Does anyone thinks that it will be useful to have a latest Ubuntu disk images? I have a local 11.10 (natty) disk image that i built recently but it doesn't have stripped down kernel image.
Let me know if people are interested in it or not. - Avadh On Wed, Mar 28, 2012 at 11:22 AM, Paul Rosenfeld <[email protected]>wrote: > Ah, good to know, Thanks. > > On Wed, Mar 28, 2012 at 1:08 PM, Tae Jun Ham <[email protected]> wrote: > >> Hello, >> >> >> For your information, I tried dist-upgrade, too; however, it also broke >> my image (booting part). >> >> >> Thanks >> >> >> -Tae Jun Ham >> >> >> -----Original Message----- >> *From:* "Paul Rosenfeld"<[email protected]> >> *To:* "marss86-devel"<[email protected]>; >> *Cc:* >> *Sent:* 2012-03-29 (목) 01:54:48 >> *Subject:* [marss86-devel] SSH/RSH/OpenMPI: cautions and suggestions >> >> Greetings all, >> >> I have been doing some experimenting and I wanted to share what I've >> learned so that in case anyone else finds this thread maybe I can save them >> some time. Though it probably won't be that useful to that many people. >> >> What I've been doing is trying to get some MPI workloads running in marss >> using the OpenMPI shared memory interfaces. Now, I know this sort of >> defeats the spirit of MPI, but we have an interest in such workloads and >> since I can't imagine setting up multiple marss instances with a network >> between them to do *actual* message passing is very easy this is one avenue >> to run multiple MPI ranks without multiple marss instances. >> >> I started with the parsec ROI image, converted it to a raw image and >> chrooted the image so I could use apt-get and build stuff without the >> slowdown of using qemu. >> >> 0. My initial attempt at simply apt-getting libopenmpi failed and I >> thought it was due to an old binary so I built 1.4.5 from source. Though it >> turns out the orte_init() error was because of missing ssh/rsh [see #3 >> below], so it could be that you can simply apt-get install libopenmpi -- >> though I did find some bug reports that the shared memory mode is broken in >> 1.3.x, so use at your own peril. >> 1. Due to the age of the ubuntu distro, you have to change the entries in >> /etc/apt/sources.list to point to old-releases.ubuntu.com and then run >> an apt-get update. >> 2. Do not try to apt-get openssh-client, this will break your image. It >> turns out openssh-client pulls in a few things like mountall and upstart >> which confuse the boot process and your root partition won't mount. I >> didn't investigate further about why this fails. Perhaps doing a full on >> dist-upgrade to pull in new kernels and new libc would have fixed this, but >> I didn't try it. >> 3. OpenMPI requires either ssh or rsh for some reason even if you're >> using the shared memory system and have no networked nodes. Since >> installing ssh from apt-get breaks the boot process, you should install >> rsh-client -- it pulls in no dependencies and it gets rid of the errors in >> orte_init() when trying to run mpirun >> 4. To enable the sm mode in MPI, issue the following command: mpirun -mca >> btl self,sm -np 4 ./your_mpi_binary >> >> That's about it. >> Happy simulating. >> _______________________________________________ >> http://www.marss86.org >> Marss86-Devel mailing list >> [email protected] >> https://www.cs.binghamton.edu/mailman/listinfo/marss86-devel >> > > > _______________________________________________ > http://www.marss86.org > Marss86-Devel mailing list > [email protected] > https://www.cs.binghamton.edu/mailman/listinfo/marss86-devel > >
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