[netperf-talk] Problem with Bidirectional Test

[Rick Jones]

Ankit Goyal wrote:
> hii,
> 
> I am working with dual ethernet port on my board. I have cross compiled 
> netperf 2.4.5 on my board. So when I give ./netserver command:
> 
> Starting netserver at port no 12865
> Starting netserver at hostname 0.0.0.0 port 12865 and family AF_UNSPEC
> 
> 
> But this netserver runs on the eth0 port but I want netserver to run on 
> both ethernet ports. 

That netserver will run over any port.  The port over which tests will run will 
be influenced by the netperf command lines.

> So how to make netserver run on both ports simultaneously?

Assuming we have eth0 at 1.2.3.4 and eth1 at 2.3.4.5 on the netserver system the 
first version would be

netperf -H 1.2.3.4 ...
netperf -H 2.3.4.5 ...

If your board is running linux, you may need/want to set the "arp_ignore" 
(sysctl -a | grep ignore) sysctl to "1" to get linux out of its *very* literal 
interpretation of the weak end system model.  By default, any interface in a 
linux system will respond to ARP requests for any system-local IP address.

> and if possible can you tell me some ways to increase the throughput? you
> told me in previously that you can get 1800Mbps on 1Gig bidirectionaly but i
> am able to get
> outbound:560mbps
> inbound:450mbps
> 
> 
> wat can be done to make it to 1800 Mbps? I will be very thankful if you 
> help me out man.

You will need to see first what the bottleneck happens to be.  Attached to this 
message is some boilerplate I have worked-up that may help.

Also, what sort of I/O connection does your dual-port chip have on this board? 
PCIe?  PCI-X?  Speeds and feeds?

rick jones
lets keep this discussion on netperf-talk for the benefit of all.

> 
> Thanks
> 
> 
> 
> 
> On Thu, Jul 9, 2009 at 10:30 PM, Rick Jones <rick.jones2 at hp.com 
> <mailto:rick.jones2 at hp.com>> wrote:
> 
>     Ankit Goyal wrote:
> 
>         Thanks a ton guys!!
>          If possible could you tell me that how much max bidirectional
>         throughput I can get on 1Gbps ethernet connection?Can I get more
>         than 1 Gig by changing the drivers and kernel?
>         I know its a very relative question but i will be glad if u help
>         me out!
> 
> 
>     In theory you should be able to see O(1800) megabits/s.  Certainly
>     that would be  my expectation in this day and age:
> 
> 
>     s7:/home/raj/netperf2_trunk# netperf -H sbs133b1.west. -t TCP_RR -f
>     m -- -r 64K -s 256K -S 256K -m 32K -b 8
>     TCP REQUEST/RESPONSE TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to
>     sbs133b1.west (10.208.1.20) port 0 AF_INET : first burst 8
>     Local /Remote
>     Socket Size   Request  Resp.   Elapsed
>     Send   Recv   Size     Size    Time     Throughput
>     bytes  Bytes  bytes    bytes   secs.    10^6bits/sec
> 
>     262142 262142 65536    65536   10.00    1837.52
>     524288 524288
> 
>     whether one will always get that with the paired
>     TCP_STREAM/TCP_MAERTS test is an open question:
> 
>     s7:/home/raj/netperf2_trunk# for i in 1; do netperf -t TCP_STREAM -l
>     60 -H sbs133b1.west -P 0 & netperf -t TCP_MAERTS -l 60 -H
>     sbs133b1.west -P 0 & done
>     [1] 14619
>     [2] 14620
>     s7:/home/raj/netperf2_trunk#
>      87380  16384  16384    60.02     713.28
>      87380  16384  16384    60.01     874.86
> 
>     s7:/home/raj/netperf2_trunk# for i in 1; do netperf -t TCP_STREAM -l
>     120 -H sbs133b1.west -P 0 & netperf -t TCP_MAERTS -l 120 -H
>     sbs133b1.west -P 0 & done
>     [1] 14621
>     [2] 14622
>     s7:/home/raj/netperf2_trunk#
>      87380  16384  16384    120.03    626.89
>      87380  16384  16384    120.01    895.40
> 
>     (FWIW, one of the systems involved there is several (4 or 5?) years
>     old now)
> 
> 

-------------- next part --------------
An embedded and charset-unspecified text was scrubbed...
Name: net_perf_list
Url: http://www.netperf.org/pipermail/netperf-talk/attachments/20090713/a1cc4b0e/attachment.txt