Messages in this thread | | | Date | Sun, 14 Jul 1996 09:46:40 -0700 (PDT) | From | Christoph Lameter <> | Subject | Re: 2.0.6 Networking strangeness |
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On Sun, 14 Jul 1996, Linus Torvalds wrote:
> > ping waterf -> hur 140-160msec > > ping waterf -> miriam 1.0-1.6msec This was evidently wrong. The ping time was 1.0-1.6seconds!!! > > ping hur -> miriam 0.6-1.1msec > > > > Setup: > > > > Linux 2.0.6 (waterf) > > | > > PPP Link > > | > > Linux 2.0.6 (hur) > > | > > Ethernet > > | > > Linux 2.0.6 (miriam) > > > > Sometimes I have doubts that Alan knows what he is doing. > > Don't blame alan, blame me. It's the small patch I made to Sorry just wanted to spice up the message a bit.... I remember having the same issue around 1.3.73.
> HOWEVER, now that I look a bit more closely at your report, it starts making > less and less sense. Notably, "ping" doesn't use TCP at all, so the only > change that is in the 5->6 upgrade simply _cannot_ affect ping latency. And > the _longer_ trip to miriam from waterf (that still uses PPP) doesn't seem > affected. Sorry you are right. Its general latency. > Anyway, try just reverting on the tcp_output.c patch in 2.0.6 (it's a rather > small one), and if that fixes the problem then I guess we'll just have to go > back. However, this behaviour makes me suspect more and more that there is > something broken in the PPP (or serial code) timings, and that the TCP change > just happens to make that show up more (so the TCP change itself isn't the > bug, it just triggers the _real_ bug - not something we want to necessarily > look into in the 2.0.x series, though). I downgraded to 2.0.5 and the speed is back. * {}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{} {} Snail Mail: FTS Box 466, 135 N.Oakland Ave, Pasadena, CA 91182 {} {} FISH Internet System Administrator at Fuller Theological Seminary {} {}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}
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