Charm++ parallel programming system

[Phil Miller <mille121 AT illinois.edu>]

I'll investigate this on a local cluster. Are you working with the
sample code you originally linked, or a modified version? If the
sample code works, but your modification doesn't, please send us the
modified version so we can isolate the bug.

Phil

2010/2/9 Zhang Kai 
<zhangk1985 AT gmail.com>:
> hi Phil:
>
> Sorry to disturb you again.
>
> I met a new problem when I run this nbody program on a cluster which
> contains 16 nodes and totally 128 phisical processors.
>
> I have successfully run it with MPICH2. And I can also build it with AMPI.
>
> However, when I run it with this command:
> ./charmrun +p128 ./pgm 32768 30  +vp256 +tcharm_stacksize 32768000
> ++nodelist charm.hosts
>
> I found it doesn't work.
>
> By using ++verbose option, I found all nodes I listed in the nodefile have
> been connected and all pgm processs have been created at all nodes.
> But then, there was no response from them.
>
> Some times it may run successfully when I use +p64 instead of +p128. But
> some times it may not.
>
> I wonder if there is another bug or i just misconfiged AMPI.
>
> Looking forward your reply.
>
> Best wishes!
>
> Zhang Kai
> Department of Computer Science & Technology
> Tsinghua University
>
>
>
>
> 2010/1/30 Phil Miller 
> <mille121 AT illinois.edu>
>>
>> The attached patch is generated from and applies cleanly to charm-6.1.3.
>>
>> If you're familiar with the 'git' version control system, our
>> repository can be cloned from git://charm.cs.uiuc.edu/charm.git
>>
>> If you don't mind my asking, what work are you doing with AMPI? We'd
>> be very interested to hear about your experiences.
>>
>> Phil
>>
>> On Fri, Jan 29, 2010 at 08:03, Phil Miller 
>> <mille121 AT illinois.edu>
>>  wrote:
>> > 2010/1/29 张凯 
>> > <zhangk1985 AT gmail.com>:
>> >> I am using charm-6.1.3.  Can that patch fix the problem on charm-6.1.3?
>> >>
>> >> When I patch it to ampi.C by using command "patch
>> >> src/libs/ck-libs/ampi/ampi.C  AMPI_Cart_shift.patch", it reports :
>> >>
>> >> patching file src/libs/ck-libs/ampi/ampi.C
>> >> Hunk #1 succeeded at 5158 (offset -185 lines).
>> >> Hunk #2 FAILED at 5198.
>> >> 1 out of 2 hunks FAILED -- saving rejects to file
>> >> src/libs/ck-libs/ampi/ampi.C.rej
>> >>
>> >> AfterI tried to read the patch file and fix it by myself, i found that
>> >> there
>> >> maybe a lot difference between the released version and development
>> >> version
>> >> of charm source code.
>> >>
>> >> Could you help me build an patch for charm-6.1.3? Or tell me where can
>> >> i
>> >> find stable developemnt version which I can patch it by myself?
>> >
>> > I'll send you the patch against 6.1.3 shortly, when I'm in the office.
>> >
>> > Phil
>> >
>> >
>> >>
>> >> Zhang Kai
>> >>
>> >> 2010/1/29 Phil Miller 
>> >> <mille121 AT illinois.edu>
>> >>>
>> >>> The bug has been fixed in the development version of charm. If you use
>> >>> a pre-built development binary, the fix will be in tonight's autobuild
>> >>> for whatever platform you use. If you're building it from development
>> >>> source yourself, the patch is attached. If you are using the released
>> >>> Charm 6.1.x, we can port that fix over for you if you're not
>> >>> comfortable doing so yourself.
>> >>>
>> >>> Phil
>> >>>
>> >>> 2010/1/28 张凯 
>> >>> <zhangk1985 AT gmail.com>:
>> >>> >
>> >>> > i think u got the problem i suffered.
>> >>> >
>> >>> > thanks for your reply.
>> >>> >
>> >>> > best regards.
>> >>> >
>> >>> > Zhang Kai
>> >>> >
>> >>> > 2010/1/29 Phil Miller 
>> >>> > <mille121 AT illinois.edu>
>> >>> >>
>> >>> >> On Thu, Jan 28, 2010 at 07:50, 张凯 
>> >>> >> <zhangk1985 AT gmail.com>
>> >>> >>  wrote:
>> >>> >> > hi:
>> >>> >> >
>> >>> >> > I am a beginner of AMPI and trying to run a MPI program using it.
>> >>> >> > But
>> >>> >> > i
>> >>> >> > found a little problem.
>> >>> >> >
>> >>> >> > Here(
>> >>> >> >
>> >>> >> >
>> >>> >> >
>> >>> >> > http://www.mcs.anl.gov/research/projects/mpi/usingmpi/examples/advmsg/nbodypipe_c.htm)
>> >>> >> > you can find an example of a MPI program. I have successfully
>> >>> >> > built
>> >>> >> > and
>> >>> >> > run it using both MPICH and intel MPI.
>> >>> >> >
>> >>> >> > However, when i running it with AMPI, i found that the program
>> >>> >> > was
>> >>> >> > blocked
>> >>> >> > by MPI_Waitall function and never return again.
>> >>> >> >
>> >>> >> > I just run it with ++local +p2 +vp2 options. Did i miss other
>> >>> >> > options?
>> >>> >> > or
>> >>> >> > misconfig AMPI?
>> >>> >>
>> >>> >> I'm seeing the same effect as you describe on a net-linux-x86_64
>> >>> >> build
>> >>> >> of AMPI from the latest charm sources. We'll look into this and get
>> >>> >> back to you.
>> >>> >>
>> >>> >> For reference, the attached code (with added prints) produces the
>> >>> >> following:
>> >>> >>
>> >>> >> $ ./charmrun nbp +vp 4 20 +p4
>> >>> >> Charm++: scheduler running in netpoll mode.
>> >>> >> Charm++> cpu topology info is being gathered.
>> >>> >> Charm++> Running on 1 unique compute nodes (8-way SMP).
>> >>> >> Iteration 9
>> >>> >> Iteration 9:0 a
>> >>> >> Iteration 9
>> >>> >> Iteration 9:0 a
>> >>> >> Iteration 9
>> >>> >> Iteration 9:0 a
>> >>> >> Iteration 9
>> >>> >> Iteration 9:0 a
>> >>> >> Iteration 9:0 b
>> >>> >> Iteration 9:0 b
>> >>> >> Iteration 9:0 b
>> >>> >> Iteration 9:0 b
>> >>> >
>> >>> >
>> >>
>> >>
>> >
>
>