[updated patch] malloc per-thread cache ready for review

[Florian Weimer]

On 05/11/2017 11:31 PM, DJ Delorie wrote:
>> I would like to see some discussion of the per-thread overhead the
>> thread cache introduces, maybe along the documentation of the tunables,
>> both the static overhead (due to new per-thread state) and some bounds
>> on the additional per-thread allocation retention.
> I put some math in the tunables docs, and also see
> https://sourceware.org/ml/libc-alpha/2017-01/msg00452.html  where this
> was discussed upstream.

Sorry, that's not what I meant.  The thread cache adds some 
workload-independent per-thread overhead to store the cache.  We should 
document how large that overhead is.

Thanks,
Florian