CH,
Depends a lot on what's going on in the box.
An example from real life:
I'm running two instances of the setiathome client in the same smp box.
When the PC is 'not doing anything special', top shows that the clients
both run at 99%+ which would indicate that for processor intensive
processes, the gain is very close to 100%. Of course, the more you use
the hardware, the more you depend on other stuff than the dual
processors. Controllers, disks, network, etc.
Remember that unless a software is specifically written for it (is this
possible under std Linux?) one process will not use more than one
processor at a time. (I believe you will have to setup a cluster to do
that, but I'm unsure on this point.) If you run just one very processor
intensive application in your box, then the 'real' gain will be less
significant.
But I haven't done any 'scientific' benchmarks. Maybe someone else has
done that.
BTW, I have an ASUS P2B-D with 2*PIII-550. (This is a server machine
that normally 'does something special', but that's another story.)
Regards
Gustav
CH wrote:
>
> Has anyone experienced benchmarking Dual PIII and Single PIII? I have
> been thinking if I have two PIII 533mhz on one motherboard, two
> processors adds up to 1.66ghz. But what is the actual performance
> rating in comparison to single processor system running Linux? I plan
> in the near future to purchase dual processor and motherboard since
> Linux supports it.
>
> CH
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