[lnkForumImage]
TotalShareware - Download Free Software
Confronta i prezzi di migliaia di prodotti.
Asp Forum
 Home | Login | Register | Search 


 

Forums >

comp.programming

Please read again...

Ramine

12/12/2014 12:50:00 AM

I have correcte some typos, please read again...

Hello,



If you have noticed i have just come up with a new algorithm of my
Parallel conjugate gradient solver library that is NUMA aware, this is
really a big improvement over my previous algorithm,my new algorithm
contains two parts that are the most expensive, and those two parts are:
a vector multiplication by a transpose of a matrix, and a vector
multiplication by a matrix, but when i have parallelized my previous
algorithm, i have parallelized just the memory data cache transfer from
the L2 cache-line hit to the CPU that costs around 10 CPU cycles for
every double type, and i have parallelized also the multiplication of
two doubles and addition of two doubles, but this was not enough, cause
what we have to do also is parallelize the memory data transfers from
the memory to the L2 cache , and this is what we call a NUMA aware
algorithm that really scale on NUMA architecture, and this is what i
have done in my new algorithm, the memory data transfers from memory to
the L2 cache was also parallelized and this have made my new algorithm
NUMA aware and really scalable on NUMA architecture. But to become NUMA
aware you need also to allocate memory of the arrays of your Matrix in
different NUMA nodes, but that's easy to do.

My Parallel conjugate gradient solver library supports dense matrices
and it is a library that solves linear system of equations and also it
solves large and very large dense linear system of equations.


You can download Parallel conjugate gradient solver library from:


https://sites.google.com/site/aminer68/parallel-implementation-of-conjugate-gradient-linear-sys...


Thank you,
Amine Moulay Ramdane.
1 Answer

Mark Carroll

12/11/2014 10:07:00 PM

0

Ramine <ramine@1.1> writes:

> I have correcte some typos, please read again...

I wonder, have you tried holding your drafts for a couple of hours,
while you do something else, then re-reading before the initial posting?
It might work well for you. (When I do that, I find it's even better if
I read it from some different way, too, for instance working with it in
the editor but then re-reading a printout.) Also, when you have posts
that summarize some important points well, it might be good to have the
latest -- best, corrected -- version on your website.

-- Mark