NASAのOpenMPベンチマークで遊ぶ

研究

NASAのOpenMPベンチマーク「NPB」
ダウンロードは「http://www.hpcs.cs.tsukuba.ac.jp/omni-openmp/download/download-benchmarks.html」よりできる。
権威のあるベンチマークらしいので、手法の評価のために使えるかも
FFTとか色々入ってる

CLASSは問題のサイズを示す。CLASS=S,A,B...とある。
実行結果 FFT 1スレッドの場合




 NAS Parallel Benchmarks 2.3 OpenMP C version - FT Benchmark
 Size                : 256x256x128

 Iterations          :           6

T =     1     Checksum =     5.046735008193e+02     5.114047905510e+02

T =     2     Checksum =     5.059412319734e+02     5.098809666433e+02

T =     3     Checksum =     5.069376896287e+02     5.098144042213e+02

T =     4     Checksum =     5.077892868474e+02     5.101336130759e+02

T =     5     Checksum =     5.085233095391e+02     5.104914655194e+02

T =     6     Checksum =     5.091487099959e+02     5.107917842803e+02

Result verification successful

class = A



 FT Benchmark Completed

 Class           =                        A

 Size            =              256x256x128

 Iterations      =                        6

 Threads         =                        1

 Time in seconds =                    25.25

 Mop/s total     =                   282.63

 Operation type  =           floating point

 Verification    =               SUCCESSFUL

 Version         =                      2.3

 Compile date    =              25 Oct 2010
 Compile options:

    CC           = gcc-4

    CLINK        = gcc-4

    C_LIB        = (none)

    C_INC        = -I../common

    CFLAGS       = -fopenmp 

    CLINKFLAGS   = -fopenmp 

    RAND         = randdp
実行結果 FFT 4スレッドの場合



 NAS Parallel Benchmarks 2.3 OpenMP C version - FT Benchmark
 Size                : 256x256x128

 Iterations          :           6

T =     1     Checksum =     5.046735008193e+02     5.114047905510e+02

T =     2     Checksum =     5.059412319734e+02     5.098809666433e+02

T =     3     Checksum =     5.069376896287e+02     5.098144042213e+02

T =     4     Checksum =     5.077892868474e+02     5.101336130759e+02

T =     5     Checksum =     5.085233095391e+02     5.104914655194e+02

T =     6     Checksum =     5.091487099959e+02     5.107917842803e+02

Result verification successful

class = A



 FT Benchmark Completed

 Class           =                        A

 Size            =              256x256x128

 Iterations      =                        6

 Threads         =                        4

 Time in seconds =                    10.57

 Mop/s total     =                   675.16

 Operation type  =           floating point

 Verification    =               SUCCESSFUL

 Version         =                      2.3

 Compile date    =              25 Oct 2010
 Compile options:

    CC           = gcc-4

    CLINK        = gcc-4

    C_LIB        = (none)

    C_INC        = -I../common

    CFLAGS       = -fopenmp 

    CLINKFLAGS   = -fopenmp 

    RAND         = randdp
おおむね、2.4倍程度の高速化に成功している