[Pvfs2-developers] pvfs2-cp profile

[Julian Martin Kunkel]

Hi,

These results are quite interesting and the possible throughput you get with 
IB is amazing. 
However, I think you get into trouble to find the bottleneck of the operation 
and the reason for the observed gaps due to the complexity of the software 
stack. 

Maybe you could benefit from using TAS instead of DBPF so that you could avoid 
network activity at all. (Also you might use only one buffer to already fill 
the network). 

On the other hand you could use the pvfs2-hint-branch which provides you with  
better MPE logging on the server side, we have some tools to convert and 
merge client and pvfs2-server logs and show the results. I could upgrade the 
current pvfs2-hint-branch with your patches (which is currently somewhere at 
release 2.5). The reason we need parts of the advanced logging is that logs 
have a problem on the server side if multiple start events occur before the 
end events happen, for example if you use multiple flow streams. 

@Scott
I have seen you solved it by using events and wonder which tool you have used 
to create states out of the events.
You said you have problems with the MPE log on the server, maybe we could help 
you if you give details ? 

Best regards,
Julian