DSL Tweaking
Martin Stone
martin.stone at db.com
Mon Apr 19 15:04:38 UTC 2004
Wow, there's a candidate for the Most Pointless Response Award...
Actually, there are some values that people often tweak in hopes of getting
better broadband performance, sometimes with pretty decent results. Since I
don't run Linux at home, I don't know specifics for Linux and broadband, but I
do know that I was able to get an improvement in throughput on Mac OS X by
setting the following sysctl values:
net.inet.tcp.sendspace: 65536
net.inet.tcp.recvspace: 65536
net.inet.udp.recvspace: 73728
net.inet.tcp.delayed_ack: 0
There may be something analogous that you can do in Linux. The idea behind the
sendspace/recvspace lines is to increase the size of some TCP/IP fragmentation
buffers so that you can send and receive more packets at a time. The
delayed_ack flag turns off a waiting behavior of TCP with regard to
acknowledgement packets.
Your mileage may vary, etc., but there's no harm in fooling around with sysctl
and /proc/sys/net to see if you can get some better throughput. Also, check out
ip-sysctl.txt in the /usr/src/linux*/Documentation/networking directory for some
rather sketchy documentation on what all those values do.
Alexander Dalloz wrote:
> Am So, den 18.04.2004 schrieb edwarner99 at yahoo.com um 14:24:
>
>
>>I know that Linux if pretty efficient at optimizing
>>DSL connections and speed, but was wondering if there
>>are any "tweaks" to be aware of to speed up downloads?
>>Thanks,
>
>
> No.
>
> Alexander
>
>
>
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