On Thu, 08 Dec 2011 04:33:48 -0600 DRC <dcomman...@users.sourceforge.net> wrote:
> > If I instead run with the regular 100 Mbps transfer rate but still > artificially add latency via qdisc, then I can see a clear benefit, both > qualitatively and quantitatively-- as long as I jack up the TCP max > buffer sizes to 8 MB in /etc/sysctl.conf: > The default of 4 MB was insufficient for you? I never hit that size during my tests. > I'm not sure how realistic that configuration is, but it's not the first > time I've used it for benchmarking. I have yet to find a reliable way > to limit the bandwidth. At least on my system, trying to use qdisc for > that as well produces very unpredictable results. It has worked fine here for us. I can dig up the script we use if you'd like. > I'm probably fundamentally misunderstanding something still, but I'm > wondering why it is necessary to ping-pong off of the client to obtain > the RTT, when TCP_INFO can give you that information (through TCP_INFO) > without extending the RFB protocol. The primary reason is that we want it to work over any transport, including proxies (like SSH tunnels). TCP_INFO would also make it Linux specific. And bouncing it off the client means that we get some flow control in that the server will back off if the client is taking too long processing things. Rgds -- Pierre Ossman OpenSource-based Thin Client Technology System Developer Telephone: +46-13-21 46 00 Cendio AB Web: http://www.cendio.com A: Because it messes up the order in which people normally read text. Q: Why is top-posting such a bad thing?
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