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<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=045312117-15122008>Hi,</SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=045312117-15122008> Great to know its working for you now. What was
the value (The value with the bad perf) of TcpAckFrequency in your machine
(Did you change the default value before you ran your test cases
?)?</SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=045312117-15122008></SPAN></FONT> </DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=045312117-15122008>Regards,</SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=045312117-15122008>Jayesh</SPAN></FONT></DIV><BR>
<DIV class=OutlookMessageHeader lang=en-us dir=ltr align=left>
<HR tabIndex=-1>
<FONT face=Tahoma size=2><B>From:</B> mpich-discuss-bounces@mcs.anl.gov
[mailto:mpich-discuss-bounces@mcs.anl.gov] <B>On Behalf Of </B>Seifer
Lin<BR><B>Sent:</B> Monday, December 15, 2008 2:05 AM<BR><B>To:</B>
mpich-discuss@mcs.anl.gov<BR><B>Subject:</B> Re: [mpich-discuss] MPICH2 1.0.6p1
& Windows HPC Server 2008(badperformance<BR></FONT><BR></DIV>
<DIV></DIV>
<DIV>Hi Everyone:</DIV>
<DIV> </DIV>
<DIV>Finally the problem is resolved by adding a registry value</DIV>
<DIV>HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces\{NIC-id}\TcpAckFrequency</DIV>
<DIV> </DIV>
<DIV>Set TcpAckFrequency to 1 resolves the problem.</DIV>
<DIV> </DIV>
<DIV>regards,</DIV>
<DIV>Seifer Lin<BR><BR></DIV>
<DIV class=gmail_quote>2008/12/10 Hisham Adel <SPAN dir=ltr><<A
href="mailto:hosham2004@yahoo.com">hosham2004@yahoo.com</A>></SPAN><BR>
<BLOCKQUOTE class=gmail_quote
style="PADDING-LEFT: 1ex; MARGIN: 0px 0px 0px 0.8ex; BORDER-LEFT: #ccc 1px solid">
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<TD vAlign=top><BR>Why are you use MPICH2 ?<BR><BR>The Cluster component
on Windows server 2008 (HPC component) have MSMPI it is like MPICH2 but
it is modified by Microsoft.<BR>You can use it as MPICH2. There is no
change in any thing the same functions and everything is the
same.<BR><BR>I have tried it on a cluster of 4 nodes and it works.<BR>
<DIV><BR><BR><BR>Hisham Adel Hassan Mohamed<BR>
<DIV><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">Research
Assistant<BR>Bioinformatics Group<BR><SPAN
style="BACKGROUND: none transparent scroll repeat 0% 0%; BORDER-BOTTOM: rgb(0,102,204) 1px dashed"><SPAN
style="BACKGROUND: none transparent scroll repeat 0% 0%; BORDER-BOTTOM: rgb(0,102,204) 1px dashed">Nile
University</SPAN></SPAN><BR><SPAN
style="BACKGROUND: none transparent scroll repeat 0% 0%; BORDER-BOTTOM: rgb(0,102,204) 1px dashed"><SPAN
style="BACKGROUND: none transparent scroll repeat 0% 0%; BORDER-BOTTOM: rgb(0,102,204) 1px dashed">Smart
Village</SPAN></SPAN> - km28 <BR><SPAN><SPAN
style="BACKGROUND: none transparent scroll repeat 0% 0%; BORDER-BOTTOM: medium none">Cairo</SPAN></SPAN>
- Alexandria Desert Road <BR><SPAN
style="BACKGROUND: none transparent scroll repeat 0% 0%; BORDER-BOTTOM: rgb(0,102,204) 1px dashed"><SPAN
style="BACKGROUND: none transparent scroll repeat 0% 0%; BORDER-BOTTOM: rgb(0,102,204) 1px dashed">Giza
, EGYPT</SPAN></SPAN> </SPAN></FONT></DIV><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">Mobile :
+2<SPAN><SPAN>0106459663<BR><A
href="mailto:Email%3AHisham.mohamed@nileu.edu.eg"
target=_blank>Email:Hisham.mohamed@nileu.edu.eg</A><BR></SPAN></SPAN></SPAN></FONT></DIV><BR><BR>---
On <B>Mon, 12/8/08, Jayesh Krishna <I><<A
href="mailto:jayesh@mcs.anl.gov"
target=_blank>jayesh@mcs.anl.gov</A>></I></B> wrote:<BR>
<BLOCKQUOTE
style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: rgb(16,16,255) 2px solid">From:
