Re: Mainline kernel OLTP performance update

[Nick Piggin]

On Friday 16 January 2009 21:16:31 Pekka Enberg wrote:
> On Thu, Jan 15, 2009 at 11:46:09AM +0200, Pekka Enberg wrote:
> >> It would also be nice if someone could do the performance analysis on
> >> the SLUB bug. I ran sysbench in oltp mode here and the results look
> >> like this:
> >>
> >>   [ number of transactions per second from 10 runs. ]
> >>
> >>                    min      max      avg      sd
> >>   2.6.29-rc1-slab  833.77   852.32   845.10   4.72
> >>   2.6.29-rc1-slub  823.61   851.94   836.74   8.57

> I had lockdep enabled in my config so I ran the tests again with
> x86-64 defconfig and I'm back to square one:
>
>   [ number of transactions per second from 10 runs, bigger is better ]
>
>                    min      max      avg      sd
>   2.6.29-rc1-slab  802.02   805.37   803.93   0.97
>   2.6.29-rc1-slub  807.78   811.20   809.86   1.05

Hm, I wonder why it is going slower with lockdep disabled?
Did something else change?

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