[fpc-pascal] Threading vs Parallelism ?

[Brian]

The information about using affinity with Linux was only posted so anyone
who was interested could use it , and was not intended as an addition to
Free Pascal.

Regrading the previous comment about the hardware buffering the data , one
still must do something with the data in user space. The choice there is to
let the OS / CPU decide which core to use or dedicate a CPU core to the
thread. Your choice.

Here is the code and the Linux library you must link to in order to use the
functions.

{$LINKLIB libc.so}

...

function sched_getaffinity(pid : Ptruint; cpusetsize : longint; cpuset :
pointer) : longint; cdecl; external;

function sched_setaffinity(pid : Ptruint; cpusetsize : longint; cpuset :
pointer) : longint; cdecl; external;

function pthread_setaffinity_np(pid : Ptruint; cpusetsize : longint; cpuset
: pointer) : longint; cdecl; external;
                                  
function pthread_getaffinity_np(pid : Ptruint; cpusetsize : longint; cpuset
: pointer) : longint; cdecl; external;

Brian



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