[Click] Click SMP

[Brecht Vermeulen]

Hi,

well, you cannot assign a task to more than 1 CPU, so you will have to 
make a choice. You will have 3 PollDevices and 3 ToDevices in your 
configuration, so typically a StaticThreadSched will look as

StaticThreadSched(PollDevice1 1, todevice2 1, PollDevice2 0, todevice1 
0, PollDevice3 1, todevice3 0);

so the path PollDevice2 -> todevice3 would have a slight advantage.

You could also do:
PollDevice1 1
PollDevice2 1
todevice3 1
PollDevice3 0
todevice1 0
todevice1 0

but the problem is that only 1 cpu (cpu 1) will be used if there's only 
traffic from input 1 and 2 to 3 and that would be worse than a slight 
disadvantage of cache misses I think for the first config...

but of course, you can simply test the different configurations and see 
what happens.

regards,
Brecht

giovanni.giardinelli at tin.it wrote:
> Hi,
> 
> I have installed click SMP on a PC with two CPUs, two Ethernet Gb cards
> in input and another one in output. In these case I have two distinct paths
> sharing the same output network card. 
> According to the paper on SMP Click, in order to optimize router performance,
> I should assign a single path to a single CPU. The element StaticThreadSched(....)
> allows me to assign the ToDevice relating to the output network card to
> one or more CPUs. 
> In this case, it should be better to assign this task to both CPUs or only
> to one of them ?
> 
> Any advise will be very appreciated!
> 
> Giovanni
> 
> 
> 
> _______________________________________________
> click mailing list
> click at amsterdam.lcs.mit.edu
> https://amsterdam.lcs.mit.edu/mailman/listinfo/click