[sldev] [VWR[[PATCH] LLTextureCache::writeToCache() does not cache textures smaller than TEXTURE_CACHE_ENTRY_SIZE

[Philip Rosedale]

This is exactly the kind of work we should all be doing together!  We'll 
have a look right away at this one.  Also, there are going to be a 
number of texture pipeline changes checked in by Bao in the next few 
days that will be important to examine.

Also, if anyone wants to work on automated/instrumented testing of 
whether we are optimally downloading and displaying textures, go for 
it.  It would be so great, for example, to have a repeatable test where 
we login to a known sim/content and measure the timing and performance 
of the texture system.

P

Robin Cornelius wrote:
> As discussed at Rob's hour yesterday, i've detected an issue with the
> texture caching that is preventing saving very small textures in to
> the cache.
>
> I've opened a JIRA and attached a patch to
> http://jira.secondlife.com/browse/VWR-12686.
>
> I'm well aware that the first 600 bytes are stored in an index file.
> but the code path i have identified will not make any attempt to save
> any data if the data is smaller than TEXTURE_CACHE_ENTRY_SIZE. It will
> just delete the WriteResponder and return. After the llTextureFetch
> has finished running and decoded it moves to state cache. this invokes
> LLtextureCache::WriteToCache() which is the only path of saving to the
> disk cache.
>
> I would quite like to commit this to http-texture as it seems very
> relevant to that branch currently as textures are the focus. So Merov,
> i think this is your area currently?
>
> Regards
>
> Robin
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