poor network performance in hyper-v

i have not network performance host (windows server 2008 r2 sp1) to guest vm (windows 7 sp1)

i created 'internal' network card communication, problem independt from network hardware.

testing performance ntttcps host guest obtain 548 mbps:

c:\utils>ntttcps.exe -m 1,0,192.168.21.100 -a 2
copyright version 3.0
network activity progressing...

thread realtime(s) throughput(kb/s) throughput(mbit/s) avg bytes per completion
====== =========== ================ ================== ========================

     0      19.594       68499.402            547.995                65529.601

total bytes(meg) realtime(s) average frame size total throughput(mbit/s)
================ =========== ================== ========================

     1342.177280      19.594           1456.109                  547.995

total buffers throughput(buffers/s) pkts(sent/intr) intr(count/s) cycles/byte
============= ===================== =============== ============= ===========

    20480.000              1045.218              14       3205.32        10.2

packets sent packets received total retransmits total errors avg. cpu %
============ ================ ================= ============ ==========

      921756           461884                 0            0       1.09

 

and vm host have 1726 mbps:

c:\users\p.filipowicz>\\192.168.21.2\c$\utils\ntttcps.exe -m 2,0,192.168.21.2 -a
 2
copyright version 3.0
network activity progressing...

thread realtime(s) throughput(kb/s) throughput(mbit/s) avg bytes per completion
====== =========== ================ ================== ========================

     0       6.217       215782.841           1726.263                65529.597
     1       6.217       215888.255           1727.106                65529.601

total bytes(meg) realtime(s) average frame size total throughput(mbit/s)
================ =========== ================== ========================

     2683.699200       6.217           1456.283                 3453.369

total buffers throughput(buffers/s) pkts(sent/intr) intr(count/s) cycles/byte
============= ===================== =============== ============= ===========

    40950.000              6586.778              33       8838.67         1.7

packets sent packets received total retransmits total errors avg. cpu %
============ ================ ================= ============ ==========

     1842842            78118                 0            0       6.72

 

speed of 548 mbps unsatisfactory me, 10gbps virtual card , recent hardware use.

i have tried find solution no success. ideas? please help

piotr filipowicz

 

if read - copying between management os , vm running on same machine.

you unsatisfied network throughput.

first of - vm , managmenet os have physically different storage?  reads 1 don't impact writes of other - can have negative impact on file copying appears network issue isn't.

another disabling tcp task offloading.

another installing ics in win 7 vm - becuase "it works" not mean perfect.

have compared virtual legacy network adapters network adapters in vm.

have compared vm on seperate hypervisor? or copying different physical machine?

i guess not sure expectation is.  imho bigeest limiting factor protocol use , os running.  windows designed never flood nic - , won't.  have seen backup agents saturate nic on windows system.  smb factor, protocol simply not allow saturation.  linux, on other hand, can easliy , saturate nics - has no built in throttling.

so, share more doing , why think problem , maybe can more helpful to your specific situation.

 

 

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brian ehlert (hopefully have found useful) http://itproctology.blogspot.com

Windows Server  >  Hyper-V