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rtorrent on NAT-gateway slows down network.
Hi folks,
I have a Soekris 5501 running as router via NAT. My ADSL modem is in (pseudo) bridge mode, and I use ppp(8)/pppoe(8) to login to my provider. I also would like to use the device do download torrents with rtorrent. This works, except that my network performance drops. So I wrote this line to test http GET performance and run it a few times nc.sh: echo -n GET | nc www.xs4all.nl 80 > /dev/null rtorrent not running: $ time ./nc.sh 0m0.05s real 0m0.00s user 0m0.02s system 0m0.06s real 0m0.00s user 0m0.00s system 0m0.06s real 0m0.00s user 0m0.01s system 0m0.06s real 0m0.00s user 0m0.02s system 0m0.06s real 0m0.00s user 0m0.00s system 0m0.06s real 0m0.00s user 0m0.00s system rtorrent is running: $ time ./nc.sh 0m12.07s real 0m0.00s user 0m0.03s system 0m0.07s real 0m0.00s user 0m0.01s system 0m0.07s real 0m0.00s user 0m0.01s system 0m0.06s real 0m0.00s user 0m0.00s system 0m0.13s real 0m0.00s user 0m0.01s system 0m5.67s real 0m0.00s user 0m0.00s system 0m0.06s real 0m0.00s user 0m0.01s system 0m6.08s real 0m0.00s user 0m0.00s system I tried running 'nice 20 rtorrent' but make no remarkable difference. The machine is also running httpd, named and sshd. Is it that my platform cannot handle so many connections? Does anyone have tips on benchmarking? I really lack diagnostic skills Some other information: Code:
$ ps pieter 9642 0.9 6.0 3400 31460 p3 Ss+ 4:11PM 4:02.73 rtorrent Code:
pf.conf: set skip on lo pass ext_if="tun0" int_if="vr0" wlan_if="ral0" internal_net="10.0.0.1/16" wlan_net="192.168.0.0/16" nat on $ext_if from $internal_net to any -> ($ext_if) nat on $ext_if from $wlan_net to any -> ($ext_if) rdr on $ext_if proto tcp from any to port 6346 -> 10.0.0.2 rdr on $ext_if proto udp from any to port 6346 -> 10.0.0.2 rdr on $ext_if proto tcp from any to port 6881:6999 -> 10.0.0.2 #bitorrent block in on ! lo0 proto tcp to port 6000:6010 pass out on $ext_if proto tcp all modulate state flags S/SA pass out on $ext_if proto { udp, icmp } all modulate state Code:
Active Internet connections Proto Recv-Q Send-Q Local Address Foreign Address (state) tcp 0 0 80.101.175.113.8081 .59998 SYN_SENT tcp 0 0 80.101.175.113.9658 .35014 ESTABLISHED tcp 0 83 80.101.175.113.14615 .15579 ESTABLISHED tcp 0 0 80.101.175.113.30088 .18293 SYN_SENT tcp 0 0 80.101.175.113.20531 .48596 SYN_SENT tcp 0 0 80.101.175.113.23976 .62348 SYN_SENT tcp 0 14948 80.101.175.113.9256 .21092 ESTABLISHED tcp 0 0 80.101.175.113.5081 .45090 SYN_SENT tcp 0 0 80.101.175.113.29157 .36291 ESTABLISHED tcp 0 0 80.101.175.113.6744 .30351 SYN_SENT tcp 0 0 80.101.175.113.34522 .10700 SYN_SENT tcp 0 0 80.101.175.113.15807 .17385 SYN_SENT tcp 0 0 80.101.175.113.6200 .44270 SYN_SENT tcp 0 0 80.101.175.113.33257 .44616 SYN_SENT tcp 0 0 80.101.175.113.2320 .64042 ESTABLISHED tcp 0 0 80.101.175.113.34335 .60886 ESTABLISHED tcp 0 0 80.101.175.113.41564 .30116 ESTABLISHED tcp 0 0 127.0.0.1.53 127.0.0.1.44511 CLOSE_WAIT tcp 0 0 127.0.0.1.44511 127.0.0.1.53 FIN_WAIT_2 tcp 0 68 80.101.175.113.37694 .46121 FIN_WAIT_1 tcp 0 16384 80.101.175.113.24255 .41610 ESTABLISHED tcp 0 14948 80.101.175.113.9713 .63517 ESTABLISHED tcp 0 0 80.101.175.113.7162 .42798 ESTABLISHED tcp 0 0 80.101.175.113.44818 .38555 ESTABLISHED tcp 0 0 80.101.175.113.38834 .58791 ESTABLISHED tcp 0 15942 80.101.175.113.36317 .57427 ESTABLISHED tcp 0 0 80.101.175.113.47263 .18832 ESTABLISHED tcp 0 15315 80.101.175.113.6116 .33756 ESTABLISHED tcp 0 0 80.101.175.113.22529 .16106 ESTABLISHED tcp 0 0 80.101.175.113.9478 .18632 ESTABLISHED tcp 0 0 80.101.175.113.19665 .9913 ESTABLISHED tcp 0 0 80.101.175.113.26200 .13533 ESTABLISHED tcp 0 0 80.101.175.113.23626 .17619 ESTABLISHED tcp 0 0 80.101.175.113.45434 .54818 ESTABLISHED tcp 0 0 80.101.175.113.17929 .32731 ESTABLISHED tcp 0 0 80.101.175.113.21663 .13449 ESTABLISHED |
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Have you seen http://www.benzedrine.cx/ackpri.html ?
__________________
You don't need to be a genius to debug a pf.conf firewall ruleset, you just need the guts to run tcpdump |
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Thanks! looks very interesting.
It's even in the OpenBSD FAQ! (PF Guide) my bad Last edited by pieterverberne; 28th March 2010 at 02:57 PM. Reason: addition. |
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