Re: SLUB performance regression vs SLAB

[Andi Kleen]

Jens Axboe <jens.axboe@xxxxxxxxxx> writes:
> 
> Writing a small test module to exercise slub/slab in various ways
> (allocating from all cpus freeing from one, as described) should not be
> too hard. Perhaps that would be enough to find this performance
> discrepancy between slab and slub?

You could simulate that by just sending packets using unix sockets 
between threads bound to different CPUs. Sending a packet allocates; receiving 
deallocates.

But it's not clear that will really simulate the cache bounce environment
of the database test. I don't think all passing of data between CPUs 
using slub objects is slow.

-Andi
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