[NBLUG/talk] making DSL run faster
E Frank Ball
frankb at efball.com
Thu May 1 15:58:01 PDT 2003
This was linked on Slashdot today:
http://www.benzedrine.cx/ackpri.html
(does not render on Netscape 4.XX, mozilla works fine)
"Problem:
I'm using an asymmetric DSL with 512 kbps downstream and 128 kbps
upstream capacity (minus PPPoE overhead). When I download, I get
transfer rates of about 50 kB/s. But as soon as I start a concurrent
upload, the download rate drops significantly, to about 7 kB/s." ...
The graphs for the peformance improvement are amazing, take a look. Too
bad it's for BSD, not linux, but In the slashdot discussion there was
this link for linux:
http://lartc.org/lartc.html#LARTC.COOKBOOK.ULTIMATE-TC
"If we do all this we get the following measurements using an excellent
ADSL connection from xs4all in the Netherlands:
Baseline latency:
round-trip min/avg/max = 14.4/17.1/21.7 ms
Without traffic conditioner, while downloading:
round-trip min/avg/max = 560.9/573.6/586.4 ms
Without traffic conditioner, while uploading:
round-trip min/avg/max = 2041.4/2332.1/2427.6 ms
With conditioner, during 220kbit/s upload:
round-trip min/avg/max = 15.7/51.8/79.9 ms
With conditioner, during 850kbit/s download:
round-trip min/avg/max = 20.4/46.9/74.0 ms
When uploading, downloads proceed at ~80% of the available speed. Uploads
at around 90%. Latency then jumps to 850 ms, still figuring out why."
I haven't tried it yet, and I'm not even sure how to, but I really want
to, but this code is way over my head. Any comments from the guru's?
Can I just edit the speeds in the CBQ script, run it, and magic will
happen? I'm using Debian woody with Kernel 2.2.something (ipchains).
--
E Frank Ball frankb at efball.com
More information about the talk
mailing list