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Subject: Re: [B.A.T.M.A.N.] [RFC] batman-adv: use kmem_cache for translation
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On Sun, May 15, 2016 at 01:15:15PM +0200, Sven Eckelmann wrote:
> TODO statistics, batadv_tt_roam_node?, batadv_tt_change_node?,
> batadv_tt_req_node?, ....

Some statistics here:

https://www.open-mesh.org/projects/batman-adv/wiki/Kmalloc-kmem-cache-tests


In a nutshell, on a small TP-Link TL-841NDv8 wireless router
(MIPS/AR9341), I was able to achieve 34% more global TT entries
(or 25% less RAM usage).


Regarding SLAB_HWCACHE_ALIGN, it did not seem to make much of a
difference. There is a slight tendency for less RAM usage without
this flag. But it is so small, that it might be a coincident, too.
And it is definitely negligable. At least for this architecture.

Regards, Linus


PS: I might make some more, pretty graphs for the other test
variables, too. But for now, there is just this one raw table for
that.