From: couturie Date: Mon, 22 Oct 2012 07:49:40 +0000 (+0200) Subject: suite X-Git-Url: https://bilbo.iut-bm.univ-fcomte.fr/and/gitweb/book_gpu.git/commitdiff_plain/e4346947aa62df9cab78e792050767d42c5f5ab3?ds=sidebyside;hp=-c suite --- e4346947aa62df9cab78e792050767d42c5f5ab3 diff --git a/BookGPU/Chapters/chapter2/ch2.tex b/BookGPU/Chapters/chapter2/ch2.tex index 501e34e..c33ac50 100755 --- a/BookGPU/Chapters/chapter2/ch2.tex +++ b/BookGPU/Chapters/chapter2/ch2.tex @@ -137,6 +137,8 @@ consider we have a squared matrix of size \texttt{size}. So with a 1D array, \texttt{A[i*size+j]} allows us to access to the element of the $i^{th}$ row and of the $j^{th}$ column. +In sequential the matrix multiplication is performed using three loops. Supposing that $A$, $B$ represent two square matrices, the result of the multiplication of $A \times B$ is + On C2070M Tesla card, this code take 37.68ms to perform the multiplication. On a Intel Xeon E31245 at 3.30GHz, it takes 2465ms without any parallelization (using only one core). Consequently the speed up between the CPU and GPU version is