[mvapich-discuss] delay in spawning

[Dhabaleswar Panda]

You are using the old MPD-based start-up. Starting with MVAPICH2 1.2, a
new scalable and robust mpirun_rsh framework (non-MPD-based) job launching
mechanism has been added. This framework reduces job start-up time
considerably and is also scalable to multi-thousand core clusters. Please
use this and you should see considerable improvement in your job launching
framework. Please refer to the MVAPICH2 user guide from the following URL
for details on using the mpirun_rsh framework:

http://mvapich.cse.ohio-state.edu/support/user_guide_mvapich2-1.2.html

If the problem persists with the new mpirun_rsh framework, let us know.

DK

On Tue, 17 Feb 2009, Hossein Pourreza wrote:

> Hi,
>
> I used to experience with a very long delay before execution of my tasks with
> MVAPICH-0.9.8 and reported that problem. I was hopping to see a fix in the new
> version but I still have the same problem with MVAPICH-1.2. The configuration of
> my machine is: (I use SDR infiniband on PCI_X bus)
>
>
> uname -v = Generic_137112-07
>
> /usr/bin/uname -p = i386
> /bin/uname -X     = System = SunOS
> Node = power
> Release = 5.10
> KernelID = Generic_137112-07
> Machine = i86pc
> BusType = <unknown>
> Serial = <unknown>
> Users = <unknown>
> OEM# = 0
> Origin# = 1
> NumCPU = 4
>
> /bin/arch              = i86pc
> /usr/bin/arch -k       = i86pc
> /usr/convex/getsysinfo = unknown
> hostinfo               = unknown
> /bin/machine           = unknown
>
> If I try to run my program with processes more than the number of cores of one
> node, I experience a very long delay before my task gets started. This delay
> increases by increasing number of processes. I run my tasks using:
>
> mpiexec -np xx ./myprog
>
> I am using mpd as processes placement daemon.
>
> Any help will be greatly appreciated.
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