On 03/19/2012 07:28 PM, Christoph Lameter wrote:
On Mon, 19 Mar 2012, Glauber Costa wrote:
I was wondering: Which benchmark would be considered the canonical one to
demonstrate the speed of the slub/slab after changes? In particular, I have
the kmem-memcg in mind
I have some in kernel benchmarking tools for page allocator and slab
allocators. But they are not really clean patches.
I'd given it a try.
So in general, Suleiman patches perform fine against bare slab, the
differences being in the order of ~ 1%. There are some spikes a little
bit above that, that would deserve more analysis.
However, reason I decided to report early, is this test:
"1 alloc N free test". It is quite erratic. memcg+kmem sometimes
performs 15 % worse, sometimes 30 % better... Always right after a cold
boot.
I was wondering if you usually see such behavior for this test, and has
some tips on the setup in case I'm doing anything wrong ?
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