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[Arun Singla]

Arun Singla

Software  Engineer
EISAA
Infosys Technologies Limited
Hootagalli
Mysore

Phone -91-821-404101
Fax -91-821-404200


http://www.infy.com
mailto: arun_singla@infosys.com




-----Original Message-----
From: Fergus Henderson [mailto:fjh@cs.mu.OZ.AU]
Sent: Wednesday, February 19, 2003 9:41 AM
To: Basile STARYNKEVITCH
Cc: gclist@iecc.com
Subject: Re: [gclist] why malloc/free instead of GC?

On 18-Feb-2003, Basile STARYNKEVITCH <basile@starynkevitch.net> wrote:
> For completeness and shameless plug I also hacked the same (useless)
> program to use my Qish generational copying GC - see
> http://freshmeat.net/projects/qish for details on Qish.

IIRC, qish depends on GCC's `-fvolatile' and `-fvolatile-globals'
options,
right?

Firstly, because of this, it's not really fair to compare just GC
times, since qish will have a significant overhead on code which
does not do any allocation at all.  So benchmarks which do allocation
but have little or no computation (referencing global variables,
dereferencing pointers, etc.) will unfairly advantage qish.

Secondly, you may be interested to know that these options (or at least
`-fvolatile-globals' -- I'm not 100% sure about `-fvolatile') have been
removed from the CVS sources for GCC, because they were broken in GCC
versions 3.0 and beyond.  So this may cause trouble for Qish.

--
Fergus Henderson <fjh@cs.mu.oz.au>  |  "I have always known that the
pursuit
The University of Melbourne         |  of excellence is a lethal habit"
WWW: <http://www.cs.mu.oz.au/~fjh>  |     -- the last words of T. S.
Garp.