But gang scheduling is implemented in gcell code, or i am wrong?
Do you mean the gcell kernel?
Ok, then i have to look for gc_job_manager_impl.cc.
But there are gang_scheduling constructs in gc_job_manager.h and the
matching SWIG file and in benchmark_nop.cc.
Matty
2010/7/23 Eric Blossom <e...@comsec.com>
> On Fri, Jul 23, 2010 at 11:29:40AM +0200, matty wrote:
> > Hi,
> >
> > when i run benchmark_nop on Cell BE (PS3), i can see the speedup pretty
> > well.
> > When i take qa_fft.py as testcase i can't see the speedup.
> > All SPEs run the same code for same time. So when i use 6 SPEs, computing
> > takes the same time
> > as 1 SPE but it computes six times more.
>
> > I think i have to set gang_schedule() to true in gc_job_manager.h.
> > But how can i use this option in qa_fft.py?
> >
> > def setUp(self):
> > ph =
> > gcell.program_handle_from_filename("../../gcell/lib/spu/gcell_all")
> > opts = gcell.jm_options(ph, 1)
> > self.mgr = gcell.job_manager(opts)
> > gcell.set_singleton(self.mgr)
> >
> > gcell.jm_options() has only two parameters, in gc_job_manager.h there are
> 7
> > options.
> >
> > Maybe, somebody can help me! I want to achieve, to see the speedup as
> well
> > with qa_fft.py as testcase.
> >
> > Best Regards
> > Matty
>
> I don't believe that gang scheduling was ever implemented by the kernel.
>
> Eric
>
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