Re: Network performance very ill

Russell Coker - mailing lists account (bofh@coker.com.au)
Sun, 03 May 98 16:08:10 +1100


>I'm currently running 2.1.99 and it's running great except for one problem
>that I've begun to notice in the neweer kernels, and it seems to be getting
>progressively worse.

>As an example, today I was compiling glibc-2.0.6 and downloading GDB 4.17.
>Glibc2 had been compiling a while before I started ncftp, and once the
>download began, it was going around 1.5kb/s. As time passed, it slowed down
>to a crawling 500b/s. At this point, I killed gcc and the ftp gradulaly
>gained speed back to 1.4kb/s.

>I can and have reproduced this problem many times and I think it should be
>addressed before we release the next stable branch. The general kernel
>performance has seemed to been degrading lately, at least, for me.

>I know it is not because my machine was "overloaded", because I am running a
>233mhz AMD K6 w/ 64MB RAM and I've run many things that take more resources
>than PPP, FTP, and EGCS.

This morning I noticed that I was getting very poor performance of the
terminal server I was logged into. It was a Linux box running 2.1.36 kernel.
I found that the system load was about 6 due to find processes spawning off
bzip2 processes uncontrollably. This system load was causing the machine to
take 9 seconds to reply to ping packets I was sending it over a 33K6 modem
link! If this is the same problem as you're seeing then it's obviously not a
new thing.

---
postmaster@smartweb.net is a non-valid email address.  The smartweb.net domain
seems basically non-functional.  If someone knows how to inform the
administrator could they please do so.

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