Christoph Pospiech <christoph.pospi...@de.ibm.com> wrote on 06/10/2010
12:06:58 PM:
> On Thursday 10 June 2010, Igor Peshansky wrote:
> > Christoph Pospiech <christoph.pospi...@de.ibm.com> wrote on 06/10/2010
> > 04:14:14 AM:
> > [...]
> > > But running this code, I am getting the error message below.
> > > Presumably my type casts are too bold.
> > > I am currently simplifying the code (which also
> > > should simplify the above closure). Nevertheless,
> > > is this supposed to work ?
> > > Should I file a bug for this ?
> >
> > Well, before you spend all that effort to reduce the size of the code,
> > I would suggest running the current code under gdb, setting a
breakpoint
> > in matmul__closure__15::apply, and stepping through the code to see if
> > you are indeed getting the right checks. One possibility I can think
> > of is that the regions of the two arrays are equal, but not the same
> > object (==), but there may be other reasons why the casts fail.
> > Igor
> >
>
> Igor,
>
> the code isn't that complicated, only little more than just "hello
world". So
> I am already done cleaning it up. The good (or bad ?) news is that the
new
> code shows the same error behavior. So no need to check out the old
version
> from git :-)
>
> Trying to follow your suggestion, I am stuck at a strange signal SIGPWR
which
> I never saw before. Are you familiar with this kind of thing ?
Sorry, should've mentioned it. SIGPWR and SIGXCPU are used by the garbage
collector, and should be ignored. We have a recommended gdb script that
sets up gdb appropriately:
# a few things that are useful for debugging x10 programs with gdb
set print static-members off
break x10aux::throwNPE
break x10aux::throwBPE
break x10aux::throwArrayIndexOutOfBoundsException
break x10aux::throwOOME
handle SIGPWR SIGXCPU nostop noprint
Hope this helps,
Igor
> This is what I did.
>
> c...@sirius:~/xample/MatMul/mm_X10/bin$ mpiexec -np 1 gdb matmul
> GNU gdb (GDB) 7.0-ubuntu
> Copyright (C) 2009 Free Software Foundation, Inc.
> License GPLv3+: GNU GPL version 3 or later
<http://gnu.org/licenses/gpl.html>
> This is free software: you are free to change and redistribute it.
> There is NO WARRANTY, to the extent permitted by law. Type "show
copying"
> and "show warranty" for details.
> This GDB was configured as "i486-linux-gnu".
> For bug reporting instructions, please see:
> <http://www.gnu.org/software/gdb/bugs/>...
> Reading symbols from /home/cp/xample/MatMul/mm_X10/bin/matmul...done.
> (gdb) list matmul__closure__14::apply
> 7 static x10aux::itable_entry _itables[2];
> 8
> 9 virtual x10aux::itable_entry* _getITables() { return _itables; }
> 10
> 11 // closure body
> 12 x10aux::ref<x10::array::Array<x10_double> >
> apply(x10aux::ref<x10::array::Array<x10_double> > x,
> x10aux::ref<x10::array::Array<x10_double> > y) {
> 13
> 14 //#line 221
"file:/home/cp/xample/MatMul/mm_X10/src/matmul.x10":
> x10.ast.X10Return_c
> 15 return saved_this->Array1D_add(x, (__extension__ ({
> 16
> x10aux::ref<x10::array::Array<x10_double> > __desugarer__var__107__ =
> (gdb) break matmul__closure__14::apply
> Breakpoint 1 at 0x81454cc: file
/home/cp/xample/MatMul/mm_X10/bin/matmul.inc,
> line 55.
> (gdb) run
> Starting program: /home/cp/xample/MatMul/mm_X10/bin/matmul
> [Thread debugging using libthread_db enabled]
> [New Thread 0xb7fddb70 (LWP 6015)]
> [New Thread 0xb77dcb70 (LWP 6016)]
> [New Thread 0xb6fbab70 (LWP 6017)]
>
> Program received signal SIGPWR, Power fail/restart.
> [Switching to Thread 0xb6fbab70 (LWP 6017)]
> 0x0012d422 in __kernel_vsyscall ()
> (gdb)
--
Igor Peshansky (note the spelling change!)
IBM T.J. Watson Research Center
X10: Parallel Productivity and Performance (http://x10-lang.org/)
XJ: No More Pain for XML's Gain (http://www.research.ibm.com/xj/)
"I hear and I forget. I see and I remember. I do and I understand" --
Confucius
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