Re: Mainline kernel OLTP performance update

[Pekka Enberg]

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
>>
>> And no, the numbers are not flipped, SLUB beats SLAB here. :(

On Thu, Jan 15, 2009 at 3:52 PM, Matthew Wilcox <matthew@xxxxxx> wrote:
> Um.  More transactions per second is good.  Your numbers show SLAB
> beating SLUB (even on your dual-CPU system).  And SLAB shows a lower
> standard deviation, which is also good.

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

                        Pekka
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