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That's stange. I fixed all errors mpdcheck reported (127.0.0.1)
problem. Now mpd listens on proper address. I also configured ssh so
both machines can access each other without password (like mentioned in
installation notes). I can connect two mpd's manually by launching them
on each machine:<br>
on machine 1 - mpd &<br>
on machine 2 - mpd -h <hostname> -p <port><br>
mpdtrace -l shows both mpd's are running and on the proper addresses.<br>
However automatic init by mpdboot doesn't work. Sais it can't connect
to remote mpd.<br>
All firewalls are disabled on both machines. Selinuxes are also
disabled.<br>
ssh and ping work in both directions.<br>
I'm out of ideas.<br>
Except maybe some strange things happening with my network: some
programs like ssh or ping can access virtual machine, and some like
smbclient or rsh say 'no route to host'. That's really weird.<br>
<br>
Rajeev Thakur ÐÉÛÅÔ:
<blockquote cite="mid:000c01c918e3$8f6b3360$860add8c@mcs.anl.gov"
type="cite">
<meta http-equiv="Content-Type" content="text/html; ">
<meta content="MSHTML 6.00.6000.16705" name="GENERATOR">
<div dir="ltr" align="left"><span class="125283516-17092008"><font
color="#0000ff" face="Arial" size="2">Looks like the two processes are
not able to connect to each other. Is there a firewall or something in
the networking configuration on the two machines that may prevent that.
You can usešthe mpdcheck utility to diagnose the problem. See Appendix
A.2 of the installation guide.</font></span></div>
<div dir="ltr" align="left"><span class="125283516-17092008"></span>š</div>
<div dir="ltr" align="left"><span class="125283516-17092008"><font
color="#0000ff" face="Arial" size="2">Rajeev</font></span></div>
<br>
<blockquote
style="border-left: 2px solid rgb(0, 0, 255); padding-left: 5px; margin-left: 5px; margin-right: 0px;">
<div class="OutlookMessageHeader" dir="ltr" align="left"
lang="en-us">
<hr tabindex="-1"> <font face="Tahoma" size="2"><b>From:</b>
<a class="moz-txt-link-abbreviated" href="mailto:owner-mpich-discuss@mcs.anl.gov">owner-mpich-discuss@mcs.anl.gov</a>
[<a class="moz-txt-link-freetext" href="mailto:owner-mpich-discuss@mcs.anl.gov">mailto:owner-mpich-discuss@mcs.anl.gov</a>] <b>On Behalf Of </b>The
Source<br>
<b>Sent:</b> Wednesday, September 17, 2008 10:46 AM<br>
<b>To:</b> <a class="moz-txt-link-abbreviated" href="mailto:mpich-discuss@mcs.anl.gov">mpich-discuss@mcs.anl.gov</a><br>
<b>Subject:</b> Re: [mpich-discuss] Mpich2: problems with
communications<br>
</font><br>
</div>
cpi starts and writes the following:<br>
Process 0 of 2 is on WARZONE<br>
Process 1 of 2 is on F9Virtual64<br>
Nothing more. It never exits. I didn't pass any parameters to cpi.
Should I?<br>
<br>
<pre wrap="">MPI_Bcast(&size, 1, MPI_INT, 0, MPI_COMM_WORLD) returns success, my program then prints that it is about to call next broadcast, but that's it, next broadcast never returns.
My second node is virtual Fedora 9 x86_64 (VMWare), running on server node (real Fedora 9 x86_64). Could it be the problem?
</pre>
<br>
<br>
Rajeev Thakur ÐÉÛÅÔ:
<blockquote cite="mid:8EAC407BE372431588B26E0455101FC7@thakurlaptop"
type="cite">
<pre wrap="">Does the cpi example from the examples directory run?
Does this program fail after the very first broadcast, i.e.,
</pre>
<blockquote type="cite">
<pre wrap=""> if(MPI_Bcast(&size, 1, MPI_INT, 0, MPI_COMM_WORLD)!=MPI_SUCCESS)
</pre>
</blockquote>
<pre wrap=""><!---->
Rajeev
</pre>
<blockquote type="cite">
<pre wrap="">-----Original Message-----
From: <a moz-do-not-send="true" class="moz-txt-link-abbreviated"
href="mailto:owner-mpich-discuss@mcs.anl.gov">owner-mpich-discuss@mcs.anl.gov</a>
[<a moz-do-not-send="true" class="moz-txt-link-freetext"
href="mailto:owner-mpich-discuss@mcs.anl.gov">mailto:owner-mpich-discuss@mcs.anl.gov</a>] On Behalf Of The Source
Sent: Wednesday, September 17, 2008 7:45 AM
To: <a moz-do-not-send="true" class="moz-txt-link-abbreviated"
href="mailto:mpich-discuss@mcs.anl.gov">mpich-discuss@mcs.anl.gov</a>
Subject: [mpich-discuss] Mpich2: problems with communications
I'm using mpich2 1.0.7. I installed and configured it on 2
machines, started daemons.
The problems begin when I launch my program: first MPI_Bcast
succeeds, but the second one (or any other communication
function) hangs. Source code is attached.
