cygwin - Write log in stdout (MPI) -


i using mpi on windows cygwin. try use critical section write log one, not mixed log.

setbuf(stdout, 0); int totalprocess; mpi_comm_size(mpi_comm_world, &totalprocess); int processrank; mpi_comm_rank(mpi_comm_world, &processrank); int rank = 0; while (rank < totalprocess) {    if (processrank == rank) {        printf("-----%d-----\n", rank);        printf("%s", logbuffer);        printf("-----%d-----\n", rank);        //fflush(stdout);    }    rank ++;    mpi_barrier(mpi_comm_world); }

i run mpi @ single machine (emulation mode):
mpirun -v -np 2 ./bin/main.out
want dedicated space log per process, wrong?
(when wrote think not work correctly...)

this same problem asked here; there enough buffering going on @ various different layers there's no guarantee final output reflect order individual processes wrote, although in practice can work "small enough" outputs.

but if goal logfile, mpi-io provides mechanisms write file in such way - mpi_file_write_ordered, writes output in order of processors file. example:

#include <string.h> #include <stdio.h> #include "mpi.h"  int main(int argc, char** argv) {     int rank, size;     mpi_file logfile;      char mylogbuffer[1024];     char line[128];      mpi_init(&argc, &argv);     mpi_comm_size(mpi_comm_world, &size);     mpi_comm_rank(mpi_comm_world, &rank);       mpi_file_open(mpi_comm_world, "logfile.txt", mpi_mode_wronly | mpi_mode_create,                    mpi_info_null, &logfile);      /* write initial message */      sprintf(mylogbuffer,"-----%d-----\n", rank);     sprintf(line,"message proc %d\n", rank);      (int i=0; i<rank; i++)         strcat(mylogbuffer, line);      sprintf(line,"-----%d-----\n", rank);     strcat(mylogbuffer, line);      mpi_file_write_ordered(logfile, mylogbuffer, strlen(mylogbuffer), mpi_char, mpi_status_ignore);      /* write message */      sprintf(mylogbuffer,"-----%d-----\nall done\n-----%d-----\n", rank, rank);     mpi_file_write_ordered(logfile, mylogbuffer, strlen(mylogbuffer), mpi_char, mpi_status_ignore);      mpi_file_close(&logfile);      mpi_finalize();     return 0; }

compiling , running gives: 

$ mpicc -o log log.c -std=c99  $ mpirun -np 5 ./log $ cat logfile.txt     -----0----- -----0----- -----1----- message proc 1 -----1----- -----2----- message proc 2 message proc 2 -----2----- -----3----- message proc 3 message proc 3 message proc 3 -----3----- -----4----- message proc 4 message proc 4 message proc 4 message proc 4 -----4----- -----0----- done -----0----- -----1----- done -----1----- -----2----- done -----2----- -----3----- done -----3----- -----4----- done -----4-----

Comments

Post a Comment

Popular posts from this blog

How to mention the localhost in android -

i trying call localhost in android application. unfortunately not possible used several methods emulator local host http://10.0.2.2/android/dbconnection.php and network ip address http://192.168.1.xx/android/dbconnection.php also http://localhost:8080/android/dbconnection.php but nothing connected localhost. purpose refer stackoverflow answers not working i facing same problem when worked on localhost. referred stackoverflow answer got solution create new emulator works fine in new emulator.
Read more

php - Calling a template part from a post -

i include iframe within post in wordpress. located inside content of post, meaning cannot in post template file, otherwise either before or after. i'd add facebook plugin within posts: <div id="socialwrap"><div class="fb-like" data-href="http://onlinearizonahomes.info" data-send="true" data-width="450" data-show-faces="true" data-font="arial"></div></div> i thinking of calling template part within post <?php get_template_part( 'social' ); ?> cannot use php within post without plugin (i'd avoid using plugin this). an alternative using javascript create html in post, seems unnecessary use of javascript. what best way add html within wordpress post? you can use shortcode. add functions.php function cudjex_fbshare( $atts, $content = null ) { global $post; $link = get_permalink($post->id); return '<div id="socialwrap...
Read more

c# - String.format() DateTime With Arabic culture -

check below code snippet, namespace testdateconvertion { class program { static void main(string[] args) { datetime testvalue = new datetime(2013, 12, 15, 15, 33, 44); cultureinfo culture = new cultureinfo("ar-sa"); string stringvalue = string.format(culture, "{0:d} {0:hh:mm:ss}", testvalue); console.writeline(stringvalue); console.readline(); } } } it gives output 22/02/35 15:33:44 i not getting how possible. whats 35 doing in output there that's 13/12/2015 in hijri, 35 means 1435 in hijri, default date format saudi arabia.
Read more