Thanks, that was actually a lot of help, I had very little understanding of
the bynode and byslot thingy, thanks
On 6/5/08, Jeff Squyres wrote:
>
> On May 23, 2008, at 9:07 PM, Cally K wrote:
>
> > Hi, I have a question about --bynode and --byslot that i would like
> > to clarify
> >
> > Say, for
Scott Shaw wrote:
Hi, I hope this is the right forum for my questions. I am running into
a problem when scaling >512 cores on a infiniband cluster which has
14,336 cores. I am new to openmpi and trying to figure out the right
-mca options to pass to avoid the "mca_oob_tcp_peer_complete_connect:
If you are using a recent version of Linux (as machine A), the X server
is probably started with its TCP network connection turned off. For
example, if you do:
$ ps auxw | grep X
/usr/bin/Xorg :0 -br -audit 0 -auth /var/gdm/:0.Xauth -nolisten tcp vt7
The "-nolisten tcp" option turns off the X ser
One other parameter that I neglected to mention (and Scott pointed out
to me is *not* documented in the FAQ) is the mpi_preconnect_oob MCA
param.
This parameter will cause all the OOB connections to be created during
MPI_INIT, and *may* help such kind of issues. You *do* need to have
eno
We have two installs of openmpi-1.2.3
One with the pgi compilers the other with gcc/Nagf90
One the pgi compilers does not link against libibverbs, but ompi_info
shows the openib btl and we see traffic on the fabric.
The other built with Nagware links against libibverbs. It also shoes
in om
On Wed, 2008-06-04 at 11:43 -0700, Scott Shaw wrote:
> Hi, I was wondering if anyone had any comments with regarding to my
> posting of questions. Am I off base with my questions or is this the
> wrong forum for these types of questions?
>
> >
> > Hi, I hope this is the right forum for my que
First and foremost: is it possible to upgrade your version of Open
MPI? The version you are using (1.2.2) is rather ancient -- many bug
fixes have occurred since then (including TCP wireup issues). Note
that oob_tcp_in|exclude were renamed to be oob_tcp_if_in|exclude in
1.2.3 to be symmet
Yes -- MPI_Abort is the simplest way to get them all to die. But
you'll also get error message(s) from OMPI. So you have [at least] 2
options:
1. Exit with MPI error
-
if (rank == process_who_does_the_checking && !exists(filename)) {
print("bad!");
MPI_Abort(MPI_COMM_WORLD)
Hi, I was wondering if anyone had any comments with regarding to my
posting of questions. Am I off base with my questions or is this the
wrong forum for these types of questions?
>
> Hi, I hope this is the right forum for my questions. I am running
into a
> problem when scaling >512 cores on
In general, Open MPI doesn't have anything to do with X forwarding.
However, if you're using ssh to startup your processes, ssh may
configure X forwarding for you (depending on your local system
setup). But OMPI closes down ssh channels once applications have
launched (there's no need to
We have made a *lot* of changes to the run-time support for spawn and
some changes to the FLUSH support in the openib BTL for the upcoming
v1.3 series.
Would it be possible for you to try a trunk nightly tarball snapshot,
perchance?
http://www.open-mpi.org/nightly/trunk/
On May 29,
I really think just having them in a flash container works well,
youtube style. I do this with both snapZpro (mac only) and jing
(windows & mac), if you want to have a higher quality downloadable
traditional video though, they prob wont work.
Also these are screen+audio/voice capture tool
Thanks for all the detailed information!
It is quite likely that our bsend performance has never been tuned; we
simply implemented it, verified that it works, and then moved on -- we
hadn't considered that real applications would actually use it. :-\
But that being said, 60% difference is
On Jun 4, 2008, at 10:39 AM, tayfun sen wrote:
I would like to run an OpenMPI application on one node and since I
think
it would be better performance wise I want it to use shared memory for
communication and not tcp. Is it possible to use shared memory not
only
for MPI communication but al
Thanks for the tip!
I downloaded and tried the qt_tools but all conversions that I did to
the MP4 format looked absolutely horrid -- the resulting videos had
"jagged" images and all kinds of weird artifacts that would appear and
disappear. The slides were quite readable, but they just look
Hi Leonardo,
Leonardo Fialho wrote:
NETDEV WATCHDOG: eth0: transmit timed out
tg3: eth0: transmit timed out, resetting
tg3: tg3_stop_block timed out, ofs=2c00 enable_bit=2
tg3: tg3_stop_block timed out, ofs=4800 enable_bit=2
tg3: eth0: Link is down.
tg3: eth0: Link is up at 1000 Mbps, full duple
On May 26, 2008, at 5:17 PM, Matt Hughes wrote:
With the TCP btl, when free list items are exhausted, OMPI 1.2.6 falls
into an infinite loop:
#3981 0x002a98b4e23f in opal_condition_wait (c=0x2a98c541d0,
m=0x2a98c54180) at ../../../../opal/threads/condition.h:81
[snip]
Yoinks.
