From: Jesper Dangaard Brouer <brouer@redhat.com>
To: Song Liu <liu.song.a23@gmail.com>
Cc: Networking <netdev@vger.kernel.org>,
"Daniel Borkmann" <borkmann@iogearbox.net>,
"Alexei Starovoitov" <alexei.starovoitov@gmail.com>,
"David S. Miller" <davem@davemloft.net>,
"Ilias Apalodimas" <ilias.apalodimas@linaro.org>,
bpf <bpf@vger.kernel.org>,
"Toke Høiland-Jørgensen" <toke@toke.dk>,
brouer@redhat.com, "Edward Cree" <ecree@solarflare.com>
Subject: Re: [PATCH bpf-next 0/5] Bulk optimization for XDP cpumap redirect
Date: Thu, 11 Apr 2019 15:18:43 +0200 [thread overview]
Message-ID: <20190411151843.197dfd41@carbon> (raw)
In-Reply-To: <CAPhsuW7yYqJwsrk2s5EaZOjhhxa5B0374vJGR4+BBKmh8UCQWg@mail.gmail.com>
On Wed, 10 Apr 2019 16:36:40 -0700
Song Liu <liu.song.a23@gmail.com> wrote:
> On Wed, Apr 10, 2019 at 6:00 AM Jesper Dangaard Brouer
> <brouer@redhat.com> wrote:
> >
> > This patchset utilize a number of different kernel bulk APIs for optimizing
> > the performance for the XDP cpumap redirect feature.
>
> Could you please share some numbers about the optimization?
I've documented ALL the details here:
https://github.com/xdp-project/xdp-project/blob/master/areas/cpumap/cpumap02-optimizations.org
I seem to have found that the SKB-list approach is not a performance
advantage, which is very surprising. BUT it might still be due to
invalid benchmarking, as I found that F27 behind my back is auto-loading
iptables-filter modules, which change performance. Thus, I have to
redo a lot of the tests...
I'm considering removing the SKB-list patch from the patchset, as all
other patches show a performance increase/improvement. Then we can
merge that, and then I can focus on SKB-list approach in another
patchset. BUT as I said above, I might have wrong/invalid
measurements... I have to retest before I concluded anything...
--
Best regards,
Jesper Dangaard Brouer
MSc.CS, Principal Kernel Engineer at Red Hat
LinkedIn: http://www.linkedin.com/in/brouer
next prev parent reply other threads:[~2019-04-11 13:18 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-04-10 11:43 [PATCH bpf-next 0/5] Bulk optimization for XDP cpumap redirect Jesper Dangaard Brouer
2019-04-10 11:43 ` [PATCH bpf-next 1/5] bpf: cpumap use ptr_ring_consume_batched Jesper Dangaard Brouer
2019-04-10 23:24 ` Song Liu
2019-04-11 11:23 ` Jesper Dangaard Brouer
2019-04-11 17:38 ` Song Liu
2019-04-10 11:43 ` [PATCH bpf-next 2/5] bpf: cpumap use netif_receive_skb_list Jesper Dangaard Brouer
2019-04-10 18:56 ` Edward Cree
2019-04-10 11:43 ` [PATCH bpf-next 3/5] net: core: introduce build_skb_around Jesper Dangaard Brouer
2019-04-10 23:34 ` Song Liu
2019-04-11 15:39 ` Jesper Dangaard Brouer
2019-04-11 17:43 ` Song Liu
2019-04-11 5:33 ` Ilias Apalodimas
2019-04-11 11:17 ` Jesper Dangaard Brouer
2019-04-10 11:43 ` [PATCH bpf-next 4/5] bpf: cpumap do bulk allocation of SKBs Jesper Dangaard Brouer
2019-04-10 23:30 ` Song Liu
2019-04-10 11:43 ` [PATCH bpf-next 5/5] bpf: cpumap memory prefetchw optimizations for struct page Jesper Dangaard Brouer
2019-04-10 23:35 ` Song Liu
2019-04-11 5:47 ` Ilias Apalodimas
2019-04-10 23:36 ` [PATCH bpf-next 0/5] Bulk optimization for XDP cpumap redirect Song Liu
2019-04-11 13:18 ` Jesper Dangaard Brouer [this message]
2019-04-11 17:45 ` Song Liu
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