Messages in this thread | | | Date | Wed, 17 Nov 2004 11:25:56 -0800 | From | Harry Edmon <> | Subject | Re: Network slowdown from 2.6.7 to 2.6.9 |
| |
Tried your suggestion - no improvement.
Con Kolivas wrote:
> Stephen Hemminger writes: > >> On Tue, 16 Nov 2004 15:46:25 -0800 >> Harry Edmon <harry@atmos.washington.edu> wrote: >> >>> I have a system that is running a program that receives and sends >>> atmospheric data via TCP. Most of the data is either in little >>> packets (between 64 and 127 bytes) and large packets (between 1024 >>> and 1517). I am running this on a dual Xeon box (Tyan S2721-533 >>> motherboard) with 2 GB of memory and a Intel gigabit ethernet >>> (82546EB). I have been running this under 2.6.7. When I switch to >>> 2.6.9 on the same hardware, my network throughtput is cut by more >>> than half. All I can tell from looking at "netstat -s" is that my >>> TCP resets are orders of magnitude higher under 2.6.9 than 2.6.7. >>> Enclosed is my 2.6.7 and 2.6.9 config files. Anyone have any ideas >>> where I should look to find the problem? >> >> >> Do an OpenBSD or other firewall in the way that doesn't understand >> window >> scaling? OpenBSD pf doesn't correctly TCP window scaling so it ruins the >> throughput (typically 1/4 of expected). > > > Easiest way to see if this is responsible is to disable it and see if > the throughput improves > > echo 0 > /proc/sys/net/ipv4/tcp_window_scaling > > Cheers, > Con
- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |