Messages in this thread |  | | | Date | Fri, 19 Feb 1999 11:26:20 +0100 | | From | ralf@uni-kobl ... | | Subject | Re: 2.2.1 TCP & IRIX 6.x |
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On Thu, Feb 18, 1999 at 06:54:56PM +1100, Ben Ross wrote:
> I have recently seen a very noticable TCP performance drop transferring > files (via FTP) from an SGI (both Indy & O2 running IRIX 6.x) to a machine > running Linux 2.2.1. In the IRIX -> Linux direction the speed seems to be > limited to a maximum of about 80Kb/s (over an ethernet) whereas in the > other direction, the speed is what one would expect (given the hardware in > the Linux machine). This situation does not occur between 2.0.x kernels > and IRIX (with the same hardware on the Linux end), nor between a machine > with 2.2.1 and another with 2.0.36. > > I have yet to try a different ethernet card in the Linux machine, however > since the situation only occurs between IRIX & 2.2.1 and not > 2.0.x <-> 2.2.1, I suspect it might be something other than the ethernet > driver. > > It's hard to tell which end the problem is occuring. It's possible that > something is causing the TCP connection to incorrectly throttle down to a > slower speed. I would like to try and debug this further since I have > access to this mix of equipment, but I was hoping I might get some insight > on how to go about it and what to look for (possibly from a tcpdump > session).
Running vanilla 2.2.1 on a i386 and IRIX 6.2 on an Indy I cannot reproduce this problem; I'm running close to wirespeed in both directions. What IRIX exactly are you running?
Ralf
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