search

Fortran-FOSS-Programmers / FOODIE

Fortran Object-Oriented Differential-equations Integration Environment, FOODIE
127 stars 30 forks source link

Benchmark of ADT-based solvers against procedural ones #24

Open milancurcic opened 9 years ago

milancurcic commented 9 years ago

Exactly what the title says. I think it will be important to test and benchmark the performance of FOODiE's solvers against their equivalents written in a procedural style, essentially testing the efficiency of abstract data types and overloaded operators. The results will have to be satisfactory in order for FOODiE to be considered in HPC applications. I am not sure yet what satisfactory means in this case but I will think about it.

Comparing the performance of FOODiE between major Fortran compilers will be elucidating as well.

Please discuss. I will be happy to make some tests in the next few weeks.

szaghi commented 9 years ago

You are reading into my mind... I have already started a non abstract Euler 1D to compare with the one already shiped with FOODiE.

After the apparently non exciting openmp benchmarks (indeed I made a mistake for measuring weak scaling, and strong one was not so bad) I started a procedural euler 1D test. I hope to upload it monday.

Thank you Milan for pointing it out!

szaghi commented 9 years ago

Done. I have added the 1D Euler OpenMP-enabled test solved without FOODIE.

The results seem good

strong-scaling-comparison weak-scaling-comparison

For details see the manuscript.

possible issue

@francescosalvadore let me conscious that my analysis could be "partial": for verifying if a code scales satisfactory the reference serial baseline code should be highly optimized (in particular I have to check is the compiler has been able to vectorize the baseline code). I have used for all codes (serial-FOODIE, OpenMP-FOODIE, serial-without-FOODIE and OpenMP-without-FOODIE) the same -O2 compiling flags (with gfortran 5.2.0) without taking care of the actual level of optimization the compiler produced. Maybe the serial codes are not well optimized, thus the scaling result so good... Anyway, this slightly affects my aim: I just want to prove that FOODIE does not destroy the scaling, not that this test scales good itself in an absolute meaning...