Hi Kshitij,
a few things to check:
Are you building the X10 runtime from source? If so, have you set the
"optimize" flag? (In x10.runtime.17/build.xml )
The same goes for "NO_CHECKS" if your code does a lot of array access -
this removes array bounds checks (and others). I wouldn't recommend
this unless you already have a functionally correct code, as you will no
longer receive friendly X10 exceptions, but will get seg faults instead.
Both flags may also be set when building your application:
x10c++ -O -NO_CHECKS MyApp.x10
Compiling under X10 1.7 is very slow, although it appears to have
improved with X10 2.0. Have you experimented with the -commandlineonly
flag?
If none of the above makes a difference, you may wish to post the key
parts of your code to this list for further investigation.
Cheers,
Josh
Kshitij Mehta wrote:
> I forgot to mention that we are running this in the Linux environment.
>
> On Nov 12, 2009, at 2:03 PM, Kshitij Mehta wrote:
>
>
>> Hello
>> We are trying to convert a C code to x10 and parallelize it. The C code
>> (sequential) takes 17 seconds to execute. We have converted the code to x10
>> (sequential, no parallel constructs added). The java backend takes ~3
>> minutes to execute while the C++ backend takes ~30 minutes. Compiling using
>> the C++ backend takes ~12 minutes. We are using x10 v1.7.
>>
>> Any ideas on why it could be taking so long?
>>
>> Kshitij Mehta
>> Graduate Student
>> Parallel Software Technologies Lab
>> Dept. of Computer Science
>> University of Houston
>> USA
>> www.cs.uh.edu/~kmehta
>>
>>
>
> Kshitij Mehta
> Graduate Student
> Parallel Software Technologies Lab
> Dept. of Computer Science
> University of Houston
> USA
> www.cs.uh.edu/~kmehta
>
>
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