Re: Failure to build libjava on 512MB machine

[Andrew Haley <aph at redhat dot com>]

Marco Trudel writes:
 > Andrew Haley wrote:
 > > Gerald Pfeifer writes:
 > >  > I can no longer build libjava on a machine with "just" 512MB of main 
 > >  > memory (FreeBSD/i386 5.4 in this case).
 > >  > 
 > >  > Three weeks ago the build worked on that very machine; did we raise
 > >  > our minimum requirements
 > > 
 > > We just imported a whole new release of the Classpath library, and
 > > it's big.  But that doesn't explain this bug.
 > 
 > You mean 0.93, right?

Strictly speaking it's the (former) generics branch from Classpath,
but yes.

 > >  > or is this simply a bug?
 > > 
 > > I think so.  javax/swing/text/html/parser is quite small:
 > > 
 > >  $ /usr/bin/time make javax/swing/text/html/parser.lo 
 > 
 > What? No way! I always thought this must be something about 7gb or so.
 > Compiling my canadian cross mingw takes 2h. 40min to 50min is spend for 
 > compiling html/parser...
 > I think a linux normal build (static, 32bit) also needs about 2h. A 
 > cross host=mingw target=linux took only 50min to my surprise.
 > > 0.53user 0.16system 0:00.74elapsed 93%CPU (0avgtext+0avgdata 0maxresident)k
 > > 0inputs+0outputs (0major+26369minor)pagefaults 0swaps
 > > 
 > >  $ ls -lh javax/swing/text/html/.libs/parser.o 
 > > -rw-r--r-- 1 aph aph 260K Jan 30 11:44 javax/swing/text/html/.libs/parser.o
 > > 
 > > I don't know why it is using so much memory in your case.
 > 
 > I assume is has something to do with optimization.

I think I was compiling the wrong file.  There's
gnu/javax/swing/text/html/parser.lo and
javax/swing/text/html/partser.lo, which is much larger.  Sorry.

Anyway, I tried again, this time with the right file, and it took

78.67user 1.29system 1:20.01elapsed 99%CPU (0avgtext+0avgdata 0maxresident)k

and indeed, it does want a lot of memory - at peak some 550m.  It'll
be smaller on a 32-bit box, but not much smaller.

Andrew.