On Sun, 24 May 2015 16:01:41 +0300 Reco <recoverym4n@gmail.com> wrote: > Hi. > > On Sun, 24 May 2015 13:47:48 +0200 > Petter Adsen <petter@synth.no> wrote: > > > On Sun, 24 May 2015 13:26:52 +0200 > > Petter Adsen <petter@synth.no> wrote: > > > Thanks to you, I now get ~880Mbps, which is a lot better. It seems > > > increasing the MTU was what had the most effect, so I won't bother > > > with TCP window size. > > > > Now, this is a little odd: > > > > petter@monster:/etc$ iperf -i 1 -c fenris -r > > ------------------------------------------------------------ > > Server listening on TCP port 5001 > > TCP window size: 85.3 KByte (default) > > ------------------------------------------------------------ > > ------------------------------------------------------------ > > Client connecting to fenris, TCP port 5001 > > TCP window size: 280 KByte (default) > > ------------------------------------------------------------ > > [ 5] local 192.168.0.105 port 49636 connected with 192.168.0.103 > > port 5001 [ ID] Interval Transfer Bandwidth > > [ 5] 0.0- 1.0 sec 104 MBytes 875 Mbits/sec > > [ 5] 1.0- 2.0 sec 97.8 MBytes 820 Mbits/sec > > [ 5] 2.0- 3.0 sec 104 MBytes 868 Mbits/sec > > [ 5] 3.0- 4.0 sec 104 MBytes 876 Mbits/sec > > [ 5] 4.0- 5.0 sec 104 MBytes 876 Mbits/sec > > [ 5] 5.0- 6.0 sec 83.0 MBytes 696 Mbits/sec > > [ 5] 6.0- 7.0 sec 105 MBytes 879 Mbits/sec > > [ 5] 7.0- 8.0 sec 104 MBytes 875 Mbits/sec > > [ 5] 8.0- 9.0 sec 105 MBytes 884 Mbits/sec > > [ 5] 9.0-10.0 sec 104 MBytes 877 Mbits/sec > > [ 5] 0.0-10.0 sec 1016 MBytes 852 Mbits/sec > > [ 4] local 192.168.0.105 port 5001 connected with 192.168.0.103 > > port 34815 [ 4] 0.0- 1.0 sec 98.5 MBytes 826 Mbits/sec > > [ 4] 1.0- 2.0 sec 98.5 MBytes 826 Mbits/sec > > [ 4] 2.0- 3.0 sec 97.4 MBytes 817 Mbits/sec > > [ 4] 3.0- 4.0 sec 98.0 MBytes 822 Mbits/sec > > [ 4] 4.0- 5.0 sec 98.5 MBytes 827 Mbits/sec > > [ 4] 5.0- 6.0 sec 98.1 MBytes 823 Mbits/sec > > [ 4] 6.0- 7.0 sec 98.6 MBytes 827 Mbits/sec > > [ 4] 7.0- 8.0 sec 98.5 MBytes 826 Mbits/sec > > [ 4] 8.0- 9.0 sec 98.5 MBytes 827 Mbits/sec > > [ 4] 9.0-10.0 sec 98.5 MBytes 826 Mbits/sec > > [ 4] 0.0-10.0 sec 984 MBytes 825 Mbits/sec > > > > I have run it many times, and the results are consistently ~50Mbps > > lower in the other direction. MTU is set to 7152 on both hosts, but > > the window size is back to the default values (212992). > > Hmm. A first thought is that you have a different TCP window size on > client and a server. Nope. Exactly the same. > And a second thought is that you probably should check interface > statistics with ifconfig or 'ip -s link show'. Every packet that is > not RX or TX means trouble. Clean. On both hosts. And even worse, after starting to mess with this, browsing is _abysmal_. After taking a few speed tests online (speed.io etc), upload/download and ping times seem good, but the number of connections per minute are severely limited, hovering at ~700. A friend on the same network, just down the street and with the same connection gets over 1800. We are connected to the same node. Whether these tests are trustworthy, though, I have no idea. I've tried to set everything back to the defaults, as I've documented every change I've made, but it doesn't seem to help. I'll try to reboot later today if I can, I have so much context up right now that I really don't want to lose, but I haven't made any permanent changes yet, so it should come up the way it was. I really don't want to lose the extra 150Mbps I gained by increasing MTU, though, as that would have an impact on my day-to-day workflow. Petter -- "I'm ionized" "Are you sure?" "I'm positive."
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