Intel® Moderncode for Parallel Architectures
Support for developing parallel programming applications on Intel® Architecture.

## Parallel Quicksort 1.0 is here.

Novice
456 Views

Hello,

Parallel Quicksort 1.0 is here.

Description:

Parallel Quicksort that uses my threadpool engine.

Parallel Quicksort gave me 3x scaling when sorting strings on a quad cores,
it scales better than the parallel quicksort in the parallelsort library..

http://mirrors.iwi.me/lazarus/snapshots / cause it scales better on this
version.

Language: FPC Pascal v2.2.0+ / Delphi 7+: http://www.freepascal.org/

or Lazarus 32 bits or 64 bits from:

http://mirrors.iwi.me/lazarus/snapshots/

Operating Systems: Win , Linux and Mac (x86).

http://pages.videotron.com/aminer/

Thank you,
Amine Moulay Ramdane.

4 Replies
Novice
456 Views

Hello,

It is easy to use parallel quicksort , you can sort strings , integers  , reals, doubles etc
you can sort even sort then when they are inside objects.

Here is an example that i gave you inside the zip file, i am sorting strings that are inside objects:

:
---
program test;
uses parallelquicksort,sysutils,timer;

type
TStudent = Class
public
Name: string;
end;

var tab:Ttabpointer;
myobj:TParallelSort;
student:TStudent;
i:integer;

function comp(Item1, Item2: Pointer): integer;

begin

if TStudent(Item1).name < TStudent(Item2).name
then
begin
result:=-1;
exit;
end;
if TStudent(Item1).name > TStudent(Item2).name
then
begin
result:=1;
exit;
end;
if TStudent(Item1).name = TStudent(Item2).name
then
begin
result:=0;
exit;
end;

end;

begin

myobj:=TParallelSort.create(4); // set to the number of cores...
setlength(tab,100000);
for i:=low(tab) to high(tab)
do
begin
student:=TStudent.create;
student.name:= inttostr(i);
tab[high(tab)-i]:= student;
end;

HPT.Timestart;
myobj.pqsort(tab,comp);
writeln;
writeln('Time in microseconds: ',hpt.TimePeriod);

writeln;
writeln('Please press a key to continu...');
for i := LOW(tab) to HIGH(Tab)
do
begin
writeln(TStudent(tab).name,' ');
end;

for i := 0 to HIGH(Tab) do freeandnil(TStudent(tab));

setlength(tab,0);
myobj.free;

end.
---

Thank you,
Amine Moulay Ramdane.

Novice
456 Views

I wrote:
>It is easy to use parallel quicksort , you can sort strings ,
>integers  , reals, doubles etc
>you can sort even sort then when they are inside objects.

Sorry for the typo, i mean you can even sort them when they are inside objects.

Thank you,
Amine Moulay Ramdane.
Beginner
456 Views
Will there be a C/C++ version?
Valued Contributor II
456 Views
>>Will there be a C/C++ version? Aminer10, could you follow up, please? You're doing programming with Pascal and many of users on Intel forums are using C/C++ and Fortran.