[lug] NIC Speed

[Peter Hutnick]

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

On Thursday 02 May 2002 12:13 pm, Stephen Queen wrote:
> > Ha!  I just posted a message about NIC speeds to the CLUE-TECH list.  Go
> > figure.  Netcat seems to be usefull, as well as using the Tx an Rx bytes
> > numbers from ifconfig.  There is also a program called NetPerf, which I
> > have installed, but haven't ran yet.  So far, it seems that I am getting
> > only about 30% of the advertised 100 Mb/s between my machines and my
> > wife.  I have long suspeced that it was slower than it should be.  I am
> > investigating solutions.
>
> The advertised 100Mb/s is the maximum bit rate of the card, not the average
> sustained speed. If you are getting 30% of the maximum sustained speed from
> your NIC that would be in the acceptable or normal range.

Bear in mind as well that the bit rate reported by most programs is the rate 
of /data/ transfer.  All the overhead of all the protocols making that 
communication possible (like HTTP or FTP on top of TCP with all the 
associated ACKs and etc.) is actually being transfered by the hardware, but 
not reported by NcFTP or Mozilla.

- -Peter

- -- 
/"\ ASCII Ribbon campaign against HTML e-mail
\ /
 X   Get my PGP key at http://hutnick.com/pgp
/ \  6128 5651 6F23 EC17 6EBD  737D 960A 20E6 76CA 8A59
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.0.6 (GNU/Linux)
Comment: For info see http://www.gnupg.org

iD8DBQE80YKwlgog5nbKilkRAnv/AJ96+Vbe5mrTTQymMM3OMct6ILLTJQCeNMO6
ISlp6Vlfsx5tXcZ75BJCIjg=
=kSwg
-----END PGP SIGNATURE-----