Re: [Chromium-users] Display issues with Chromium

[Paul N. <Pau...@Su...>]

Hi Brian,

You were spot on, it was that we had 256*1024 MTU size in the config 
file, which would be OK if we had IB set up, but needed to be reduced 
for GbE.

Many thanks,
Paul.


Brian Paul wrote:
> Paul Needle wrote:
>> Thanks Brian for your response.
>>
>> We put together a DMX config today and used the render_to_app_window 
>> as part of the dmx.conf, which solved point 1. However, we now have 
>> an issue where the app hangs for about 5 seconds and then works fine 
>> for about another 5 seconds, then hangs again, etc. It could be to do 
>> with using GbE, as we are waiting for Infiniband switches, etc. 
>> However, what doesn't seem to add up is that when running VMD over 
>> DMX (app on master, rendered on slave) and not Chromium, we get good 
>> performance, however, once you put Chromium into the mix, the 
>> performance issues outlined above occur.
>>
>> Any pointers as to how to best debug what is going on would be much 
>> appreciated.
>
> Hmmm, that's weird.  I'd probably run with gdb, interupt the program 
> during one of the pauses, and see where I am, then maybe add some 
> instrumentation to see where the time is going.
>
> Might also experiment with a smaller/larger MTU in the .conf file.
>
> -Brian