[Lazarus] Threads and Libraries (dll and so)

[Hans-Peter Diettrich]

Michael Schnell schrieb:
> On 02/05/2014 10:51 AM, Michael Van Canneyt wrote:
>> Judging by your explanation to Dido, it seems you must explain your 
>> users the limits of their own brains. Adding monitors and indicators 
>> does not
>> guarantee that they will process more info  :)
> Please see the discussion on surveillance camera systems.
> 
> You can't sell a (huge) system that does not fulfill the customer's 
> expectations regarding their workflow. :-( .

Then you have to include appropriate hardware, where multiple GPUs are 
preferable to multiple CPUs when it comes to processing multiple video 
streams concurrently.

E.g. my over 10 year old TV card talks directly to the graphics card, so 
that TV display frequently continues even if the system is unresponsive 
due to some crash. When nowadays hardware doesn't allow for more video 
sources, fed into one video card, then still multiple (small) monitors 
with dedicated graphics cards could be used to display one video stream 
each. Such a configuration should outperform every threaded software 
solution, where the video data must go through a single CPU bottleneck.

Please note that even a CPU with multiple cores doesn't have multiple 
data busses for the cores. That's the narrowest bottleneck, which limits 
  the throughput on every standard machine. Next comes the DMA over one 
common data bus, which again limits the overall throughput. When instead 
you spend each camera its own small machine and monitor, the overall 
throughput can be increased (scaled) without limitations.

DoDi