Date: Thu, 10 Jul 2003 02:45:04 -0400 (EDT) From: Kenneth Culver <culverk@yumyumyum.org> To: Dan Nelson <dnelson@allantgroup.com> Cc: Julian Elischer <julian@elischer.org> Subject: Re: wierd dsl performance with -CURRENT Message-ID: <20030710024158.K8565@alpha.yumyumyum.org> In-Reply-To: <20030710062431.GQ39506@dan.emsphone.com> References: <Pine.BSF.4.21.0307091353440.22588-100000@InterJet.elischer.org> <20030709220958.GO39506@dan.emsphone.com> <20030710062431.GQ39506@dan.emsphone.com>
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> This is the data transfer, so the d2c_* plots are the interesting ones > (they graph the traffic from ftp2 to you). If you load up d2c_tput.xpl, > you can see that your throughput averaged ~164K/s for almost the entire > time. The red line is the short-term average, and you can see there > were four dips, corresponding to packet loss. Flip over to the > d2c_tsg.xpl plot, which graphs the sent packets, ACKs, and the receive > window. At 21:52:32.8, it looks like four consecutive packets were > dropped. Luckily, the packets were resent quickly, and transmission > resumed at full speed. Dips 3 and 4 look the same. Dip 2 has an extra > .2 second delay for some reason. It looks like fast restransmit kicked > in on all three dips, but for some reason it didn't recover fast enough > on #2. A TCP guru will have to tell you what to do next... Well, the actual transfer occured around 145 - 150KB/sec according to the ftp program, normally that is 160KB/sec, and the average is around 10-15KB/sec higher after you factor out at least ftp, tcp, IP, and ethernet header. My bandwidth monitor dockapp shows around 176-164 when it's working right, but now it starts really slow and eventually gets to around the average you saw in the graphs. Ken
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