Date: Tue, 10 Feb 2004 14:08:57 +0100 From: Bjorn Eikeland <bjorn@eikeland.info> To: Chuck Swiger <cswiger@mac.com> Cc: "freebsd-net@freebsd.org" <freebsd-net@freebsd.org> Subject: Re: dummynet = local taffic > 100ms - help! Message-ID: <opr25n47dcomdbx5@localhost> In-Reply-To: <4028C9A9.7090503@mac.com> References: <opr24pm6dnomdbx5@localhost> <4028C9A9.7090503@mac.com>
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På Tue, 10 Feb 2004 07:08:09 -0500, skrev Chuck Swiger <cswiger@mac.com>: > Bjorn Eikeland wrote: > [ ... ] >> DUMMYNET and HZ=10000 is in the kernel. >> >> Any suggestions what can be causing this? (I've only got the one nic, >> and use a adsl router for internett) > > I seem to recall some issues with setting HZ very fast, in that it > breaks the uniqueness assumptions made by TCP sequence generation if HZ > > 1000. Dummynet does want better than the standard 10ms granularity > (HZ=100), so perhaps you might try HZ=1000 and see whether that makes > any difference. > > You might also consider increasing the queue length of your pipes when > using prioriziation--- are you seeing packets being dropped? My bad, HZ is 1000 will try queue lengts, but havent seen any packets getting dropped. Have included ping statistics below: --- localhost ping statistics --- 10 packets transmitted, 10 packets received, 0% packet loss round-trip min/avg/max/stddev = 0.039/0.055/0.074/0.011 ms --- 10.0.0.2 ping statistics --- (My box) 10 packets transmitted, 10 packets received, 0% packet loss round-trip min/avg/max/stddev = 30.989/114.977/162.977/36.056 ms --- 10.0.0.3 ping statistics --- (Host on my LAN) 10 packets transmitted, 10 packets received, 0% packet loss round-trip min/avg/max/stddev = 0.224/0.247/0.300/0.024 ms --- 80.202.106.8 ping statistics --- (ADSL routers public ip) 10 packets transmitted, 10 packets received, 0% packet loss round-trip min/avg/max/stddev = 18.992/54.928/88.982/21.957 ms --- www.google.akadns.net ping statistics --- 10 packets transmitted, 10 packets received, 0% packet loss round-trip min/avg/max/stddev = 103.102/140.079/189.990/24.000 ms
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