 n    70    0 /voip
           hf          6 n       0 n    32    0 /hf

The problem remains.

When ingress traverses an IFB, with a high host CPU load, packets are
not dropped, but when a guest CPU load is high packets are dropped.  How
do I prevent my guest-related packet drops?

Regards

Fog_Watch
-- 
"A. Because it breaks the logical order of conversation.
 Q. Why is top posting bad?"