tugas3-openMP/readme.md

<p>
Gabriel Possenti Kheisa Drianasta<br>
19/442374/PA/19123
</p>

<h1>Hasil Performance tuning</h1>

<h3>Sebelum parallel</h3>
<pre>
mahasiswa2
komputasi06
  mimax=         129  mjmax=          65  mkmax=          65
  imax=         128  jmax=          64  kmax=          64
  Start rehearsal measurement process.
  Measure the performance in 10000 times.
   MFLOPS:   724.292114       time(s):   227.362640       8.79942896E-10
</pre>

<h3>Sesudah parallel</h3>
<pre>
mahasiswa2
komputasi06
  mimax=         129  mjmax=          65  mkmax=          65
  imax=         128  jmax=          64  kmax=          64
  Start rehearsal measurement process.
  Measure the performance in 10000 times.
   MFLOPS:   6017.17725       time(s):   27.3678112       8.79942896E-10
</pre>



<h1>Pembahasan</h1>

<h3>Program OMP do end do disispkan pada bagian berikut pada program <a href="https://elok.ugm.ac.id/pluginfile.php/2173252/mod_resource/content/1/sample4.f">himeno</a>:</h3>
<p>https://repo.gabrielkheisa.xyz/gabrielkheisa/tugas3-openMP/commit/1f11c6330793ba22afb953d114078c87e65d522c</p>
<img src="https://cdn.discordapp.com/attachments/1003173519879847966/1046321839607136297/image.png">
<img src="https://media.discordapp.net/attachments/1003173519879847966/1046321891406786580/image.png">

<h3>Kemudian dilanjutkan dengan penambahan $OMP parallel private() dan do reduction untuk deklarasi variabel parallel:</h3>
<p>https://repo.gabrielkheisa.xyz/gabrielkheisa/tugas3-openMP/commit/8babfcc27e3b0dc524cf99a00cbd47645b9d0273</p>
<img src="https://media.discordapp.net/attachments/1003173519879847966/1046322875797352518/image.png">

<p>Hasilnya adalah peningkatan performa dari <b>724MFLOPS</b> menjadi <b>6017MFLOPS</b></p> atau sebesar <b>8.3 kali</b> untuk <b>20 threads</b>
<br><br>
<p>Lampiran source code dan dokumentasi: https://repo.gabrielkheisa.xyz/gabrielkheisa/tugas3-openMP/src/branch/master2</p>