Subj : Re: JS_ARENAMETER
To   : netscape.public.mozilla.jseng
From : "Stephen Jones" <Stephen@Jones-net.com>
Date : Tue Aug 19 2003 10:23 am

OK, now I understand that the nbytes member of the arena stats structure is
always incremented, never decremented, so it would always grow, but I still
don't really understand how the "arenas" are used.

I've uncovered what appears to be a consistent memnory leak in
JS_GetStringBytes. I looked at the archives for this list and saw similar
reports, but they weren't calling JS_ShutDown and I am. When I switched from
JS_GetStringBytes to JS_GetStringChars, the leak went away.

I'm still hemoragging memory somewhere in SpiderMonkey, but not as bad as
before. Does anyone have any suggestions on where to look?

- S

"Stephen Jones" <Stephen@Jones-net.com> wrote in message
news:bhjpdq$kr73@ripley.netscape.com...
> Our application that uses SpiderMonkey has been using copious amounts of
> memory and in investigating where that memory was going, I ran across
> JS_ARENAMETER. It appears that the "arenas" are where all the memory is
> going, but I don't neccesarily understand what an "arena" is and why it's
> taking so much memory.
>
> I tried to dump out the arenas in a method similar to JS_DumpArenaStats,
but
> there were hundreds of arenas, all with similar names, so I ended up
> concatenating the statistic values for each similarly named arena. Someone
> please tell me if this is not a valid approach.
>
> The concatenated "temp" arena seems to hang around 9MB and the
"properties",
> "note", and "code" arenas seem to be inconsequential, but the "gc-arena"
is
> out of control . . . after about 5 minutes it hits 21 MB and keeps
climbing
> and the "stack" arena hits 5MB and keeps climbing.
>
> Looking at the GC Stats, the "currently allocated bytes" climbs to 8MB,
then
> drops to about 100k after a GC and the hash meter stats seem reasonable.
>
> What are these different arenas? Why would they continually grow, even
after
> a GC? How can I keep the size of these items to a minimum? What am I doing
> wrong?
>
> Thanks,
> - Stephen Jones
>
>
>
>

.