Memory usage regression

[Mike Hommey]

On Fri, Oct 26, 2012 at 11:45:32AM +0200, Mike Hommey wrote:
> Some more data:
> 
> http://i.imgur.com/3Q2js.png
> This is zooming on the big bump at the beginning of iteration 2. Looking
> at the corresponding allocation log, this corresponds to > 1MB
> allocations with memalign, but turning them into mallocs doesn't change
> the result, so it's not a memalign problem.
> 
> Looking more globally at the data, there is /some/ correlation with >
> 1MB allocations, but occasionally, 128KB allocations do trigger the same
> behaviour, as well as 64KB. One interesting fact is that it's only a
> limited subset of these big allocations that trigger this. The vast
> majority of them don't.
> 
> For reference, the unzoomed graph looks like this:
> http://i.imgur.com/PViYm.png

I rediscovered --enable-munmap, and tried again with that, thinking it
could be related, and it did change something, but it's still growing:
http://i.imgur.com/lWzhG.png

Mike