Re: eclipse 5.5 gives error sometimes?

On Wed, 2002-11-27 at 12:40, Karen E Petrie wrote:
> Sebastian,
> 
> Just to let you know, I have Red Hat 8 running on my laptop with 128MB of 
> Ram and 256MB of Swap Space, andI have had no problems installing or 
> running ECLiPSe 5.5#46. 

yes I run that ECLIPSE perfectly in another red hat 8 machine but with
256Mb of RAM and 400 of Swap


> I have a suggestion to what the problem could be though. When you 
> installed Red Hat 8 on your two machines, did you install them in the same 
> way? I noticed that when I was installing Red Hat 8 it let me either have 
> the swap partition in a separate partion on my Hard Disk, or to let me 
> intergrate the linux partition with the swap space. I chose the first 
> option as I had previously partioned the Hard disk and this is the way I 
> am use to doing it. But if you chose the second option in one of your 
> systems, than perhaps it is not treating the swap space in quite the way 
> ECLiPSe expects?
> 

well, they are not exact installations of red hat (the problematic one
is a fresh installation, whereas the other is an upgrade of 7.3). In any
case, both installation use a separate partition for swap. I didn't even
know you can put the swap together with the linux file system (that
sounds weird)


> This is just a rough guess, but it might be worth exploring.
> 

thanks, I will come back on this issue so we can find out where is the
problem. Maybe there is a problem with Red Hat itself.


> Karen
> 
> 
> 
> >Date: Wed, 27 Nov 2002 17:04:55 +0000
> >From: Joachim Schimpf <j.schimpf@icparc.ic.ac.uk>
> >X-Accept-Language: en
> >MIME-Version: 1.0
> >To: Eclipse Users List <eclipse-users@icparc.ic.ac.uk>
> >CC: Sebastian Sardina <ssardina@cs.toronto.edu>
> >Subject: Re: [eclipse-users] eclipse 5.5 gives error sometimes?
> >Content-Transfer-Encoding: 7bit
> >
> >Sebastian Sardina wrote:
> >> 
> >> I installed eclipse 5.5 in two red hat 8 machines. in one, everything
> >> works fine. in the other one I get:
> >> 
> >> [ssardina@cogrobo ssardina]$ eclipse
> >> 
> >> *** ECLiPSe fatal error: Cannot reserve stack space in 
> alloc_stack_pairs()
> >
> >I don't have redhat 8 and cannot reproduce this on any machine
> >we have available.
> >
> >A freshly started eclipse should consume less than 5MB of memory
> >(by the way, real memory is irrelevant here, what counts is
> >virtual memory, i.e. swap space).
> >
> >When you run top(1) or free(1) you should see an increase in
> >memory usage of max 5MB for every eclipse you start. If you
> >see anything different, let us know.
> >
> >
> >> strange, I did an strace and here is where the error seems to be:
> >> 
> >> mmap2(NULL, 268435456, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 
> -1
> >> ENOMEM (Cannot allocate memory)
> >
> >Eclipse does this call in order to reserve address space for the
> >stacks (default 2*128MB). This call should not actually consume any
> >memory or reserve swap space, at least it doesn't in the Solaris and
> >Linux versions we use for testing. I hope this has not changed
> >in recent Linux kernels... It might also be a bug in Redhat 8.
> >
> >
> >> It seems my machine (64Mb) does not have sufficient memory to run 
> eclipse
> >> as it is.
> >> If I use -g 50M to set the global stack to 50Mb, then it works!
> >> 
> >> shouldn't eclipse recognize how much memory the machine has available?
> >
> >As I said above, the only limit should be swap space, not real
> >memory. Moreover, the memory for the global stack does not get
> >allocated all at once, but incrementally as the stack grows.
> >If that should be broken in Redhat 8, we need to look into it.
> >
> >
> >-- 
> > Joachim Schimpf              /             phone: +44 20 7594 8187
> > IC-Parc, Imperial College   /            mailto:J.Schimpf@ic.ac.uk
> > London SW7 2AZ, UK         /    http://www.icparc.ic.ac.uk/eclipse
> >
>