Difference between revisions of "Multi threading"

From Ilianko
Line 117: Line 117:
  
 
=== MPI ===
 
=== MPI ===
 +
 +
MPI_Init
 +
MPI_Comm_Rank
 +
MPI_Comm_Size
 +
MPI_Finalize
 +
<code><pre>
 +
/* C Example */
 +
#include <stdio.h>
 +
#include <mpi.h>
 +
 +
 +
int main (argc, argv)
 +
    int argc;
 +
    char *argv[];
 +
{
 +
  int rank, size;
 +
 +
  MPI_Init (&argc, &argv); /* starts MPI */
 +
  MPI_Comm_rank (MPI_COMM_WORLD, &rank); /* get current process id */
 +
  MPI_Comm_size (MPI_COMM_WORLD, &size); /* get number of processes */
 +
  printf( "Hello world from process %d of %d\n", rank, size );
 +
  MPI_Finalize();
 +
  return 0;
 +
}
 +
</pre></code>

Revision as of 07:31, 7 April 2012

prace

super computer infrastructer...


desislava ivanova


Prace

  • дава достъп до ресурсите Prace
    • уравниение шрьодингер...
    • 1024*4 PowerPC процесори - българския компютър ( Blue Gene/P ...(в България), 27.85tflops

http://www.prace-ri.eu/ ,

Ресурси които имаме

  • Blue Gene ...(Blue Gene/P) в България
  • Jugene (Blue Gene/P)
  • Curie
  • Hermit
  • SuperMUC
  • CRAY XE6
  • Jurora
  • NIIFI - ClusterGrid
  • CINECA

Членове

  • Аустриа
  • ... mnogo evropejski dyrzhavi

Za da se uchastva trqbwa da dokazhesh, che imash zadacha , koqto izpolzwa 512 qdra, s obshto choveshko s znachenie...

Видове

Финна гранулизация - 1 whodno izhodna система - много ядра Финна гранулна паралезация

Message packing interface - gruba paalezaciq ...

Grid computing, Cloud Computing vs Parallel Computing....

isomorphna sistemna mrezha ... nachin na kluchvane na otdelnite vyzli Onet++

6Dimensional topologia

Klysteri

  • Homogenni
  • Nehomogenni

BlueVision

Bylgarska ideq -- analiz na satelitni snimki -- prognoza za osolenost na pochvi, predvizhdane na pozhari, zamyrseni vodi, navodneniq ... - na bazata na multi spektralen analiz


Диаграма на Гант

latenstnost propuskatelna sposobnost

pattern ...

fleet

YARC chip - http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=3&ved=0CDkQFjAC&url=http%3A%2F%2Fwww.ece.gatech.edu%2Fresearch%2Flabs%2Fesl%2Fclasses%2FECE6101%2FFor6101-1%2Fyarc.ppt&ei=8s1-T52YEorFtAat8fTPBA&usg=AFQjCNGWBp5mq_fLa4qThFgnbODlNd8Z7w


SAN - system area network hibriden dizajn - 3d torus+fat Tru

Principles and Practices of Interconnection Networks (The Morgan Kaufmann Series in Computer Architecture and Design) [Hardcover] William James Dally

routing algorithm <-> topology (razmer na paketa)

store forward .... run hole .... gossip, reduced ... testwane traffic , collective network, 3D -dimensionall tools toroid, Low latency global Barier and Interupt


Dekompoziciq

Randevu

komunikaciq point to point Kontragent <=> processor

Kolektiwna komunikaciq

  • Broadcast, ne personizirana komunikaciq (one to all)
  • All to All
  • Gossiping - personizirana globalna komunikaciq (naj tezhyk rezhim)
  • Redukciq - vsichki izprashtat kym edin (root stava goreshta tochka)

Mrezhi

toroid debelo dyrvo


Wsqka programa nalaga rezhim na komunikaciq. Мрежата си има максимална възмозхност. Предложен -“ Приет трафик (офферед delivered)

Devide and Conquer

KOmpoziciq и декомпозиция

  • Coarse granularity - груба гранулация - подход с message passing MPI
  • Обща памет => финна гранулациия OpenMPI
  • Хибридно -MPI OpenMpi

...

MPI

MPI_Init MPI_Comm_Rank MPI_Comm_Size MPI_Finalize 

/* C Example */
#include <stdio.h>
#include <mpi.h>


int main (argc, argv)
     int argc;
     char *argv[];
{
  int rank, size;

  MPI_Init (&argc, &argv);	/* starts MPI */
  MPI_Comm_rank (MPI_COMM_WORLD, &rank);	/* get current process id */
  MPI_Comm_size (MPI_COMM_WORLD, &size);	/* get number of processes */
  printf( "Hello world from process %d of %d\n", rank, size );
  MPI_Finalize();
  return 0;
}
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