🚀 go-pugleaf

George Bell <MasterofTimeADim@netscape.net> wrote in message news:<3E1797D0.4050907@netscape.net>...

> 
> 
> No, it couldn't possibly be any slower.  Software that was specifically 
> designed for multiprocessor systems(i.e. by implementing more threads) 
> might run slower than if it had been designed for a single processor in 
> mind, because on a single processor the multiple threads would create 
> more overhead. But this only means the software can only possible run 
> faster with more CPUs. A single thread process wouldn't run any slower 
> on a multiprocessor system, it just couldn't take advantage of the 
> resources as well as the other.

if a program is written for single CPU only, even though your OS is
coordinating the 2 cpus and this program may be running on 2 cpus, but
they are not running concurrently. they are still sequential
processing.

and the kernel has to switch between the 2 CPUs for 1 single process.
it is definitely slower than the single cpu without interprocessor
communication.

I didn't see any benchmarks on Linux. 

but in windows, there are lots of benchmarks that shows faster
execution on a single CPU than a dual cpu if you use a program that
isn't multi threaded.

OS is Dual CPU complient doesn't optimize your single threaded
process.