Drop in Network Performance when Reading from a Bare Metal Platform to a DomU

(Doc ID 1316948.1)

Last updated on AUGUST 03, 2016

Applies to:

Oracle VM - Version 2.2.1 to 2.2.2 [Release OVM221 to OVM222]
Linux x86-64

Symptoms

Significant drop in network performance when reading from a BareMetal Platform to a DomU (virtual Machine).

This can be tested/confirmed  by running iperf,  to learn and get iperf refer to Knowledge Document 1507397.1

# iperf -c {IPerf SERVER HOSTNAME} -t 60 -d

For example:

[root@localhost ~]# iperf -c 131.xxx.xx.43 -t 60 -d
------------------------------------------------------------
Server listening on TCP port 5001
TCP window size: 85.3 KByte (default)
------------------------------------------------------------
------------------------------------------------------------
Client connecting to 131.xxx.xx.xx, TCP port 5001
TCP window size: 16.0 KByte (default)
------------------------------------------------------------
[ 5] local 131.225.67.59 port 44923 connected with 131.xxx.xx.xx port 5001
[ 4] local 131.225.67.59 port 5001 connected with 131.xxx.xx.xx port 42140
[ ID] Interval Transfer Bandwidth
[ 5] 0.0-60.0 sec 6.58 GBytes 941 Mbits/sec
[ ID] Interval Transfer Bandwidth
[ 4] 0.0-60.0 sec 158 MBytes 22.1 Mbits/sec  << VALUE SHOWS PERFORMANCE DROP>>>

Changes

 

Cause

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