On Wed, 20 Oct 1999, Paul Yaskowski wrote:
> % Geof Goodrum ([EMAIL PROTECTED]) [10.20.99/08:39]:
> : You never received a reply regarding your CCP (packet compression)
> : request, but it is rare for an ISP to support it. I personally agree with
> : Jamie Lokier's response; the built-in modem compression is "good enough."
> : Using the ppp packet compression (deflate or BSD) just increases your
> : system CPU and memory usage. Deflate/BSD make more sense for hardwired
> : connections.
>
> How much memory/CPU can it use (de)compressing 2.4k/s? Surely next
> to nothing. As you can see, 2.4k/s is not a very high number, and i'd
> try anything to increase my bandwidth. :)
I'm not really qualified to answer questions about the deflate or BSD
compression methods (but I'm going to anyway ;).
You are going to get higher throughput to/from the modem and
some improvements in overall throughput because the modem's compression
isn't as efficient (the software compression has larger compression
tables). If someone has the time to quantify the improvement
with different data types (text, binaries), it would be interesting and
might be worth noting in the PPP FAQ.
Memory usage should not be dependent upon the data rate, as most of it is
allocated for the compression tables. However, for slower rates the CPU
load would be lower.
Geof Goodrum
-
To unsubscribe from this list: send the line "unsubscribe linux-net" in
the body of a message to [EMAIL PROTECTED]
