Hi all, seems to be a leak of 8 Byte per FC, possibly 4Byte for 32bit pointer on the FC (or Null if not alive) and 4Byte for the ID? If so, is it necessary to keep this information?
many thanks, Michael -------- Original-Nachricht -------- > Datum: Tue, 31 Mar 2009 10:53:46 +0200 > Von: "Michael Raab" <[email protected]> > An: [email protected] > Betreff: Re: [Opensg-users] memory leaks? > Hi all, > > 1.) I'm using OpenSG on Windows. > > 2.) FCFactory registry might be the problem. I've attached a sample > application, in which i create und destroy a set of dummy objects each > containing > 3 nodes, 1 transform core and 2 group cores. > For a set size of 50000 dummy objects, i can discover leaks of approx. > 3MBs after unloading the objects. Does this size sound reasonable for you? > > many thanks, > Michael > > -------- Original-Nachricht -------- > > Datum: Fri, 27 Mar 2009 10:56:25 -0500 > > Von: Dirk Reiners <[email protected]> > > An: [email protected] > > Betreff: Re: [Opensg-users] memory leaks? > > > > > Hi Michael, > > > > Michael Raab wrote: > > > Hi all, > > > > > > i'm using openSG 1.8 as basis for our vr application. When loading and > > > unloading our scenarios i discovered some memory leaks. Searching in > my > > > source code helped not to close them. I wrote a small test benchmark > in > > which > > > i create 50000 objects where each object creates 3 opensg nodes, 1 > > transform > > > core and 2 groups. After destroying my 50000 objects, the opensg nodes > > and > > > cores are successfully destroyed, if i can trust the fc statistics > > > (http://opensg.vrsource.org/trac/wiki/Tutorial/OpenSG1/Memleak). So > are > > there > > > any known memory leaks that are caused by opensg? > > > > First: how big is the memleak? But a few KB or does grow without bound? > > > > In general OpenSG 1 handles cleanup reasonably well, as long as you use > > RefPtrs > > or manage the refcount yourself. > > > > I see two possibilities: > > > > - ChangeList is not cleared. If you set it to read/write at the > beginning > > of the > > program you need to clear it occasionally or it will grow without > bounds. > > - FCFactory registry. The FCFactory keeps a registry, a simple vector, > for > > all > > created FCs, which doesn't shrink when objects are deleted (to make sure > > IDs are > > unique). If you create this many objects regularly even a few bytes in > > that > > vector can add up. > > > > Are you on Linux or Windows? If Linux I recommend running it through > > valgrind, > > which pretty reliably will find mem leaks. I don't know any equivalent > > tools on > > Windows though. > > > > Can you send us your test program? We can give it a look and see if > there > > is > > something unusual. > > > > Yours > > > > Dirk > > > > > ------------------------------------------------------------------------------ > > _______________________________________________ > > Opensg-users mailing list > > [email protected] > > https://lists.sourceforge.net/lists/listinfo/opensg-users > > -- > Neu: GMX FreeDSL Komplettanschluss mit DSL 6.000 Flatrate + > Telefonanschluss für nur 17,95 Euro/mtl.!* > http://dsl.gmx.de/?ac=OM.AD.PD003K11308T4569a -- Neu: GMX FreeDSL Komplettanschluss mit DSL 6.000 Flatrate + Telefonanschluss für nur 17,95 Euro/mtl.!* http://dsl.gmx.de/?ac=OM.AD.PD003K11308T4569a ------------------------------------------------------------------------------ _______________________________________________ Opensg-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/opensg-users
