[ros-users] Arm Core Performance

[Cedric Pradalier]

On 08/06/10 09:08, Daniel Stonier wrote:
>
> Ok, applied cedric's patches and the rpc outgoing request is down from 
> an average of about 98ms to 56ms, also the returning response is down 
> to an average of 3ms. Which is starting to seem reasonable.
>
> About 40-45ms of that outgoing time is spent in the 
> xmlrpcclient->execute call in master::execute (when contacting the 
> master to initialise an rpc link). I didn't bury down any further into 
> the xmlrpc library.
>
> With cedric's patches too, the msg latency dropped to about 6ms, which 
> is getting close to the raw tcp/ip socket times I tested. So its 
> starting to seem reasonable.
>
> Nice analysis on the timers cedric! And thank you everyone for the 
> input and pointers. Now we've just one alignment trap issue to worry 
> about.
>
>

Thanks.
I was helped a lot by VirtualBox somehow highlighting these problems 
much more than they actually occurs on my system.

Cheers

-- 
Dr. Cedric Pradalier
http://www.asl.ethz.ch/people/cedricp