[netperf-talk] Using netperf4

[Rick Jones]

Krishna Kumar2 wrote:
> Hi Rick,
> 
> Thanks for your reply.
> 
> 
>>>1. On the server, netperf4 -L <local IP address> fails with :
>>>      establish_listen: could not resolve host '10.1.1.41' service
> 
> netperf4
> 
>>>    I tried with -p & --L, and now it works. But I am not sure if
> 
> giving -p
> 
>>>will work correctly for multi-stream netperf connections.
>>
>>Is that a netperf4 command-line or a netserver4 command line you are
> 
> giving?
> 
> Sorry, I meant 'netserver' command. There is no netserver4 installed, right
> ?

Well, you need to run the netserver which comes with netperf4.  While 
the change hasn't been made to mainline yet, it will end-up being called 
netperf4 and netserver4.

> 
> 
>>>2. On client, how do I run ? How do I specify the server ? Do I need to
>>>specify the port ?
>>>    I tried netperf -c default_config.xml -i default_tcp_stream.xml,
> 
> but it
> 
>>>failed with
>>>      "establish_control: could not resolve remote 'localhost' port
>>>'netperf4' af 2" (again,
>>>    it seems to require a port number to be provided).
>>
>>What happens when you add a netperf4 entry into /etc/services?
> 
> 
> Can I add an entry with any port number ?

I believe so. I tend to use 56821 myself (12865, netperf2's control port 
number, backwards).

> 
> 
>>>3. How can I run 10 simultaneous threads ?
>>
>>Your config file needs ten separate test pairs defined, and the command
>>file then needs to initialize them and such.
> 
> 
> This is where I am not sure how it should be done. Can you attach the
>  config file and the command to run ? Sorry if that is a pain, if so
> I guess you are talking of default_config.xml file.

It is a bunch of cut and paste with any editor of choice.  This is one 
of the areas in netperf4 to which I hope to see significant improvments.

Also, since this will involve multiple systems, and the "default_mumble" 
files are simply replications of the default "loopback" behaviour, the 
config file needs a netserver entry for each system in the test.  For a 
pair of systems being benchmarked that would be two netserver entries.

I suspect one short-term thing which could be done would be to create a 
few more example config files :)

rick

> 
> I am trying on 8-way PPC64 systems, I guess that should be OK.
> 
> thanks,
> 
> - KK