Jayesh Krishna <<A href="mailto:jayesh@mcs.anl.gov"
target=_blank>jayesh@mcs.anl.gov</A>><BR>Subject: Re:
[mpich-discuss] MPICH2 1.0.6p1 & Windows HPC Server 2008
(badperformance)<BR>To: "'Seifer Lin'" <<A
href="mailto:seiferlin@gmail.com"
target=_blank>seiferlin@gmail.com</A>><BR>Cc: <A
href="mailto:mpich-discuss@mcs.anl.gov"
target=_blank>mpich-discuss@mcs.anl.gov</A><BR>Date: Monday, December
8, 2008, 5:10 PM<BR><BR>
<DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff
size=2><SPAN>Hi,</SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff
size=2><SPAN> Can you try out the latest stable version (1.0.8)
of MPICH2 (<A
href="http://www.mcs.anl.gov/research/projects/mpich2/downloads/index.php?s=downloads"
target=_blank
rel=nofollow>http://www.mcs.anl.gov/research/projects/mpich2/downloads/index.php?s=downloads</A>)?</SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff
size=2><SPAN></SPAN></FONT> </DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff
size=2><SPAN>Regards,</SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff
size=2><SPAN>Jayesh</SPAN></FONT></DIV><BR>
<DIV lang=en-us dir=ltr align=left>
<HR>
<FONT face=Tahoma size=2><B>From:</B> <A
href="mailto:mpich-discuss-bounces@mcs.anl.gov"
target=_blank>mpich-discuss-bounces@mcs.anl.gov</A> [mailto:<A
href="mailto:mpich-discuss-bounces@mcs.anl.gov"
target=_blank>mpich-discuss-bounces@mcs.anl.gov</A>] <B>On Behalf Of
</B>Seifer Lin<BR><B>Sent:</B> Monday, December 08, 2008 12:47
AM<BR><B>To:</B> <A href="mailto:mpich-discuss@mcs.anl.gov"
target=_blank>mpich-discuss@mcs.anl.gov</A><BR><B>Subject:</B>
[mpich-discuss] MPICH2 1.0.6p1 & Windows HPC Server 2008
(badperformance)<BR></FONT><BR></DIV>
<DIV></DIV>
<DIV>Hi everyone:</DIV>
<DIV> </DIV>
<DIV>I have a cluster of 4 nodes, all of them are with Windows HPC
server 2008 installed.</DIV>
<DIV>I make all of the 4 nodes in the same workgroup. I use MPICH2
1.0.6p1 from Argonne Lab.</DIV>
<DIV>And then</DIV>
<DIV>1. firewall of all 4 nodes are turned off</DIV>
<DIV>2. UAC (User Account Control) of all 4 nodes are turned
off</DIV>
<DIV>3. I start smpd.exe (1.0.6p1 x64) in all the 4 nodes</DIV>
<DIV> </DIV>
<DIV>And I run a very simple MPI program (test_mpich2.exe)</DIV>
<DIV> </DIV>
<DIV>#include "mpi.h"<BR>#include <iostream></DIV>
<DIV>int main(int argc, char **argv)<BR>{<BR> int
cpuid, ncpu;<BR> MPI_Init(&argc,
&argv);<BR> MPI_Comm_size(MPI_COMM_WORLD,
&ncpu);<BR> MPI_Comm_rank(MPI_COMM_WORLD,
&cpuid);</DIV>
<DIV> printf("NCPU:%d, CPUID:%d\n", ncpu,
cpuid);<BR> fflush(stdout);</DIV>
<DIV> printf("start barrier\n");
fflush(stdout);<BR>
MPI_Barrier(MPI_COMM_WORLD);<BR> printf("end
barrier\n"); fflush(stdout);</DIV>
<DIV> MPI_Finalize();</DIV>
<DIV> return 0;</DIV>
<DIV>}</DIV>
<DIV> </DIV>
<DIV>The command is </DIV>
<DIV>mpiexec -hosts 2 <A href="http://192.168.1.1/" target=_blank
rel=nofollow>192.168.1.1</A> <A href="http://192.168.1.2/"
target=_blank rel=nofollow>192.168.1.2</A> <A
rel=nofollow>\\192.168.1.1\shared\test_mpich2.exe</A></DIV>
<DIV> </DIV>
<DIV>And the MPI_Barrier(...) function costs 10 seconds to return
!!!!!</DIV>
<DIV> </DIV>
<DIV>If the same code is running on a Windows XP cluster,
MPI_Barrier(...) returns at once!</DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV>Does anyone know how to solve this problem on Windows HPC Server
2008 ? (Windows Vista has the same problem, too)</DIV>
<DIV> </DIV>
<DIV>regards,</DIV>
<DIV> </DIV>
<DIV>Seifer Lin</DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV> </DIV></DIV></BLOCKQUOTE></TD></TR></TBODY></TABLE><BR></BLOCKQUOTE></DIV><BR></BODY></HTML>