Messages in this thread | | | Date | Thu, 11 Dec 2014 19:11:40 +0100 | From | Jesper Dangaard Brouer <> | Subject | Re: [PATCH 0/7] slub: Fastpath optimization (especially for RT) V1 |
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On Thu, 11 Dec 2014 11:18:31 -0600 (CST) Christoph Lameter <cl@linux.com> wrote:
> On Thu, 11 Dec 2014, Jesper Dangaard Brouer wrote: > > > I was expecting to see at least (specifically) 4.291 ns improvement, as > > this is the measured[1] cost of preempt_{disable,enable] on my system. > > Right. Those calls are taken out of the fastpaths by this patchset for > the CONFIG_PREEMPT case. So the numbers that you got do not make much > sense to me.
True, that is also that I'm saying. I'll try to figure out that is going on, tomorrow.
You are welcome to run my test harness: http://netoptimizer.blogspot.dk/2014/11/announce-github-repo-prototype-kernel.html https://github.com/netoptimizer/prototype-kernel/blob/master/getting_started.rst
Just load module: time_bench_kmem_cache1 https://github.com/netoptimizer/prototype-kernel/blob/master/kernel/lib/time_bench_kmem_cache1.c
-- Best regards, Jesper Dangaard Brouer MSc.CS, Sr. Network Kernel Developer at Red Hat Author of http://www.iptv-analyzer.org LinkedIn: http://www.linkedin.com/in/brouer
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