Fw: Re: [Xen-users] bridge throughput problem

[Fasiha Ashraf <feehapk@xxxxxxxxxxx>]

I have tried what you suggested me. I pinned 1 core per guest also pin 1 core to Dom0 instead of allowing dom0 to use all 8 cores. But the results remained same.
Below are the details:-
[root@HPCNL-SR-2 ~]# xm vcpu-list
Name                                ID  VCPU   CPU State   Time(s) CPU Affinity
Domain-0                             0     0     0   r--      69.4 any cpu
Domain-0                             0     1     -   --p       4.7 any cpu
Domain-0                             0     2     -   --p       6.2 any cpu
Domain-0                             0     3     -   --p       5.5 any cpu
Domain-0                             0     4     -   --p       4.7 any cpu
Domain-0                             0     5     -   --p       3.5 any cpu
Domain-0                             0     6     -   --p       3.8 any cpu
Domain-0                             0     7     -   --p       3.5 any cpu
F11-G1S2                                   0                   0.0 any cpu
F11-G2S2                             1     0     1   -b-      14.7 1
F11-G3S2                             2     0     2   -b-      14.9 2
F11-G4S2                                   0                   0.0 any cpu

[root@F11-G2S2 ~]# netserver
Starting netserver at port 12865
Starting netserver at hostname 0.0.0.0 port 12865 and family AF_UNSPEC

[root@F11-G3S2 ~]# netperf -l 60 -H 10.11.21.212
TCP STREAM TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to 10.11.21.212 (10.11.21.212) port 0 AF_INET
Recv   Send    Send                         
Socket Socket  Message  Elapsed             
Size   Size    Size     Time     Throughput 
bytes  bytes   bytes    secs.    10^6bits/sec 

 87380  16384  16384    60.05       0.29  

There is something strange that I have observed in my set-up, when i traceroute guest it doesn't reach any destination. do not get reply from nay hope.
 
[root@F11-G3S2 ~]# traceroute 10.11.21.212
traceroute to 10.11.21.212 (10.11.21.212), 30 hops max, 60 byte packets
 1  * * *
 2  * * *
 3  * * *
 4  * * *
 5  * * *
 6  *^C
it displays the same stars till 30. normally it doesn't happen. It should be something like
 [root@F11-G3S2 ~]# traceroute 10.11.21.32
traceroute to 10.11.21.32 (10.11.21.32), 30 hops max, 60 byte packets
 1  10.11.21.32 (10.11.21.32)  0.740 ms  0.710 ms  0.674 ms

I feel there is some network configuration issue. would Please guide me how to find out the route cause and to resolve the problem.
How can i check ICMP thing in  my fedora11 system?

Regards,
Fasiha Ashraf

--- On Sat, 5/9/09, Fajar A. Nugraha <fajar@xxxxxxxxx> wrote:

From: Fajar A. Nugraha <fajar@xxxxxxxxx>
Subject: Re: [Xen-users] bridge throughput problem
To: "Fasiha Ashraf" <feehapk@xxxxxxxxxxx>
Cc: xen-users@xxxxxxxxxxxxxxxxxxx
Date: Saturday, 5 September, 2009, 4:59 PM

On Sat, Sep 5, 2009 at 12:06 PM, Fasiha Ashraf<feehapk@xxxxxxxxxxx> wrote:
> What is Guest1 and Guest2?
> These are PV domUs of Fedora11(32bit).
> Is it on the same dom0 or on different dom0?
> Yes, they are on the same host on same physical machine.

Perhaps it's CPU/interrupt issue. Can you make sure that dom0, guest1,
and guest2 ONLY use 1 vcpu each, and they're located on DIFFERENT
physical cpu/core (xm vcpu-set, xm vcpu-pin), and repeat the test.

Also, have another window running for each dom0/domU, and observe CPU
load during that test with "top". Which domain uses 100%? Is it user
or system?

--
Fajar

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