Messages in this thread | | | Date | Tue, 13 Oct 2009 02:45:56 -0700 (PDT) | From | David Rientjes <> | Subject | Re: [this_cpu_xx V6 7/7] this_cpu: slub aggressive use of this_cpu operations in the hotpaths |
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On Mon, 12 Oct 2009, Pekka Enberg wrote:
> The patch looks sane to me but the changelog contains no relevant > numbers on performance. I am fine with the patch going in -percpu but > the patch probably needs some more beating performance-wise before it > can go into .33. I'm CC'ing some more people who are known to do SLAB > performance testing just in case they're interested in looking at the > patch. In any case, >
I ran 60-second netperf TCP_RR benchmarks with various thread counts over two machines, both four quad-core Opterons. I ran the trials ten times each with both vanilla per-cpu#for-next at 9288f99 and with v6 of this patchset. The transfer rates were virtually identical showing no improvement or regression with this patchset in this benchmark.
[ As I reported in http://marc.info/?l=linux-kernel&m=123839191416472, this benchmark continues to be the most significant regression slub has compared to slab. ]
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