Re: Major regression on hackbench with SLUB (more numbers)

Andi Kleen
2007-12-22T02:43:47Z

On Fri, Dec 21, 2007 at 08:19:42PM -0600, Matt Mackall wrote:
>
> On Sat, 2007-12-22 at 01:28 +0100, Andi Kleen wrote:
> > Ingo Molnar <mingo@elte.hu> writes:
> >
> > > Christoph, /proc/slabinfo is an _ABI_. You HAVE to provide it. slabtop
> > > relies on it, people use it every day to monitor memory consumption.
> >
> > It's definitely not a stable ABI. slabtop tends to exit without any
> > error message on any slabinfo version number increase and I've seen
> > that happen several times in not so old kernels.
> >
> > Requiring just another slabtop update isn't really a big deal.
>
> Might as well mention that SLOB also doesn't provide this functionality,
> nor would it make any sense for it to try (because there are no
> slab-like objects to report about).

% slabinfo
Name Objects Objsize Space Slabs/Part/Cpu O/S O %Fr %Ef Flg
...
anon_vma 1551 24 81.9K 20/18/2 128 0 90 45

Seems certainly like information that slabtop could report, even if it's
not exactly the same.

-Andi