[sldev] Multithreading, Garbage collection, Caching

Laurent Laborde kerdezixe at gmail.com
Sun Mar 18 07:49:13 PDT 2007


I'll try to do some profiling on my mac book pro :)


On 3/18/07, Tleiades <tleiades at hotmail.com> wrote:
> I am still not convinced that multi threading will significantly improve the
> performace of the client, I admit it is based on guesswork, but I would
> suggest you look into the render pipeline before deciding where to implement
> your performance improvements.
>
> I believe it was Dijkstra who first coined the statement about not
> optimizing before you have made measurements, in any case, I think you
> really need to do some serious performance measurements before deciding if
> multithreading is the way to go.
>
> Tleiades
>
> ----- Original Message -----
> From: "Laurent Laborde" <kerdezixe at gmail.com>
> To: <sldev at lists.secondlife.com>
> Sent: Sunday, March 18, 2007 2:59 PM
> Subject: Re: [sldev] Multithreading, Garbage collection, Caching
>
>
> > On 3/18/07, Tleiades <tleiades at hotmail.com> wrote:
> >>
> >> Third, - I admit this is speculation - but I doubt that CPU is the true
> >> bottleneck for the SL viewer.
> >
> > As far as i know, the JPEG2000 decoding cost a lot of cpu time in SL.
> > What about multithreading this ?
> > Secondlife have to be multithreaded anyway. Newer CPU won't run faster
> > (we're stuck between 2Ghz-3Ghz since a long time ago now).
> > SL need faster cpu : cpu won't be faster
> > CPU are now dual, quad, maybe octocore : SL have to be multithreaded
> > to run faster.
> >
> > I'm going to buy a QuadCore + 4GB RAM + 8800GTX 768MB VRAM.
> > I'd like to have some kind of "advanced" option saying :
> > - Fell Free to use the 3 other core to decode jpeg2000, audio, QT
> > coded, cache managment.
> > - Load all the cache into RAM
> > - Cache the whole sim's textures into the VRAM if you think it may help.
> >
> > Loading the cache in a ramdisk may sound stupid. What if the client
> > crash ? You lose your cache ! Well... usually, when you crash the
> > client, your cache is fuxored... so .... why not ?
> >
> > --
> > Kerunix
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>
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