Date: Tue, 29 May 2018 07:02:27 -0700 (PDT) From: "Rodney W. Grimes" <freebsd-rwg@pdx.rh.CN85.dnsmgr.net> To: Vitalij Satanivskij <satan@ukr.net> Cc: "Muenz, Michael" <m.muenz@spam-fetish.org>, freebsd-net@freebsd.org Subject: Re: GRE/gif/netgraph tunnel speed on 10Gbit channel Message-ID: <201805291402.w4TE2RMe065517@pdx.rh.CN85.dnsmgr.net> In-Reply-To: <20180529130553.GA60437@hell.ukr.net>
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> Am 29.05.2018 um 13:33 schrieb Vitalij Satanivskij:
>
> MM> Can you try MTU 1400 on GRE0 and MSS of 1300 just for testing?
> MM> With this values I get 4600Mbit sending and 1400Mbit receiving with
> MM> iperf and 10 parallel streams.
> MM>
>
> UUUPSS looks like i have problem with metodology
>
> I'm use iperf3 and even with -P10 or run's in parallel (on diferents ports) it show summary of +-2gbits max
Iperf3 is known not to do Parallel well:
-P, --parallel n
number of parallel client streams to run. Note that iperf3 is
single threaded, so if you are CPU bound, this will not yield
higher throughput.
I suggest using iperf for -P tests that cause the single thread of
iperf3 to become CPU bound.
>
> While iperf v2 show 4+gbit's
>
> [ ID] Interval Transfer Bandwidth
> [ 11] 0.0- 0.0 sec 0.00 Bytes 0.00 bits/sec
> [ 10] 0.0-20.0 sec 910 MBytes 382 Mbits/sec
> [ 9] 0.0-20.0 sec 503 MBytes 211 Mbits/sec
> [ 8] 0.0-20.0 sec 1.66 GBytes 714 Mbits/sec
> [ 12] 0.0-20.0 sec 2.25 GBytes 965 Mbits/sec
> [ 7] 0.0-20.0 sec 368 MBytes 154 Mbits/sec
> [ 6] 0.0-20.0 sec 1.90 GBytes 815 Mbits/sec
> [ 5] 0.0-20.0 sec 900 MBytes 378 Mbits/sec
> [ 4] 0.0-20.0 sec 833 MBytes 349 Mbits/sec
> [ 3] 0.0-20.0 sec 1.11 GBytes 478 Mbits/sec
> [SUM] 0.0-20.0 sec 10.4 GBytes 4.44 Gbits/sec
>
>
> It's very strange for me but at last it mutch more beter.
>
> Ok now question is - which maximum speed we can get from gre on 10Gbit link's. ^)
--
Rod Grimes rgrimes@freebsd.org
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