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Optimization_4x4_13
Jianyu Huang edited this page Aug 11, 2016
·
4 revisions
Copy the contents of file MMult_4x4_12.c
into a file named MMult_4x4_13.c
and change the contents:
Change the first lines in the makefile
to
OLD := MMult_4x4_12
NEW := MMult_4x4_13
make run
octave:3> PlotAll % this will create the plot
This time the performance graph will look something like
This version saves the packed blocks of A so that after the first iteration of the outer loop of InnerKernel
, the saved version is used. The performance gain is noticeable! The only change from the last version is the addition of if ( j== 0 )
:
if ( j == 0 ) PackMatrixA( k, &A( i, 0 ), lda, &packedA[ i*k ] );