Also when I call MPI_Bcast, second machine deamon prints the
following:
F9Virtual64_mpdman_1 (run282): invalid msg from lhs;
expecting ringsize
got: {}
Can anyone look at the code and tell me what's wrong?
#include <mpi.h>
#include <stdio.h>
#include <string.h>
#include <math.h>
#include <sys/time.h>
int main(int arg_c, char** arg_v)
{
if(arg_c<2)
{
printf("Input file not specified\n");
return 0;
}
if(MPI_Init(&arg_c, &arg_v)!=MPI_SUCCESS)
{
printf("MPI initialization failed\n");
return 0;
}
int ProcNum, ProcRank;
MPI_Comm_size(MPI_COMM_WORLD, &ProcNum);
MPI_Comm_rank(MPI_COMM_WORLD, &ProcRank);
int size;
double e;
double* A;
double* b;
double* x, *xprev;
FILE* f=0;
if(!ProcRank)
{
f=fopen(arg_v[1], "r");
if(!f)
{
printf("Error opening input file\n");
MPI_Finalize();
return 0;
}
fscanf(f, "%d", &size);
printf("Enter desired accuracy\n");
scanf("%lf", &e);
}
if(!ProcRank)
printf("Broadcasting matrix size\n");
if(MPI_Bcast(&size, 1, MPI_INT, 0, MPI_COMM_WORLD)!=MPI_SUCCESS)
if(!ProcRank)
printf("Failed to broadcast matrix size\n");
if(!ProcRank)
printf("Broadcasting accuracy\n");
if(MPI_Bcast(&e, 1, MPI_DOUBLE, 0, MPI_COMM_WORLD)!=MPI_SUCCESS)
if(!ProcRank)
printf("Failed to broadcast accuracy\n");
A=new double[size*size];
b=new double[size];
x=new double[size];
xprev=new double[size];
memset(x, 0, size*sizeof(double));
memset(xprev, 0, size*sizeof(double));
if(!ProcRank)
{
for(int i=0; i<size; i++)
for(int j=0; j<size; j++)
fscanf(f, "%lf", &(A[i*size+j]));
for(int i=0; i<size; i++)
fscanf(f, "%lf", &(b[i]));
fclose(f);
}
if(!ProcRank)
printf("Waiting all processes to be initialized\n");
MPI_Barrier(MPI_COMM_WORLD);
if(!ProcRank)
printf("Broadcasting matrix\n");
MPI_Bcast(A, size*size, MPI_DOUBLE, 0, MPI_COMM_WORLD);
if(!ProcRank)
printf("Broadcasting b\n");
MPI_Bcast(b, size, MPI_DOUBLE, 0, MPI_COMM_WORLD);
double cursum, totalsum;
int fin, itercount=0;
if(!ProcRank)
printf("Starting calculation\n");
struct timeval tv1, tv2;
gettimeofday(&tv1, 0);
do
{
MPI_Bcast(xprev, size, MPI_DOUBLE, 0, MPI_COMM_WORLD);
itercount++;
for(int i=0; i<size; i++)
{
int snum=(size)/ProcNum;
cursum=0.0;
totalsum=0.0;
for(int n=ProcRank*snum;
n<((ProcRank==ProcNum-1)?(size):((ProcRank+1)*snum)); n++)
{
if(n<=i-1)
cursum+=A[i*size+n]*x[n];
else
cursum+=A[i*size+n]*xprev[n];
}
MPI_Barrier(MPI_COMM_WORLD);
MPI_Reduce(&cursum, &totalsum, 1, MPI_DOUBLE,
MPI_SUM, 0, MPI_COMM_WORLD);
if(!ProcRank)
{
x[i]=xprev[i]-1.0/A[i*size+i]*(totalsum-b[i]);
}
}
if(!ProcRank)
{
fin=1;
for(int i=0; i<size; i++)
if(fabs(x[i]-xprev[i])>e)
fin=0;
if(!fin)
memcpy(xprev, x, size*sizeof(double));
}
MPI_Bcast(&fin, 1, MPI_INT, 0, MPI_COMM_WORLD);
}
while(!fin);
gettimeofday(&tv2, 0);
if(!ProcRank)
{
printf("Matrix A:\n");
for(int i=0; i<size; i++)
{
for(int j=0; j<size; j++)
printf("%lf ", A[i*size+j]);
printf("\n");
}
printf("\n");
printf("Line b:\n");
for(int i=0; i<size; i++)
printf("%lf ", b[i]);
printf("\n");
printf("Iteration number: %d\n", itercount);
printf("Calculation time: %d microseconds\n",
(tv2.tv_sec-tv1.tv_sec)*1000000+(tv2.tv_usec-tv1.tv_usec));
printf("Results: \n");
for(int i=0; i<size; i++)
printf("x%d=%lf\n", i+1, x[i]);
}
MPI_Barrier(MPI_COMM_WORLD);
delete [] A;
delete [] b;
delete [] x;
delete [] xprev;
MPI_Finalize();
return 0;
}
</pre>
</blockquote>
<pre wrap=""><!---->
</pre>
</blockquote>
<br>
</blockquote>
</blockquote>
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