Re: [PATCH 3/5] slab.c: remove branch hint

[Pekka Enberg]

Ingo Molnar kirjoitti:
> > That sounds odd to me. Can you see where the incorrectly predicted
> > calls are coming from? Calling kmem_cache_alloc_node() with node set
> > to -1 most of the time could be a real bug somewhere.
>
> I think it could occur in too limited tests - the branch prediction 
> looks 'wrong' in certain tests - while it's OK in general.
>
> Is there some easy to run workload you consider more or less 
> representative of typical SLAB patterns?

I can think of three main classes: VFS, SCSI, or network intensive 
applications and benchmarks tend to bring out the worst in SLAB. There 
are probably some interesting NUMA related things that I'm not really 
aware of.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/