Hi All,
I am trying to use iperf on RHEL 6 and I am getting wrong result in UDP
case. My network max spped is 1gbp/s , but with 2.6.32 kernel it is giving
me 38 gbp/s. With 2.6.18 kernel I was getting ~800 mbp/s speed. Following
command has run for client:
[root@pvm61ext3 iperf-2.0.5]# iperf -c 139.185.51.53 -u -b 300M
------------------------------------------------------------
Client connecting to 139.185.51.53, UDP port 5001
Sending 1470 byte datagrams
UDP buffer size: 256 KByte (default)
------------------------------------------------------------
[ 3] local 139.185.48.101 port 6574 connected with 139.185.51.53 port 5001
[ ID] Interval Transfer Bandwidth
[ 3] 0.0-10.0 sec 44.4 GBytes 38.1 Gbits/sec
[ 3] Sent 256383 datagrams
read failed: Connection refused
[ 3] WARNING: did not receive ack of last datagram after 2 tries.
Following command has run for server:
[root@pvm61ocfs iperf-2.0.5]# iperf -s -w 128k
Can anybody please help me here to understand why it is happening. Is this a
kernel bug or iperf bug ?
Krishna
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