The ca
On May 23, 2008, at 9:07 PM, Cally K wrote:
Hi, I have a question about --bynode and --byslot that i would like
to clarify
Say, for example, I have a hostfile
#Hostfile
__
node0
node1 slots=2 max_slots=2
node2 slots=2 max_slots=2
node3 slots=4 max_slots=4
___
James --
Sorry for the delay in replying.
Do you have any firewall software running on your nodes (e.g.,
iptables)? OMPI uses random TCP ports to connect between nodes for
control messages. If they can't reach each other because TCP ports
are blocked, Bad Things will happen (potentially
Sorry for the delay in replying.
This looks like a problem on your system -- I think Doug is right:
your system seems to be picking the wrong libraries when you specify -
m32. Can you compile any C++ libraries/binaries with -m32 successfully?
On May 19, 2008, at 5:48 PM, Arif Ali wrote:
Hi All,
I´m experimenting a strange problem. I don´t know if it was reported,
but, thats is:
when I run Open MPI in a specific cluster the network card module (tg3)
goes down... and in some minutes go up again. Of course its results in
"[nodo22][[56833,1],3][btl_tcp_frag.c:216:mca_btl_tcp_fr
Hello,
I would like to run an OpenMPI application on one node and since I think
it would be better performance wise I want it to use shared memory for
communication and not tcp. Is it possible to use shared memory not only
for MPI communication but also for control messages and other similar
Jeff,
If I remember correctly, Microsoft dropped support for .AVI 3-4 years
ago so it can no longer be played by their media player. It is also
not native to QT, so you will have to download a plugin (I have it
somewhere if you want me to look for it).
I do not know if there is a containe
On Jun 4, 2008, at 3:54 AM, Andreas Schäfer wrote:
I consider him as a authority on this subject: ;-)
http://isites.harvard.edu/fs/html/icb.topic58703/winston1.html
Thanks -- I'll have a look!
--
Jeff Squyres
Cisco Systems
FWIW: I tried the http://adi.loris.tv/ompi-optimized.avi URL on my Mac
and got redirected to the Quicktime plugin page. I had no idea which
plugin would make it play AVI files, so I skipped it. I tried the URL
on a Windows machine and Windows Media Player (i.e., what came up by
default) s
On Wed, Jun 04, 2008 at 11:19:48AM +0200, Adrian Knoth wrote:
> People usually recommend ffmpegX for OSX. You might give it a whirl to
> transcode your mov to something else, let's say H.264 in an AVI
> container. (MP4/AVC, DivX, xvid, there are so many names for it)
I've checked your files, they
On Tue, Jun 03, 2008 at 04:48:50PM -0400, Jeff Squyres wrote:
> As for .mov, yes, this is definitely a compromise. I tried uploading
> the videos to YouTube and Google Video and a few others, but a) most
QT sucks. Youtube (Flash) sucks.
> slides look crappy and/or unreadable. So I had to
On Fri, May 30, 2008 at 10:22:42PM +0200, Radovan Herchel wrote:
> Unfortunately, Arpack is suitable only to calculate a few eigenvalues,
> not all.
I don't know much about this math stuff, but people over here like SAGE:
http://www.sagemath.org
It has an MPI binding, programming can be done
Mukesh K Srivastava wrote:
Hi OMPI Community.
Is there any thought process to extend GCC support to OpenMPI or
implementation of OpenMPI specification in GCC for C, C++ & Fortran and
making it generally available for platforms which supports POSIX.
Hi Mukesh:
Open MPI is already written in
On 16:48 Tue 03 Jun , Jeff Squyres wrote:
> - more importantly, however, the audience likes to take the slides
> away and when they actually look at them 6 weeks after the lecture,
> they might actually remember the content better because they received
> the same information via two forms
Hi Mukesh,
Open MPI is an implementation of the MPI standard. Its API is thus the
one of a library, which is contrary to, say OpenMP, which requires
changes to the compiler.
Open MPI already supports C, C++ and Fortran for virtually any
compiler and platform.
For what it's worth, there is littl
Hi OMPI Community.
Is there any thought process to extend GCC support to OpenMPI or
implementation of OpenMPI specification in GCC for C, C++ & Fortran and
making it generally available for platforms which supports POSIX.
Can GCC community think extending a support library for OpenMPI in it's
re
Hi
Could you specify few things -
(a) The version of PG Compilers being used both for HPMPI & OMPI. Is the
compilers same or the version same?
(b) Could you share the configure command given for OMPI with PG compilers?
(c) Could you compare the threads enable/disable for both cases needed?
(d)
Hi
Could you specify few things -
(a) The version of PG Compilers being used both for HPMPI & OMPI. Is the
compilers same or the version same?
(b) Could you share the configure command given for OMPI with PG compilers?
(c) Could you compare the threads enable/disable for both cases needed?
(d)
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