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Re: slow network performance [message #11629 is a reply to message #11617]

Thu, 29 March 2007 17:52

John Paul Walters
Messages: 10
Registered: October 2006

Junior Member

I can't conduct the tests on the original hardware because we are running FC5. I get some package conflicts if I try to install a 2.6.9 series kernel. However, I've conducted the tests again on two RHEL4 based machines that DO support the 2.6.9 series kernel and I've posted some results below.

From VPS->VPS (with kernel 2.6.9-023stab040.1-smp):

./netperf -H 10.1.1.209 -l 100
TCP STREAM TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to 10.1.1.209 (10.1.1.209) 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 99.00 461.66

From VE0->VE0 (with kernel 2.6.9-023stab040.1-smp):

./netperf -H pdcl09 -l 100
TCP STREAM TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to pdcl09 (10.1.1.109) 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 100.21 724.75

And here's the output from VPS->VE0:

./netperf -H 10.1.1.109 -l 100
TCP STREAM TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to 10.1.1.109 (10.1.1.109) 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 100.00 521.19

Just as a comparison point, here's the netperf output from a more recent testing kernel. So matters did improve a bit at on the VE0 side.

From VE0->VE0 (with kernel 2.6.18-ovz028test010.1-smp):

./netperf -H pdcl08 -l 100
TCP STREAM TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to pdcl08 (10.1.1.108) 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 100.00 813.20

But on the VPS->VPS side, things are again pretty poor:

./netperf -H 10.1.1.209
TCP STREAM TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to 10.1.1.209 (10.1.1.209) 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 10.00 476.44

Any thoughts?
JP

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[Message index]

		slow network performance By: John Paul Walters on Wed, 28 March 2007 20:42
		Re: slow network performance By: Vasily Tarasov on Thu, 29 March 2007 07:28
		Re: slow network performance By: John Paul Walters on Thu, 29 March 2007 17:52
		Re: slow network performance By: John Paul Walters on Thu, 29 March 2007 22:39
		Re: slow network performance By: Vasily Tarasov on Fri, 30 March 2007 08:18
		Re: slow network performance By: Vasily Tarasov on Fri, 30 March 2007 18:07
		Re: slow network performance By: John Paul Walters on Fri, 30 March 2007 18:47
		Re: slow network performance By: Vasily Tarasov on Mon, 02 April 2007 08:15
		Re: slow network performance By: John Paul Walters on Mon, 02 April 2007 15:13
		Re: slow network performance By: Vasily Tarasov on Mon, 02 April 2007 15:28
		Re: slow network performance By: John Paul Walters on Mon, 02 April 2007 15:40
		Re: slow network performance By: Vasily Tarasov on Wed, 04 April 2007 12:17
		Re: slow network performance By: John Paul Walters on Thu, 05 April 2007 22:30
		Re: slow network performance By: Vasily Tarasov on Fri, 06 April 2007 08:30
		Re: slow network performance By: John Paul Walters on Fri, 06 April 2007 14:07

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