5.02

[Serge D. Mechveliani]

On Jun 09, 2005  Simon Marlow wrote:

> On 09 June 2005 11:47, Serge D. Mechveliani wrote:
>
> >> A difference of 2.5Mb is really very small.  If you could show that
> >> the space usage is linear in one case and flat in another, then we
> >> have a problem.
> >
> > But a ratio   2600 K / 200 K  for n = 55000  is not so small.
> >
> > I never tested this, but what if in this mergeSort-like example the
> > space sizes are
> >                      space.6.4(n) = 13*space.5.02(n)
> >
> > (which has the above ratio for n = 55000)
> > ?
>
> If you can demonstrate that GHC 6.4 uses 13 times more space than 5.02
> on your example, then that's a performance bug - but all you showed so
> far is that 6.4 uses 2.5Mb more space.  i.e. you need to do a few more
> measurements for different values of n.


I hope, this will be impossible to demonstrate.
This measurement report for 55000 was stored several years ago.

Now,  I indeed, intend to compare 6.4 to 5.02 on several examples,
downloaded  
           ghc-5.02.3  and tried to make it with  ghc-6.4  

on recent Debian Linux. But it falied.
It looks difficult to port 5.02.x to recent Debian Linux.  

----------------------------------------------------
----------------------------------------------------
...
...
> primop-primop-info.hs-incl
../../glafp-utils/mkdependC/mkdependC -f  
...

/usr/bin/ghc -M -optdep-f -optdep.depend  ...
 -recomp -Rghc-timing -H16M -O utils/Bag.lhs utils/BitSet.lhs 
...

/StixPrim.lhs main/Config.hs rename/ParseIface.hs parser/Parser.hs main/ParsePkgConf.hs
utils/FastTypes.lhs:41: warning: extra tokens at end of #else directive
utils/FastTypes.lhs:62: warning: extra tokens at end of #endif directive
...
nativeGen/MachMisc.lhs:72: unterminated argument list invoking macro "IF_ARCH_alpha"
<<ghc: 147259508 bytes, 65 GCs, 2329439/5098104 avg/max bytes residency (4 samples), 20M in use, 0.06 INIT (0.00 elapsed), 1.60 MUT (6.64 elapsed), 0.33 GC (0.36 elapsed) :ghc>>
make[2]: *** [depend] Error 1
make[1]: *** [boot] Error 1
make[1]: Leaving directory `/home/mechvel/ghc/5.02.3/ghc-5.02.3/ghc'
make: *** [all] Error 1
------------------------------------------------
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-----------------
Serge Mechveliani
mechvel at botik.ru