[Mesa-dev] [PATCH 1/2] util/disk_cache: support caches for multiple architectures

[Alan Swanson]

On Fri, 2017-03-03 at 12:24 +1100, Timothy Arceri wrote:
> On 03/03/17 11:53, Marek Olšák wrote:
> > 
> > OK.
> > 
> > I also wonder if 1GB isn't too conservative. Today’s games take up
> > a
> > lot of space. My installed games occupy 480 GB. I could certainly
> > spare 10 GB for a shader cache if it improves gaming experience.
> > For
> > example, my ccache size is set to 27 GB, because 1 or 5 or 10 GB
> > wasn't enough for my use case. I assume some gamers would have a
> > similar attitude.
> 
> Yeah I agree that 1GB is probably too small. This was set by Carl
> before 
> we even knew how much data we needed to cache.
> 
> I'm happy to set it at 4GB which would be a possible 8GB total.
> 
> We may need to cap it at 4GB for some platforms anyway, or at least 
> figure out a work around for this:
> https://bugs.freedesktop.org/show_bug.cgi?id=93089

I wouldn't say that 1G was too small currently as, for example, the
cache for shader heavy DeusEx:MD is ~50M compressed per your commit
message. There is the mythical quote of 640K being enough but how many
games and applications do you need cached at once?

A more relevant issue would then be the random eviction rather than
using LRU eviction.

However perhaps we could dynamically scale by checking statvfs and
quotactl to choose MAX[1G, MIN[10% user home filesystem, 10% user home
quota]]?

-- 
Alan.