[LARTC] multiprocesor : bridge/router ?

[LARTC] multiprocesor : bridge/router ?

[raptor]

hi,

does someone tried bridge and or router functionality of linux kernel on
multiprocessor system.
Does multiprocessor system increase network performance or give
ability to process higher traffic..

What about highest possible troughput someone have achieved ?

etc..

tia
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Re: [LARTC] multiprocesor : bridge/router ?

[Stephen Hemminger]

On Fri, 17 Sep 2004 02:26:51 +0300
raptor <raptor@tvskat.net> wrote:

> hi,
> 
> does someone tried bridge and or router functionality of linux kernel on
> multiprocessor system.
> Does multiprocessor system increase network performance or give
> ability to process higher traffic..
> 
> What about highest possible troughput someone have achieved ?

Your performance is going depend more on the bus speed and type of
NIC used. SMP might help but only if you assign the IRQ for each
NIC to a different processor. Network performance is more dependant
on memory and bus bandwidth than processor (at least with current hardware).
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Re: [LARTC] multiprocesor : bridge/router ?

[raptor]

|On Fri, 17 Sep 2004 02:26:51 +0300
|raptor <raptor@tvskat.net> wrote:
|
|> hi,
|> 
|> does someone tried bridge and or router functionality of linux kernel on
|> multiprocessor system.
|> Does multiprocessor system increase network performance or give
|> ability to process higher traffic..
|> 
|> What about highest possible troughput someone have achieved ?
|
|Your performance is going depend more on the bus speed and type of
|NIC used. SMP might help but only if you assign the IRQ for each
|NIC to a different processor. Network performance is more dependant
|on memory and bus bandwidth than processor (at least with current hardware).

]- hmm. you are probably right, I'll have to concentrate on PCI-bus and quality eth-cards . 
Any recomendation ? what about a combo ethernet cards ?
. On a SMP machine how is IRQ assigned 
so that every diiferent netcard is assigned to different CPU.


PS. It seems that nobody had test the troughput of linux networking..
If u have a link to such test pls give me a link..
Some info on which network cards offloads CPU more..
or any info u can give me on the possible max and sustained 
throughput on modern x86 computer.
|

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Re: [LARTC] multiprocesor : bridge/router ?

[Stephen Hemminger]

On Fri, 17 Sep 2004 20:04:09 +0300
raptor <raptor@tvskat.net> wrote:

> |On Fri, 17 Sep 2004 02:26:51 +0300
> |raptor <raptor@tvskat.net> wrote:
> |
> |> hi,
> |> 
> |> does someone tried bridge and or router functionality of linux kernel on
> |> multiprocessor system.
> |> Does multiprocessor system increase network performance or give
> |> ability to process higher traffic..
> |> 
> |> What about highest possible troughput someone have achieved ?
> |
> |Your performance is going depend more on the bus speed and type of
> |NIC used. SMP might help but only if you assign the IRQ for each
> |NIC to a different processor. Network performance is more dependant
> |on memory and bus bandwidth than processor (at least with current hardware).
> 
> ]- hmm. you are probably right, I'll have to concentrate on PCI-bus and quality eth-cards . 
> Any recomendation ? what about a combo ethernet cards ?
> . On a SMP machine how is IRQ assigned 
> so that every diiferent netcard is assigned to different CPU.
> 
> 
> PS. It seems that nobody had test the troughput of linux networking..
> If u have a link to such test pls give me a link..
> Some info on which network cards offloads CPU more..
> or any info u can give me on the possible max and sustained 
> throughput on modern x86 computer.

You want to look at Robert Olssen's work http://robur.slu.se/Linux/net-development/
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