[plt-scheme] JIT and flonums

We've discovered today some problems with the JIT's new flonum handling.
That may be the problem with the plots.

It's not quite fixed, yet, so I've disabled the JIT's flonum code for
now in SVN.

Matthew

At Thu, 3 Jan 2008 17:33:34 -0700, "Doug Williams" wrote:
> The problem does seem to be in PLoT.  When I run demo-1.ss (in C:\Program
> Files\PLT-FULL-3.99.0.8\collects\plot\demos on my machine), it generally has
> an empty plot.  Occasionally it will show the plot - maybe 1 time in 10 or
> so, the other times it is just the axes and labels.  [Don't be confused by
> the image in the source file, which also prints out when evaluated.  I just
> comment it out or delete it.  Then just hit the run button repeatedly.
> Also, it has to be run in the Pretty Big language because of build-list.]
> 
> I also checked it with some of the science collections tests (for example,
> uniform-int-histogram-int-example.ss in the example subdirectory of the
> science collection, which doesn't have the subcollection reference
> problem).  It exhibits the same behavior.
> 
> For the PLaneT subcollection problem, the exact error message I get is:
> bernoulli-example.ss:1:9: planet: bad module path in: (planet "bernoulli.ss"
> ("williams" "science.plt") "random-distributions").  But, (require (planet "
> science.ss" ("williams" "science.plt"))) works fine.
> 
> But there is a noticeable speedup in the overall test execution.
> 
> On Jan 3, 2008 3:25 PM, Doug Williams <m.douglas.williams at gmail.com> wrote:
> 
> > I tried running the science collection examples in 3.99.  Most of the
> > plots were just empty, so I need to see if it's a problem with the PLoT
> > package or with my code.  [They didn't error, just gave empty plots.]  For
> > the ones that did run and which are computationally intensive (with flonums)
> > - like Chebyshev evaluation and (especially) the ordinary differential
> > equation solvers - they 'seemed' much faster.  But, it's anecdotal - I just
> > eyeballed it.  I have to track down my uses of set-cdr!, etc in the
> > simulation collection before I try any of my larger examples there.
> >
> > One interesting problem came up.  Has the use of subcollections in PLaneT
> > changed with 3.99?  For example, (require (planet "bernoulli.ss"
> > ("williams" "science.plt") "random-distributions")) says it can't find the
> > file, but it works fine in V372 (and before).
> >
> > Doug
> >
> >
> >
> > On Dec 28, 2007 3:55 PM, Noel Welsh <noelwelsh at gmail.com> wrote:
> >
> > > Joyous day!  Should my code run in 3.99 I'll do some benchmarking.
> > >
> > > N.
> > >
> > > On Dec 28, 2007 10:52 PM, Matthew Flatt < mflatt at cs.utah.edu> wrote:
> > > > The latest in SVN (v3.99.0.7) includes new JIT support on x86 for
> > > > inlining flonum (i.e., inexact real) arithmetic. I expect to fill in
> > > > x86_64 and PPC support next week.
> > > >
> > > > This change makes inexact-heavy microbenchmarks run 2-3 times as fast.
> > > > It might be useful for real programs, too, but I don't seem to have
> > > any
> > > > interesting floating-point applications to try out.
> > > >
> > > > Matthew
> > > _________________________________________________
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> >
> >