Re: GC param tuning

["Adam D. Moss" <adam@...>]

Roberto Ierusalimschy wrote:
> > This gives rather better peak memory usage than either
> > 5.0.2 or 5.1wX and does not appear to negatively affect
> > speed even in the churningest parts of my app (so far).
>
> Can you give the "numbers" (peakmem and FPS compatible with previous
> message) for this setting?

Sure, will recompile and post soon.  (I still use 5.0.2 by
default.)

> > I don't know what function the 2*g->estimate was supposed to serve,
>
> That was a quite ad hoc attempt to emulate the behaviour of 5.0. It
> should delay the start of a new GC cycle until the program doubles the
> amount of memory it was using after the previous cycle. We were afraid
> that, without it, Lua could perform GC cycles too frequently.

Ah, I see.  Well, I can't say whether 1* causes GCs _too_
frequently but it doesn't seem to be causing me problems.  I
can see the appeal of geometric growth of these limits in
theory though, so maybe a more conservative 9/8 growth would
be adequate?

Will post results soon.

--Adam
--
Adam D. Moss   . ,,^^   adam@gimp.org   http://www.foxbox.org/   co:3