[fpc-devel] Present and Future of Free Pascal Compiler (1).

[Boian Mitov]

     Hi Mehmet,

Actually you are missing the point. The problem is not the operating system. 
Lets assume for the moment the simple case of a 32 core system that 
apparently will be available sometime next year (Dual octal cores with HT). 
In case you are running multiple intensive processes you are utilizing 
probably well. If you are working on a workstation however and let say 
process video, you have 2 options. You can do what we do, and have the video 
processing split among multiple threads, or you can write a single 
processing thread, and have the compiler distribute the execution between 
the cores. Each approach has advantages and disadvantages. When dealing with 
video or audio processing you can spread the task among threads relatively 
easily, although you still will have a partial utilization, if you have the 
compiler to do the distribution you probably will achieve a better result. 
This is the same old RISC versus CISC argument. In modern RISC processors 
the compiler is responsible to handle the pipelining, in the classical CISC 
processor the pipeline is controlled by the hardware. Now the RISC 
processors ware not such a success due to other design problems, but Itanium 
as example uses the same compiler driven pipelining fairly successfully. You 
can argue that the pipeline has to be controlled by the processor the same 
way you can argue that the processor utilization should be OS driven, but 
there is always alternative approach with its own advantages and 
disadvantages. Compiler multicore utilization means that a single threaded 
application can utilize a multicore system. And with hundreds of cores 
already available from SUN and probably coming from Intel soon, we may have 
to consider this.

  With best regards,
    Boian Mitov

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----- Original Message ----- 
From: "Mehmet Erol Sanliturk" <sanliturk at ttnet.net.tr>
To: <fpc-devel at lists.freepascal.org>
Sent: Wednesday, July 30, 2008 6:07 AM
Subject: [fpc-devel] Present and Future of Free Pascal Compiler (1).


> Dear Sirs ,
>
> (A)
>
> My ideas about dear Boian Mitov's views are
> the following:
>
> I do NOT think that my view is a narrow vision .