[coLinux-users] Network performance between coLinix instaces

[Taisuke Y. <tya...@li...>]

Hi.

I've set up 2 coLinux instances with NFS client-server
configuration to save diskspace, but performance is way
slower than I expected.

To quantify my experience, I dis some benchmarking with
netperf. In following data, "co00" is the NFS server
and "co01" is the client. They both use TAP driver bridged
by Windows "Network Bridge" for network connection.

  co00:/root# netperf
  TCP STREAM TEST to localhost
  Recv   Send    Send
  Socket Socket  Message  Elapsed
  Size   Size    Size     Time     Throughput
  bytes  bytes   bytes    secs.    10^6bits/sec
  
   87380  16384  16384    10.00    8599.03
  co00:/root#

  co01:/root# netperf -H 192.168.100.100
  TCP STREAM TEST to 192.168.100.100
  Recv   Send    Send
  Socket Socket  Message  Elapsed
  Size   Size    Size     Time     Throughput
  bytes  bytes   bytes    secs.    10^6bits/sec
  
   87380  16384  16384    10.02      23.39
  co01:/root#

As you can see, TCP thoughput between 2 colinux instances
is about 400 times slower than loopback.

Is this a current limitation, or am I doing something wrong?
Since there's no physical device between these two, I'm
wondering if there's any coLinux parameter to increase
network performance.

Thanks in advance.

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Taisuke Yamada <<tya...@sp...>>

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